Limited supercharge pressure compressor system. RU patent 2520132.

FIELD: transport.

SUBSTANCE: invention relates to automotive industry and can be used in automotive engine driven compressor system. Compressor system (10) of vehicle (12) comprises compressor (16) driven by vehicle (12) engine (14). Said system comprises intake air guide (18) to force air pre-compressed by drive engine (14) turbosupercharger (20) to compressor (16). Said intake air guide (18) incorporates means (22) to flow section to construct supercharge pressure of pre-compressed air fed to compressor (16). Supercharge pressure maximum magnitude is set at idling subject to at least one of the following terms, i.e. compressor (16) oil outburst or compressor (16) power loss. Besides, invention covers the method of compressor system operation.

EFFECT: decreased power loss at idling.

15 cl, 9 dwg

The invention relates to the compressor system of a car containing driven him engine-driven compressor and guide the intake air for submission to the air compressor, previously compressed by the turbochargers of a drive motor.

In addition, the invention refers to the manner of operation of the compressor system of the car containing driven him engine-driven compressor and guide the intake air for submission to the air compressor, previously compressed by the turbochargers of a drive motor.

Vehicles running on compressed air systems, for example, pneumatic suspension or a pneumatic brakes, usually contain powered drive motor vehicle compressor for issuing the required compressed air. To increase the efficiency of his car drive motor is often equipped with a turbocharger. Driven engine-driven compressor in most cases is made in the form of suction surrounding air compressor. Compressor performance can significantly improve due to its turbocharging. This can be done, for example, by suction previously compressed air after turbocharger compressor and appropriate coolant nedovesov air. The result is achieved disproportionately to the increase of supplied air volume and increase efficiency by reducing losses flow through the system compressor suction. Another advantage is reduced oil consumption, which is determined mainly by the fact that in phase suction of air, as opposed to the traditional, intake ambient air compressor, in the cylinder there is no vacuum.

However, the lack of turboagregatov compressor is that mode grazing, i.e. in the phase of idling on which the compressor is not supplying compressed air to the power supply system of the car, it still takes a large air volume, resulting in operational condition occurs, a much bigger power loss than in the case of traditional, intake ambient air compressor.

The task of the invention consists in the creation of the compressor by which eliminated if this disadvantage, and at the same time, the consumption of oil compressor remained at a low level.

This problem can be solved by means of signs of independent claims.

The preferred embodiments of the invention described in dependent claims.

The invention is based on the generic compressor system so that guide the intake air are means of reducing the flow area of the stream by which limits the charge pressure supplied to the compressor, previously compressed air. Due to the location of means of reducing orifice flow in directing the intake air by emerging backup pressure arbitrarily reduce the boost pressure, supplied to the compressor. In particular, the charge pressure, supplied to the compressor, can be reduced to the phase of grazing or idling, so supplied air volume decreases in phase idling, which reduces the power consumption of the compressor. As a means of reducing orifice flow can be used, for example, the butterfly valve, gate valve, digaea in the guide intake air perpendicular to the direction of its flow, or installed with the possibility of rotation, drilled the ball, known, for example, from the ball valve.

Thus the preferred way provided that the means of reducing orifice flow mechanically activated from the work of the pneumatic cylinder. The use of the working cylinder for actuation means to reduce bore stream provides fast and accurate coordination of the open flow area of the stream directing the intake air and, thus, by agreeing caused the backup pressure is created for coordination of the compressor pressure control.

Especially it is preferable that the working cylinder contains a movable piston. The use of the working cylinder with a movable piston provide design is extremely robust, driven by pneumatic actuator with lever arbitrary length the length of the working cylinder.

Alternatively, may also provide that the working cylinder contains a flexible membrane. The use of flexible membrane instead of rolling piston provides, in particular, the shorter the response time of the working cylinder, because you have to travel less inertia mass. It is preferable, in particular, in the case of short phases of idling.

Ideally provides that work in pneumatic cylinder control pneumatic line is served charge pressure prevailing at laying down the stream by means of reduction of flow area of the stream. Direct feed into the working cylinder charge pressure, the ruling for lying downstream means of reducing orifice flow, ensures a self-consistent created charge pressure and open flow area of the stream. If the pressure is higher than the permissible, by control of the working cylinder through the mechanism of the open flow section of the flow decreases, resulting in reduced created the charge pressure. On the contrary, too low and created the charge pressure control work cylinder occurs to a lesser extent, resulting in an open area of passage of flow increases, resulting in a higher created the charge pressure. However, its maximum value cannot exceed the charge pressure, the ruling means before reduce orifice flow.

It can be envisaged that in a work of a pneumatic cylinder with relay valve is supplied working pressure, with pneumatic control input relay valve control pneumatic line is served charge pressure prevailing at laying down the stream by means of reduction of flow area of the stream. Use relay valve provides control of the working cylinder with pressure, the fluctuations of which is higher in comparison with pressure variations on stream for laying down the stream by means of reduction of flow area of the stream. Due to this, the working cylinder can be done more accurately.

A useful provided that the management pneumatic line is 3-way 2-way valve (3/2-distributor) with its own air release to disconnect the pressure in it. This dispenser allows to avoid the activation of the working cylinder. When the management pneumatic line off the pressure, created the maximum charge pressure of the compressor, as set in the guide intake air means of reducing orifice flow then create the minimum possible pressure.

The preferred way can be provided that the compressor system contains the electrically-controlled valve continuous action with pneumatic input for the supply pressure, electric managing entrance and pneumatic output for operation of the working cylinder, and charge pressure prevailing for lying down thread tools reduce the orifice thread, is registered by the pressure sensors, and compressor system also contains an electronic control unit that produces electrical control signal to the valve opening of continuous action depending on the identified charge pressure with a view to its limits. The use of electrically-controlled valve continuous action, which implies not discrete switching, providing a continuous transition between switching distributor in connection with located downstream for means of reducing orifice flow pressure sensor provides precise operation of the reduction of the flow area of the stream. Valve continuous operation can be made, in particular, in the form of proportional valve with non-linear characteristics of the flow, in the form of a control valve with linear characteristic of the bulk of the flow or in the form of a servo valve, i.e. in the form of similarly managed distributor. The use of pressure sensor avoids the use of untrained, pre-compressed turbocharger air for direct or indirect operation of means of reducing orifice flow. As previously compressed by the turbochargers air, in particular, has not yet dried used for actuation means to reduce orifice flow Pnevmostroimashina effectively protected from corrosion.

In this regard, it is also possible that the means of reducing orifice flow triggered by the electrically-controlled servo motor. Through the use of electrically controlled servo motor can also be prevented due to corrosion failure of pneumatic/mechanical actuators.

The next step would be, if the compressor system contains electrical control unit, produces electrical control signal to control electric controlled by a servomotor with the aim of charge pressure control, and the control signal is based on the charge pressure detected by the pressure sensor for laying down the stream by means of reduction of flow area of the stream. The use of electrical control unit with servo motor for operation of means of reducing the flow area provides a flexible coordination supplied to the compressor pressure control.

Generic way improved due to the fact that the charge pressure supplied to the compressor, previously compressed air is limited to a maximum value by triggering located in directing the intake air means to reduce bore. Thus, the advantages and features of the proposed compressor systems are also implemented in the framework of its use.

This also applies described below, especially preferred options of the proposed method.

Preferably he improved due to the fact that the maximum value is different depending on the operating conditions. Harmonization of maximum values supplied to the compressor pressure control with operational status of compressor system allows to optimize its operational behavior. For example, in phase idle power consumption of the compressor can be reduced by lowering created charge pressure, while at the stage of filing of the compressor system low frequency of rotation of the compressor creates maximum boost pressure to maximize supplied air volume. In addition, the phase of submission of the compression system can be set to the maximum charge pressure to restrict, in particular, thermal load compressor.

The preferred way provided that the maximum phase of idling is selected depending on at least one of the following values: a discharge of oil of the compressor and power loss of the compressor. To minimize the power loss of the compressor on the phase of idle time has to be the minimum possible pressure to the compressor. This created a pressure should ideally match the ambient pressure, resulting in a loss of capacity of the compressor would be identical to the loss of power intake ambient air compressor. However, at the same time a discharge of oil of the compressor should be minimal, with a discharge of oil to the compressor with the fall of the charge pressure increases due to the increase the vacuum in the piston chamber on the pump stage. Therefore preferably determination of the maximum allowable charge pressure depending on the allowable power loss phase idling and valid discharge of oil on the phase of idling.

Especially it is preferable that supplied to the compressor charge pressure is kept constant at the expense of dynamic coordination orifice flow, open the means to reduce it, when exceeding the set maximum value regardless of the frequency of rotation of the compressor and created by the turbocharger charge pressure. Dynamic negotiation supplied to the compressor pressure control, for example at the stage of idling, allows to support, in particular, the release of oil of the compressor at a constant low level.

The invention is illustrated with reference to the attached drawings on especially preferred variants of its realization. The drawings depict:

figure 1 - schematic car with the proposed compressor system;

figure 2 - lateral section of the guide intake air with the means to reduce orifice flow;

figure 3 - the first version of the guide intake air with the means to reduce orifice flow and joined the Executive device;

figure 4 - second version of the guide intake air with the means to reduce orifice flow and attached to the Executive device;

figure 5 is the third version of the guide intake air with the means to reduce orifice flow and joined the Executive device;

6 - the fourth option guide the intake air with the means to reduce orifice flow and joined the Executive device;

7 - the first possible flow section of the stream directing the intake air;

Fig - the second possible flow section of the stream directing the intake air;

figure 9 - a block diagram to illustrate the proposed method.

In the drawings the same or similar items are marked with the same reference positions.

1 schematically shows the car with the proposed compressor system. The vehicle contains 12 in addition to the compression system 10 drive motor 14, turbocharger 20, air filter 58 and 60 installation for preparation of the compressed air. Itself compressor system 10 includes the compressor is 16, the coupling to section 54 of the compressor 16 associated drive shaft 56 with a drive motor 14, from a drive motor 14 and located in guideline 18 intake air tools 22 reduce orifice flow. Guide 18 the intake air is associated with an anchor point, 62, so to 16 compressor air is supplied previously compressed by the turbochargers 20. The latter is driven as usual flue gases of a drive motor 14 and nourishes his pre-compressed air for combustion, and the surrounding air is drawn in through the air filter 58 and is compressed by the turbochargers 20. Part of a pre-compressed air branched from the anchor point 62 and guide 18 is supplied to the compressor 16, which, in turn, is driven by drive shaft 56 drive motor 14. The compressor is 16 advanced compacts previously compressed by the turbochargers 20 air and submits it to the installation of 60, which is known specialist follows prepares compressed air, i.e. clears it from oil and mud particles, and removes moisture. Created by the turbocharger 20 charge pressure varies depending on the volume of bringing into effect the flow of the EXHAUST gas of a drive motor 14. In the event of extremely high boost pressures to protect the compressor against thermal overload, the funds 22 reduce orifice flow guide 18 the intake air can create a variable pressure, so the compressor is 16 is served incomplete created by the turbocharger 20 charge pressure. Supplied to the compressor 16 charge pressure, starting with a certain set of values created by the turbocharger 20 charge pressure, can be held constant by means of 22 reduce bore. This, in particular, appropriate and when pneumoacupuncture car 12 (not shown) is full, i.e. at the moment, no additional compressed air. In this case the compressor 16 switches to phase idle, and he should then have a minimum energy while low in discharge of oil, i.e. submits together with the air of a small amount of oil. By reducing supplied to the compressor 16 charge pressure, i.e. by reducing orifice flow guide 18 the intake air, you can reduce supplied by compressor 16 on the stage bleed air volume, which results in reduction of power losses of compressor is 16. Still supplied to the compressor 16 charge pressure should be as close to the ambient pressure, so the power loss of the compressor 16 would correspond power losses intake ambient air compressor. However, since the release oil compressor increases with the vacuum in the piston chamber compressor pump stage, reducing supplied to the compressor 16 charge pressure to ambient pressure only conditionally rational. In order to continue to support low-emission oil compressor 16, it is served slightly increased compared to the surrounding pressure charge pressure, and power loss of the compressor 16 achieved slightly higher minimum. These steps are appropriate, in particular for short idling phases, during which compressed air is not available. If the phase idling compressor 16 lasts for longer time, the compressor 16 due to the coupling 54 can be completely disabled. In this state to zero fall supplied air volume compressor 16 and unwanted oil flow.

Figure 2 shows the lateral cross-section of the guide 18 the intake air with means of reducing orifice flow. The guide contains 18 inside funds 22 reduce the orifice thread, made in the form prescribed by 66 axis of rotation throttle 22. Flowing in the direction of 64 currents along the guide 18 pre-compressed air should flow around the throttle 22, and in the guide 18 occurs the back pressure. Caused throttle 22 the back pressure will depend on its angular position in relation to the direction 64 flow supplied pre-compressed air. Besides shown in figure 2, installed with the possibility of rotation axis 66 throttle 22 also possible digaea in the guide 18 predominantly at right angles to the direction 64 flow valve, which similarly creates in the guide 18 the back pressure. You can also use the installed with the possibility of rotation axis of the ball with the drilled aperture, this is known as a specialist, for example, in connection with ball valve.

Figure 3 shows the first version of the guide intake air with means of reducing orifice flow and joined the Executive device. Guide 18 figure 3 corresponds to guide figure 2, the direction of consideration rotated 90 degrees to the direction of consideration in figure 2, so the 66 axis of rotation lies in the plane of the drawing. Throttle 22 driven work pneumatic cylinder 26 with a movable piston 28 through rotating rod 68 and Converter device 70 (details not shown). The latter transforms the linear motion of the piston 28 in the working cylinder 26 in the rotational motion of the rod 68, resulting in intake of air into the working cylinder 26 and his release from it causes a rotation of the throttle 22 axis 66. Inside the cylinder is located 26 recoil 72, which determines the position of the piston 28, while of working cylinder 26 released the air. The air intake into the working cylinder 26 and its output are transmitted via the management pneumatic line 32, in which is located 3/2-distributor 36 with a private issue 38 air. Distributor 36 triggered by electrical line 74. Thus, managing the distributor 36 through electric lines 74 it is possible to influence the prevailing for laying down the stream throttle 22 charge pressure. If this effect, i.e., in particular, restriction of charge pressure for laying down the stream throttle 22, must be provided, the distributor 36 provides in its shows the switch position. In this state the slave cylinder 26 by the management pneumatic line 32 bound thread for throttle 22 guide 18 the intake air. So dominant for laying down the stream throttle 22 charge pressure may reject the piston 28 of its defined return spring 72 original position, resulting throttle 22 rotates on an axis 66. However, this changes the prevailing for laying down the stream throttle 22 charge pressure, so is feedback. If the impact on the charge pressure for laying down the stream throttle 22 it is undesirable, the distributor 36 can be transferred to its position switch (not shown), resulting from the working cylinder 26 through issue 38 is produced the air. Following this, the piston 28 returns to its defined return spring 72 original position. Instead of rolling in the working cylinder 26 piston 28 you can also use an elastic membrane, elastic deformation which is then converted via a suitable devices 70 into a rotary movement of the throttle 22.

Figure 4 shows the second option guide the intake air with means of reducing orifice flow and joined the Executive device. In contrast to the Executive device figure 3, the working cylinder 26 occurs through relay valve 34 with its own air vent. Relay valve has 34 control input 34', on which the management pneumatic line 32' served pressure. In the control pneumatic line 32' is also 3/2-distributor 36 with a private issue 38 air, triggered by an electric line 74. Relay valve 34 converts available about the control input 34' control of pressure in the form of increased pressure, so that the slave cylinder 26 may apply more pressure to trigger funds 22 reduce orifice flow. In addition, the working cylinder 26 no longer in contact with are not yet prepared compressed air, because the supply pressure relay valve 34 preferred way is collected downstream of the installation 60 figure 1.

On Fig depicted the second possible flow section of the stream directing the intake air. In this position throttle 22 part section of the guide 18 in the direction of the stream is closed throttle 22, so the initial section 24 of the stream is not identical cross section of the guide 18. In this case, the throttle 22 creates the back pressure, which cannot be neglected.

Figure 9 shows the block diagram to illustrate the proposed method. It begins at the stage of 100 in normal mode. Normal mode is called the phase of submission of compressor is 16 from figure 1, with or deactivated funds 22 reduce the orifice thread, or set the maximum charge pressure of compressor is 16 with the purpose of its protection against thermal overload. If then at the stage of 102 does not begin phase idling (102-Nein), the method continues with step 100. If the phase idling compressor (102-Ja), then at the stage 104 activates the Executive unit for means of influence on the initial section of a stream or, if it has been activated, is set to less, the maximum charge pressure. Further supplied to the compressor charge pressure through a loop control with feedback limited on stage 106. If then at the stage of 108 phase idling compressor is not the end (108-Nein), way lasts from the stage 106. If the idling phase completed (108-Ja), at the stage of 110 Executive device for influencing the flow area of the stream again deactivate, or reset first permitted in normal mode, the maximum charge pressure. After this method continues with step 100.

Signs disclosed in the description, the drawings and the claims that may be material to its implementation, either separately or in any combination.

The list of reference position

10 - piston system

14 - drive motor

16 - compressor

18 - guide the intake air

20 - turbocharger

22 - throttle

24 - flow section of the stream

26 - working pneumatic cylinder

28 - piston

32 - managing pneumonia

32' - managing pneumonia

34 - relay valve

34' - pneumatic control input

36 - 3/2-distributor

38 - air release

40 - valve continuous action

42 - pneumatic input for the supply pressure

44 - electric control input

46 - pneumatic output

48 - pressure sensor

50 - electronic control unit

52 - servo motor

54 - coupling

56 - the drive shaft

58 - air filter

60 - installation preparation compressed air

62 - anchor point

64 - direction

66 axis of rotation

68 - spinning rod

70 - unit Converter

72 - recoil

74 - electric line

76 - CAN-conclusion

100 - normal mode

102 - start phase idling?

104 - activate the Executive unit for the impact on the flow area

106 - limit charge pressure through the loop control with feedback

108 - end phase of idling?

110 - deactivate the Executive unit for the impact on the flow area

1. Compressor system (10) cars (12), containing powered drive motor (14) car (12) compressor (16) and the guide (18) intake air for submission to the compressor (16) air, previously compressed by the turbochargers (20) drive motor (14), and in the guide (18) intake air are funds (22) reduce bore (24) thread, made with the possibility of charge pressure control supplied to the compressor (16), previously compressed air, wherein the maximum charge pressure on the phase of idling is selected in according to at least one of the following values: - a discharge of oil compressor (16); - loss of capacity of the compressor (16).

2. The system of claim 1, wherein the means (22) reduce bore (24) flow constructed with possibility of mechanical response from the working cylinder (26).

3. The system of claim 2, characterized in that the working cylinder (26) contains a movable piston (28).

4. The system of claim 2, characterized in that the working cylinder (26) provides a flexible membrane.

5. The system on any of claim 2-4, wherein the work pneumatic cylinder (26) made with the possibility of submitting to him by the management pneumatic line (32) charge pressure, the ruling for laying down the flow of funds (22) reduce bore (24) thread.

6. The system on any of claim 2-4, wherein the work pneumatic cylinder (26) made with the possibility of filing it with relay valve (34) working pressure, with pneumatic control input (34') relay valve (34) made with the possibility of submitting to it by the management pneumatic line (32') charge pressure, the ruling for laying down the flow of funds (22) reduce bore (24) thread.

7. The system of claim 5, wherein the management pneumatic line (32; 32') is situated 3/2-distributor (36) with its own production (38) of air to disable pressure in it.

8. The system of claim 6, wherein the management pneumatic line (32; 32') is situated 3/2-distributor (36) with its own production (38) of air to disable pressure in it.

9. The system on any of claim 2-4, characterized in that it contains the electrically-controlled valve (40) continuous action with pneumatic input (42) for the supply of pressure, electric managing input (44) and pneumatic output (46) for the operation of the working cylinder (26)and charge pressure prevailing at laying down the flow of funds (22) reduce bore (24) thread, may be recorded by the sensor (48) pressure, with compressor system (10) also contains an electronic control unit (50), made with the possibility generating electric control signal to the valve opening (40) continuous action depending on the identified charge pressure for charge pressure control.

10. The system of claim 1, wherein the means (22) reduce bore (24) thread made with the possibility of operation from electrically controlled servo (52).

11. The system of claim 10, wherein it contains the electrical control unit (50), made with the possibility of the formation of the electric control signal to control electric controlled servo (52)to limit the charge pressure, and the control signal is based on the charge pressure detected by the sensor (48) pressure for laying down the flow of funds (22) reduce bore (24) thread.

12. The system for any of the paragraphs. 1-4, 7, 8, 10, 11, wherein it contains attached to the compressor (16) coupling (54), made with the possibility of complete isolation of the compressor (16) from the drive motor (14).

13. The method of operation of the compressor system (10) cars (12), containing powered drive motor (14) car (12) compressor (16) and the guide (18) intake air for submission to the compressor (16) air, previously compressed by the turbochargers (20) drive motor (14)and charge pressure supplied to the compressor (16), previously compressed air limit to set the maximum value by triggering located in the guide (18) intake air tools (22) reduce bore (24) flow, wherein the maximum value on the phase of idling choose according to at least one of the following values: - a discharge of oil compressor (16); - loss of capacity of the compressor (16).

14. The method according to item 13, wherein the maximum value of the chosen different ways depending on operational conditions.

15. The method according to item 13, wherein supplied to the compressor (16) charge pressure constant support at the expense of dynamic coordination bore (24) flow, open tools (22) decrease when exceeding the set maximum value regardless of the frequency of rotation of the compressor and created by the turbocharger (20) charge pressure.