CN203978644U - Automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system - Google Patents
Automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system Download PDFInfo
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- CN203978644U CN203978644U CN201420407548.3U CN201420407548U CN203978644U CN 203978644 U CN203978644 U CN 203978644U CN 201420407548 U CN201420407548 U CN 201420407548U CN 203978644 U CN203978644 U CN 203978644U
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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
Abstract
The utility model discloses automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system, comprise gas feeder, compressed natural gas bottle is wherein connected with rock gas pressure-reduced and-regulated device by gas pipeline, rock gas pressure-reduced and-regulated device is connected with automatically controlled servo pressure-regulating device by natural gas filter, automatically controlled servo pressure-regulating device is connected with mixer one end by air-fuel ratio control device, the mixer the other end successively with electronic throttle, intake manifold and natural gas engine are connected, the 3rd end of mixer is connected with intercooler and pressurized machine by air pipe line, the aperture of butterfly valve is controlled in electric control system controls combustion gas, control the flow of rock gas, realize the accurate control of air and rock gas air fuel ratio, automatical control system utilizes automatically controlled servo pressure-regulating device to regulate gas pressure according to natural gas engine intake manifold's pressure, make combustion gas control pressure before butterfly valve and the pressure reduction of intake manifold's pressure remains in setting range, improve responsiveness and precision that air fuel ratio is controlled.
Description
Technical field
The utility model relates to the technical field of natural gas engine, relates to especially the automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system that improves air fuel ratio control accuracy.
Background technique
Rock gas is a kind of clean fuel, and in combustion process, almost without Soot Formation, engine for combusting rock gas discharge is low, has wide material sources simultaneously, and price is low advantage, is a kind of desirable internal-combustion engine alternative energy source.
The marine engine of China is nearly all diesel engine at present, in running, water system is polluted, and promoting natural gas engine peculiar to vessel becomes the important measures of controlling inland river and each river pollution.The source of the gas of marine engine is pressure gas source, so the mode that can adopt pressurized machine in supercharging marine engine after, single-point mixes or multiple spot mixes.Single-point mixed gas motor has combustible gas and mixes, and is easy to the advantage of tissue burning.
After Vehicle Turbocharged, single-point type mixed gas motor adopts electric controlled injection valve to control emitted dose control to air fuel ratio with realization of rock gas more at present, but injection valve exists wear problem, the life-span is short, in using process, need frequent replacing, cause user cost to raise, and the flow of electric controlled injection valve is generally less, be not suitable for the natural gas engine peculiar to vessel that cylinder bore is larger.And common diaphragm-type mixer is low to the control accuracy of rock gas, be not suitable for the motor that rock gas after supercharging/air mixes.
Model utility content
The deficiency existing for solving prior art, the utility model discloses automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system, the utility model is controlled the gas pressure before butterfly valve by regulating gas, gas pressure and intake manifold that combustion gas is controlled before butterfly valve remain on a constant difference, also by test the oxygen content in exhaust as feedback signal or utilize electronic throttle of engine aperture, engine rotational speed signal, the aperture that regulating gas is controlled butterfly valve, realizes the accurate control of air fuel ratio.
For achieving the above object, concrete scheme of the present utility model is as follows:
Automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system, comprise gas feeder and automatical control system, compressed natural gas bottle in described gas feeder is connected with rock gas pressure-reduced and-regulated device by gas pipeline, described rock gas pressure-reduced and-regulated device is connected with automatically controlled servo pressure-regulating device by natural gas filter, described automatically controlled servo pressure-regulating device is connected with mixer one end by air-fuel ratio control device, the mixer the other end successively with electronic throttle, intake manifold and natural gas engine are connected, the 3rd end of mixer is connected with intercooler and pressurized machine successively by air pipe line, described natural gas engine is also connected with venting gas appliance, the aperture of butterfly valve is controlled in described electric control system controls combustion gas, control the flow of rock gas, realize the accurate control of air and rock gas air fuel ratio, described automatical control system utilizes automatically controlled servo pressure-regulating device to regulate gas pressure according to natural gas engine intake manifold's pressure, make combustion gas control pressure before butterfly valve and the pressure reduction of intake manifold's pressure remains in setting range, responsiveness and the precision to improve air fuel ratio, controlled.
Described automatically controlled servo pressure-regulating device is automatically controlled servo pressure-regulating valve, and air-fuel ratio control device is that butterfly valve is controlled in combustion gas.
On pipeline between described compressed natural gas bottle and rock gas pressure-reduced and-regulated device, natural air valve is also installed.
On pipeline between described natural gas filter and automatically controlled servo pressure-regulating device, the first gas pressure sensor is also installed.
On pipeline between described automatically controlled servo pressure-regulating device and air-fuel ratio control device, the second gas pressure sensor is also installed.
Cold rear air pressure probe in being also provided with on air pipe line between described mixer and intercooler, intake manifold's pressure transducer is installed on described intake manifold, engine rotation speed sensor is installed on natural gas engine, on described venting gas appliance, exhaust gas oxygen sensor is installed.
Described automatical control system and the first gas pressure sensor, the second gas pressure sensor, exhaust gas oxygen sensor, automatically controlled servo pressure-regulating valve, combustion gas control butterfly valve, in cold rear air pressure probe, electronic throttle, exhaust gas oxygen sensor, engine rotation speed sensor and intake manifold's pressure transducer be connected.
Automatically controlled servo pressure-regulating formula natural gas engine air/fuel ratio control method, comprises the following steps:
Step 1: engine start operation, automatical control system is controlled electronic throttle according to predefined MAP figure, the initial opening of butterfly valve is controlled in combustion gas, and automatically controlled servo pressure-regulating valve is controlled the gas pressure before butterfly valve according to intake manifold's Simultaneous Pressure regulating gas, and motor starts starting;
Step 2: automatical control system is according to the MAP figure demarcating in advance and in conjunction with intake manifold's pressure, with open loop mode coupling, regulate electronic throttle, butterfly valve is controlled in automatically controlled servo pressure-regulating valve and combustion gas, motor is stabilized in idle, exhaust reaches after uniform temperature, exhaust gas oxygen sensor is started working, and enters closed loop control mode, and automatical control system is accurately controlled air fuel ratio according to the feedback of exhaust gas oxygen sensor;
Step 3: when the speed of natural gas engine or load change, first automatical control system regulates the aperture of electronic throttle, the flow of adjustment mixed gas;
Step 4: the pressure that intake manifold's pressure transducer implement to gather in intake manifold is also transferred to automatical control system, automatical control system is adjusted automatically controlled servo pressure-regulating valve according to the feedback signal of gas pressure sensor after intake manifold's pressure and servo valve makes pressure after pressure regulator valve change with intake manifold's pressure;
Step 5: automatical control system is adjusted the aperture that butterfly valve is controlled in combustion gas, controls gas discharge according to the MAP figure demarcating, and realizes the open loop of air fuel ratio is controlled;
Step 6: the exhaust oxygen content that automatical control system gathers according to exhaust gas oxygen sensor is as feedback signal, calculate actual mixing ratio, and the default air fuel ratio in actual mixing ratio and MAP is carried out to comparing calculation, and adjust the aperture that butterfly valve is controlled in combustion gas, realize the accurate closed loop control of air fuel ratio.
The beneficial effects of the utility model:
The application is by increasing automatically controlled servo pressure-regulating device, its function is that regulating gas is controlled its pressure of rock gas before butterfly valve, gas pressure and intake manifold that air fuel ratio is controlled before butterfly valve remain on a constant difference, and air-fuel ratio control device, its by test the oxygen content in exhaust as feedback signal or electronic throttle of engine aperture, engine rotational speed signal, the aperture that regulating gas is controlled butterfly valve, realizes the accurate control of air fuel ratio.
Accompanying drawing explanation
The regulating system schematic diagram of the existing natural gas engine air fuel ratio of Fig. 1;
The regulating system schematic diagram of Fig. 2 the application's natural gas engine air fuel ratio;
The adjusting schematic flow sheet of Fig. 3 the application's natural gas engine air fuel ratio;
In figure, 101 compressed natural gas bottles, 102 natural air valves, 103 exhaust gas oxygen sensors, 104 engine rotation speed sensors, 105 natural gas engines, 106 pressurized machines, 107 intercoolers, 108 air pipe lines, 109 intake manifolds, cold rear air pressure probe in 110, 111 mixers, 112 electronic throttles, 113 electrically controlled injectors, 117 first gas pressure sensors, 118 natural gas filters, 119 rock gas pressure-reduced and-regulated devices, 120 electric control system ECUs, 121 gas pipelines, 122 intake manifold's pressure transducers, 123 igniting units, butterfly valve is controlled in 214 combustion gas, 215 second gas pressure sensors, 216 automatically controlled servo pressure-regulating valves.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is elaborated:
As shown in Figure 1, the adjustment process of existing natural gas engine air fuel ratio: open natural air valve 102 in engine operation, the high-pressure natural gas storing in compressed natural gas bottle 101 reaches design pressure after 119 decompressions of rock gas pressure-reduced and-regulated device, through natural gas filter 118, from gas pipeline 121, flow into electrically controlled injector 113, electric control system ECU 120 calculates natural gas injection amount according to the feedback of the working order of motor and exhaust gas oxygen sensor 103, and control the pulsewidth of electrically controlled injector 113, reach the object of controlling air fuel ratio, rock gas/air mixes in mixer 112, electric control system ECU 120 is controlled the aperture of electronic throttle 112, to control the total discharge of mixing, mixed gas is in natural gas engine 105, by igniting unit 123, lighted and externally acting, waste gas is discharged after reprocessing from the vent systems of motor.
Yet, according to the natural gas engine auxiliary fuel supply-system of the prior art, electric control system ECU 120 is controlled the emitted dose of the injection pulse width control rock gas of electrically controlled injector 113, the control of realization to air fuel ratio, but electrically controlled injector is shorter 113 working lifes, in using process, need periodic replacement, and the flow of electrically controlled injector 113 is generally less, is not suitable for the natural gas engine peculiar to vessel that cylinder bore is larger.
For the problems of the prior art, the application has proposed a kind of brand-new solution.According to this solution, after pressurized machine, the air fuel ratio of rock gas/air mixed gas motor is controlled the mode that adopts automatically controlled servo pressure-regulating device and combustion gas to control butterfly valve coupling work, automatically controlled servo pressure-regulating device is according to the mixture pressure in intake manifold, regulating gas is controlled the gas pressure before butterfly valve, makes the pressure of rock gas exceed all the time intake manifold's pressure certain numerical value; The aperture of controlling butterfly valve by controlling combustion gas is controlled the flow of rock gas, realizes the accurate control to air fuel ratio, makes engine response fast, and stabilization of speed is functional.
As shown in Figure 2, natural gas engine auxiliary fuel supply-system in the technology of automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system of the present utility model and prior art is similar, this system is controlled butterfly valve 214 with combustion gas and has been replaced electrically controlled injector 113, also comprise the second gas pressure sensor 215 after servo valve, automatically controlled servo pressure-regulating valve 216.
Automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system, comprise compressed natural gas bottle 101 and automatical control system 120, described compressed natural gas bottle 101 is connected with rock gas pressure-reduced and-regulated device 119 by gas pipeline 121, described rock gas pressure-reduced and-regulated device 119 is connected with automatically controlled servo pressure-regulating device by natural gas filter 118, described automatically controlled servo pressure-regulating device is connected with mixer 111 one end by air-fuel ratio control device, mixer 111 the other ends successively with electronic throttle 112, intake manifold 109 and natural gas engine 105 are connected, the 3rd end of mixer 111 is connected with intercooler 107 and pressurized machine 106 successively by air pipe line 108, described natural gas engine 105 is also connected with venting gas appliance,
On pipeline between compressed natural gas bottle 101 and rock gas pressure-reduced and-regulated device 119, natural air valve 102 is also installed.
On pipeline between natural gas filter 118 and automatically controlled servo pressure-regulating device, the first gas pressure sensor 117 is also installed.
The second gas pressure sensor 215 is also installed on the pipeline between automatically controlled servo pressure-regulating device and air-fuel ratio control device.
Cold rear air pressure probe 110 in being also provided with on air pipe line 108 between mixer 111 and intercooler 107, on described intake manifold 109, intake manifold's pressure transducer 122 is installed, engine rotation speed sensor 104 is installed on natural gas engine 105, exhaust gas oxygen sensor 103 is installed on described venting gas appliance.
Working procedure: automatically controlled servo pressure-regulating device regulating gas is controlled its pressure of rock gas before butterfly valve, gas pressure and intake manifold that combustion gas is controlled before butterfly valve remain on a constant difference.During motor operation, the high-pressure natural gas storing in compressed natural gas bottle 101 is through natural air valve 102, by reaching design pressure after 119 decompressions of pressure-reduced and-regulated device, through natural gas filter 118, flow into automatically controlled servo pressure-regulating valve 216, electric control system ECU 120 is adjusted automatically controlled servo pressure-regulating valve 216 in real time according to the pressure signal that after intake manifold's pressure transducer 122 and servo valve, the second gas pressure sensor 215 gathers, make combustion gas control pressure before butterfly valve 214 all the time higher than intake manifold's pressure certain numerical value, this numerical value is set as required.The pressure value that in air-fuel ratio control device basis, after cold rear air pressure probe 110 and servo valve, the second gas pressure sensor 215 gathers, and the aperture of electronic throttle 112 and engine rotational speed signal, by MAP, scheme to calculate the aperture that butterfly valve 214 is controlled in combustion gas, and the exhaust oxygen content of feeding back by exhaust gas oxygen sensor 103 controls butterfly valve 214 apertures to combustion gas and revise, realize the accurate closed loop control of air fuel ratio.
In addition, electric control system ECU 220 can be controlled automatically controlled servo pressure-regulating valve 216 simultaneously, and butterfly valve 214 is controlled in combustion gas, to control air fuel ratio according to the runnability of natural gas engine, reaches the object of motor stable and high effective operation
Automatically controlled servo pressure-regulating valve 216 is controlled by electric control system ECU 120, according to natural gas engine intake manifold's pressure, as main control signal, control the pressure after pressure regulator valve, using the second gas pressure sensor 215 gathers after servo valve pressure signal as feedback signal the pressure after to pressure regulator valve revise and adjust, improve the control accuracy of pressure.
Electric control system ECU 120 is controlled the aperture control intake manifold's of electronic throttle 112 pressure and mixed gas flow, butterfly valve 214 apertures and electronic throttle 112 apertures are controlled in gas pressure, combustion gas that electric control system ECU 120 is controlled after automatically controlled servo pressure-regulating valve 216 by coupling, realize the accurate control to engine speed and moment of torsion.
According to the MAP figure of electronic throttle 212 apertures, engine speed and demarcation in advance, can realize the open loop control of combustion gas being controlled to butterfly valve 214, also can realize the closed loop control of combustion gas being controlled to butterfly valve 214 according to the exhaust oxygen content of exhaust gas oxygen sensor 203 feedbacks.
As shown in Figure 3, automatically controlled servo pressure-regulating formula natural gas engine air/fuel ratio control method, comprises the following steps:
Step S301, in engine start running-course control, electric control system ECU 120 is controlled electronic throttle 112 according to predefined MAP figure, the initial opening of butterfly valve 214 is controlled in combustion gas, automatically controlled servo pressure-regulating valve 216 is controlled the gas pressure before butterfly valve 214 according to intake manifold's Simultaneous Pressure regulating gas, and motor starts starting.
Step S302, after just starting of motor because delivery temperature is lower, exhaust gas oxygen sensor 103 does not also work, can not enter closed loop control mode, electric control system ECU 120 is according to the MAP figure demarcating in advance and in conjunction with intake manifold's pressure, with open loop mode coupling, regulate electronic throttle 112, butterfly valve 214 is controlled in automatically controlled servo pressure-regulating valve 216 and combustion gas, motor is stabilized in idle, exhaust reaches after uniform temperature, exhaust gas oxygen sensor 103 is started working, enter closed loop control mode, electric control system ECU 120 is accurately controlled air fuel ratio according to the feedback of exhaust gas oxygen sensor 103.
Step S303, when the speed of natural gas engine 105 or load change, first electric control system ECU 120 regulates the aperture of electronic throttle 112, adjusts the flow of mixed gas.
Step S304, intake manifold's pressure transducer 122 is implemented gather the pressure in intake manifold and be transferred to electric control system ECU 120, and electric control system ECU 120 is adjusted automatically controlled servo pressure-regulating valve 216 according to the feedback signal of the second gas pressure sensor 115 after intake manifold's pressure and servo valve changes the pressure of the intake manifold of pressure institute after pressure regulator valve.
Step S305, electric control system ECU 120, adjusts the aperture that butterfly valve 214 is controlled in combustion gas, according to the MAP figure demarcating, controls gas discharge, realizes the open loop of air fuel ratio is controlled.
Step S306, the exhaust oxygen content that electric control system ECU 120 gathers according to exhaust gas oxygen sensor 103 is as feedback signal, calculate actual mixing ratio, and the default air fuel ratio in actual mixing ratio and MAP is carried out to comparing calculation, adjust combustion gas and control the aperture of butterfly valve 214, realize the accurate closed loop control of air fuel ratio.
In addition, the example of this control strategy when only speed or load change is described, and when gas component changes, utilizes the equally accurately air fuel ratio of control engine of control strategy the utility model of pre-establishing.
It should be noted that, the example with natural gas engine auxiliary fuel supply-system is described the utility model hereinbefore.Yet the utility model is not limited to this, but go for adopting other gas engines existing or that occur in the future.
Claims (7)
1. automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system, it is characterized in that, comprise gas feeder and automatical control system, compressed natural gas bottle in described gas feeder is connected with rock gas pressure-reduced and-regulated device by gas pipeline, described rock gas pressure-reduced and-regulated device is connected with automatically controlled servo pressure-regulating device by natural gas filter, described automatically controlled servo pressure-regulating device is connected with mixer one end by air-fuel ratio control device, the mixer the other end successively with electronic throttle, intake manifold and natural gas engine are connected, the 3rd end of mixer is connected with intercooler and pressurized machine successively by air pipe line.
2. automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system as claimed in claim 1, is characterized in that, described automatically controlled servo pressure-regulating device is automatically controlled servo pressure-regulating valve, and air-fuel ratio control device is that butterfly valve is controlled in combustion gas.
3. automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system as claimed in claim 2, is characterized in that, on the pipeline between described compressed natural gas bottle and rock gas pressure-reduced and-regulated device, natural air valve is also installed.
4. automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system as claimed in claim 3, is characterized in that, on the pipeline between described natural gas filter and automatically controlled servo pressure-regulating device, the first gas pressure sensor is also installed.
5. automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system as claimed in claim 4, is characterized in that, on the pipeline between described automatically controlled servo pressure-regulating device and air-fuel ratio control device, the second gas pressure sensor is also installed.
6. automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system as claimed in claim 5, it is characterized in that, cold rear air pressure probe in being also provided with on air pipe line between described mixer and intercooler, intake manifold's pressure transducer is installed on described intake manifold, engine rotation speed sensor is installed on natural gas engine, on described venting gas appliance, exhaust gas oxygen sensor is installed.
7. automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system as claimed in claim 6, it is characterized in that, described automatical control system and the first gas pressure sensor, the second gas pressure sensor, exhaust gas oxygen sensor, automatically controlled servo pressure-regulating valve, combustion gas control butterfly valve, in cold rear air pressure probe, electronic throttle, exhaust gas oxygen sensor, engine rotation speed sensor and intake manifold's pressure transducer be connected.
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| CN201420407548.3U CN203978644U (en) | 2014-07-23 | 2014-07-23 | Automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system |
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| CN201420407548.3U CN203978644U (en) | 2014-07-23 | 2014-07-23 | Automatically controlled servo pressure-regulating formula natural gas engine auxiliary fuel supply-system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104863754A (en) * | 2015-04-27 | 2015-08-26 | 重庆耐德能源装备集成有限公司 | Shipborne power generation system |
| CN105525989A (en) * | 2016-01-26 | 2016-04-27 | 江苏盛源燃气动力机械有限公司 | Automotive double-fuel system using natural gas |
| CN105697189A (en) * | 2016-03-31 | 2016-06-22 | 山东大学 | System and control method for increasing energy utilization rate of EGR engine |
| CN105927406A (en) * | 2016-05-04 | 2016-09-07 | 山东大学 | Multi-point gas electric control spraying system and method based on pressure-time control |
| CN106979103A (en) * | 2017-06-02 | 2017-07-25 | 广西玉柴机器股份有限公司 | The gas handling system of LNG natural gas engines |
| CN107023421A (en) * | 2017-06-02 | 2017-08-08 | 广西玉柴机器股份有限公司 | The gas supply system of LNG natural gas engines |
| CN107387238A (en) * | 2017-09-15 | 2017-11-24 | 河南柴油机重工有限责任公司 | A kind of diesel gas bifuel system and control method |
| CN110337537A (en) * | 2018-06-29 | 2019-10-15 | 潍柴动力股份有限公司 | The gas control system and its combustion gas control method of non-rice habitats gas engine |
| CN110410225A (en) * | 2019-08-14 | 2019-11-05 | 潍柴西港新能源动力有限公司 | For the engine fuel control system and control method of unstable ingredient gas source |
| CN110657047A (en) * | 2019-09-23 | 2020-01-07 | 潍柴动力股份有限公司 | Fault detection method and device for gas supply system and electronic control unit |
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- 2014-07-23 CN CN201420407548.3U patent/CN203978644U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104863754A (en) * | 2015-04-27 | 2015-08-26 | 重庆耐德能源装备集成有限公司 | Shipborne power generation system |
| CN104863754B (en) * | 2015-04-27 | 2017-10-27 | 重庆耐德能源装备集成有限公司 | A kind of boat-carrying electricity generation system |
| CN105525989B (en) * | 2016-01-26 | 2018-01-12 | 江苏盛源燃气动力机械有限公司 | A kind of automobile-used bifuel system using natural gas |
| CN105525989A (en) * | 2016-01-26 | 2016-04-27 | 江苏盛源燃气动力机械有限公司 | Automotive double-fuel system using natural gas |
| CN105697189A (en) * | 2016-03-31 | 2016-06-22 | 山东大学 | System and control method for increasing energy utilization rate of EGR engine |
| CN105927406A (en) * | 2016-05-04 | 2016-09-07 | 山东大学 | Multi-point gas electric control spraying system and method based on pressure-time control |
| CN105927406B (en) * | 2016-05-04 | 2018-09-28 | 山东大学 | Multi-point gas electric-controlling injection system and method based on pressure versus time control |
| CN106979103A (en) * | 2017-06-02 | 2017-07-25 | 广西玉柴机器股份有限公司 | The gas handling system of LNG natural gas engines |
| CN107023421A (en) * | 2017-06-02 | 2017-08-08 | 广西玉柴机器股份有限公司 | The gas supply system of LNG natural gas engines |
| CN107387238A (en) * | 2017-09-15 | 2017-11-24 | 河南柴油机重工有限责任公司 | A kind of diesel gas bifuel system and control method |
| CN107387238B (en) * | 2017-09-15 | 2019-08-13 | 河南柴油机重工有限责任公司 | A kind of diesel oil-natural gas double-fuel system and control method |
| CN110337537A (en) * | 2018-06-29 | 2019-10-15 | 潍柴动力股份有限公司 | The gas control system and its combustion gas control method of non-rice habitats gas engine |
| CN110337537B (en) * | 2018-06-29 | 2021-05-18 | 潍柴动力股份有限公司 | Gas control system of non-road gas engine and gas control method thereof |
| US11203991B2 (en) | 2018-06-29 | 2021-12-21 | Weichai Power Co., Ltd. | Gas control system and gas control method of off-road gas engine |
| CN110410225A (en) * | 2019-08-14 | 2019-11-05 | 潍柴西港新能源动力有限公司 | For the engine fuel control system and control method of unstable ingredient gas source |
| CN110657047A (en) * | 2019-09-23 | 2020-01-07 | 潍柴动力股份有限公司 | Fault detection method and device for gas supply system and electronic control unit |
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