Control method of gas engine and gas engine system

FIELD: engines and pumps.

SUBSTANCE: control method of gas engine system consists in supply of air through turbocharger, its mixing with fuel gas and supply of mixed gas to combustion chamber. Fuel gas flows through fuel gas supply line and its amount is controlled through fuel flow control valve. At low calorific value of fuel gas or high engine output power some portion of fuel gas is supplied to upstream fuel gas supply lines (30) relative to fuel flow control valve (20). Discharged fuel gas is supplied to combustion chamber through discharge control valve (33). The rest portion of fuel gas is supplied through the main gas supply line (26) and then to fuel flow control valve (20). Discharged fuel gas flow is set lower than the flow value of fuel gas on discharge side (26). At high calorific value of fuel gas or low output power of engine the discharge control valve (31) is closed to supply the fuel gas only to the main gas supply line (26). Branch line of discharge gas supply line (32), which is connected to combustion chamber, can be equipped with gas control valve (33). Also, the invention deals with gas engine system in which the above method is implemented.

EFFECT: control of gas engine is provided depending on calorific value of fuel gas and output power of engine, and spread of flow of potentially hazardous air-gas mixture is decreased.

6 cl, 2 dwg

 

The level of technology

The technical field to which the invention relates.

The present invention relates to a method of controlling a gas engine and a gas engine, while the engine is equipped with: a turbocharger or supercharger, through which air is supplied to the engine (hereinafter referred to in this application each time used the word "turbo", it can equally well be replaced by a "supercharger"); the first vasoregulation valve for controlling the flow of fuel gas supplied to each cylinder of the engine; a fuel gas, which is regulated by the first gas-regulating valve, and the air which is supplied through the turbocharger, mixed with formation of a given fuel / air mixture; and the engine burned supplied fuel gas according to the predetermined fuel / air mixture; and, in particular, this invention relates to a method of controlling a gas engine and a gas engine, allowing the control (regulation) of the fuel / air mixture with a high degree of accuracy, even when using fuel gas having a low calorific value, so that with high probability to vary its calorific value, or in the event of a significant change in the output power of the engine./p>

Description of the prior art,

Previously, gas engines, small gas engine, in particular, used the intake system with advanced turbocharger, in which fuel gas and air are mixed, in General, upstream relative to the turbocharger and then fed into the combustion chamber.

Meanwhile, in the most traditional of large gas engines fuel gas supplied to the combustion chamber by means of a control valve of the fuel gas, which is located directly in front of each of the cylinders, since the mixing ratio of the combustible mixture of fuel gas and air (i.e., the fuel / air mixture) and the gas filling must be uniform for each cylinder. When using this system the fuel / air mixture and a gas charge that can be injected in each cylinder, can be uniform, and work in each cylinder can become more efficient, and, additionally, due to this configuration, the fuel gas and air are mixed immediately before cylinder, flammable zone in the feed gas can be reduced, whereby it is possible to improve security.

Additionally, patent document 1 (the Japan patent No. 2001-132550) technology offers the combination of both systems are shown the above. In this technology, the fuel gas compressed by the gas compressor, is fed into the inlet of the cylinder in the intake channel or into the cylinder, while the fuel gas prior to compression by means of a gas compressor is supplied to the air channel upstream relative to the turbocharger, and fuel gas supply side of the cylinder, and the fuel gas side upstream relative to the turbocharger can be swapped.

However, in the configuration disclosed in patent document 1, it is necessary to compress the fuel gas to a pressure above the pressure of the supercharged air into the supply system of the fuel gas in which the fuel gas compressed by the gas compressor, is fed into the inlet of the cylinder inlet port or the cylinder, and a gas compressor must be large and a large amount to compress the gas having a low pressure and high flow, in the case of low-calorific gas (gas with low calorific value), such as mining methane as a fuel gas. Meanwhile, the supply system of the fuel gas in which the fuel gas before compression by means of a gas compressor is supplied to the air channel upstream relative to the turbocharger may cause a risk of explosion of the fuel gas in the exhaust outlet of the turbocharger used in the of namatala, because flammable fuel gas is compressed to high temperature and high pressure turbocharger.

Accordingly, patent document 2 (the Japan patent No. 2006-249954) discloses a configuration in which the fuel gas in one of the two systems is mixed with air in the inlet of the turbocharger to give to the thus obtained mixture in a turbocharger, while the fuel gas in another system is mixed with the intake air in the intake channel for each of the cylinders to apply the thus obtained mixture in a corresponding one of the cylinders, and a valve controlling the flow of fuel on the side of the turbocharger to regulate the flow of gas in the feed gas on the side of the turbocharger, valve controlling the flow of fuel to side of the cylinder for regulating the flow of gas in the feed gas on the side of the cylinder for each of the cylinders and the gas flow regulator to control the degree of opening of the valve controlling the flow of fuel on the side of the turbocharger to regulate the amount of fuel gas supplied to the gas supply channel on the side of the compressor, in order to preserve the density of the fuel gas in the mixture supplied to the turbocharger, equal to a value which does not exceed flammable limit tightly the th gas. In this configuration, the explosion of the fuel gas in the inlet of the turbocharger can be eliminated, and the drive power of the gas compressor for compressing the fuel gas fed into the intake channel for each of the cylinders can be reduced even in the case of using a gas with a low calorific value (gas having a low calorific value), whereby it is possible to reduce the size and volume of the gas compressor.

As stated above, due to the configuration disclosed in patent document 2, a sufficient amount of supply of the fuel gas can be achieved even with low-calorie gas, as well as the size and volume of a gas compressor for compressing the fuel gas can be reduced. However, we need a method of control in which the amount of fuel gas that must be mixed with air in the inlet of the turbocharger, can be properly managed by using a simple configuration, and which can be applied to a system in which the calorific value of the fuel gas varies.

The invention

Accordingly, the present invention was developed in view of the above problems inherent in the above-mentioned conventional technology, and therefore, the aim of the present invention is to provide a system of the gas engine and the way the control system of the gas engine, which allow control of air fuel with a high degree of accuracy even when using a fuel gas having a low calorific value and having a calorific value which varies with a high probability.

To this end, according to the present invention, a method of controlling the system of the gas engine in which the air supplied through the turbocharger, is mixed with fuel gas supplied through the supply line of the fuel gas, and regulate the relative flow rate through a valve controlling the flow of fuel to form a mixture, which is then fed into the combustion chamber for ignition and combustion engine, characterized in that it includes the stages at which, if the fuel gas has a low calorific value or the output power of the engine is high, placing a part of the fuel gas supplied through the supply line of the fuel gas, upstream relative to the valve controlling the flow of fuel, and the fuel gas side drainage set equal to the constant value that is lower than the value for the fuel gas side drainage, serves exhaust fuel gas into the combustion chamber through the control valve drain placed on the discharge line supplying fuel gas and having a two-position control,serves the remaining fuel gas from the supply line of the fuel gas through the main gas supply line and a valve controlling the flow of fuel to regulate the amount of fuel gas, to set the mixture supplied into the combustion chamber with a predetermined fuel / air mixture, and the stage at which, if the fuel gas has a high calorific value or the output power of the engine is low, close the control valve outlet to supply fuel gas only in the supply line to the gas.

When the configuration of the present invention, in which the fuel gas flows through the outlet of the gas supply lines, if the amount of supply of the fuel gas increases, i.e. if the fuel gas has a low calorific value or the output power of the engine is high, the regulation of the fuel / air mixture can be carried out with a high degree of accuracy, while provides the required amount of fuel gas.

Since the fuel gas and the air are mixed with each other immediately before the cylinder, the path of the mixed gas to the cylinder may be reduced to eliminate the risk of explosion and the like, whereby it is possible to ensure safety.

Additionally, the present invention differs in that hategului valve for controlling the flow of fuel gas is embedded in each of the branches of the outlet of the gas supply lines that are connected from the outlet of the gas supply lines with the corresponding chamber and the combustion engine, and, accordingly, in the event of a malfunction of one of the combustion chambers of the engine as the valve controlling the flow of fuel and vasoregulatory valve, which correspond to the respective combustion chamber, closed in a controlled manner to block the flowing fuel gas.

If any of the cylinders (combustion chambers) fails during operation of the gas engine, a valve controlling the flow of fuel and air regulating valve, drain, which correspond to the respective cylinder, is closed in order to stop working only cylinder that has failed, without stopping operation of the gas engine, whereby it is possible to stop the supply of fuel gas into the cylinder.

Additionally, the present invention differs in that the degree of opening of the valve controlling the flow of fuel determine at that time how to determine the power output of the engine to determine the case when the fuel gas has a low calorific value or the output power of the engine is high, if the valve controlling the flow of fuel is fully open, and the output power of the engine tends to increase, and accordingly, the control valve outlet is opened.

In this configuration can be easily and unambiguously determined whether or not the fuel gas supplied through the gas discharge line, whereby it is possible to adjust the fuel / air mixture with a high degree of accuracy.

In addition, the present invention is characterized by the fact that by determining the power output of the engine under the condition that the valve of the gas supply is opened is determined that the fuel gas has a high calorific value or the output power of the engine is reduced when the output power of the engine becomes not greater than a preset value, and, accordingly, the control valve outlet is closed.

Thus, the maximum threshold value of the fuel gas, which can be controlled through a valve controlling the flow of fuel gas, previously defined, and when the flow rate of the fuel gas becomes not greater than a predetermined value corresponding to the threshold value, the control valve outlet is closed so that the fuel gas is regulated only through the control valve of the fuel, whereby it is possible to adjust an air-fuel mixture with a high degree of accuracy by a simple method.

Additionally, according to the present invention, is provided a control device for a gas engine, comprising a valve controlling the flow of intake air to regulate the project for a quantity of intake air, served through the turbocharger and which must be filed in the combustion chamber, a valve controlling the flow of fuel provided to supply fuel for throttling the flow of fuel gas, which must be filed in the combustion chamber, and the device of fuel injection for mixing intake air and fuel gas in the mixture having the desired fuel / air mixture and for supplying the mixture in the combustion chamber, characterized in that the supply line of the fuel is diverted into the main gas supply line connected to the combustion chamber and the drain line feed gas which is diverted from the supply line of the fuel upstream relative to the control valve fuel flow, and a bypass line gas supply is equipped with a regulating valve, drain, which has a two-position control, to allow fuel gas to flow through him in an open condition with a flow rate that is less than the flow rate of the fuel gas flowing through the main supply line of the gas.

Additionally, the present invention is characterized by the fact that each of the branches of the outlet of the gas supply lines that are connected from the outlet of the gas supply lines with the respective combustion chambers, equipped with vasoregulation valve for controlling the flow of fuel gas.

As indicated the use, according to the present invention, can be provided by the engine system and method control system of the gas engine that allows adjustment of the fuel / air mixture with a high degree of accuracy, even when using fuel gas, which has a low calorific value and which likely varies its calorific value.

Thus, according to the present invention, the fuel gas flows through the discharge line gas supply, and through the branch outlet of the gas supply lines only if the amount of supply of the fuel gas increases, i.e. for example, if the fuel gas has a low calorific value or the output power of the engine is increased, whereby it is possible to adjust the fuel / air mixture with a high degree of accuracy while providing the required quantity of fuel gas.

According to the present invention as the mixture of fuel gas and air is directly in front of the cylinder, the path of the mixed gas in the cylinder can be reduced, and accordingly, the occurrence of the risk of explosion, etc. can be eliminated, whereby it is possible to ensure safety.

Additionally, during operation of the gas engine if any of the cylinders fails, it is upon regulation of fuel and the control valve outlet, which correspond to the respective cylinder, is closed in order to stop working, only the failed cylinder without stopping operation of the engine, whereby it is possible to stop the supply of fuel gas into the cylinder.

In addition, when the fuel gas is fed through the outlet supply line and the branch outlet of the gas supply lines, the fuel gas is fed at a certain prescribed flow rate, and, accordingly, you can simply adjust the fuel / air mixture in the valve controlling the flow of fuel.

Additionally, if the valve controlling the flow of fuel is fully open, while the output power of the engine tends to increase, the supply valve of the gas, respectively, is opened. The fact of whether or not the fuel gas through the outlet line of the gas supply and the branch outlet of the gas supply lines may be simply and unambiguously defined, whereby it is possible to adjust the fuel / air mixture with a high degree of accuracy.

Additionally, when the output power of the engine becomes not greater than a predetermined value, the control valve outlet is closed, whereby it is possible to adjust the fuel / air mixture with a high degree that is particular.

Brief description of drawings

Figure 1 is a view illustrating the entire configuration of the system of the gas engine in the embodiment of the present invention; and

figure 2 is an enlarged view of part of a bypass structure shown in figure 1.

Detailed description of the invention

Further, as an example, provides a detailed explanation of the preferred alternative implementation of the present invention with reference to the accompanying drawings. It should be noted that dimensions, materials, shapes, relative arrangement and the like of components described in this embodiment are merely examples and should not have the intention to limit the scope of the present invention, unless otherwise indicated.

Figure 1 is a view illustrating the entire configuration of the system of the gas engine in the embodiment of the present invention, and figure 2 is an enlarged view illustrating part of the bypass structure shown in figure 1.

It should be noted that further, as an example explanation of a gas engine equipped with a turbocharger and having an auxiliary chamber for ignition to actuate the generator. However, the configuration of this variant implementation should not be limited to this type of systems, gas engines, i.e. this variant implementation mozhetprimenyatsya to the gas internal combustion engines. Additionally, although it is shown that the generator is preferred as an object that must operate through the engine system, this option may not apply in cases other than the generator.

Referring to figure 1, provides a full explanation of the system configuration gas engine in this embodiment of the present invention.

This drawing shows an engine (gas engine) 1, cover 4 cylinder for each cylinder of the gas engine 1, the generator 13 is directly attached to and driven by the engine 1, the flywheel 14, the turbocharger 7, consisting of the exhaust turbine 7 and the compressor 7b, supply pipes 3 for supercharged air, United, respectively, with channels for intake air cap 4 cylinder for each cylinder, manifold 2 supercharged air, connecting the inlet channel to the intake air of the compressor 7b with the inlet pipe 3 for supercharged air cooler 9 intake air for cooling the intake air flowing through the manifold 2 supercharged air.

Additionally, it is shown the exhaust pipes 5 connected, respectively, with the output ports of the cylinder heads, exhaust manifold 6 is connected to the exhaust piping 5, the exhaust outlet pipe 110 to release exhaust gas from the exhaust output channel of the exhaust turbine 7a.

Also shows the exhaust bypass pipe 11, which is diverted from the exhaust manifold 6 on the inlet side of the exhaust turbine 7a bypassing the exhaust turbine 7a and is connected to the exhaust outlet pipe 110 on the output side of the exhaust turbine 7a and the exhaust bypass valve 12 to change the scope of the passage of the exhaust bypass pipe 11.

Additionally, shows the channel 10 of the reciever in the direction of the turbocharger for introducing outside air into the compressor 7b turbocharger 7, line 21 gas supply, in which fuel gas is introduced from a tank of fuel gas (not shown) to create a reserve of fuel gas, and which connects with the main line 26 of the gas supply and away from the intermediate part of the main line 26 of the gas flow in the branch 27 of the gas supply lines for the respective cylinders, which are connected, respectively, with the inlet pipe 3 for supercharged air.

Additionally, it is shown a gas compressor 18, is attached in line 21 of the gas supply at the cylinder, for compressing the fuel gas flowing through line 21 to the gas supply side of the cylinder, the valve 20 controlling the flow of fuel attached to each of the branches 27 of the gas supply lines to control the area of passage of each branch 27 of the gas supply lines, i.e. controlling the flow of toplin the gas.

A bypass line 30 of the gas supply, which branches off from line 21 of the gas flow is diverted upstream relative to the valve 20 controlling the flow of fuel because the gas flow and the gas flow flowing through the discharge pipe 30 of the gas supply, are set to be smaller than the flow and flow rate of gas flowing through the main line 26 of the gas supply.

Additionally, the sensor is shown 15 speed to determine the speed of rotation of the engine, the sensor 13A load to determine the load from the generator 13, in other words, the engine load, the pressure sensor 17 intake air for determining pressure of the intake air collector 2 supercharged air and the sensor 16 of the intake air temperature to determine the temperature of the intake air collector 2 supercharged air.

Also shows the controller 24 speed, the controller 23 of the mixture and the controller 22 of the gas flow. A specific value of the engine speed sensor 15 speed is delivered to the controller 24 speed, the controller 23 of the mixture and the controller 22 of the gas flow, and, optionally, a specific value of the engine load sensor 13A load is delivered to the controller 23 of the fuel / air mixture, and a certain value of the pressure intake air from the pressure sensor 17 of the ICA is " air is delivered to the controller 23 of the mixture and the controller 22 of the gas flow, while the specific value of the intake air temperature sensor 16, the temperature of the intake air is delivered to the controller 23 of the mixture and the controller 22 of the gas flow.

The controller 24 speed, which is usually an electronic regulator which has a capability to control the degree of opening of each valve 20 controlling the flow of fuel to the cylinder in order to adjust the engine speed to the desired speed, which is determined on the basis of the specific values of the engine speed sensor 15, an engine speed delivered from the sensor 15 of the engine speed.

The controller 23 of the fuel / air mixture controls the degree of opening of the exhaust bypass valve 12 with the use of the funds, which will be explained below, on the basis of the specific values of the engine speed sensor 15, an engine speed, a certain value of the engine load sensor 13A engine load, a certain value of the pressure intake air from the pressure sensor 17 intake air and a certain value of the intake air temperature sensor 16, the intake air temperature. The controller 22 of the gas flow controls the degree of opening of the valve 20 controlling the flow of fuel based on the specific values of the engine speed sensor 15, an engine speed, a certain value of the pressure intake air from the pressure sensor 17 intake air and a certain value of the intake air temperature sensor 16, the intake air temperature.

Explains the bypass structure for the fuel gas, which is the essential feature of this variant implementation, with reference to figure 2. As shown in this drawing, line 21 supplying the fuel gas branches, downstream relative to the gas compressor 18, but upstream relative to the valve 20 controlling the flow of fuel to the main line 26 supplying the fuel gas and the outlet line 30 of the supply of fuel gas.

The main line 26 supplying the fuel gas branches for the respective cylinders in the branch 27 of the gas supply lines, which are then connected with the respective inlet nozzles 3 for supercharged air.

Meanwhile, a bypass line 30 gas supply branches for the respective cylinders in junction 32 outlet of the gas supply lines, which are then connected with the respective inlet nozzles 3 for supercharged air. On the outlet line 30 of the gas supply is provided, above the point of junction 32 outlet of the gas supply lines, the valve 31 of the regulation of the outlet to control the flow of fuel gas in the outlet line 30 of the gas supply. The valve 31 to regulate the Finance drain has a two-position control to control the presence or absence of flow of the fuel gas, that is, when the valve 31 of the control tap is opened, the fuel gas flows through the outlet line 30 of the feed gas at a predetermined flow rate that is less than the flow in the main line 26 of the gas supply. Preferably, the gas flow in the outlet line 30 of the gas supply is set equal to 10-30%, and more preferably, approximately 20% of the gas flow in the main line 26 of the gas supply.

The valves 33 regulation of drainage embedded, respectively, in the junction 32 outlet of the gas supply lines. Each of the valves 33 regulation of allotment performs two-position control so as to act as a valve to control the presence or absence of flow of the fuel gas, and is maintained open, as a rule, when the fuel gas flows through the outlet line 30 of the gas supply.

During operation of the gas engine if any of the cylinders fails, the valve 20 controlling the flow of fuel and the valve 33 of the regulation of removal, which correspond to the respective cylinder are closed. Thus, the operation of one only of the failed cylinder is terminated without stopping operation of the engine, whereby it is possible to stop the supply of fuel gas into the cylinder.

Additionally, the diaphragm 35 is preferably provided on each of the branches 32 of the outlet of the gas supply lines, by means of the PTO which can properly regulate the flow of fuel gas, supplied to the corresponding cylinder of the branches 32 of the outlet of the gas supply lines.

During operation of the gas engine having the above configuration, the fuel gas from line 21 of the gas compressed by the gas compressor 18 and then is discharged in the middle of the line 21 of the gas supply. Additionally, one part of the exhaust fuel gas flows through the main line 26 of the gas supply and junction 27 of the gas supply lines for the respective cylinders, and then flows into the corresponding intake branch pipes 3, where it is added in the above mixture, which is then fed into the respective cylinders.

Additionally, another part of the exhaust fuel gas flows through the gas discharge line 30 when the valve 31 of the regulation of the outlet is open, and flows through the junction 32 outlet of the gas supply lines and supply pipes 3 for supercharged air in which it is mixed with the fuel gas, supplied from main line 26 of the feed gas mixture, which is then fed into the cylinder. It should be noted that hategului valve 33 is preferably maintained in a normal open state, i.e. it is preferably closed in a controlled manner as required if the cylinder fails, etc. However, it may be associated with valve 31 regulation resp is so, to be transferred in a controlled manner in the same mode as the mode valve 31 regulation of way.

Additionally, exhaust gas from the engine 1 flows through the exhaust pipe 5 so as to unite in the exhaust manifold 6, and then fed into the exhaust turbine 7a turbocharger 7 for actuating the exhaust turbine 7a before it will come out through the exhaust outlet pipe 110.

Additionally, when the exhaust valve 12 is opened in response to the signal control operations, which are described below, from the controller 23 of the fuel / air mixture, a part of exhaust gas in the exhaust manifold 6 is produced in the exhaust outlet pipe 110 to bypass the exhaust turbine 7a.

In the control method according to this variant implementation, if the fuel gas has a low calorific value or the output power of the engine is high, the valve 31 of the regulation of the outlet is open, and run as the fuel gas from the valve 20 controlling the flow of fuel, and the fuel gas from the valve 31 of the regulation-of-way. Meanwhile, if the fuel gas has a high calorific value or the output power of the engine is low, the valve 31 of the regulation of the outlet is closed, and accordingly, the fuel gas is supplied only from the valve 20 controlling the flow of fuel.

In particular, by determining the degree of opening of the valve 20 controlling the flow of fuel and power output of the engine valve 31 regulation of the outlet is opened in a controlled manner, if the degree of opening of the valve 20 controlling the flow of fuel becomes equal to 100% or around that value (the preset value), while the output power of the engine tends to increase. Then regulate the degree of opening through the valve 20 controlling the flow of fuel so as to adjust the amount of supply of fuel gas to obtain a predetermined fuel / air mixture, by adding a fuel gas having a number with a predefined composition and supplied from valve 31 regulation-of-way. Thus, when the valve 31 of the regulation of the outlet is open at 100%set value of the valve 20 controlling the flow of fuel falls below 100%.

Additionally, provided that the degree of opening of the valve 31 of the regulation of the allocation is supported by 100%, the flow rate of fuel gas is controlled by valve 20 controlling the flow of fuel in accordance with the output power of the engine. At this time, as described above, a predetermined flow of fuel gas from the valve 31 to regulate the deposits drainage and fuel gas consumption, controlled by valve 20 controlling the flow of fuel, are set so as to obtain a predetermined ratio of the components of the mixture or the fuel / air mixture relative to the air supplied from the turbocharger.

Additionally, the output power of the engine is determined under the condition that the valve 31 of the regulation of the outlet is open, and if the engine is not greater than a predetermined value, determines that the fuel gas has a high calorific value or the output power of the engine is reduced. Thus, the valve 31 of the regulation of the outlet is closed, and accordingly, the regulation of the fuel / air mixture occurs only through the control valve fuel consumption.

Thus, the maximum threshold value for the fuel gas, which may be regulated by valve 20 controlling the flow of fuel, determined in advance, and if the flow rate is not greater than a predetermined value, which corresponds to the maximum threshold value, the valve 31 to control the outlet is closed. Accordingly, the fuel gas is regulated only by the valve controlling the flow of fuel gas. Thus, the control (regulation) may assests shall be simply and with a high degree of accuracy. Additionally, even when a misfire occurs, the valve 31 of the regulation of the removal preferably is closed.

As described above, according to this variant implementation, only when the amount of supply of the fuel gas increases, for example, if the fuel gas has a low calorific value or the output power of the engine is increased, the fuel gas flows through the outlet line 30 of the gas supply and the junction 32 outlet of the gas supply lines, and, consequently, regulation of the fuel / air mixture can be performed with a high degree of accuracy, while provides the required amount of fuel gas.

Additionally, according to this variant implementation, as the mixture of fuel gas and air is directly in front of the cylinder, the path of the mixed gas in the cylinder can be reduced, and, accordingly, the risk of explosion, etc. can be eliminated, whereby it is possible to guarantee the security.

In addition, during operation of the gas engine if any of the cylinders fails, the valve 20 controlling the flow of fuel and the valve 33 of the regulation of removal, which correspond to the respective cylinder, is closed in order to stop working, only the failed cylinder without stopping operation of the engine, whereby maintnenace to stop the supply of fuel gas into the cylinder.

Additionally, since a fixed flow rate of the fuel gas is supplied when the fuel gas flows through the outlet line 30 of the gas supply and the branch 32 of the outlet of the gas supply lines, the regulation of the fuel / air mixture in the valve 20 of the fuel control can be carried out simply.

Additionally, by opening the valve of the gas supply when the valve 20 controlling the flow of fuel is opened to the degree of full opening, while the output power of the engine has a tendency to rise, the need or not of the fuel gas supplied through the outlet line 30 of the gas supply and the branch 32 of the outlet of the gas supply lines can be determined simply by which you can adjust the fuel / air mixture with a high degree of accuracy.

Additionally, by closing valve 31 regulation-of-way, when the output power of the engine becomes not greater than a predetermined value, which is set in advance, you can simply perform control with high degree of accuracy.

Industrial applicability

According to this variant implementation, the engine system, including both supply system of the fuel gas in which the fuel gas is mixed with the air inlet of the turbocharger, and thus on ucaima the mixture is fed into the turbocharger, and the supply system of the fuel gas in which the fuel gas is fed into the channels of the intake air to the respective cylinders, the possibility of explosion of the fuel gas at the outlet of the turbocharger can be completely eliminated, and the capacity of the gas compressor for compressing the fuel gas fed into the channels of the intake air to the respective cylinders may be reduced, if the fuel gas has a low calorific value, whereby it is possible to provide a gas engine having a gas compressor which is compact and which has a small volume.

1. The way the control system of the gas engine in which the air supplied through the turbocharger, is mixed with the fuel gas passing through the supply line of the fuel gas, and regulate the number of fuel through the control valve fuel consumption, and thus obtained mixed gas fed into the combustion chamber to effect the ignition and combustion in the engine, characterized in that the method comprises steps, in which, when the fuel gas has a low calorific value or the output power of the engine is high, part of the fuel gas is directed to a supply line of the fuel gas upstream relative to the valve controlling the flow fuel, pricematched exhaust fuel gas is set to a constant value, which is less than the value of the fuel gas side drainage, serves exhaust fuel gas into the combustion chamber through the control valve drain placed at the outlet of the gas supply lines and having a two-position control, and serve the remaining part of the fuel gas through the main supply line gas supply line of the fuel gas and then into the valve controlling the flow of fuel for controlling the amount of fuel gas with the establishment of the mixed gas to be filing for combustion is equal to the pre-set fuel / air mixture, and the stages at which, if the fuel gas has a high calorific value or the output power of the engine is low, the control valve outlet is closed for supplying the fuel gas to the main gas supply line.

2. The method of controlling the engine system according to claim 1, characterized in that provide hategului valve for controlling the flow of fuel gas, built-in branch outlet of the gas supply lines connected from the outlet of the gas supply lines with each of the combustion chambers of the engine, and if any of the combustion chambers of the engine fails, the valve controlling the flow of fuel and vasoregulatory valve corresponding to the respective combustion chamber, closed to overlap p is kodine fuel gas.

3. The method of controlling the engine system according to claim 1, characterized in that determine the degree of opening of the control valve fuel consumption and power output of the engine, when it determines that the fuel gas has a low calorific value or the output power of the engine is high, if the degree of opening of the valve controlling the flow of fuel is in the fully open state, while the output power of the engine tends to increase, and accordingly, the control valve outlet is open.

4. The method of controlling the engine system according to claim 1, characterized in that the output power of the engine is determined under the condition that the valve of the gas supply is opened, and determines that the fuel gas has a high calorific value or the output power of the engine is reduced if the power output of the engine becomes not higher than a predefined value, and accordingly, the control valve outlet is closed.

5. Gas engine, containing a valve of the intake air to control the amount of air supplied to the combustion chamber through the turbocharger, valve controlling the flow of fuel provided to supply fuel for throttling the flow of fuel gas fed into the combustion chamber, and the device of fuel injection on the I mixing of air and fuel gas at a predetermined fuel / air mixture with the to give to the thus obtained mixed gas in the combustion chamber, characterized in that the supply line of the fuel is branched into the main gas supply line connected to the combustion chamber, and the outlet line of the gas supply off located upstream side of the valve controlling the flow of fuel, and a bypass line gas supply is equipped with a control valve outlet with an on / off regulation to allow the passage of fuel gas through it with a flow rate that is less than the flow rate of the fuel gas passing through the main gas supply line is open.

6. System of a gas engine according to claim 5, characterized in that the branch outlet of the gas supply lines connected from the outlet of the gas supply lines with each of the combustion chambers, equipped with vasoregulation valve for controlling the flow of fuel gas.



 

Same patents:

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

Gas engine // 2369754

FIELD: engines and pumps.

SUBSTANCE: invention relates to engine production, particularly to ICE fuel systems. Proposed engine uses fuel gas mix and ignition initiator, and comprises fuel feed system. Liquefied or compressed gas is fed into aforesaid system from one tank, while liquefied or compressed ignition initiator is fed from another ignition tank for them to be mixed therein to produce liquefied or compressed mixed fuel. Engine incorporates also injector to feed fuel into combustion chamber. Fuel fed into engine injector comprises aforesaid mix. Fuel injector assembly comprises injector proper and separate fuel-mixing assembly. First fuel component is fed in the said mixing unit in the form of liquefied or compressed gas from one tank and second fuel component in the form of ignition initiator is fed from another tank. Aforesaid mixing assembly mixes the fist and second fuel components and feeds mixed fuel into injector. Note that both fuel components are fed through common fuel channel wherein they are mixed up prior to feeding into combustion chamber.

EFFECT: higher efficiency, reduced pollution.

21 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: invention refers to LNG-powered internal combustion engines. Fuel-feed turbine pump assembly to LNG-powered internal combustion engine comprises a shaft-mounted air compressor wheel, a fuel pump impeller, a turbine with an engine disk provided in a housing of the turbine pump assembly and a gas generator with its case being coaxial with the turbine. A starter is attached to the shaft of the turbine pump assembly, while outlets of the air compressor wheel and the fuel pump are connected to the gas generator. At the outlet of the fuel pump, there is an exchanger-gasifier. At the outlet of the fuel pump, a receiver is fixed. At the outlet of the fuel pump, in front of the gas generator, there is a fuel-flow controller.

EFFECT: invention provides increasing efficiency of the turbine pump assembly.

5 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly, to cryogenic fuel feed systems of power generation plants. Heat exchanger-gasifier (2) gasifies partially the fuel at constant pressure. Adiabatic steam-generation device, i.e. throttle or Laval nozzle (3) reduces pressure and temperature of produced two-phase mix. Separator (4) isolates cooled liquid phase while booster pump (8) forces it back into fuel tank (1). Compressor (5) forces gas phase into power generation plant (7). Proposed invention compensate heat influx from ambient atmosphere to cryogenic fuel by cooling it in adiabatic steam generation device (3) and expands the system performances since the latter possesses no heat inertia, the gasification proceeding intensively in the entire liquid volume directly in flow.

EFFECT: compensation of heat influx to cryogenic fuel from ambient atmosphere.

4 dwg

FIELD: engines and pumps.

SUBSTANCE: invention allows producing a reliable and safe electromechanical injector with a minimised wear of moving parts, particularly, a mechanical element, a sealing element and feed line. The automotive internal combustion engine fuel feed electromechanical injector incorporates an electromagnetic actuator acting on a disk-like mechanical shut-off element intended for opening or closing the gas fuel passage from the feed line in delivery line communicating with the outlet. There is a sealing element arranged between the delivery line and aforesaid shut-off element, the sealing element being attached to the said shut-off element and moving together with it. The sealing element is furnished with a recess arranged on its end to interact with the delivery line end in the injector idle condition. The said end represents a taper-shape element. The truncated cone sealing element thrusts by its narrowing end upon the delivery line end in the injector idle condition and with the feed line blocked by the shut-off element. The elastomer material sealing element is fitted in a seat provided in the end face or the shut-off first end face facing the delivery line.

EFFECT: higher efficiency.

17 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: device for supply of gaseous fuel to an internal combustion engine of a vehicle contains gas tank connected via a pipeline to a reducer, and sleeve, installed on the gas tank and connecting the pipeline to the tank. The device is equipped with an electro magnetic valve of fuel, assembled on the pipeline and electrically connected to a temperature sensor, attached to the engine; and the device is also equipped with an additional pipeline and a sleeve communicating the gas tank with the electro magnetic valve of fuel. The additional sleeve is mounted in the upper portion of the gas tank.

EFFECT: start of a vehicle engine by means of gas application is achieved in cold seasons of a year.

1 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to supply systems of internal combustion engines with heating of air and fuel. Proposed system for heating air and gas delivered into internal combustion engine has housing, reducer, heater, pipelines, electric gas valve, glow plug, temperature sensors, gas amount controller and control unit. Heater is furnished with ignition system. Reducer and heater are arranged in housing provided with one outlet and two inlet branch pipes, one of which serves to take in cold air, and the other receives heated air flowing around exhaust manifold of engine. Gate installed in housing in place of connection of two inlet branch pipes provides complete or partial closing of one or other inlet branch pipe when being turned by signal from temperature sensor and control unit. Output branch pipe opens in hood space directly near inlet branch pipe through which air gets into engines.

EFFECT: improved heating of air and gas.

4 cl, 1 dwg

Fuel system // 2295054

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to system delivering fuel and fuel-gas mixture into internal combustion engines. Proposed system contains devices delivering diesel fuel into, devices delivering liquefied gas simultaneously with delivery of diesel fuel into engine. Devices for delivering liquefied gas include nozzle to inject liquefied gas into engine and nozzle controls, and also devices for cooling liquefied gas so that evaporation of liquefied gas delivered into nozzle is prevented and no gas bubbles are formed. Nozzle for injecting liquefied gas into engine has nozzle body, channel made in nozzle body provided with seat of shutoff needle defining the hole, shutoff needle arranged in channel and designed for closing hole in seat and installed for displacement from seat of shutoff needle to open the hole and provide possibility of passing of liquefied gas for injection by nozzle, devices for shifting shutoff needle from position far from seat of shutoff needle to position in which shutoff needle is pressed to and back for selective opening and closing of nozzle, and nozzle hole communicating with channel to provide passing of liquefied gas into nozzle body through hole and into channel in direction cross to shutoff needle. Passage in nozzle body is directed from channel to upper part of nozzle body to provide displacement of bubbles from area near hole through channel and into upper part of nozzle body. Other design versions of system and nozzle are presented in claims 14, 15, 19, 26, 29, 34, 38.

EFFECT: reduced consumption and cost of fuel.

45 cl, 8 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: proposed device for delivering natural gas with external mixing into engine consists of controlled electromagnetic valves, reducer, distributing unit, mixing unit with two inputs, one output and ejector. Device contains also pipelines connecting reducer with controlled electromagnetic valves and connecting distributing unit with engine intake manifold. Mixing unit with ejector is made in form of assembly of mixers, number of mixers being equal to number of engine cylinders. Mixer assembly is installed in placed of connection of engine and intake manifold as attachment member. Reducer is connected with inputs of mixers of mixer assembly by means of by pipelines radially arranged and getting out of reducer outlet hole, other ends of said pipelines being connected with controlled electromagnetic valves whose number is equal to number of engine cylinders.

EFFECT: increased engine power.

1 dwg

FIELD: mechanical engineering; diesel engines.

SUBSTANCE: proposed fuel system of diesel engine designed for operation on dimethyl ether contains service cylinder connected through liquid phase take-off valve to input of fuel feed pump whose output is coupled with liquid phase supply space of high-pressure pump whose cutoff space is connected through spring-loaded valve to service cylinder by means of vapor phase valve. Overplunger space of high-pressure pump is connected with nozzle of diesel engine combustion chamber through delivery valve and high-pressure fuel line. Delivery valve of high-pressure pump is made in form of double-acting valve consisting of main and return valves. Main valve is connected to nozzle by high-pressure fuel line, and return valve is coupled with overplunger space of high-pressure pump. Each valve is provided with spring and is arranged in corresponding housing. Valves are installed relative to each other for relative contact and displacement either together or separately. Main valve is provided with jet which can be overlapped from side of return valve at contacting of valves, and main parameters of double-acting valve are defined by following relations: where dj is diameter of jet of main valve; drv is diameter of return valve, δrv is stiffness of spring of return valve; δ is stiffness of spring of main valve; Frv is preload of spring of return valve; F is preload of spring of main valve.

EFFECT: elimination of steam plugs and uncontrollable injections.

4 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

The invention relates to the field of engine development and is intended for use in gas and diesel engines for cars, tractors, stationary installations

The invention relates to systems for regulating the gas supply to the cylinders of the engine

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

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