CN112664356A - Gas engine branch air inlet control device and control method thereof - Google Patents
Gas engine branch air inlet control device and control method thereof Download PDFInfo
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention discloses a gas engine shunt air inlet control device and a control method thereof, wherein the gas engine shunt air inlet control device comprises an engine ECU, and the engine ECU controls a gas throttle valve and an air throttle valve to realize the control of the air-fuel ratio of an engine; controlling a gas bypass valve to realize the control of gas supercharging pressure; controlling an air bypass valve to realize control of air supercharging pressure; controlling a gas throttle valve and an air throttle valve to realize the control of the rotating speed and the output power of the engine; the single-cylinder regulating valve is controlled to realize the air inlet uniformity and combustion protection of each cylinder; the invention can well solve the application problem of the gas engine in the field of high hydrogen content, and greatly improves the safety and reliability of the engine.
Description
Technical Field
The invention relates to the technical field of gas engine control, in particular to a gas engine shunt air inlet control device and a control method thereof.
Background
The air intake mode of a gas engine can be generally distinguished according to the mixing mode of gas and air, such as: a premixed intake type, an in-cylinder mixed intake type. The premixed air intake mode refers to mixing before entering an engine cylinder; the in-cylinder mixed air intake type is that fuel gas and air are independently fed and are mixed in an engine cylinder. The premixed air inlet type is characterized by long mixing time, full mixing of gas and air and a certain amount of mixed gas stored in an air inlet manifold; the cylinder mixed air inlet type is characterized by short mixing time, poor mixing of gas and air, and higher dynamic response.
With the continuous development and popularization of gas engines in the fields of distributed power generation and vehicles, the control technology of the engines is continuously upgraded and developed, particularly the control technology of gas premixing air inlet engines is very mature, and the bypass air inlet engines are generally provided with a multi-point electronic injection control solution, but the electric injection valves have extremely high requirements on the quality of air sources and are only suitable for the field of natural gas.
In order to respond to the national call for energy conservation and emission reduction, the gas engine is greatly popularized in multiple fields of natural gas, methane, gas and the like, and the control technology of the gas engine is gradually mature and perfect; in the field of gas sources with high hydrogen content such as industrial tail gas, biomass gas, pyrolysis gas and the like, no mature high-power engine solution exists at present, and the conventional gas engine cannot normally operate due to the fact that the gas sources are complex in components and are very easy to flash explosion. Therefore, the core for restricting the popularization of the gas engine in the field is that the air inlet system and the control device of the engine cannot meet the requirement of an air source. In order to deal with the characteristic that the gas source is easy to explode, the gas engine needs to adopt a branch gas inlet structure to prevent a large amount of mixed gas from being stored in a gas inlet manifold and avoid causing serious explosion of a gas inlet system.
In summary, in the application of the bypass air intake type engine in the fields of industrial tail gas, biomass gas, pyrolysis gas and the like, the engine is easy to knock.
Disclosure of Invention
The invention aims to solve the problems and provides a shunt gas inlet control device and a control method thereof for a gas engine, which improve the safety and reliability of the gas engine in the field of industrial tail gas, biomass gas, pyrolysis gas and other gases.
In order to achieve the purpose, the invention adopts the following technical scheme:
the shunt air inlet control device of the gas engine comprises a gas inlet, a solenoid valve, a gas pressure regulating valve, a gas inlet valve, a gas outlet valve, a gas inlet valve; the outlet of the gas pressure regulating valve is communicated with a gas throttle valve; the outlet of the gas throttle valve is respectively communicated with a gas bypass valve and a gas inlet of a gas supercharger; the gas outlet of the gas supercharger is communicated with a gas intercooler, the gas outlets of the gas intercooler and the gas bypass valve are communicated with a gas throttle, the outlet of the throttle is communicated with a gas engine gas inlet manifold, each gas outlet of the engine gas inlet manifold is communicated with a single-cylinder regulating valve, and the gas outlet of the single-cylinder regulating valve is communicated with an engine cylinder;
the air inlet is communicated with an air filter, the air outlet of the air filter is respectively communicated with an air bypass valve and an air supercharger, and the air outlet of the air supercharger is communicated with an air intercooler; the air bypass valve and the air intercooler air outlet are communicated with an air throttle valve, and the air throttle valve is communicated with an engine cylinder through an engine air inlet manifold;
the gas pressurization valve and the air pressurization valve are respectively used for controlling the pressurization pressure of the gas and the air intake manifold of the engine;
after the engine is started, fuel gas enters the pressure regulating valve through the fuel gas electromagnetic valve, the fuel gas is subjected to pressure stabilizing regulation through the pressure regulating valve and then is output to the fuel gas throttle valve, the fuel gas enters the fuel gas supercharger through the fuel gas throttle valve and then is cooled through the fuel gas intercooler, the input end of the fuel gas bypass valve is connected to the rear of the fuel gas throttle valve, and the output end of the fuel gas bypass valve is connected to the rear of the fuel gas intercooler through a steel pipe. The gas flows into the engine cylinder through the gas intercooler, the gas throttle valve and the single-cylinder regulating valve and is mixed with the air;
after the engine is started, air is filtered by the air filter, enters the air supercharger through the air throttle valve and is cooled by the air intercooler, the input end of the air bypass valve is connected to the rear of the air throttle valve, and the output end of the air bypass valve is connected to the rear of the air intercooler through the steel pipe, so that a bypass control loop of the air supercharger is formed. Air flows into an engine cylinder through an air intercooler, an air throttle valve and an air inlet manifold of each cylinder, and is mixed with fuel gas;
the engine ECU is electrically connected with the gas throttle valve, the gas bypass valve, the gas throttle valve, the single-cylinder regulating valve, the air throttle valve, the air bypass valve and the air throttle valve respectively; the engine ECU establishes a PID closed-loop control algorithm according to the combustion feedback state of the engine, and controls a gas throttle valve and an air throttle valve so as to realize electronic regulation of the air-fuel ratio of the engine; the engine ECU establishes a closed-loop control algorithm according to the front-back pressure difference of the gas throttle valve, and controls the gas bypass valve to realize the control of the gas supercharging pressure; the engine ECU establishes a closed-loop control algorithm according to the front-back pressure difference of the air throttle valve, and controls the air bypass valve to realize the control of the air supercharging pressure; the engine ECU establishes a PID closed-loop control algorithm according to the engine rotating speed or power signal, and controls a gas throttle valve and an air throttle valve simultaneously so as to realize the control of the engine rotating speed and the output power; the engine ECU establishes a closed-loop control algorithm according to the combustion feedback state of each cylinder of the engine, and controls the single-cylinder regulating valve so as to realize the control of the air inlet uniformity and the combustion protection of each cylinder.
In the gas engine bypass air inlet control device, the control signal types of a gas throttle valve, a gas bypass valve, a single-cylinder regulating valve, an air throttle valve, an air bypass valve and an air throttle valve are 4-20 mA.
In the gas engine shunt gas inlet control device, the single cylinder regulating valve adopts a 4-20 mA driven position type electric regulating valve.
A gas engine branch air inlet control method is used for controlling a gas engine by applying the gas engine branch air inlet control device.
The beneficial effects produced by adopting the invention are as follows:
1. compared with a premixing air inlet type control device: in the application field of industrial tail gas, biomass gas and pyrolysis gas, because the hydrogen content of a gas source is higher, if a premixed gas inlet type structure is adopted, because a large amount of mixed gas exists in a gas inlet pipe, serious deflagration is easy to occur; and adopt the formula structure of admitting air along separate routes, the intake pipe does not have the gas mixture, even take place detonation in the engine cylinder, also very easy control can not cause serious detonation, can promote gas engine's reliability by a wide margin.
2. Compared with the prior multipoint electric spraying control device: the electric injection valve of the multipoint electronic injection control device has extremely high requirements on the pressure and the components of a gas source, is usually only used in the field of natural gas and has larger limitation. The shunt gas inlet control device can be suitable for various fuel gases, and has extremely high safety and reliability.
3. In the field of fuel gas with high hydrogen content, the invention has the following great advantages: each cylinder is provided with a single-cylinder regulating valve, so that not only can the balanced control of combustion of each cylinder be realized, but also the protection control of each cylinder can be quickly realized, and the running reliability of the engine is greatly improved.
Drawings
Fig. 1 is a schematic view of the structural principle of the present invention.
Description of reference numerals: 1-gas electromagnetic valve, 2-gas pressure regulating valve, 3-gas throttle valve, 4-gas bypass valve, 5-gas supercharger, 6-gas intercooler, 7-gas throttle valve, 8-single cylinder regulating valve, 9-air filter, 10-air throttle valve, 11-air bypass valve, 12-air supercharger, 13-air intercooler, 14-air throttle valve, 15-engine cylinder and 16-engine ECU.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the invention designs a brand new branch intake control structure for adapting to the field of high hydrogen-containing gas. Based on the control structure and the control method described by the invention, the application problem of the gas engine in the field of high hydrogen content can be well solved, and the safety and the reliability of the engine are greatly improved.
The invention provides a shunt air inlet control device of a gas engine, which comprises a gas electromagnetic valve 1, a gas pressure regulating valve 2, a gas throttle valve 3, a gas bypass valve 4, a gas supercharger 5, a gas intercooler 6, a gas throttle valve 7, a single cylinder regulating valve 8, an air filter 9, an air throttle valve 10, an air bypass valve 11, an air supercharger 12, an air intercooler 13, an air throttle valve 14, an engine cylinder 15 and an engine ECU16, wherein the gas electromagnetic valve 1 is connected with the gas electromagnetic valve 2;
the method is characterized in that: the electric valve is communicated with the driving motor through a pipeline and comprises a valve body and a driving motor, wherein the valve body is a butterfly valve which is communicated with the driving motor through a coupling;
the electric valve comprises a gas throttle valve 3, an air throttle valve 10, a gas bypass valve 4 and an air bypass valve 11;
the gas inlet is communicated with an electromagnetic valve 1, the outlet of the gas electromagnetic valve 1 is communicated with a gas pressure regulating valve 2 through a pipeline steel pipe, and the gas passes through the gas electromagnetic valve 1 and then is subjected to pressure stabilizing regulation through the gas pressure regulating valve 2; the outlet of the gas pressure regulating valve 2 is communicated with a gas throttle valve 3; the outlet of the gas throttle valve 3 is respectively communicated with a gas bypass valve 4 and a gas inlet of a gas supercharger 5; the gas outlet of the gas supercharger 5 is communicated with a gas intercooler 6, the gas outlets of the gas intercooler 6 and the gas bypass valve 4 are communicated with a gas throttle valve 7, the outlet of the throttle valve 7 is communicated with a gas engine gas inlet manifold, each gas outlet of the engine gas inlet manifold is communicated with a single-cylinder regulating valve 8, and the gas outlet of the single-cylinder regulating valve 8 is communicated with an engine cylinder 15;
the air inlet is communicated with an air filter 9, the air outlet of the air filter 9 is respectively communicated with an air bypass valve 11 and an air supercharger 12, and the air outlet of the air supercharger 12 is communicated with an air intercooler 13; the air outlets of the air bypass valve 11 and the air intercooler 13 are communicated with an air throttle valve 14, and the air throttle valve 14 is communicated with an engine cylinder 15 through an engine air inlet manifold;
the gas booster valve 5 and the air booster valve 12 are respectively used for controlling the boosting pressure of the gas and the air intake manifold of the engine;
after the engine is started, fuel gas enters the pressure regulating valve 2 through the fuel gas electromagnetic valve 1, the fuel gas is subjected to pressure stabilizing regulation through the pressure regulating valve 2 and then is output to the fuel gas throttle valve 3, the fuel gas enters the fuel gas supercharger 5 through the fuel gas throttle valve 3 and then is cooled through the fuel gas intercooler 6, the input end of the fuel gas bypass valve 4 is connected to the rear of the fuel gas throttle valve 3, and the output end of the fuel gas bypass valve is connected to the rear of the fuel gas intercooler 6 through a steel pipe to form. The gas passes through a gas intercooler 6, then a gas throttle valve 7 and finally a single-cylinder regulating valve 8 and flows into an engine cylinder 15 to be mixed with air;
after the engine is started, air is filtered by an air filter 9, enters an air supercharger 12 through an air throttle valve 10, is cooled by an air intercooler 13, the input end of an air bypass valve 11 is connected to the rear of the air throttle valve 10, and the output end of the air bypass valve is connected to the rear of the air intercooler 13 through a steel pipe, so that a bypass control loop of the air supercharger 12 is formed. Air flows into an engine cylinder 15 through an air intercooler 13, an air throttle valve 14 and an air inlet manifold of each cylinder, and is mixed with fuel gas;
the gas-fired engine comprises an engine ECU16, wherein the engine ECU16 is electrically connected with a gas throttle valve 3, a gas bypass valve 4, a gas throttle valve 7, a single-cylinder regulating valve 8, an air throttle valve 10, an air bypass valve 11 and an air throttle valve 14 respectively; the engine ECU16 establishes a PID closed-loop control algorithm according to the combustion feedback state of the engine, and controls the gas throttle valve 3 and the air throttle valve 10 to realize electronic regulation of the air-fuel ratio of the engine; the engine ECU16 establishes a closed-loop control algorithm according to the front-back pressure difference of the gas throttle valve, and controls the gas bypass valve 4 to realize the control of the gas supercharging pressure; the engine ECU16 establishes a closed-loop control algorithm according to the pressure difference between the front and the rear of the air throttle valve, and controls the air bypass valve 11 to realize the control of the air supercharging pressure; the engine ECU16 establishes a PID closed-loop control algorithm according to the engine speed or power signal, and controls the gas throttle valve 7 and the air throttle valve 14 at the same time to realize the control of the engine speed and the output power; the engine ECU16 establishes a closed-loop control algorithm according to the combustion feedback state of each cylinder of the engine, and controls the single-cylinder regulating valve 8 to realize the control of the air inlet uniformity and the combustion protection of each cylinder.
Wherein, the gas throttle valve 3 and the air throttle valve 10 are used for controlling the air-fuel ratio of the engine; the gas bypass valve 4 and the air bypass valve 11 are used for controlling the boost pressure of an engine intake manifold; the gas throttle valve 7 and the air throttle valve 14 are used for controlling the speed regulation of the engine; the single cylinder regulating valve 8 is used for engine combustion protection and air inlet uniformity control.
The engine ECU16 is an engine control core component, integrates signal acquisition, function design and protection design, and can realize the functions of engine speed regulation control, air-fuel ratio control, supercharging pressure control and the like.
The gas electromagnetic valve 1 is connected with the gas pressure regulating valve 2 through a steel pipe, and gas passes through the gas electromagnetic valve 1 and then is regulated in a pressure stabilizing mode through the gas pressure regulating valve 2.
The gas throttle valve 3 is arranged behind the gas pressure regulating valve 2 and consists of a butterfly valve and a driving motor, the type of a control signal of the gas throttle valve 3 is 4-20 mA, and the engine ECU16 controls the gas throttle valve 3 based on an air-fuel ratio closed-loop control algorithm to realize the adjustment of the air-fuel ratio.
The gas booster 5 is composed of a turbine and a gas compressor, the gas compressor is arranged behind the gas throttle valve 3, the gas intercooler 6 is arranged behind the gas compressor of the gas booster 5, and the gas bypass valve 4 is arranged in parallel with the gas booster 5 and the gas intercooler 6. The type of the control signal of the gas bypass valve 4 is 4-20 mA, and the engine ECU16 controls the gas bypass valve 4 based on a gas supercharging pressure closed-loop control algorithm to realize the control of the gas supercharging pressure.
The gas throttle valve 7 is arranged behind the gas intercooler 6, the control signal type of the gas throttle valve 7 is PWM, and the engine ECU drives the gas throttle valve 7 based on a speed and power closed-loop control algorithm to realize rotation speed and power control.
The single cylinder regulating valve 8 is arranged behind the gas throttle valve 7 and at the front end of the engine cylinder 15, the type of a control signal of the single cylinder regulating valve 8 is 4-20 mA, and the engine ECU16 adjusts the single cylinder regulating valve of each cylinder in real time based on the combustion state of each cylinder so as to realize balance control and protection control of single cylinder combustion.
The air filter 9 is arranged at the front end of the air throttle valve 10, the air throttle valve 10 is composed of a butterfly valve and a driving motor, the type of a control signal of the air throttle valve 10 is 4-20 mA, and the engine ECU16 controls the air throttle valve 10 based on an air-fuel ratio closed-loop control algorithm to realize the adjustment of the air-fuel ratio.
The air supercharger 12 consists of a turbine and a compressor, the compressor of the air supercharger is arranged behind the air throttle valve 10, the air intercooler 13 is arranged behind the compressor of the air supercharger 12, and the air bypass valve 11 is arranged in parallel with the air supercharger 12 and the air intercooler 13. The type of the control signal of the air bypass valve 11 is 4-20 mA, and the engine ECU16 controls the air bypass valve 11 based on an air charging pressure closed-loop control algorithm to realize the control of the air charging pressure.
The air throttle 14 is arranged behind the air intercooler 13, the type of a control signal of the air throttle 14 is 4-20 mA, and the engine ECU16 drives the air throttle 14 based on a speed and power closed-loop control algorithm to realize rotation speed and power control.
A gas engine provided with the branched intake air control device as described above.
As shown in fig. 1, in the present invention: after the engine is started, fuel gas enters the pressure regulating valve 2 through the fuel gas electromagnetic valve 1, the fuel gas is subjected to pressure stabilizing regulation through the pressure regulating valve 2 and then is output to the fuel gas throttle valve 3, the fuel gas enters the fuel gas supercharger 5 through the fuel gas throttle valve 3 and then is cooled through the fuel gas intercooler 6, the input end of the fuel gas bypass valve 4 is connected to the rear of the fuel gas throttle valve 3, and the output end of the fuel gas bypass valve is connected to the rear of the fuel gas intercooler 6 through a steel pipe to form. The gas passes through the gas intercooler 6, then the gas throttle valve 7 and finally the single cylinder regulating valve 8 and flows into the engine cylinder 15 to be mixed with the air.
After the engine is started, air is filtered by an air filter 9, enters an air supercharger 12 through an air throttle valve 10, is cooled by an air intercooler 13, the input end of an air bypass valve 11 is connected to the rear of the air throttle valve 10, and the output end of the air bypass valve is connected to the rear of the air intercooler 13 through a steel pipe, so that a bypass control loop of the air supercharger 12 is formed. Air passes through an air intercooler 13, then through an air throttle 14, and finally through cylinder intake manifolds into engine cylinders 15 for mixing with combustion gases.
In the invention: the engine ECU16 is an engine core control unit that mainly executes the following control strategies: based on an air-fuel ratio closed-loop control strategy of combustion feedback, the automatic control of the air-fuel ratio of the engine is realized by controlling the gas throttle valve 3 and the air throttle valve 10; the speed regulation closed-loop control strategy based on the rotating speed or power signal realizes the rotating speed and power control of the engine by controlling the gas throttle valve 8 and the air throttle valve 14; based on a closed-loop control strategy of gas and air supercharging pressure, the control of gas and air supercharging target pressure is realized by controlling a gas bypass valve and an air bypass valve; based on the balance control and protection control strategy of combustion feedback of each cylinder of the engine, the air inlet balance control and the rapid protection control of each cylinder are realized by controlling the single-cylinder regulating valve.
The technical scheme of the invention can be widely applied to various gas engines such as industrial tail gas, biomass gas, pyrolysis gas and the like, and particularly provides a perfect solution in the field of high-hydrogen-content gas.
Compared with a premixing air inlet type control device: in the application field of industrial tail gas, biomass gas and pyrolysis gas, because the hydrogen content of a gas source is higher, if a premixed gas inlet type structure is adopted, because a large amount of mixed gas exists in a gas inlet pipe, serious deflagration is easy to occur; and adopt the formula structure of admitting air along separate routes, the intake pipe does not have the gas mixture, even take place detonation in the engine cylinder, also very easy control can not cause serious detonation, can promote gas engine's reliability by a wide margin.
Compared with the prior multipoint electric spraying control device: the electric injection valve of the multipoint electronic injection control device has extremely high requirements on the pressure and the components of a gas source, is usually only used in the field of natural gas and has larger limitation. The shunt gas inlet control device can be suitable for various fuel gases, and has extremely high safety and reliability.
In the field of fuel gas with high hydrogen content, the invention has the following great advantages: each cylinder is provided with a single-cylinder regulating valve, so that not only can the balanced control of combustion of each cylinder be realized, but also the protection control of each cylinder can be quickly realized, and the running reliability of the engine is greatly improved.
The invention also provides a gas engine branch air inlet control method. The invention can be widely applied to various gas engines, and particularly has obvious technical advantages in the fields of industrial tail gas, pyrolysis gas, biomass gas and the like.
The foregoing is a more detailed description of the invention that is presented in connection with specific embodiments, which are not intended to limit the invention to the particular embodiments described herein. For a person skilled in the art to which the invention pertains, several equivalent alternatives or obvious modifications, all of which have the same properties or uses, without departing from the inventive concept, should be considered as falling within the scope of the patent protection of the invention, as determined by the claims filed.
Claims (4)
1. A gas engine branch air inlet control device is characterized in that: the gas pressure regulating device comprises a gas inlet communicated with an electromagnetic valve (1), an outlet of the gas electromagnetic valve (1) is communicated with a gas pressure regulating valve (2), and gas passes through the gas electromagnetic valve (1) and then is subjected to pressure stabilizing regulation through the gas pressure regulating valve (2); the outlet of the gas pressure regulating valve (2) is communicated with a gas throttle valve (3); the outlet of the gas throttle valve (3) is respectively communicated with a gas bypass valve (4) and a gas inlet of a gas supercharger (5); the gas outlet of the gas supercharger (5) is communicated with a gas intercooler (6), the gas outlets of the gas intercooler (6) and the gas bypass valve (4) are communicated with a gas throttle valve (7), the outlet of the throttle valve (7) is communicated with a gas engine gas inlet manifold, each gas outlet of the engine gas inlet manifold is communicated with a single-cylinder regulating valve (8), and the gas outlet of the single-cylinder regulating valve (8) is communicated with an engine cylinder (15);
the air inlet is communicated with an air filter (9), the air outlet of the air filter (9) is respectively communicated with an air bypass valve (11) and an air supercharger (12), and the air outlet of the air supercharger (12) is communicated with an air intercooler (13); air outlets of the air bypass valve (11) and the air intercooler (13) are communicated with an air throttle valve (14), and the air throttle valve (14) is communicated with an engine cylinder (15) through an engine air inlet manifold;
the gas booster valve (5) and the air booster valve (12) are respectively used for controlling the boosting pressure of the gas and the air intake manifold of the engine;
after the engine is started, fuel gas enters the pressure regulating valve (2) through the fuel gas electromagnetic valve (1), the fuel gas is subjected to pressure stabilizing regulation through the pressure regulating valve (2) and is output to the fuel gas throttle valve (3), the fuel gas enters the fuel gas supercharger (5) through the fuel gas throttle valve (3) and is cooled through the fuel gas intercooler (6), the input end of the fuel gas bypass valve (4) is connected to the rear of the fuel gas throttle valve (3), and the output end of the fuel gas bypass valve is connected to the rear of the fuel gas intercooler (6) through a steel pipe so as to form a bypass control; the fuel gas passes through the fuel gas intercooler (6), then passes through the fuel gas throttle valve (7) and finally flows into the engine cylinder (15) through the single-cylinder regulating valve (8) to be mixed with the air;
after the engine is started, air is filtered by an air filter (9), enters an air supercharger (12) through an air throttle valve (10), is cooled by an air intercooler (13), the input end of an air bypass valve (11) is connected to the air throttle valve (10), and the output end of the air bypass valve is connected to the air intercooler (13) through a steel pipe, so that a bypass control loop of the air supercharger (12) is formed. Air flows into an engine cylinder (15) through an air intercooler (13), an air throttle valve (14) and an air inlet manifold of each cylinder to be mixed with fuel gas;
the gas-fired engine is characterized by further comprising an engine ECU (16), wherein the engine ECU (16) is electrically connected with the gas throttle valve (3), the gas bypass valve (4), the gas throttle valve (7), the single-cylinder regulating valve (8), the air throttle valve (10), the air bypass valve (11) and the air throttle valve (14) respectively; the engine ECU (16) establishes a PID closed-loop control algorithm according to the combustion feedback state of the engine, and controls the gas throttle valve (3) and the air throttle valve (10) to realize electronic regulation of the air-fuel ratio of the engine; the engine ECU (16) establishes a closed-loop control algorithm according to the front-back pressure difference of the gas throttle valve, and controls the gas bypass valve (4) to realize the control of the gas supercharging pressure; the engine ECU (16) establishes a closed-loop control algorithm according to the front-back pressure difference of the air throttle valve, and controls the air bypass valve (11) to realize the control of the air supercharging pressure; the engine ECU (16) establishes a PID closed-loop control algorithm according to the engine rotating speed or power signal, and controls the gas throttle valve (7) and the air throttle valve (14) simultaneously to realize the control of the engine rotating speed and the output power; the engine ECU (16) establishes a closed-loop control algorithm according to the combustion feedback state of each cylinder of the engine, and controls the single-cylinder regulating valve (8) so as to realize the control of the air inlet uniformity and the combustion protection of each cylinder.
2. The gas engine bypass air inlet control device according to claim 1, wherein the single cylinder regulating valve adopts a position type electric regulating valve driven by 4-20 mA.
3. The gas engine bypass air inlet control device according to claim 1, wherein the control signal types of the gas throttle valve (3), the gas bypass valve (4), the single cylinder regulating valve (8), the air throttle valve (10), the air bypass valve (11) and the air throttle valve (14) are 4-20 mA.
4. A branch air inlet control method of a gas engine, which is characterized in that the branch air inlet control device of the gas engine as claimed in any one of claims 1 to 3 is used for controlling the air inlet of the gas engine.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113217180A (en) * | 2021-05-10 | 2021-08-06 | 河南柴油机重工有限责任公司 | Low-emission high-speed high-power marine gas engine system and control method |
| CN113982758A (en) * | 2021-11-09 | 2022-01-28 | 烟台杰瑞石油装备技术有限公司 | Gas supply system, gas supply method, and equipment equipped with turbine engine |
| CN114934865A (en) * | 2022-05-24 | 2022-08-23 | 中国第一汽车股份有限公司 | Engine intake manifold assembly and control method |
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| CN115539228A (en) * | 2022-10-17 | 2022-12-30 | 陕西柴油机重工有限公司 | Air inlet control system and method of premixed high-power gas engine |
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| US11913380B2 (en) | 2020-01-07 | 2024-02-27 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Gas source system for supplying combustion gas to a turbine engine by fracturing manifold equipment |
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| CN114934865A (en) * | 2022-05-24 | 2022-08-23 | 中国第一汽车股份有限公司 | Engine intake manifold assembly and control method |
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| CN115539228A (en) * | 2022-10-17 | 2022-12-30 | 陕西柴油机重工有限公司 | Air inlet control system and method of premixed high-power gas engine |
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Application publication date: 20210416 |