CN107489544A - Engine gas spraying system and natural gas injection time computational methods - Google Patents
Engine gas spraying system and natural gas injection time computational methods Download PDFInfo
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- CN107489544A CN107489544A CN201710889886.3A CN201710889886A CN107489544A CN 107489544 A CN107489544 A CN 107489544A CN 201710889886 A CN201710889886 A CN 201710889886A CN 107489544 A CN107489544 A CN 107489544A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
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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 invention discloses a kind of engine gas spraying system and natural gas injection time computational methods, it gives the injecting time of petrol jet by obtaining gasoline ECU, and then calculate the emitted dose of gasoline, then the emitted dose of natural gas is calculated, because the emitted dose of natural gas follows in proportion with gasoline injection amount, it ensure that when being switched to combustion of natural gas pattern, it is consistent under the air-fuel ratio and gasoline mode of each operating mode, gasoline ECU air-fuel ratio closed-loop control system can adjust air-fuel ratio closed loop to target air-fuel ratio, engine emission performance does not reduce, and burning is controllable；Ensure that gasoline ECU related air-fuel ratio, nozzle auto-adaptive parameter will not change when burning natural gas simultaneously, when reusing gasoline, start the work that function is reliable and stable；It further, since the emitted dose of natural gas strictly follows gasoline injection amount, ensure that OBD dependent diagnostic strategies can continue to run, make to can continue to meet national associated emissions regulation during burning natural gas.
Description
Technical field
The present invention relates to a kind of gasoline natural gas flexible fuel engine gas injection system and natural gas injection time to count
Calculation method, belong to engine control system technical field.
Background technology
For the gasoline natural gas flexible fuel engine reequiped from petrol engine, it is limited to reequip cost and changes
Technical difficulty is filled, in the control of ignition advance angle, primary motivation is intercepted using a device for being commonly called as electronic spark advance device more
Crankshaft signal, and a new crankshaft signal after phase offset is exported, what gasoline engine ECU was received is by phase offset
Crankshaft signal afterwards, and the phase angle identified with new crankshaft signal performs igniting, by changing crankshaft signal phase
The angle of skew, you can change the actual ignition angle of gasoline engine.
In the control of natural gas injection amount, typically using two ways, the first is to use a proportional mixer,
This blender is connected on the air inlet pipeline after air throttle, according to the number of air input of engine by air, with a fixed air capacity/
Gas quantity ratio, automatically adjust the supply of natural gas；Second is that combustion gas ECU is gathered by an air inlet temperature/pressure sensor
Admission pressure temperature signal, then current tach signal is obtained by electronic spark advance device, the engine that current working is calculated with this is born
Lotus, in the oxygen sensor signal by intercepting former gasoline ECU, fuel gas injection amount is calculated with this, and drive natural gas nozzle to hold
OK.
Further, since under natural gas pattern and not needing gasoline injection, therefore under both repacking modes, pass through combustion gas
ECU blocks the nozzle drive signal of former gasoline, and returns to the current signal of an analog gasoline nozzle electrical response, prevents gasoline
ECU recognizes nozzle signal and is truncated and reports an error.Both repacking modes need not do any change to former gasoline ECU, change
It is low to fill difficulty, it is easy to spread.
But both repacking modes have one, because natural gas injection amount and gasoline injection amount do not have any pass
System, causes the air-fuel ratio in actual cylinder and former gasoline combustion air-fuel ratio deviation occur, influences engine emission；Also lead simultaneously
Gasoline ECU OBD parts control function failure (such as the diagnosis of ternary catalyzing unit efficiency) is caused, causes trouble light on vehicle to be lighted,
Influence driver driving impression.
Therefore, if a kind of gasoline natural gas flexible fuel engine gas injection system and natural gas injection can be proposed
Between computational methods so that there is corresponding relation in proportion in the emitted dose of natural gas, with gasoline injection amount so, it is ensured that former vapour
In-cylinder combustion air-fuel ratio under oily pattern so that engine emission performance does not decline during burning natural gas, while in gasoline ECU
OBD control functions will not also fail, and still disclosure satisfy that national Abgasgesetz.
The content of the invention
The present invention seeks to propose a kind of gasoline natural gas flexible fuel engine gas injection system and natural gas injection
Time computational methods, solve above-mentioned technical problem.
The present invention solves technical problem and adopted the following technical scheme that：A kind of gasoline natural gas flexible fuel engine gas injection
System is penetrated, it includes gasoline ECU, natural gas ECU, petrol jet, combustion gas gas rail, fuel gas temperature pressure sensor, gas spraying
Mouth and fuel gas injection conduit；
The gasoline ECU is connected with the natural gas ECU by petrol jet drive signal line；Natural gas ECU passes through vapour
Oil burner nozzle drive signal line connects petrol jet；
The gasoline ECU is connected by CAN lines with natural gas ECU, to send air-fuel ratio open/close to natural gas ECU
State；
The natural gas nozzle is connected to natural gas ECU through natural gas nozzle drives line, the natural gas nozzle with it is described
Combustion gas gas rail is connected, but also is connected with fuel gas injection conduit, and the natural gas in combustion gas gas rail is passed through into fuel gas injection conduit
Spray into inlet manifold；
The fuel gas temperature pressure sensor is installed on combustion gas gas rail, and signal is connected to the natural gas ECU, is used for
Fuel gas temperature and pressure signal in collection combustion gas gas rail in real time；And the fuel gas temperature and pressure signal are transmitted to the natural gas
ECU。
Optionally, the gasoline natural gas flexible fuel engine gas injection system also includes high-pressure natural gas gas storage
Bottle, high-pressure natural gas pressure sensor, combustion gas cleaner, gas pressure reducers stop valve, gas pressure reducers reference pressure conduit and
Gas pressure reducers；
The high-pressure natural gas gas bomb is connected to gas pressure reducers stop valve, and the high pressure by combustion gas cleaner
High-pressure natural gas pressure sensor, the high-pressure natural gas are provided with the pipeline that natural gas storage pot holding is connected with combustion gas cleaner
Pressure sensor signal is connected to the natural gas ECU；
The gas pressure reducers stop valve is also attached to gas pressure reducers, and the gas pressure reducers connect with combustion gas gas rail；
Gas pressure reducers reference pressure conduit is provided with the gas pressure reducers.
The present invention solves technical problem and also adopted the following technical scheme that：A kind of gasoline natural gas flexible fuel engine combustion gas
The natural gas injection time computational methods of spraying system, comprise the following steps：
S10, natural gas ECU monitor the petrol jet drive current waveform transmitted by gasoline ECU in real time, and calculate gasoline
The drive signal pulsewidth of nozzle；
S20, with reference to petrol jet discharge characteristic, gasoline injection pressure information, calculate gasoline injection amount；
S30, when gasoline ECU is in air-fuel ratio closed-loop control state, according to gasoline and the equivalent air-fuel bit of natural gas
Property, calculate the natural gas injection amount required for " etc. air-fuel ratio replace "；When gasoline ECU is in air-fuel ratio opened loop control state
When, then directly table look-up to obtain jet quantity correction coefficient according to current rotating speed and gasoline injection amount, being multiplied by this with gasoline injection amount repaiies
Positive coefficient, natural gas injection amount is obtained, this correction factor is demarcated to obtain based on present engine state；
S40, the natural gas injection amount calculated according to step S30, with reference to according to natural gas nozzle flow characteristic, natural gas
Injection temperation and gas spraying injection pressure, and natural gas partial pressure calculate the spray of natural gas nozzle to the correction factor of air inflow
Penetrate pulsewidth；
If S50, being currently at combustion of natural gas pattern, natural gas ECU cuts off the gasoline jet drive of petrol jet
Signal, and to the electric signal of one analog gasoline nozzle response of gasoline ECU feedbacks, prevent gasoline ECU from recognizing petrol jet
It is cut off and reports open fault；Then natural gas nozzle is controlled to perform according to the natural gas nozzle injection pulse width of calculating.
The present invention has the advantages that：The gasoline natural gas flexible fuel engine gas injection system of the present invention,
Give the injecting time of petrol jet by obtaining gasoline ECU, and then be aware of the emitted dose of gasoline, be then based on " etc. air-fuel
Than " principle replaced calculates the emitted dose of natural gas, because the emitted dose of natural gas follows in proportion with gasoline injection amount, guarantor
Demonstrate,prove when being switched to combustion of natural gas pattern, consistent under the air-fuel ratio and gasoline mode of each operating mode, gasoline ECU air-fuel ratio
Air-fuel ratio closed loop can be adjusted to target air-fuel ratio, engine emission performance and do not reduced by closed-loop control system, and burning is controllable；Simultaneously
Ensure that gasoline ECU related air-fuel ratio, nozzle auto-adaptive parameter will not change when burning natural gas, reuse gasoline
When, start the work that function is reliable and stable；Further, since the emitted dose of natural gas strictly follows gasoline injection amount, OBD ensure that
Dependent diagnostic strategy can continue to run, and make to can continue to meet national associated emissions regulation during burning natural gas.
Brief description of the drawings
Fig. 1 is the system construction drawing of gasoline natural gas flexible fuel engine gas injection system；
Mark is illustrated as in figure：1- gasoline ECU；2- natural gases ECU；3-CAN lines；4- petrol jet drive signal lines；5-
Petrol jet drive signal line；6- petrol jets；7- gasoline fuel guide rails；8- combustion gas gas rails；9- fuel gas temperature pressure sensors；
10- natural gas nozzles；11- fuel gas injection conduits；12- natural gas nozzle drives lines；13- gas pressure reducers；14- gas pressure reducers
Reference pressure conduit；15- gas pressure reducers stop valves；16- natural gas cleaners；17- high-pressure natural gas pressure sensors；18-
High-pressure natural gas gas bomb.
Embodiment
Technical scheme is further elaborated with reference to embodiment and accompanying drawing.
Embodiment 1
A kind of gasoline natural gas flexible fuel engine gas injection system, including gasoline ECU 1 are present embodiments provided,
Natural gas ECU 2, CAN line 3, petrol jet drive signal line 4, petrol jet drive signal line 5, petrol jet 6, gasoline fuel
Guide rail 7, combustion gas gas rail 8, fuel gas temperature pressure sensor 9, natural gas nozzle 10, fuel gas injection conduit 11, natural gas nozzle drive
Moving-wire 12, gas pressure reducers 13, gas pressure reducers reference pressure conduit 14, gas pressure reducers stop valve 15, natural gas cleaner
16, high-pressure natural gas pressure sensor 17, high-pressure natural gas gas bomb 18.
The gasoline ECU1 is connected with the natural gas ECU2 by petrol jet drive signal line 4, and gasoline ECU is to gasoline
The drive signal that nozzle 6 is sent, which first passes through petrol jet drive signal line 4 and sent to natural gas ECU, natural gas ECU, passes through gasoline
Nozzle drive signal line 5 connects petrol jet 6.
The petrol jet 6 is connected with gasoline fuel guide rail 7, and the hydraulic oil in gasoline fuel guide rail 7 is spurted into gas
Cylinder or inlet manifold.
Natural gas nozzle 10 is connected to natural gas ECU through natural gas nozzle drives line 12, receives the drive that natural gas ECU is sent
Dynamic signal simultaneously performs, and by fuel gas injection conduit 11 to spraying appropriate natural gas in each cylinder inlet manifold；
Gasoline ECU by CAN lines using 10ms as the cycle to natural gas ECU send air-fuel ratio open/close state, so as to
When gasoline ECU is in air-fuel ratio closed loop states, natural gas ECU can be based on the principle such as " air-fuel ratio replace " and calculate natural gas injection
Amount；And when gasoline ECU is in air-fuel ratio open loop situations, it can be obtained based on engine condition by demarcation under current working
Natural gas injection amount；
The high-pressure natural gas being stored in high-pressure natural gas gas bomb 18 is connected to combustion gas after natural gas cleaner 16 and subtracted
Depressor 13, the low pressure natural gas after the decompression of gas pressure reducers 13 is transported in combustion gas gas rail 8, and passes through natural gas nozzle 10
After ejection, it is delivered to through gas conduct pipe 11 in each cylinder inlet manifold.
High-pressure natural gas pressure sensor 17 is installed between high-pressure natural gas gas bomb 18 and natural gas cleaner 16
On pipeline, for gathering the gas pressure in high-pressure natural gas gas bomb, the connection of gas pressure reducers reference pressure conduit 14 and hair
After motivation air throttle in inlet manifold, adjusted for the pressure after being depressurized according to air- distributor pressure to gas pressure reducers 13
It is whole；
Fuel gas temperature pressure sensor 9 is installed on combustion gas gas rail 8, for gathering combustion gas gas rail in real time using 10ms as the cycle
In fuel gas temperature and pressure signal；
In gasoline combustion pattern, after drive signal that gasoline ECU is sent to petrol jet 6 passes to natural gas ECU, day
Right gas ECU is transmitted directly to petrol jet 6 without processing, and the effects of natural gas ECU now are equivalent to one and transmit signal
Wire；In combustion of natural gas pattern, after drive signal that gasoline ECU is sent to petrol jet 6 passes to natural gas ECU, day
Right gas ECU sends drive signal to petrol jet 6 not by petrol jet drive signal line 5, and has blocked this driving
Signal, while the electric signal responded by hardware circuit one analog gasoline nozzle 6 of return, make gasoline ECU not to be diagnosed to be
The open circuit electric fault of petrol jet 6.
Natural gas ECU is when blocking the drive signal for being sent to petrol jet 6, by gathering the current waveform of drive signal,
The gasoline injecting time of current working is obtained, is then repaiied according to the propellant composition difference of natural gas and gasoline, and other correlations
Just, calculate to obtain the injecting time of the natural gas required for same in-cylinder combustion air-fuel ratio, and give natural gas nozzle 10
Perform.
The gasoline natural gas flexible fuel engine gas injection system of the present invention, gasoline is given by obtaining gasoline ECU
The injecting time of nozzle, and then be aware of the emitted dose of gasoline, it is then based on the principle that " etc. air-fuel ratio " replaces and calculates naturally
The emitted dose of gas, because the emitted dose of natural gas follows in proportion with gasoline injection amount, it ensure that and be switched to combustion of natural gas mould
During formula, consistent under the air-fuel ratio and gasoline mode of each operating mode, gasoline ECU air-fuel ratio closed-loop control system can be by air-fuel ratio
Closed loop is adjusted to target air-fuel ratio, engine emission performance and not reduced, and burning is controllable；Ensure gasoline ECU related air-fuel simultaneously
It will not be changed than, nozzle auto-adaptive parameter when burning natural gas, when reusing gasoline, start function reliable and stable
Work；Further, since the emitted dose of natural gas strictly follows gasoline injection amount, it ensure that OBD dependent diagnostic strategies can continue to
Operation, makes to can continue to meet national associated emissions regulation during burning natural gas.
Embodiment 2
A kind of computational methods of gasoline natural gas flexible fuel engine natural gas injection amount are present embodiments provided, including
Following steps：
S10, natural gas ECU monitor petrol jet drive current waveform in real time, and calculate the drive signal of petrol jet
Pulsewidth (in terms of ms)；
S20, with reference to petrol jet discharge characteristic (i.e. linear characteristic), gasoline injection pressure information, calculate gasoline injection
Amount；
S30, when gasoline ECU is in air-fuel ratio closed-loop control state, according to gasoline and the equivalent air-fuel bit of natural gas
Property, calculate the natural gas injection amount required for " etc. air-fuel ratio replace " (in terms of mg)；When gasoline ECU is in air-fuel ratio open loop control
During state processed, then directly table look-up to obtain jet quantity correction coefficient according to current rotating speed and gasoline injection amount, multiplied with gasoline injection amount
With this correction factor, natural gas injection amount is obtained, this correction factor can be based on present engine state (row's temperature, combustion stability)
Demarcation obtains；
S40, the natural gas injection amount calculated according to step S30, with reference to according to natural gas nozzle flow characteristic, natural gas
Injection temperation and gas spraying injection pressure, and natural gas partial pressure calculate natural gas to the correction factor (about 0.9) of air inflow
The injection pulse width of nozzle (in terms of ms)；
If S50, being currently at combustion of natural gas pattern, natural gas ECU cuts off the gasoline jet drive of petrol jet
Signal, and to the electric signal of one analog gasoline nozzle response of gasoline ECU feedbacks, prevent gasoline ECU from recognizing petrol jet
It is cut off and reports open fault；Then natural gas nozzle is controlled to perform according to the natural gas nozzle injection pulse width of calculating.
The sequencing of above example only for ease of describing, does not represent the quality of embodiment.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (3)
1. a kind of gasoline natural gas flexible fuel engine gas injection system, it is characterised in that including gasoline ECU, natural gas
ECU, petrol jet, combustion gas gas rail, fuel gas temperature pressure sensor, natural gas nozzle and fuel gas injection conduit；
The gasoline ECU is connected with the natural gas ECU by petrol jet drive signal line；Natural gas ECU is sprayed by gasoline
Mouth drive signal line connects petrol jet；
The gasoline ECU is connected by CAN lines with natural gas ECU, to send air-fuel ratio open/close state to natural gas ECU；
The natural gas nozzle is connected to natural gas ECU, the natural gas nozzle and the combustion gas through natural gas nozzle drives line
Gas rail is connected, but also is connected with fuel gas injection conduit, and the natural gas in combustion gas gas rail is sprayed into by fuel gas injection conduit
Inlet manifold；
The fuel gas temperature pressure sensor is installed on combustion gas gas rail, and signal is connected to the natural gas ECU, for real-time
Gather fuel gas temperature and pressure signal in combustion gas gas rail；And the fuel gas temperature and pressure signal are transmitted to the natural gas ECU.
2. gasoline natural gas flexible fuel engine gas injection system according to claim 1, it is characterised in that also wrap
Include high-pressure natural gas gas bomb, high-pressure natural gas pressure sensor, combustion gas cleaner, gas pressure reducers stop valve, gas pressure-reducing
Device reference pressure conduit and gas pressure reducers；
The high-pressure natural gas gas bomb is connected to gas pressure reducers stop valve by combustion gas cleaner, and the high pressure is natural
High-pressure natural gas pressure sensor, the high-pressure natural gas pressure are provided with the pipeline that gas gas bomb is connected with combustion gas cleaner
Sensor signal is connected to the natural gas ECU；
The gas pressure reducers stop valve is also attached to gas pressure reducers, and the gas pressure reducers connect with combustion gas gas rail；It is described
Gas pressure reducers reference pressure conduit is provided with gas pressure reducers.
3. a kind of natural gas injection time computational methods of gasoline natural gas flexible fuel engine gas injection system, its feature
It is, comprises the following steps：
S10, natural gas ECU monitor the petrol jet drive current waveform transmitted by gasoline ECU in real time, and calculate petrol jet
Drive signal pulsewidth；
S20, with reference to petrol jet discharge characteristic, gasoline injection pressure information, calculate gasoline injection amount；
S30, when gasoline ECU is in air-fuel ratio closed-loop control state, according to the equivalent air-fuel ratio characteristic of gasoline and natural gas, meter
Calculate the natural gas injection amount required for " etc. air-fuel ratio replace "；When gasoline ECU is in air-fuel ratio opened loop control state, then directly
Connect and table look-up to obtain jet quantity correction coefficient according to current rotating speed and gasoline injection amount, this correction factor is multiplied by with gasoline injection amount,
Natural gas injection amount is obtained, this correction factor is demarcated to obtain based on present engine state；
S40, the natural gas injection amount calculated according to step S30, with reference to according to natural gas nozzle flow characteristic, natural gas injection
Temperature and gas spraying injection pressure, and natural gas partial pressure calculate the injection arteries and veins of natural gas nozzle to the correction factor of air inflow
It is wide；
If S50, being currently at combustion of natural gas pattern, natural gas ECU cuts off the gasoline jet drive signal of petrol jet,
And the electric signal of an analog gasoline nozzle response is fed back to gasoline ECU, prevent gasoline ECU from recognizing petrol jet and being cut off
And report open fault；Then natural gas nozzle is controlled to perform according to the natural gas nozzle injection pulse width of calculating.
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| CN108361113A (en) * | 2018-01-03 | 2018-08-03 | 中国第汽车股份有限公司 | The computational methods of natural gas injection pulsewidth in gasoline natural gas flexible fuel engine transient process |
| CN109441651A (en) * | 2018-10-16 | 2019-03-08 | 安徽江淮汽车集团股份有限公司 | The natural gas spray painting pulsewidth modification method of flexible fuel engine |
| CN110118129A (en) * | 2019-04-15 | 2019-08-13 | 上海依相动力系统有限公司 | A kind of oil-gas two-way fuel delivery machine control system |
| CN110219733A (en) * | 2019-06-27 | 2019-09-10 | 西华大学 | A kind of natural gas/gasoline double fuel GDI engine and its control method |
| CN110700958A (en) * | 2019-09-29 | 2020-01-17 | 潍柴西港新能源动力有限公司 | Method for detecting faults of natural gas temperature control system |
| CN110925107A (en) * | 2019-12-20 | 2020-03-27 | 潍柴西港新能源动力有限公司 | Fuel closed-loop control method for gas power generation engine |
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| CN113108749A (en) * | 2021-05-20 | 2021-07-13 | 中国第一汽车股份有限公司 | Phase angle calibration method and device of dual-motor hybrid power system and vehicle |
| CN113432151A (en) * | 2021-06-30 | 2021-09-24 | 中国航发动力股份有限公司 | Method and system for modifying gas nozzle based on fuel nozzle |
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