Electronic gas supply pressure control, namely of methane or hydrogen, to internal combustion engine, and gas supply system containing such device

FIELD: engines and pumps.

SUBSTANCE: gas supply system, namely for supply of methane or hydrogen, to internal combustion engine includes multiple injectors with electromagnetic control, which are connected to various engine cylinders, distributing manifold or gas ramp, which are connected to injectors; gas supply tank to distributing manifold, in which compressed gas is accumulated, and pressure reducing valve. Electromagnetic control valve includes inlet hole connected to fuel tank, outlet hole connected to auxiliary inlet hole of pressure-reducing valve, as well as to distributing manifold; movable armature control solenoid that controls the connection between inlet holes and outlet hole of electromagnetic control valve to provide the specified gas pressure reduction in the channel from inlet hole to outlet hole of electromagnetic control valve. In addition, gas supply system includes electronic solenoid control device of electromagnetic control valve. Pressure reducing valve and electromagnetic control valve are combined in housing of common electronic pressure control. In the housing there is inlet hole for gas supplied from fuel tank; outlet hole for gas that is supplied to distributing manifold or gas ramp; connecting channel between inlet hole and pressure reducing valve; connecting channel between inlet hole and electromagnetic control valve; connecting channel between electromagnetic control valve and pressure reducing valve; connecting channel between electromagnetic control valve and outlet hole, and connecting channel between pressure reducing valve and outlet hole. In addition, the device includes electronic solenoid control module of electromagnetic control valve. Electronic pressure control for gas supply system, namely for supply of methane or hydrogen, to internal combustion engine has housing. In housing there combined is pressure reducing valve of gas supplied from fuel tank to the value required for gas supply to distributing manifold or gas ramp, and electromagnetic control valve having the possibility of generating pressure control signal on which pressure reduction degree depends, which is performed by means of pressure reducing valve, as well as connecting channels between the above valves and between each of the above valves and inlet hole and outlet hole of the device. In addition, the device includes electronic control module for control of electromagnetic control valve.

EFFECT: invention allows improving the proposed system, namely owing to simplifying and improving its components.

30 cl, 15 dwg

 

The present invention relates to systems for supplying gas, in particular compressed natural gas, for example methane or hydrogen in an internal combustion engine, particularly an automobile engine.

In documents EP 1593833 A1 and US 7036491 B2 disclosed a system for conveying gas of the above type, which represents a significant improvement compared to previously used systems for gas supply, in particular, from the point of view of ensuring effective regulation of the gas pressure in the distribution manifold or gas ramp when changing the operating conditions of the engine. Device for supplying gas of this type is illustrated in the above documents, specified in the restrictive part of claim 1 of the attached claims.

1 shows a diagram of a system for gas supply in accordance with one of several embodiments described in the above documents. On the specified drawing reference item 1 indicated injectors with solenoid control connected to different cylinders of the engine, which is supplied compressed gas from the distribution manifold or gas ramp 2. Reference number 3 indicated the fuel tank, used as a container in which is stored compressed gas, such as methane. The outlet of the fuel eat the awns 3 through the pipe 4 is connected to a distribution manifold 2. In the pipe 4 has been consistently found: the safety valve 5, a shut-off electromagnetic valve for blocking the outlet of the fuel tank 3; a pressure sensor 6 (in specific embodiments, the implementation of the valve 5 and the sensor 6 are included in the design of the fuel tank) and the pressure reducing valve 7. Reference position 2A indicated sensor for detecting the pressure in the gas ramp or distribution manifold 2.

For example, in a system for supplying methane source pressure of methane in the fuel tank 3, when it is full, approximately 200 bar. This pressure, of course, falls as emptied the fuel tank 3, until then, until it reaches a minimum value of about 20 bar.

However, the injectors with solenoid control 1 can operate at significantly lower pressure gas, typically less than 10 bar. The valve 7 is designed to reduce the gas pressure to the level required for normal operation of the injectors 1, in accordance with the calculated and specified parameters.

The design of the pressure reducing valve 7 devices for gas supply according to figure 1 is shown in enlarged scale in figure 2, which shows a view of the valve in longitudinal section.

As shown in figure 2, the pressure reducing valve has a valve body 8, to the m there is a narrow channel 9, located between the inlet channel 10, is made in the intake connection element 11, and the discharge channel 12 is performed in the discharge of the connecting element 13. The connecting element 11 must be connected to the pipe 4 (see figure 1)through which gas flows from the fuel tank 3. The connecting element 13 must be connected to the pipe 14, through which gas under reduced pressure in the gas manifold 2. The illustrated example relates to a single-stage valve, which provides one of the pressure jump. However, in accordance with an earlier priority documents, nothing prevents to create a valve, which is a sequence of two devices is illustrated in figure 2, to provide two surge pressure in a row.

In the case of the example illustrated in figure 2, a narrow channel 9 is formed by a ring made of metal or suitable plastic material 15 is pressed against the lower surface of the seat formed in the housing 8 of the valve, by means of a connecting element 11, which is screwed into the housing 8. The ring 15, in addition to the formation of a narrow channel 9, forms a valve seat for opening/closing ball type 16, preferably made of a metal material, which is pressed against the valve seat with rugini 17, which is located between the element opening/closing ball type 16 and an opposite surface formed by the connecting element 11. The spring 17 has a high elasticity and low pre-tension and has only the function of holding element opening/closing ball type 16 in a predetermined position.

The valve body 8 has an internal cylindrical cavity in which the piston 18 is installed in a sliding fit. The piston 18 typically has a cylindrical shape and has one front end, facing the camera 19, which in the lower part forms a narrow channel 9 and which is connected with the outlet channel 12. The front end face of the piston 18 includes a plunger 20 to push the element 16, the opening/closing ball type in the open position, overcoming the resistance of spring 17. The opposite end of the piston 18 facing toward the chamber 21 formed in the housing 8 of the valve between the piston 18 and the locking element 22 attached to the housing 8. The chamber 21 through the auxiliary connecting member 23 is connected with the channel 24, which must be passed into the chamber 21 of the control signal pressure tending to push the piston 18 downward (as shown in the drawings), in order to keep the element 16, the opening/closing ball type in the open position by the pusher 20.

Next explained Ave is narc works of well-known pressure reducing valve, above.

At rest regulating the pressure supplied to the chamber 21, the pushing element 16 of the opening/closure in its open position, overcoming the resistance of spring 17. The gas coming from the fuel tank 3 (see figure 1), reaches the inlet of the connecting element 11 and through a narrow channel 9 passes into the chamber 19. From the chamber 19 through the outlet of the connecting element 13 and line 14 (see figure 1) gas comes to the distribution manifold 2, and the gas pressure matches the required for normal operation of the injectors 1.

However, if the pressure in the chamber 19 of the piston 18 is shifted, breaking regulating the pressure in the chamber 21, in the direction of the camera 21 to the locking element 16 for opening/closing the socket in the ring 15. When the pressure in the chamber 19 will again fall to the calibrated value, the regulating pressure in the chamber 21 will again be able to move the piston 18 in the position in which he provides the opening element 16 open/close. Thus, the pressure in the chamber 19 is changed cycles, remaining in any event within reduced values required for normal operation of the injectors.

As shown in figure 1, the pipe 24, which regulates the pressure signal is fed into the chamber 21 of the pressure reducing valve 7 is located downstream of the regulating solenoid valve 25. To the u se of the regulating solenoid valve 25 is shown in an enlarged scale in figure 3. Regulating solenoid valve 25 is designed to receive at the inlet of the connecting device 26 gas pressure at the outlet of the fuel tank 3, which is connected with the connecting element 26 through line 27, the exhaust pipe 4 upstream pressure reducing valve 7. Regulating solenoid valve 25 creates in the exhaust connecting element 28, the signal pressure is reduced relative to the pressure at the inlet opening 26, which pipe 24 is transmitted in the auxiliary connecting element 23 pressure reducing valve 7. As mentioned above, the piston 18 of the valve 7 is pushed with the pressure signal, which is supplied through pipe 24. Therefore, by modifying the pressure signal can be modified response signal to the pressure reducing valve 7 and, consequently, modify, created a pressure surge or, in other words, to change the pressure of the gas flowing in the gas manifold 2.

As shown in figure 1, the electronic control receives from the sensor 2A pressure signal 29, showing the value of the pressure existing in the gas ramp 2, and compares it with the signal 30 indicating the desired pressure in the gas ramp 2 for each mode of operation. To this end, for example, in the electronic control module may include a storage means which stores a predetermined card, which provide the desired value or range of values of pressure in the gas ramp 2 when changing the operating parameters of the engine. Based on the comparison signal 29 with the signal 30 electronic control produces an output signal 31, which regulates the electromagnetic valve 25, to ensure, through the pressure reducing valve 7, the pressure jump at a given point in time. In the case of the device according to figure 1 is implemented closed-loop pressure control in gas ramp.

As shown in figure 3, the regulating solenoid valve 25 has a narrow channel 32 formed through the sleeve 33 is clamped in a respective seat formed in the housing 34 of the valve with the coil spring 35, one end of which is in contact with the sleeve 33, and the opposite end is in contact with the locking element 36, a screw-in housing 34. The sleeve 33 also forms the valve seat element 37 of the opening/closing ball type, which is connected to the armature 38 of the electromagnet, comprising a solenoid 39 and the spring 40 which tends to push the element opening/closing 37 in the closed position. Gas enters the valve through the channel 41 formed in the inlet connecting element 26, comes to the narrow channel 32 and through him, if the element 37 of the opening/closure is in the open position, into the chamber, soy is iannou with the exhaust channel 42, educated at the outlet of the connecting element 28.

The solenoid 39 is intended to regulate the pressure jump between the inlet and outlet holes of the valve 25 in order to provide at the outlet of the connecting element 28 is smoothly adjustable pressure required to reduce the pressure in the pressure reducing valve 7 in accordance with defined operating conditions of the engine.

Preferably the block With the management in advance do with the ability to control the periodic switching of the regulating solenoid valve 25 between its closed position and its open position with a predetermined frequency. Pressure control is achieved by changing the operating cycle of the valve, i.e. the change in each cycle, the ratio between the opening period and the total period of opening and closing the valve depending on operating conditions of the engine and, in particular, from the modes of static and dynamic loads of the engine.

The aim of the present invention is to improve the above system, in particular, due to the simplification and improvement of its components.

According to the first object of the invention created a system for conveying gas, in particular for feeding methane or hydrogen in an internal combustion engine, containing a number of injectors with electromagneticradiation, United with the various cylinders of the engine; a distribution manifold or gas manifold connected to the injectors; the capacity to supply gas distribution manifold in which is stored compressed gas; and a pressure reducing valve located in the connection between the tank and the distribution manifold; pressure reducing valve includes: inlet connected to the tank, and the exhaust port, connected to the distribution manifold, and an auxiliary inlet; and valve means arranged to determine the reduction of gas pressure in the channel from the inlet to the outlet, thus reducing the pressure depends on the pressure signal, served in the auxiliary inlet, and the system further comprises a regulating solenoid valve to supply pressure signal in the auxiliary inlet, thus regulating electromagnetic valve includes: an inlet hole connected to the fuel tank; outlet, coupled with the auxiliary inlet pressure reducing valve, and with a distribution manifold; a solenoid for controlling a movable anchor, which manages the connection between the inlet and the outlet regulating power is inanaga valve to achieve the specified reduction of gas pressure in the channel from the inlet to the outlet of the regulating solenoid valve, the system for gas supply further comprises an electronic device to control the solenoid regulating solenoid valve, and a pressure reducing valve and regulating solenoid valve combined in the case of a single device of the electronic pressure regulator, and the housing has inlet for the gas coming from the fuel tank; an outlet for gas which is fed into the distribution manifold or gas manifold; a conduit for connection between the inlet orifice and the pressure reducing valve; a channel for the connection between the inlet orifice and regulating solenoid valve; a conduit for connections between the control solenoid valve and pressure reducing valve; a channel for the connection between the regulating electromagnetic valve and the outlet; and a channel for the connection between the reducing valve and the outlet, and the device further comprises an electronic control module to control the solenoid regulating solenoid valve.

Preferably the device comprises a shut-off valve for closing the feed gas to the intake hole of the device.

Preferably the device includes a filter through which passes the gas flowing in the device.

Preferably the device is istwo contains a pressure sensor, coming into the device.

Preferably the device has a channel for connecting the outlet of the regulating solenoid valve with the outlet of the device connected to the distribution manifold or gas ramp, the channel for the connection includes a channel with a narrow area of a given size.

Preferably the channel with a narrow plot of land is located within the body element, split image is fixed on the device.

Preferably the specified element comprising a channel with a narrow land, a screw, screwed into the hole made in the case specified device, with its outer surface.

Preferably the electronic control module contains electronic means is arranged to compare the signal indicating the current value of the pressure existing in the distribution manifold or gas ramp with the control pressure signal and control, based on the comparison in accordance with the logic of a closed loop, solenoid regulating solenoid valve.

Preferably electronic means is arranged to control the solenoid with the generation of the first signal pulse-width modulation, in order to provide a varying level of pressure reduction, is due to the regulating solenoid valve, by changing the operating cycle of the electromagnetic valve, that is, by changing the ratio between the opening period and the total period of the opening and closing of the electromagnetic valve in each cycle.

Preferably the first signal pulse-width modulation includes, for each cycle of opening of the regulating solenoid valve, pulse, having a first part with high intensity to ensure valve opening and the second part with less intensity for holding the regulating electromagnetic valve in the open position.

Preferably electronic means is arranged to compare the signal indicating the current value of the current, existing in regulating solenoid of the electromagnetic valve with a control signal DC for controlling, based on the comparison, in accordance with the logic of a closed loop, force of the current of the first part with greater intensity and/or the second part with less intensity, to control the force of the current in the solenoid in the open position.

Preferably electronic means is arranged to operate a control current to the solenoid in the open position by generating the second signal pulse-width modulation superimposed on the first signal pulse-width modules and, which changes the degree of pressure reduction, due to the regulating solenoid valve by changing the operating cycle of the electromagnetic valve.

Preferably the control signal pressure is the specified value stored in the electronic control module.

Preferably the control pressure signal is issued by the electronic control unit associated with the electronic control module, for adjusting the control valve in accordance with working conditions.

Preferably the system comprises a bridge circuit connected between the electronic control module and a solenoid configured to supply current to the solenoid and discharge part of the current.

According to the second object of the invention a device of the electronic pressure regulator for the system for gas supply, in particular for feeding methane or hydrogen in an internal combustion engine having a housing with an inlet opening that communicates with the fuel tank with gas, and an outlet opening, which is connected to a distribution manifold or gas ramp system for supply of gas to the cylinders of the engine, in case combined pressure reducing valve for reducing the pressure of the gas coming from the fuel tank, to the amount required for filing Gaza distribution manifold or gas manifold, and regulating solenoid valve, is arranged to generate a signal to control pressure, which determines the degree of pressure reduction, carried out using the pressure reducing valve, as well as channels for the connection between the said valve and between each of these valves and the inlet and the outlet of the device, the device further comprises an electronic control unit for control of the regulating solenoid valve.

Preferably the device includes a shut-off valve for closing the feed gas to the intake hole of the device.

Preferably the device includes a filter through which passes the gas flowing in the device.

Preferably the device includes a sensor for measuring the pressure of gas into the device.

Preferably the device has a channel for connecting the outlet of the regulating solenoid valve with the outlet of the device connected to the distribution manifold or gas ramp, the channel for the connection includes a channel with a narrow area of a given size.

Preferably the channel with a narrow plot of land is located within the body element, fixed detachable manner on the device.

Site is preferably element, including a channel with a narrow land, a screw, screwed into a hole made in the case specified device, with its outer surface.

Preferably the electronic control module contains electronic means is arranged to compare the signal indicating the current value of the pressure existing in the distribution manifold or gas ramp with the control pressure signal and control, based on the comparison, in accordance with the logic of a closed loop, solenoid regulating solenoid valve.

Preferably electronic means is arranged to control the solenoid with the generation of the first signal pulse-width modulation, in order to provide a varying degree of pressure reduction, due to the regulating solenoid valve, by changing the operating cycle of the electromagnetic valve, that is, by changing the ratio between the opening period and the total period of the opening and closing of the electromagnetic valve in each cycle.

Preferably the first signal pulse-width modulation includes, for each cycle of opening of the regulating solenoid valve, pulse, having a first part with high intensity to ensure open reg which regulates the electromagnetic valve and the second part with less intensity to hold the specified regulating electromagnetic valve in the open state.

Preferably electronic means is arranged to compare the signal indicating the current value of a current that exists in the solenoid control current signal, and to control, based on the comparison, in accordance with the logic of a closed loop, force of the current in the solenoid of the first part with more amperage and/or the second part with less amperage.

Preferably electronic means is arranged to carry out the examination of the current opening in the solenoid with the help of generating the second signal pulse-width modulation superimposed on the first signal pulse-width modulation, which changes the degree of pressure reduction, due to the regulating solenoid valve by changing the operating cycle of the electromagnetic valve.

Preferably the control signal pressure is the specified value stored in the electronic control module.

Preferably the control pressure signal is issued by the electronic control unit associated with the electronic control module, for controlling the regulating valve in accordance with working conditions.

Preferably the device is made with the possibility of connection with the bridge circuit for applying current from the electronic control module to the solenoid and discharge of the t is CA.

The present invention will be described below with reference to the preferred implementation illustrated only as a non-limiting example in the accompanying drawings, in which:

Figure 1-3 - the above-described device according to the prior art;

4 and 5 views in perspective of the device electro-mechanical pressure regulator forming part of a system in accordance with the present invention;

Figa and 6B is viewed through the views in perspective of the component elements of the device shown in figure 4 and 5;

7, 8 and 9 are views in cross section of some of the elements of the device according to figure 4-6;

Figure 10 - diagram of the electronic control module solenoid regulating solenoid valve;

11 is a diagram of a system in accordance with the present invention;

Figa, 12B and 12C graphics time dependence of the signals generated by the electronic module figure 10; and

Fig - option 4.

Figure 1-3 belong to the prior art earlier patents, already described above.

Figure 4-11 reference position 43 shown all the device electro-mechanical pressure regulator, established in accordance with the present invention. The device 43 has a body 44 has a prismatic shape having a front surface 45 (see figure 5), the rear surface is of 46 (see 4), two side surfaces 47, the bottom surface 48 (see figure 5) and the upper surface 49 (see figure 4). The rear surface 46 has a protruding element 50.

As shown in Fig.7, the housing 44 has a cavity, starting with the lower surface 48, in which is placed a valve 7 pressure regulation. As with the previously described valve 7 pressure regulation, the relevant prior art (see figure 2), the valve 7 pressure regulation, shown in Fig.7, is a piston 18 which is mounted in a sliding fit in the cylindrical part of the cavity 51 with the rings 52 and 53. One end of the piston 18 extends into the chamber 19, which is connected through the channel 54 (see figa, 6B and 7) with a hole 55, is made in the surface 47 of the device (see figure 4 and 5), to install the exhaust coupling element, to which may be connected a pipe 14 (see 11), through which gas from the exhaust openings 43 enters the distribution manifold or gas manifold 2. The camera 19 is also connected with a passage or channel 56 to supply compressed gas coming from the tank, through a narrow channel 9 formed by the ring 15 located in a corresponding socket formed by the surface of the cavity 51. By analogy with the shown device relating to the prior art (see figure 2), the connection is controlled by the element 16 open the Oia/closing ball type, who built the spring 17, pre-installed in the extended end part of the channel 56, which passes into the cavity 51. The spring 17 tends to press the element 16, the opening/closing ball type to a conical seat formed on the front surface of the ring 15, addressed to the member 16 of the opening/closing ball type, in order to close the passage through the narrow section 9. By analogy with the already described known device shown in figure 2, item 16 of the opening/closing ball can move in the direction of the open position of the joint, overcoming the resistance of spring 17, with the help of the pusher 20, which is rigidly fixed to the end face of the piston 18 from the chamber 19.

The opposite end of the piston 18 extends into the chamber 21 formed between the piston 18 and the locking element 57, which is mounted in the cavity 51 with the sealing ring 58 and which has an end portion shaped like a rectangular plate with a hole in the center, attached with screws to the lower surface 48 (see figure 5) of the device 43. The camera 21 is connected through one or more radial holes 57a, is made in the case of item 57, annular chamber 57b formed annular groove element 57. Luggage 57b in turn communicates with a channel 58 (see figa), which is made in the device 43, the address to receive the gas, coming out of the regulating solenoid valve 25, as will be described in detail below.

On one of the two side surfaces 47 of the device 43 with screws fixed plate 59 (see figure 4 and 5), which closes the saddle, leaving the surface where you put the filter 60 (see figa and 6B) for filtering the gas coming from the tank. The gas discharged from the container enters the body 44 of the device 43 through the inlet connecting element (not shown)that is installed in the inlet hole 61 (see figure 5, 6A and 6B), performed on the front surface 45 of the housing 44 of the device 43. The gas, which enters through the inlet 61 reaches of channel 56 (see Fig.7), through which the gas passes into the pressure reducing valve 7, after which it passes through the filter 60 through channels not visible in the drawings.

In addition, the connection between the inlet 61 and the channel 56 is controlled by shut-off solenoid valve 62 (see figure 4, 5, 6A, and 6B), which is located behind the filter, which is a device of a known type, which is placed at the saddle, made in the device, starting from the top surface 49. On a given surface mounted housing a electromagnet associated with shut-off valve.

On the upper surface of the housing 44 also made a slot 63 (see figa and 6B) for the pressure sensor, postupaesh is in the device, this sensor includes a top portion 63A, the protruding above the upper surface 49 of the housing 44 of the device.

As shown, in particular, on FIGU an offshoot from the channel 56 through which gas under high pressure enters the pressure reducing valve 7 is channel 64 through which gas under high pressure enters the regulating electromagnetic discharge valve 25.

The control valve 25 is installed in the cavity 65 (see Fig)made in the housing 44 of the device 43 from the inclined surface 50A (see figure 4) protruding element 50.

As shown in Fig, by analogy with the description of the already known regulating solenoid valve, shown in figure 3, the control valve 25, which forms part of the device in accordance with the present invention, contains a narrow channel 32, is made in the center along the axis of the disk 33, which is fixed on the end surface of the cavity 65, in which the ends of the channel 64. One end of the narrow channel 32 may be closed with item 37 of the opening/closing ball type, held a movable armature 38 of the electromagnet, comprising a solenoid 39, located in the housing to the sleeve 39A fixed in the cavity 65. The spring 40 is placed in a nest made in a Central plunger, forming an integral element of the bushing that supports the solenoid and seeking prodvinutykh 38 in position to close the narrow channel 32. The anchor 38 is formed by a disk facing to one end of solenoid 39 so that it is more efficient to use the lines of magnetic flux generated by the solenoid, compared to the more traditional designs of the electromagnet, in which a movable anchor is a pusher, which crosses the coil in the axial direction.

On the outer side of the housing that supports the solenoid is secured to a removable cover 66 type of cap (see figure 4), which contains and protects the electronic module to control the solenoid 39.

When the connection is through a narrow channel 32 is open, gas from the channel 64, passes into the chamber 67 with the lower pressure. Gas at a reduced pressure delivered from the chamber 67, passes through the channel 58 (see figa) into the chamber 21 (see Fig.7) pressure reducing valve 7.

As shown in Fig.9, the channel 58 also crosses the hole 68 located in the inclined surface 50A of the housing 44, and the screw which secures the screw 69 (see also figure 4). The specified screw has a body with a portion of restricted diameter, which forms, together with the wall of the bore 68, the angle of the camera 70. The specified angle camera 70, which is thus connected with the channel 58 (see figa), passing from the outlet of the regulating valve 25, also connected with the channel 54 to release gas from the device 43 through a narrow hole is 71 calibrated diameter, passing radially through the body of the screw 69 and ends in the axial channel 72, which also occurs in the body of the screw 69 and in turn ends at the end of the housing of the screw in the channel 54.

Therefore, as can be seen, the outlet of the regulating solenoid valve 25, except that it connects with the chamber 21 of the pressure reducing valve 7 is connected directly to the distribution manifold or gas ramp with a narrow channel 71. Specified narrow channel has proven effective for normal operation of the regulating solenoid valve and all electro-mechanical pressure regulator. Special installation described above, provides an additional advantage is the possibility of using different screws with different diameters and narrow openings, so that it is easy to change the diameter of the hole 71 in accordance with the specific requirements of the operation.

The channel 54, which leads to the outlet device, connected through channel 73 (see figa) with a cavity facing inclined surface 50A on which is mounted a valve limiting pressure 74 (essentially known type and therefore not shown here)that is designed to release gas out if the pressure in the channel 54 exceeds and caliber of the TES value.

As shown in figure 4 and 5, the housing 44 of the device 43 also has an inlet connecting element 75 and the exhaust coupling element 76 to heat the fluid that circulates through the channel (not shown in the drawings)made in the housing 44 to prevent ice formation, associated with the cooling due to expansion of the gas in the device. Alternatively, you can use an electric heating device. However, it should also be noted that the cooling caused by the expansion of the gas, at least partly beneficial, to ensure the normal operation of the electronic module forming part of the device, and Vice versa, the heating components of the electronic module during operation compensates, at least in part to excessive cooling due to expansion of the gas.

The variant example of implementation of the electronic control module solenoid 39 of the control valve 25 is shown in figure 10, on which he marked reference position 77. As noted earlier, the present invention also differs in that the electronic control module regulating valve is included with the product according to the invention.

As described above, the solenoid 39 of the electromagnetic valve 25 is controlled by an electronic module using the signal Shiro is but-width modulation, to ensure the change of pressure in the control valve 25 by changing the working cycle of the valve, that is, by varying the ratio between the period of valve opening and the total period of the opening and closing of the valve in each cycle.

Therefore, the electronic module 77 includes, in particular, the control logic 110, for example, provided by a registered specialized integrated circuits. The specified control logic 110 provides overall management of the waveform of the current supplied to the solenoid 39 in the form of a signal P1 pulse-width modulation. In the illustrated example, the specified signal P1 pulse-width modulation is transmitted with a frequency of 20 Hz.

The solenoid 39 of the electromagnetic valve 25 (not shown in figure 11) is connected between a positive terminal 113 and a negative terminal 112 at the output of the electronic module 77, on which the signal P1 pulse-width modulation is supplied via the control cascade 150 generated using cascades of current amplifier, that is, using schemes capable of providing high currents for very short periods of time (usually only a few tens of nanoseconds), and using the bridge circuit 190 having an external connection to the respective terminals of the electronic module 77. The operation of the bridge circuit 190 will be described below in more detail the O.

The electronic control module solenoid 77 contains many input terminals, namely:

at the input terminal 100 receives the signal L reduce engine speed generated by the unit With the engine control, which, through the interface module 120 LAN type LIN is transmitted to the control logic 110 for transmission of commands from the electronic engine control unit;

at the input terminal 101 receives a signal using a specially installed sensor, which can be a sensor 2A with figure 1, which is associated with the block With the engine control, or a separate sensor, and the signal shows the pressure Prailin the gas rail 2, while the terminal 102 and 103 receives the signal pressure Ptankin the vessel 3 and the temperature signal Temp in the reservoir; however, the signals at terminals 101, 102, 103 are input signals of the multiplexer 140, which of these signals selects the signal that should be transmitted to the control logic 110 after preliminary conversion to 8-bit digital signal is performed in the analog-to-digital Converter 130, and in the preferred embodiment, the electronic module 77 presents only the signal indicating the pressure Prailin the gas rail 2, so that the multiplexer 140 is not required, and analog-to-digital Converter core is ve signal, showing the pressure Prailin the gas ramp 2, generates a digital feedback signal from pressure Xp;

at the input terminal 103 voltage Vbattbattery managed using the ignition key, which is served in the block 160 power electronic module 77; unit 160 power supply applies a voltage, for example 5, to ensure the functioning of the control logic 110; in addition, he also works as a regulating device for supplying a stabilized voltage 18 In the interface module 120 local network, in the case of voltage spikes in load, performing the function of the so-called discharge element; and at high voltages, for example, In excess of 27, the interface module 120 local network can indeed be damaged; in addition, the electronic module 77 contains the source 165 power sensors for submission to the output terminal 105 of the digital voltage VDDpower supply for sensors, and the output terminal 106 of the corresponding digital signal point SGNDgrounding;

at the input terminal 115 of the control unit receives the PWM signal to generate the pulse-width modulation; and this signal, which is then passed directly into the control logic 110 is excessive in relation to the information contained in the signal L reduction of oratov of the engine; so it is actually a redundant signal in order to avoid possible debounce wires that connect the electronic module 77 unit With engine control.

Control logic 110 includes a controller 119 proportional-integral type, which provides, based on the desired pressure determined by the control unit With the control (preset) value depending on the regulator or, as described in more detail below, defined directly in the electronic module 77 depending on the encoder signal P1 pulse-width modulation. As an example, the controller 119 proportional-integral type, but it is clear that the management logic 110 may be implemented with other types of controllers. The signal P1 pulse-width modulation reaches the gate electrode of the MOS transistor 171, part of the bridge circuit 190, the source electrode of which is connected to a positive terminal 113 of the solenoid 39. The wire that connects the controller 119 with a negative terminal 112 of the solenoid 39, instead of the transmission of the modulated signal, provides a constant level of current at the opening of the solenoid 39. The specified wire through the terminal 111 is connected to the gate electrode of the second MOS transistor 172, the drain electrode of which is connected to terminal 112. Between the electrodes of the flow of the OP transistors 171 and 172 connected to the first diode 173, and the second diode 174 is connected between terminal 108, which is connected in turn with a ground electrode GND on the terminal 107, and the source electrode of the MOS transistor 171. The MOS transistors 171 and 172 and the diodes 173 and 174 form a bridge circuit 190 having an external connection to the electronic module 77 via terminals 108, 109, 111, 112, 113, 114 and 115. The specified external connection selected mostly to limit the overall dimensions of the electronic module 77, although, of course, you can enable bridge circuit 190 in the electronic module 77.

Thus, the electronic module 77 also includes input terminals 115 and 109, which feedback circuit through the respective amplifiers 151 and 152 in module 77 serves voltage of the drain electrode of the MOS transistor 171 and the voltage of the source electrode of the MOS transistor 172 to the controller 119 to provide diagnostic functions on the basis of continuous monitoring of the voltage between the drain and source of the MOS transistors 171 and 172.

The MOS transistor 171 has its own drain electrode connected to terminal 116, which is served voltage VBD of the battery, meaning the voltage taken directly from the pole of the car battery without adjustment under the control of the ignition key. Field-effect transistor 172 has its own source electrode connected to the terminal 109.

In addition, there readout resistor 180, otklucheny between the source electrode of the MOS transistor 172 and the ground GND, to measure the current I in the solenoid 39. Reading resistor 180 is also usually has an external connection to the electronic module 77. In the presented example of the operating device, as explained in more detail below, when the current levels 12 and 5 And the readout resistor 180 has a resistance of 10 mω. In parallel to the readout resistor 180, between terminals 109 and 108, the electronic module 77 are the inputs of the amplifier 166, which takes the measured value of the current after amplification to the inverting input of the second differential amplifier 164. The amplifier 164 receives at its other input the output signal of the d / a Converter 162, which converts 8-bit digital signal XIrepresenting the desired or reference value of the current.

Thus, at the output of amplifier 164 has an analog signal E of the current uncertainty, representing the difference between the strength of the current I, current in the solenoid 39, and the required value of the current strength XI. The specified analog signal E of the current uncertainty is supplied to the inverting input of another differential amplifier 117, which control logic 110, the other input of the generator 118 also comprises control logic 110, is supplied high-frequency signal of a triangular shape, for example with a frequency of 30 kHz. On the basis of the difference pointed to by the x signal and depending on the level of the analog signal S of the current uncertainty on the output of the differential amplifier 117, in accordance with the strategy of generating a signal pulse-width modulation, in essence known, formed the second signal P2 pulse-width modulation, generated with a frequency of about 30 kHz and with a duty cycle varying depending on the analog signal E of the current uncertainty. The second signal P2 pulse-width modulation is fed to the controller 119 for the implementation of the second modulation which is superimposed on the first signal P1 pulse-width modulation.

On the chart with Figo in more detail shows the first signal P1 pulse-width modulation, which is the total period T, while a high level of current I is maintained during the period, corresponding to the position of opening of the electromagnetic valve 25. As already mentioned, when you change the period THAT varies the ratio between the period of valve opening and the total period of the opening and closing of the valve in each cycle. Thus, regulated or reduced pressure by means of a closed control circuit based on the required pressure or the set value received by the unit With the engine control (regulator) or determined by a blown fuse in the non-volatile memory control logic (in the case of the gearbox), and also on the basis of the signal pressure existing in the gas ramp 2, which is served by the feedback circuit, namely the signal pressure in the gas ramp Prail.

For clarification on Fig shown In waveform P1 pulse-width modulation, approximated for ease of presentation, in the form of a rectangular pulse, as figa, in order to present more clearly the form of the time dependence of the first pulse modulation. As you can see from the chart on FIGU, the signal P1 rectangular shape actually is a two-level signal, which includes a first, higher level of peak current I1 relating to the maximum period T1, and a second, lower level of the holding current I2 relating to the subsequent retention period T2. The sum of the periods T1 and T2, of course, corresponds to the period of THE valve opening, however, the period T1 corresponds to the initial stage of valve opening, which requires a higher current values to move the moving element, for example 12A, whereas the period T2 corresponds to retain the valve in the open position, which requires less current, for example 5A. When changing the period of THE opening preferably, the peak period T1 has only changed to the maximum value (for example, 2.5 MS) and not more, given that the rest of the period change of opening IT due to the retention period T2.

On phila part of the signal according figv, corresponding, in particular, the first level of the peak current I1. On the basis shown in figs you can understand how in fact this level of current, and, on the other hand, the second level of the holding current I2 obtained using a modulation that is used by a signal pulse-width modulation P2, managed by means of the described control circuit current and passing through the blocks 162, which provides the desired current value XI, 166, 164, 118 and 117, and by using the read resistor 180, which is provided in the feedback circuit, the value of current I, current in the solenoid 39 of the valve 25.

A second signal P2 pulse-width modulation is due, in particular, the presence of as element of the solenoid 39 of the valve 25, which can not be operated with constant current, because of its inductive nature. In this regard, the bridge circuit 190 when the second signal P2 pulse-width modulation is used, the maximum current, i.e. the level I1, ensures that part of the current discharged through the diode 174 to until, in the next cycle of the second signal pulse-width modulation P2, the level of current in the MOS transistor 171 and, therefore, on the positive terminal 113 connected to the solenoid 39, will rise up to 12A./p>

When the MOS transistor 172 to the negative terminal 112 during valve opening comes into an open state and receives a constant level, and not the signal pulse-width modulation. The diode 173 in a bridge circuit 190 performs the function of an additional protective element in order to prevent the voltage generated in the solenoid 39, higher direct voltage VBDthe battery that can cause failures.

Figure 11 shows a diagram of the device for gas supply in accordance with the present invention. In this scheme, the elements 5 and 6 are not shown, since they are included in the composition of the fuel tank 3. Through the use of device 43 electro-mechanical pressure regulator, system components include only the fuel tank 3, the pipeline gas supply 4 through which gas under high pressure flows from the outlet of the fuel tank 3, provided with the usual shut-off valve, to the inlet connecting element device 43, and the channel 14 through which gas under low pressure is supplied from the exhaust openings 43 into the reservoir or gas manifold 2.

Thus, in the first embodiment, it is possible to assume that the only electronic control device regulating valve is e-fashion is ü 77, mounted directly on the housing 44. In this case, the device in accordance with the invention can operate without connection to the electronic unit With the engine control of the vehicle. The electronic module 77 to the control device 43 is programmed to ensure reducing the pressure of the gas coming from the gas tank, in accordance with the required and pre-established criteria, with a high degree of accuracy, for example, about 0.1 bar. The thus constructed device 43 is an electronic gearbox.

As further shown in scheme 11, closed-loop control system, in the case of electronic gear, is provided by obtaining the feedback channel pressure Prailexisting in the gas ramp 2, the terminal 101 and by reading the required pressure values from non-volatile memory associated with the controller 119. Preferably, if the storage required pressure in the non-volatile memory is used a storage device with fuses, which first determines the set of values of the desired pressure, for example eight values, and thus by burnout, before the final use of the gearbox, the relevant fuses in the non-volatile memory, to determine on whom but the value of the desired pressure for closed-loop control system on the pressure. It is clear that in this case, the interface module 120 local network may not be used, at least for the purposes of regulating the pressure. Alternatively, of course, possible to use other types of non-volatile memory such as electrically erasable programmable ROM or flash ROM, in addition to memory with fuses to store the desired value of the pressure, although the memory fuse is a very inexpensive solution, suitable for small amounts of stored information.

In the second embodiment, corresponding to the scheme shown in 11, the electronic module 77 device 43 is connected and connected to the electronic unit With the engine control, in particular, via terminals 100 and 116, and interacts with it in order to know in each case the mode of operation of the engine and in accordance therewith to regulate the pressure decrease, according to programmable logic, depending on the operating conditions of the engine.

When operating the pressure reducing valve 7 operates similarly as described with reference to the prior art. As shown in Fig.7, in each operating mode, the gas coming from the fuel tank, passes into the device through the inlet opening 61, passes through the filter 60 and through a check valve 62, which during normal operation of the engine is open, and to tiget channel 56. Gas under high pressure is supplied, on the other hand, again through the channel 56 and channel 64, which branches off from him, in the control valve 25, which is forcing it through a narrow channel 32, so that the gas under reduced pressure passed into the chamber 21 of the valve 7. Thus, the piston 18 moves upward (as shown in Fig.7), thereby moving by means of the pusher element 20 16 opening/closing ball type in the open position, overcoming the resistance of the spring 17, so that the gas under high pressure coming from the channel 56 can pass through the narrow channel 9 of the valve 7 pressure drops to the desired level and, therefore, enters the distribution manifold or gas manifold 2 at the specified reduced pressure through the chamber 19, the channel 54 and outlet 55 of the device 43. As has been described above with reference to the prior art, the degree of pressure reduction of the gas pressure at which the gas is in the fuel tank 3 to the pressure under which it enters the distribution manifold or gas manifold 2, depends on the pressure signal, which reaches the chamber 21 and which is determined by using a regulating valve 25.

As is clear from the above description, the invention involves limiting the simplification and improvement of the system for supplying gas to the engine by creating a single electro-mechanical unit, which combines a pressure reducing valve and the control valve, as well as other possible auxiliary devices, such as gate valve, filter, pressure gauge, safety valve limiting pressure. All channels for the connection between these components is executed in the device. In addition, this device includes an electronic control module, in order to create a functionally complete device, which if necessary should simply be installed in the connection between the fuel tank and a distribution manifold or gas ramp, providing, in addition, the connection between the electronic control module of the device, and an electronic engine control unit.

Placing the electronic module directly on the device provides additional advantages associated with the dissipation of heat generated from the specified electronic module. In fact, initially, the gas which is supplied to the device, due to the ongoing enlargement process is at a low temperature. Therefore, the electronic module does not require bulky or complex solutions for the dissipation of heat generated by electrical circuits, in particular a MOS transistor, as the heat is absorbed by the gas. The specified heat of absorption is my gas provides an additional advantage, because usually in these systems, the gas should in any case be heated for use in the combustion chamber.

Of course, without prejudice to the principle of the invention, the construction details and options for implementation may vary considerably with respect to those described and illustrated purely as an example, without departing from the scope of formulas of the present invention.

On Fig shows an alternative variant example of implementation with a different location of the electronic module 77 and the corresponding housing 44. On the specified drawing shows also the cables for the connection between the module 66 and a solenoid regulating solenoid valve 25.

1. A system for conveying gas, in particular for feeding methane or hydrogen in an internal combustion engine, comprising:
many injectors (1) with electromagnetic control connected with the various cylinders of the engine;
the distribution manifold or gas manifold (2)connected to the injectors (1);
capacity (3) for feeding gas distribution manifold (2)in which is stored compressed gas; and
pressure reducing valve (7)located in the connection between the receptacle (3) and the discharge header (2);
when this pressure reducing valve contains:
inlet, the United States with a capacity of (3), and the exhaust port is connected to a distribution manifold (2)and the auxiliary inlet; and
valve means(9, 16, 17, 20, 21), configured to determine the reduction of gas pressure in the channel from the inlet to the outlet, thus reducing the pressure depends on the pressure signal is fed into the auxiliary inlet, and the system further comprises a regulating solenoid valve (25) for the signal pressure in the auxiliary inlet, thus regulating electromagnetic valve includes:
inlet connected to the fuel tank (3);
outlet, coupled with the auxiliary inlet pressure reducing valve (7), as well as with the distribution manifold (2);
a solenoid for controlling a movable anchor, which manages the connection between the inlet and the outlet of the regulating solenoid valve (25) to achieve the specified reduction of gas pressure in the channel from the inlet to the outlet of the regulating solenoid valve (25),
the system for gas supply further comprises an electronic device to control the solenoid regulating solenoid valve (25), characterized in that
reduc the ion valve (7) and regulating solenoid valve (25) incorporated in the housing (44) of a single device (43) electronic pressure regulator
moreover, in the housing (44) includes:
the inlet opening (61) of the gas coming from the fuel tank (3);
the outlet (55) for gas, which is supplied to the distribution manifold or gas manifold (2);
channel (56) for connection between the inlet (61) and relief valve (7);
channel (56, 64) for connection between the inlet (61) and regulating solenoid valve (25);
the channel (58) for the connection between the regulating solenoid valve (25) and a pressure reducing valve (7);
channel (58, 70-72) for connection between the regulating solenoid valve (25) and the outlet (55); and
the channel (54) for connection between the reducing valve (7) and the outlet (55),
moreover, the device (43) further comprises an electronic control module (77) to control the solenoid (39) regulating solenoid valve (25).

2. The system according to claim 1, characterized in that the device (43) contains a stop valve (62) for closing the feed gas to the intake hole of the device.

3. The system according to claim 1, characterized in that the device (43) includes a filter (60), through which passes the gas flowing in the device.

4. The system according to claim 1, characterized in that the device (43) includes a sensor (63) gas pressure coming into the unit.

5. The system according to claim 1, characterized in that the device imeeting (58, 70-72) for connecting the outlet of the regulating solenoid valve (25) with the outlet device (43)connected to the distribution manifold or gas ramp (2), and the channel for the connection includes a narrow channel section (71) of the specified size.

6. The system according to claim 5, characterized in that the channel with a narrow stretch of (71) is made in the case of item (69), split image is fixed on the device.

7. The system according to claim 6, characterized in that said element comprising a channel with a narrow stretch of (71)is a screw (69), screwed into the hole made in the casing (44) of the specified device, with its outer surface (50A).

8. The system according to claim 1, characterized in that the electronic control module (77) contains electronic means (110), arranged to compare the signal indicating the current pressure value (Prail)that exists in the distribution manifold or gas ramp (2), with the control pressure signal and control based on the comparison in accordance with the logic of a closed loop, solenoid (39) regulating solenoid valve (25).

9. The system of claim 8, wherein the electronic means (110) is arranged to control solenoid (39) using the generating of the first signal (P1) pulse-width is odulele, in order to provide a varying level of pressure reduction due to the regulating solenoid valve (25), by changing the operating cycle of the electromagnetic valve (25), that is, by changing the ratio between the period (T) of the opening and the total period of the opening and closing of the electromagnetic valve (25) in each cycle.

10. The system according to claim 9, characterized in that the first signal (P1) pulse-width modulation includes for each cycle of opening of the regulating solenoid valve (25) pulse having a first part (T1) with a higher intensity (I1) to ensure valve opening, and the second part (T2) with lower intensity (I2) for holding the regulating solenoid valve (25) in the open position.

11. The system of claim 10, wherein the electronic means (110) is arranged to compare the signal showing the actual current (I)existing solenoid (39) regulating solenoid valve (25), with the control signal DC (XIto control, based on the comparison in accordance with the logic of closed loop current strength of the first part (T1) with a higher intensity (I1) and/or the second part (T2) with lower intensity (I2) for the force control of the current in the solenoid (39) in the open position.

12. The system according to claim 11, otlichayas the same time, that e (110) is configured to perform checking of the current in the solenoid (39) in the open position using the generate (119) of the second signal (P2) pulse-width modulation superimposed on the first (P1) of the signal pulse-width modulation, which changes the degree of pressure reduction, due to the regulating solenoid valve (25) by changing the operating cycle of the electromagnetic valve.

13. The system of claim 8, wherein the control signal pressure (Prail) is a set value stored in the electronic control module (77).

14. The system of claim 8, wherein the control signal (Prailpressure gets an electronic unit (S) control that is associated with the electronic control module (77)for adjustment of the regulating valve (25) in accordance with working conditions.

15. The system of claim 8, characterized in that it contains a bridge circuit (190)connected between the electronic control module (77) and the solenoid (39), is arranged to supply current to the solenoid (39) and discharge part of the current.

16. The device is an electronic pressure regulator for the system for gas supply, in particular for the supply of methane or hydrogen in an internal combustion engine, characterized in that it has a housing (44) with the inlet hole is a tie (61), which connects with the fuel tank (3) with gas, and the outlet (55), which is connected to a distribution manifold or gas ramp (2) system for supply of gas to the engine cylinders, while in the case (44) combined pressure reducing valve (7) to reduce the pressure of the gas coming from the fuel tank (3), to the value required to supply gas distribution manifold or gas manifold (2), and regulating solenoid valve (25), is arranged to generate a signal to control pressure, which determines the degree reducing the pressure conducted through the pressure reducing valve (7), as well as channels for the connection between the valves (7, 25) and between each of these valves (7, 25) inlet (61) and the outlet (55) of the device, the device further comprises an electronic control module (77) for control of the regulating solenoid valve (25).

17. The device according to item 16, characterized in that it includes a shut-off valve (62) for closing the feed gas to the intake hole of the device.

18. The device according to item 16, characterized in that it includes a filter (60), through which passes the gas flowing in the device.

19. The device according to item 16, characterized in that it comprises a sensor (63) for erenia gas pressure, coming into the device.

20. The device according to item 16, characterized in that it has a channel (58, 70-72) for connecting the outlet of the regulating solenoid valve (25) with the outlet device (43)connected to the distribution manifold or gas ramp (2), and the channel for the connection includes a narrow channel section (71) of the specified size.

21. The device according to claim 20, characterized in that the channel with a narrow stretch of (71) is made in the case of item (69), fixed detachable manner on the device.

22. The device according to item 21, wherein the element includes a channel with a narrow stretch of (71)is a screw (69), screwed into a hole made in the casing (44) of the specified device, with its outer surface (50A).

23. The device according to item 16, characterized in that the electronic control module (77) contains electronic means is arranged to compare the signal indicating the current pressure value (Prail)that exists in the distribution manifold or gas ramp (2), with the control pressure signal and control based on the comparison in accordance with the logic of a closed loop, solenoid (39) regulating solenoid valve (25).

24. The device according to item 16, characterized in that the electronic means (110) is made with a chance to view the th control solenoid (39) using the generating of the first signal (P1) pulse-width modulation, to provide a varying degree of pressure reduction, due to the regulating solenoid valve (25), by changing the operating cycle of the electromagnetic valve (25), that is, by changing the ratio between the period (T) of the opening and the total period of the opening and closing of the electromagnetic valve (25) in each cycle.

25. The device according to paragraph 24, wherein the first signal (P1) pulse-width modulation includes for each cycle of opening of the regulating solenoid valve (25) pulse having a first part (T1) with a higher intensity (I1) to ensure the opening of the regulating solenoid valve (25), and the second part (T2) with lower intensity (I2) for holding the specified regulating solenoid valve (25) in the open state.

26. The device according A.25, characterized in that the electronic means (110) is arranged to compare the signal showing the actual current (I)existing solenoid (39), with the control signal DC (XI), and to control, based on the comparison in accordance with the logic of closed loop power current in the solenoid (39) the first part (T1) with greater force current (I1) and/or the second part (T2) with less power current (I2).

27. The device according to p, characterized in that the electronic means (110) is made with the possibility of the spine to check current opening solenoid (39) using the generate (119) of the second signal (P2) pulse-width modulation, superimposed on the first signal (P1) pulse-width modulation, which changes the degree of pressure reduction, due to the regulating solenoid valve (25) by changing the operating cycle of the electromagnetic valve.

28. The device according to item 23, wherein the control signal pressure is the specified value stored in the electronic control module (77).

29. The device according to item 23, wherein the control pressure signal is issued to the electronic unit (S) control that is associated with the electronic control module (77), to operate a control valve (25) in accordance with working conditions.

30. The device according to item 23, characterized in that it is made with the possibility of connection with the bridge circuit (190) for applying current from the electronic control module (77) to the solenoid (39) and discharge part of the current.



 

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6 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: in internal combustion engine operating on gaseous fuel the ignition device (16; 60, 62; 64; 66) is arranged in the direction of gaseous fuel flow injected through injection valve (40) to combustion chamber (10). Ignition device can directly ignite fuel flow and control unit (70) intended to monitor the actuation time of ignition device (16; 60, 62; 64; 66) and actuation time of injection valve (40) in the cylinder for the purpose of implementing the change by means of this type of combustion of gaseous fuel injected through injection valve to cylinder between combustion of pre-mixed air-and-fuel mixture and diffusion combustion; at that, control unit (70) chooses as the operating mode of engine the operation on poor pre-mixed air-and-fuel mixture for pre-mixing and combustion of gaseous fuel at poor ratio of the quantity of air to the quantity of fuel when the engine operates in the specified working area, and chooses as the operating mode of the engine the diffusion combustion for diffusion combustion of gaseous fuel when the engine operates in the area of higher loads then the specified working area.

EFFECT: increasing efficiency and decreasing the level of exhaust from the area of low loads to the area of high loads.

20 cl, 37 dwg

FIELD: engines and pumps.

SUBSTANCE: invention is related to propulsion engineering, in particular, to devices for lowering of gas pressure, control and stabilisation of output pressure specified value. High pressure gas-pressure reducer may be used in systems of gas supply to transport means engines, and also stationary internal combustion engines with microprocessor control systems. Application of this reducer in internal combustion engines will make it possible to save fuel and reduce amount of emission into environment by microprocessor control of gas pressure. High pressure gas-pressure reducer comprises two stages for reduction and stabilisation of output pressure and is equipped by meter of control pressure, step-servo motor with output shaft installed in lower part of reducer, thrust bearing and microprocessor. The first stage of reducer comprises seat, stop device valve, safety valve and membrane with spring that is connected via double-arm lever to stop device valve. The second stage comprises chamber and valve, output shaft of electric motor rests against second stage valve stem through thrust bearing. Control pressure meter in the second stage chamber is pressure detector, shaping signal sent to microprocessor, which switches on step-servo motor.

EFFECT: fuel saving and lowering amount of emission to environment.

2 dwg

FIELD: mechanical engineering; engines.

SUBSTANCE: invention relates to gas supply and control objects of engines. According to proposed method, clean gas is supplied along main line into valve system of engine under dynamic operating conditions by externally mixing of gas and air in injection mixer at metering out of components by λ valve and control gate at higher loads. Delivery is carried out in pulse mode basing on value of first derivative of engine speed and by acting through proportional-internal-differential controller onto pulse-width modulator and two-position valve with solenoid drive.

EFFECT: enlarged capabilities of system under dynamically changing conditions.

1 dwg

The invention relates to engine and can be used in the control system of gas injection in an internal combustion engine

The invention relates to mechanical engineering, in particular to systems that supply gas of the internal combustion engine

The invention relates to engine, and in particular to systems for controlling the supply of fuel in internal combustion engines

The invention relates to systems input fuel for internal combustion engines

The invention relates to systems input fuel for internal combustion engines

FIELD: transport.

SUBSTANCE: invention relates to power plants designed to produce combustible gas mix from fuel to be fired in ICE. Proposed power plant comprises converter of power renewable source incorporated with transport facility. Said power converter is made up of small-size turbine mounted downstream of heat engine temperature decrease fan. Said small-size turbine drives DC generator. Generator output power is exploited in electrolyser. Combustible mix of oxygen and hydrogen is extracted in electrolyser. Said combustible mix is fed via controlled valve into carb.

EFFECT: fuel saving and reduced off-gas toxicity.

2 dwg

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