CN100460659C - Electric control multi-point sequent injection system for gasoline and gas used in electrometallizing vehicle - Google Patents
Electric control multi-point sequent injection system for gasoline and gas used in electrometallizing vehicle Download PDFInfo
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- CN100460659C CN100460659C CNB200710065427XA CN200710065427A CN100460659C CN 100460659 C CN100460659 C CN 100460659C CN B200710065427X A CNB200710065427X A CN B200710065427XA CN 200710065427 A CN200710065427 A CN 200710065427A CN 100460659 C CN100460659 C CN 100460659C
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Abstract
The electrically controlled multi point sequential ejection system for electrically ejected vehicles using gasoline and gas comprises electrically controlled gasoline ejection system and the electrically controlled gas ejection system which comprises the supply gas storage, pressure adjust and control, with the gas storage composed of charge valve, gas volume display, gas storage bottle and bottle valve, the pressure adjust composed of electromagnetic valve and pressure adjuster, control part composed of oil-gas changeover switch, constant open relay, constant close relay gas ECU, shared track ejection valve, sending out gasoline ECU ejection signal to gasoline ECU which ejects fuel to engine cylinder through fuel ECU according to the program control shared track ejection fuel of the gasoline ECU. It solves the difficulty of redevelopment of fuel ECU, reduces development cost, without changing original electric ejection vehicle oil supply system and engine and vehicle structure, with the drivability and dynamic feature of the vehicle basically unchanged, with reliable safety and convenient maintenance.
Description
Technical field
The present invention relates to a kind of electro jet car use dual-purpose fuel is the electronic control multi-point sequential injection system of gasoline and combustion gas (rock gas or liquefied petroleum gas (LPG))
Background technique
Realize that electro jet car uses combustion gas/gasoline dual-purpose fuel, its motor is to have compatibility to the basic demand of gas/oil fuel, and when using combustion gas (one of rock gas or liquefied petroleum gas (LPG)) fuel, its exhaust emissions also must reach the requirement of respective standard regulation.External automobile vendor directly produces and sells combustion gas/gasoline electronic control multi-point sequential injection system variable fuel vehicle, and present automobile vendor combustion gas at home/gasoline electronic control multi-point sequential injection system variable fuel vehicle still is in development, when user's desire is used combustion gas/gasoline dual-purpose fuel automobile, must reequip accordingly motor, set up the gas supply device.This air feeder has generally adopted automatically controlled and and the air mixing continuous injection technology of combustion gas at present.But this technology exists geneogenous defective, is example with the Jetta automobile, and because of the resonant cavity of the suction tude of its motor is bigger, and its manifold is longer, if adopt electric-controlled gas and air mixing continuous injection scheme, can't solve the tempering problem of motor technically.For for " Santana's 3000 types ", " Beijing modern times " and class automobiles such as " east wind Yueda enterprise are inferior ", because its motor is 4 valves, this structure exhaust efficiency is very high, but its air inlet overlapping angle is corresponding bigger.If when motor inlet and outlet valve opening is overlapping, just will inevitably produce tempering if any combination gas in the suction tude, the generation of engine flashback just influences its efficient, and also makes its discharge value not reach the requirement of respective standard.Because can't overcoming of above-mentioned technical problem, in fact also cause transformation, the use of domestic combustion gas/gasoline dual-purpose fuel automobile to be obstructed, it directly has influence on the use of rock gas or liquefied petroleum gas (LPG) clean energy resource and the further improvement of big and medium-sized cities atmosphere quality.
Summary of the invention
Technical solution of the present invention: overcome the deficiency that prior art exists, providing a kind of electro jet car to use dual-purpose fuel is the electronic control multi-point sequential injection system of gasoline and combustion gas (rock gas or liquefied petroleum gas (LPG)), solved the difficulty that the combustion gas control unit is developed separately again, make full use of the scheme of former car gasoline control unit, greatly reduce exploitation and user cost, do not change original electro jet car oil supply system and motor and automobile integral arrangement, can meet every detection requirement of electro jet car, and the driving performance of automobile and dynamic property are constant, and safe and reliable and easy to maintenance.
Technical solution of the present invention is: it is the electronic control multi-point sequential injection system of gasoline and combustion gas (rock gas or liquefied petroleum gas (LPG)) that electro jet car uses dual-purpose fuel, comprise: the gasoline electric-controlling injection system that former car carries, its characteristics are also to comprise the combustion gas electric-controlling injection system, wherein the combustion gas electric-controlling injection system comprises storage air feed part, pressure regulation part, control section, storage gas supply part branch comprises: gas charging valve, air cylinder and cylinder valve, gas charging valve is connected to cylinder valve, the cylinder valve valve body is connected with air cylinder, and cylinder valve exports oil-gas change-over switch to; The pressure-regulating portion branch comprises: solenoid valve and pressure governor, cylinder valve is connected with an end of solenoid valve by burning line, the other end of solenoid valve is connected with an end of pressure governor, the other end of pressure governor is connected with common rail injection valves by the low pressure gas transmission line, and solenoid valve is controlled by oil-gas change-over switch by normally closed relay; Control section comprises: oil-gas change-over switch, normally opened relay, normally closed relay, combustion gas control unit ECU, common rail injection valves and lambda sensor, oil-gas change-over switch respectively with normally opened relay, normally closed relay, sensor is connected with automobile storage battery, normally opened relay also is connected with combustion gas control unit ECU with automobile storage battery, normally closed relay also is connected with petrol pump with solenoid valve, combustion gas control unit ECU is except that with normally opened relay is connected, also with lambda sensor, gasoline control unit ECU, common rail injection valves is connected with gasoline injection valve, gasoline control unit ECU is the control unit ECU configuration of former car, only the output of gasoline control unit ECU fuel injection signal is connected to combustion gas control unit ECU, lambda sensor is connected to gasoline ECU through combustion gas control unit ECU, and gasoline ECU sprays combustion gas (one of rock gas or liquefied petroleum gas (LPG)) to engine cylinder by combustion gas control unit ECU according to the control program control common rail injection valves of gasoline control unit ECU itself.
When described oil-gas change-over switch was in the gasoline state, gasoline control unit ECU directly passed through the lambda sensor picked up signal through combustion gas control unit ECU; When oil-gas change-over switch was in combustion gas state (one of rock gas or liquefied petroleum gas (LPG)), combustion gas control unit ECU directly produced the lambda sensor simulate signal and exports gasoline control unit ECU to.
Described liquefied petroleum gas cylinder valve comprises gas inlet, gas outlet, safety valve, combustion gas transfusion stop valve, liquid level sensor, combustion gas indusion tube and float, gas inlet is connected to gas charging valve, gas outlet is connected to the combustion gas transfer line, safety valve is positioned on the cylinder valve valve body, play the safety protection effect, the output and the input of combustion gas transfusion stop valve opening and closing combustion gas indusion tube; Float one end links to each other with combinaing valve body by rotating axle, and after the cylinder valve valve body was fixed on the air cylinder, float floated over and is full of on the combustion gas liquid level, and moves along with the lifting of liquid level; Sensor is positioned on the dial plate of cylinder valve valve body surface band liquid level display pointer or is positioned on the pipeline of cylinder valve, and its output signal is connected to oil-gas change-over switch, is used to show gas-storing capacity at that time, also can see the liquid storage amount of gas cylinder at that time by range estimation.Liquid level sensor is formed by blocking piece, 1 photoelectric diode and 4 infrared photocells.
Described natural gas cylinder valve comprises air inlet/outlet, cylinder valve and pressure relief valve (PRD), and air inlet/outlet is connected with cylinder valve, pressure relief valve (PRD), and pressure transducer is connected on the gas cylinder air inlet/outlet.
Described combustion gas control unit ECU comprises the injection pulse width driver module, when needs adopt combustion gas (one of rock gas or liquefied petroleum gas (LPG)) work, oil-gas change-over switch is allocated to the combustion gas state, make normally opened relay work, the output of gasoline control unit ECU fuel injection signal is connected to combustion gas control unit ECU, be that signal inputs to the injection pulse width driver module, the injection pulse width driver module outputs signal to common rail injection valves, makes combustion gas gas in injection catheter is injected into corresponding each cylinder body of motor.
The present invention's advantage compared with prior art is:
(1) the present invention is on the gasoline electric-controlling injection system basis that original former car carries, increased the combustion gas electric-controlling injection system, and gasoline control unit ECU is the control unit ECU configuration of former car, only the output of gasoline control unit ECU fuel injection signal is connected to combustion gas control unit ECU, gasoline control unit ECU sprays combustion gas (rock gas or liquefied petroleum gas (LPG)) to engine cylinder by combustion gas ECU according to the control program control common rail injection valves of gasoline ECU itself, therefore solved the difficulty that combustion gas control unit ECU develops separately again, make full use of the scheme of former car gasoline control unit ECU, exploitation and user cost have been reduced, do not change original electro jet car oil supply system and motor and automobile integral arrangement, can meet every detection requirement of electro jet car, and the driving performance of automobile and power performance are constant substantially, and safe and reliable and easy to maintenance.
(2) combustion gas control unit ECU of the present invention removes compatible electro jet car computer (gasoline ECU), promptly keep the EFI oil supply system constant outside, it also has the switching controls module and with autogenous cutting die change piece, 15 seconds functions such as start delay module, oxygen sensor signal emulation module, water temperature testing module, injection pulse width driver module and injection pulse width modulation module; And nozzle quantity equates with the motor car engine number of cylinders in the fuel gas injection valve, the open and close of nozzle are subjected to the control of combustion gas control unit ECU, can accurately realize identical with former gasoline injection sequential, therefore can not produce tempering, and make the engine exhaust emission value be better than Chinese III, the IV motor vehicle exhaust emission requirement of limiting the quantity of.
(3) the present invention is because combustion gas control unit ECU is compatible mutually with former gasoline control unit ECU, and behind employing the present invention, the automobile power decay is lower than 5% of former gasoline car, has good power character.Therefore, can be after the operating mode of monitoring motor, the intelligent apparatus according to the travelling state and the fuel gas that requires to provide suitable of automobile are supplied with has self diagnosis and adaptation function.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is a liquefied petroleum gas cylinder valve structural representation of the present invention;
Fig. 3 is the liquid level sensor electrical schematic diagram in the liquefied petroleum gas cylinder valve among the present invention
Fig. 4 is the natural gas cylinder valve arrangement schematic representation among the present invention
Fig. 5 is the oil-gas change-over switch electrical schematic diagram that combustion gas tolerance shows that contains among the present invention;
Fig. 6 is the electricity of the combustion gas control unit ECU among the present invention theory diagram;
Fig. 7 is the injection pulse width driver module schematic diagram among the combustion gas control unit ECU of the present invention;
Fig. 8 is the injection pulse width modulation module schematic diagram among the combustion gas control unit ECU of the present invention;
Fig. 9 is switching controls among the combustion gas control unit ECU of the present invention and pressure autogenous cutting die change piece schematic diagram;
Figure 10 is the water temperature testing module schematic diagram among the combustion gas control unit ECU of the present invention;
Figure 11 is 15 seconds start delay module principle figure among the combustion gas control unit ECU of the present invention;
Figure 12 is the oxygen sensor signal emulation module schematic diagram among the combustion gas control unit ECU of the present invention;
Figure 13 is the program flow diagram of gasoline control unit ECU control combustion gas control unit ECU of the present invention.
Embodiment
As shown in Figure 1, the present invention is made up of gasoline electric-controlling injection system and combustion gas electric-controlling injection system that former car carries, and wherein the combustion gas electric-controlling injection system is a focused protection content of the present invention, and it comprises storage air feed part, pressure regulation part, control section.Storage gas supply part branch comprises gas charging valve 1, air cylinder 2, cylinder valve 3, gas charging valve 1 is connected to cylinder valve 3, cylinder valve 3 valve bodies are connected with air cylinder 2, be connected to air cylinder 2 on the valve body of cylinder valve 3 or by pipeline, the output of cylinder valve 3 is connected to oil-gas change-over switch 5 (containing combustion gas tolerance shows) through automatically controlled wire harness 4; The pressure-regulating portion branch comprises: solenoid valve 13 and pressure governor 12, the combustion gas of cylinder valve 3 outputs is connected with an end of solenoid valve 13 by burning line 14, the other end of solenoid valve 13 is connected with an end of pressure governor 12, the other end of pressure governor 12 is connected to common rail injection valves 16 by low pressure gas transmission line 11, common rail injection valves 16 links to each other by the air intake duct 22 of LPG gas blowing conduit 27 and each cylinder of motor 19, and solenoid valve 13 also is controlled by oil-gas change-over switch 5 by normally closed relay 7; Control section comprises: oil-gas change-over switch 5, normally opened relay 6, normally closed relay 7, combustion gas control unit ECU8, common rail injection valves 16 and lambda sensor 18, oil-gas change-over switch 5 respectively with normally opened relay 6 normally closed relays 7, normally opened relay 6 also is connected with combustion gas control unit ECU 8 with automobile storage battery 21, normally closed relay 7 is connected with petrol pump 9 with solenoid valve 13 respectively, combustion gas control unit ECU8 is except that with normally opened relay 6 is connected, also with lambda sensor 18 and gasoline control unit ECU 15, common rail injection valves 16 is connected with gasoline injection valve 17, gasoline control unit ECU15 is the ECU configuration of former car, only the output of gasoline control unit ECU 15 fuel injection signals is connected to combustion gas control unit ECU8, lambda sensor 18 is connected to gasoline control unit ECU15, gasoline control unit ECU15 sprays combustion gas to motor 19 combusted cylinders by combustion gas control unit ECU8 according to the former own control program control of gasoline control unit ECU15 common rail injection valves 16, and by outlet pipe 26 exhausting air.Solenoid valve 13 can be selected liquefied petroleum gas (LPG) solenoid valve or high-pressure natural gas solenoid valve for use according to the combustion gas different in kind that uses.
As shown in Figure 2, when using liquefied petroleum gas (LPG) LPG, cylinder valve 3 comprises gas inlet 31, gas outlet 32, safety valve 33, combustion gas transfusion stop valve 34, sensor 35 combustion gas indusion tubes 36 and float 37, gas inlet 31 is connected to gas charging valve 1, gas outlet 32 is connected to combustion gas transfer line 14, liquefied petroleum gas (LPG) solenoid valve 13 is positioned on the pipeline 14, safety valve 33 is positioned on the valve body of cylinder valve 3, play the safety protection effect, the output and the input of combustion gas transfusion stop valve 34 opening and closing combustion gas indusion tubes 36; Float 37 1 ends link to each other with the valve body of cylinder valve 3 by rotating axle, and after the valve body of cylinder valve 3 was fixed on the air cylinder 2, float 37 floated on the liquid level that is full of liquefied petroleum gas (LPG), and moves along with the lifting of liquid level; Sensor 35 is positioned on the dial plate of valve body surface band liquid level display pointer of air valve cylinder valve 3 or is positioned on the pipeline of cylinder valve 3, and its output signal is connected to oil-gas change-over switch 5, is used to show gas-storing capacity at that time.
As shown in Figure 3, sensor 35 is connected in series with 1 photodiode after by 4 infrared photocell parallel connections, and they directly accept the light signal of photodiode.The number that infrared photocell shows is being represented the combustion gas liquid level height, i.e. gas-storing capacity, and be transferred to oil-gas change-over switch 5 and show tolerance.
As shown in Figure 4, when using compressed natural gas CNG, cylinder valve 3 includes rock gas air inlet/outlet 38, hand stop valve 39, safety valve PRD 40 and pressure transducer 41, air inlet/outlet 38 is connected to gas charging valve 1 by pipeline, be connected to gas transmission line 14 by threeway simultaneously, pressure transducer 41 is positioned on the gas transmission line 14, and its output signal is connected to oil-gas change-over switch 5, is used to show the gas-storing capacity of gas cylinder.
As shown in Figure 5, be oil-gas change-over switch 5 electrical schematic diagrams.D10 is the red beacon that combustion gas is about to use up, and the number that D11, D12, D13 and D14 tutorial light show is successively being represented combustion gas residual capacity, i.e. gas-storing capacity.D15 and D16 represent oily gentle status indicator lamp respectively.
As shown in Figure 6, combustion gas control unit ECU 8 of the present invention is a core component, it mainly is made of injection pulse width driver module 86, when needs adopt combustion gas work, oil-gas change-over switch 5 is allocated to combustion gas (one of rock gas or liquefied petroleum gas (LPG)) state, make normally opened relay 6 work that the combustion gas signal is inputed to injection pulse width driver module 86, injection pulse width driver module 86 outputs signal to common rail injection valves 16, and combustion gas (rock gas or liquefied petroleum gas (LPG)) is injected in the motor 19.When using fuel oil, after entering injection pulse width driver module 86, directly export the cylinder gasoline injection valve of petrol engine 19 from the fuel injection signal of gasoline ECU15 to, fuel injection signal is without any processing.
As shown in Figure 6, combustion gas control unit ECU 8 can also comprise switching controls and force with autogenous cutting die change piece 82, water temperature testing module 84,15 seconds start delay modules 85, when oil-gas change-over switch 5 when using the LPG state, give switching controls and force to use autogenous cutting die change piece 82 input signals, make switching controls and force and start water temperature testing module 84 with autogenous cutting die change piece 82, whether water temperature testing module 84 detects water temperature and meets the requirements, determine whether 15 seconds start delay modules 85 work, when meeting the requirements, switching controls and pressure output signal to the relay of injection pulse width driver module 86 with autogenous cutting die change piece 82, and make 86 work of injection pulse width driver module; When there was the conversion of pressure input the outside, above-mentioned described each module was not all worked, and directly entered the relay of modulation injection pulse width driver module 86, and injection pulse width driver module 86 is worked, according to match test, set in advance injection pulse width modulation module 81, make it satisfy the car load requirement.
Be illustrated in figure 7 as injection pulse width driver module 86, when using the gasoline state, after entering injection pulse width driver module 86, will directly export petrol engine to by relay K 1 from the fuel injection signal of gasoline ECU15, signal is without any processing; When using LPG or CNG, from the fuel injection signal of gasoline ECU15 after entering injection pulse width driver module 86, relay K 1 is under switching signal control, fuel injection signal is given the triode power amplification circuit of injection pulse width modulation module 81 and back one-level, under Q1, R11, D12 and pulse-width signal acting in conjunction, produce the signal that exports snifting valve to from injection pulse width modulation module 81.Generally determine that according to the number of cylinders of motor injection pulse width driver module 86 signals export the quantity of common rail injection valves 16 to.
As shown in Figure 8, be the schematic diagram of injection pulse width modulation module 81.This module is used to modulate the size of injection pulse width driver module 86 pulsewidths, cooperates injection pulse width driver module 86 to output signal to common rail injection valves 16 together, and common rail injection valves 16 is carried out work according to this signal.In this module, pulse-width signal is by the input of the A of intergrated circuit U71 end, and Q holds output, by U75 signal is carried out power amplification after, as pulse-width modulated output signal.Wherein the size of pulsewidth is determined by R71, C71.
Be illustrated in figure 9 as the switching controls module and force to use autogenous cutting die change piece 82, when oil-gas change-over switch 5 when using LPG or CNG state, give the switching controls module and force to use autogenous cutting die change piece 82 input signals, make the switching controls module and force and start water temperature testing module 84 with autogenous cutting die change piece 82, whether water temperature testing module 84 detects water temperature and meets the requirements, determine whether 15 seconds start delay modules 85 work, when meeting the requirements, U85 produces control signal corresponding, and after amplifying, export the relay of injection pulse width driver module 86 to, make 86 work of injection pulse width driver module; When there is the conversion of pressure input the outside, force switching signal directly to act on U85 by U83, produce the control output signal, input to the switching controls module and force signal and ignored water temperature testing module 84, injection pulse width modulation 85 with autogenous cutting die change piece 82, the relay of direct injection pulsewidth driver module 86 makes 86 work of injection pulse width driver module, according to match test, set in advance injection pulse width modulation module 81, make it satisfy the engine performance requirement.
As shown in figure 10, water temperature testing module 84 is mainly used in water temperature and detects, and after water temperature met the requirements of temperature, signal exported injection pulse width modulation module 81 to.The judgement that whether water temperature is reached the temperature that requires is finished by U95, and the temperature value size is determined by R554.
15 seconds start delay modules 85 as shown in figure 11, after motor was started by state of rest, the A input end of intergrated circuit U101 obtained high level signal, and the output of Q end maintained high level after the negative impulse in 15 seconds.Therefore, motor will be earlier by gasoline state work 15 seconds, carry out the oil gas conversion then and export module 81 to, start water temperature testing module 84, when water temperature does not reach the requirement temperature, switching controls module and the pressure auxiliary time delay module work of autogenous cutting die change piece 82, after work 15 seconds, carry out the oil gas conversion then and export module 81 to, start water temperature testing module 84, when water temperature does not reach the requirement temperature, switching controls module and the pressure auxiliary time delay module work of autogenous cutting die change piece 82, after work 15 seconds, circulation so repeatedly is till detecting water temperature and reaching requirement.
Be oxygen sensor signal emulation module 83 as shown in figure 12, when system used the gasoline state, the signal that obtains from lambda sensor was directly inputted into gasoline ECU15; When the switching controls module with force to input to oxygen sensor signal emulation module 83 with 82 work of autogenous cutting die change piece, when promptly system used LPG or CNG, if oxygen sensor signal is arranged, then the signal from the lambda sensor acquisition was directly inputted into gasoline ECU15.If there is not oxygen sensor signal, at this moment oxygen sensor signal emulation module 83 will produce the lambda sensor simulate signal, and export gasoline ECU15 to according to the tach signal that obtains, thereby make the gasoline ECU can proper functioning.In this module, the U115 function is to transfer tach signal to pulse signal, adjusts frequency by U114, U115 pulse signals then, and signal is amplified, as the lambda sensor simulate signal output of simulation.
As shown in figure 13, the working procedure of combustion gas control unit ECU 8 of the present invention is: when using as single-fuel (one of rock gas or liquefied petroleum gas (LPG)), open engine ignition switch, start delay circuit 85 work in 15 seconds, at this moment press gasoline state operation 15 seconds, and see according to water temperature testing module 84 data whether it continues to postpone; After water temperature reaches requirement, notice switching controls and pressure are closed oil pump and gasoline injection system with autogenous cutting die change piece 82, start delay module 85 quit work in 15 seconds, oxygen sensor signal emulation module 83, water temperature testing module 84, injection pulse width driver module 86 and injection pulse width modulation module 81 are started working, after oxygen sensor signal emulation module 83 obtains tach signal, produce the lambda sensor simulate signal and give gasoline ECU8, injection pulse width driver module 86 is after obtaining gasoline ECU15 jet drive signal, behind injection pulse width modulation module 81, drive common rail injection valves 16 work; When using under the gasoline state, work with autogenous cutting die change piece 82 by switching controls and pressure, force conversion use combustion gas (one of rock gas or liquefied petroleum gas (LPG)) work, start delay module 85 was not worked in 15 seconds, and other module works on by the above mode.
Working procedure of the present invention: carry out combustion gas (one of compressed natural gas CNG or liquefied petroleum gas (LPG) LPG) storage in the air cylinder 2, gas-storing capacity is transferred to oil-gas change-over switch 5 through sensor 35 by automatically controlled wire harness 4 and shows tolerance, and oil-gas change-over switch 5 also has the oil gas conversion function simultaneously.When the needs air feed, oil-gas change-over switch 5 is in combustion gas (one of rock gas or liquefied petroleum gas (LPG)) state, and normally opened relay 6 and normally closed relay 7 are worked, petrol pump 9 in the conversion petrol tank 23, make petrol pump 9 fuel cut-offs, use gaseity by being transformed into oil condition, oil-gas change-over switch 5 is opened solenoid valve 13 by normally closed relay 7 simultaneously, combustion gas is air feed as follows: for liquefied petroleum gas (LPG), LPG flows into the gasification of reducing pressure in the pressure governor 12 (pressure governor 12 is the decompression evaporator type) through gas transmission line 14, and the LPG after the gasification is in low pressure gas transmission line 11 enters common rail injection valves 16; For rock gas, CNG flows into pressure governor 12 through gas transmission line 14 by high-pressure natural gas solenoid valve 13 and reduces pressure (pressure governor 12 is high pressure relief device type), reduces pressure after low pressure gas transmission line 11 enters in the common rail injection valves 16.Gasoline control unit ECU15 output signal is sprayed combustion gas through combustion gas control unit ECU8 control common rail injection valves 16, makes its combustor inner cylinder that enters motor 19, and by outlet pipe 26 exhausting air.Gasoline control unit ECU15 is former car ECU, and various inputs all do not change, and only oxygen sensor signal 18 is obtained input by combustion gas control unit ECU8.Motor 19, air intake duct 22, gasoline injection valve 17, outlet pipe 26, lambda sensor 18, petrol tank 23, petrol pump 9, storage battery 21 and gasoline control unit ECU15 are former gasoline automobile configuration, connect, position and performance parameter are not done any change, the control command of gasoline control unit ECU15 output is a fuel injector control signal that triggers common rail injection valves 16 work, in this fuel injector control signal, gasoline control unit ECU15 has controlled the pulsewidth and the moment of signal, fuel injection quantity is by the decision of the pulsewidth of fuel injection signal, and injection timing depends on the revolution of motor 19 and the control strategy of the used gasoline control unit of former car ECU15 at that time.The control strategy here is that ECU is used for making automatical control system a whole set of program by predetermined pattern control motor operation, be stored in advance among the ROM of former car gasoline control unit ECU15, gasoline control unit ECU15 will change various operating modes over to according to input signal, and prominent next variation is dealt with in preparation at any time, interrupt or change the another kind of operating mode that is fit to over to, gasoline electric-controlling injection system among the present invention and combustion gas electric-controlling injection system work alone after can changing mutually, do not make a difference mutually.Combustion gas control unit ECU8 is exactly pulsewidth and a moment signal of exporting to gasoline according to gasoline control unit ECU15, injection pulse width driver module 86 in combustion gas control unit ECU8 and injection pulse width modulation module 81, drive common rail injection valves 16, thereby realize the Petrol And Fuel Gas Electrical Controlled Multipoint Sequential Injection System Using For Electrojet Car proper functioning.Different motor car engines all have own gasoline control unit ECU15, the present invention fully uses the reliability of former car gasoline control unit ECU15 control system and the adaptability of all kinds of driving cycles, do not change original electro jet car oil supply system and motor and automobile overall structure, meet every detection requirement of electro jet car, the driving performance of automobile and power performance are constant substantially, and safe and reliable and easy to maintenance.
Claims (10)
1. the electro jet car gasoline and the combustion gas electronic control multi-point sequential injection system that use, comprise: the gasoline electric-controlling injection system that former car carries, it is characterized in that also comprising the combustion gas electric-controlling injection system, wherein the combustion gas electric-controlling injection system comprises storage air feed part, pressure regulation part and control section, wherein storing up the gas supply part branch comprises: gas charging valve (1), air cylinder (2) and cylinder valve (3), gas charging valve (1) is connected to cylinder valve (3), cylinder valve (3) valve body is connected on the air cylinder (2) by pipeline, and the output of cylinder valve (3) is connected to oil-gas change-over switch (5) through automatically controlled wire harness (4); The pressure-regulating portion branch comprises: solenoid valve (13) and pressure governor (12), cylinder valve (3) is connected with an end of solenoid valve (13) by gas transmission line (14), the other end of solenoid valve (13) is connected with an end of pressure governor (12), the other end of pressure governor (12) is connected with common rail injection valves (16) by low pressure gas transmission line (11), and solenoid valve (13) is controlled by oil-gas change-over switch (5) by normally closed relay (7); Control section comprises: oil-gas change-over switch (5), normally opened relay (6), normally closed relay (7), combustion gas control unit ECU (8), common rail injection valves (16) and lambda sensor (18), oil-gas change-over switch (5) respectively with normally opened relay (6), normally closed relay (7) is connected with automobile storage battery (21), normally opened relay (6) also is connected with combustion gas control unit ECU (8) with automobile storage battery (21), normally closed relay (7) is connected with petrol pump (9) with solenoid valve (13) respectively, combustion gas control unit ECU (8) respectively with normally opened relay (6), lambda sensor (18), common rail injection valves (16) is connected with gasoline injection valve (17), gasoline control unit ECU (15) fuel injection signal output in the gasoline electric-controlling injection system that former car carries is connected to combustion gas control unit ECU (8), gasoline control unit ECU (15) will spray combustion gas and deliver to motor (19) cylinder by control program control common rail injection valves (16) work of combustion gas control unit ECU (8) according to gasoline control unit ECU (15) itself.
2. gasoline and combustion gas electronic control multi-point sequential injection system that electro jet car according to claim 1 uses, it is characterized in that: when described oil-gas change-over switch (5) was in the gasoline state, gasoline control unit ECU (15) directly passed through lambda sensor (18) picked up signal through combustion gas control unit ECU (8); When oil-gas change-over switch (5) was in the combustion gas state, when needs lambda sensor simulate signal, combustion gas control unit ECU (8) directly produced the lambda sensor simulate signal and exports gasoline control unit ECU (15) to.
3. gasoline and combustion gas electronic control multi-point sequential injection system that electro jet car according to claim 1 uses, it is characterized in that: when using liquefied petroleum gas (LPG) LPG, described cylinder valve (3) comprises gas inlet (31), gas outlet (32), safety valve (33), combustion gas transfusion stop valve (34), sensor (35), combustion gas indusion tube (36) and float (37), gas inlet (31) is connected to gas charging valve (1), gas outlet (32) is connected to combustion gas gas transmission line (14), liquefied petroleum gas (LPG) solenoid valve (13) is positioned on the gas transmission line (14), safety valve (33) is positioned on the valve body of cylinder valve (3), play the safety protection effect, the output and the input of combustion gas transfusion stop valve (34) opening and closing combustion gas indusion tube (36); Float (37) one ends link to each other with the valve body of cylinder valve (3) by rotating axle, and after the valve body of cylinder valve (3) was fixed on the air cylinder (2), float (37) floated on the liquid level that is full of liquefied petroleum gas (LPG), and moves along with the lifting of liquid level; Sensor (35) is positioned on the dial plate of valve body surface band liquid level display pointer of cylinder valve (3) or is positioned on the pipeline of cylinder valve (3), and its output signal is connected to oil-gas change-over switch (5) and is used to show at that time gas-storing capacity.
4. gasoline and combustion gas electronic control multi-point sequential injection system that electro jet car according to claim 1 uses, it is characterized in that: when using compressed natural gas CNG, described cylinder valve (3) includes rock gas air inlet/outlet (38), hand stop valve (39), safety valve PRD (40) and pressure transducer (41), air inlet/outlet (38) is connected to gas charging valve (1) by pipeline, be connected to gas transmission line (14) by threeway simultaneously, pressure transducer (41) is positioned on the gas transmission line (14), and its output signal is connected to oil-gas change-over switch (5).
5. gasoline and combustion gas electronic control multi-point sequential injection system that electro jet car according to claim 3 uses is characterized in that: described sensor (35) composes in parallel by blocking piece, four infrared photocells (Q1-Q4) series connection back and a photoelectric diode.
6. gasoline and combustion gas electronic control multi-point sequential injection system that electro jet car according to claim 1 uses, it is characterized in that: described combustion gas control unit ECU (8) mainly comprises injection pulse width driver module (86), when needs adopt combustion gas work, oil-gas change-over switch (5) is connected to the combustion gas state, normally opened relay (6) work, the output of gasoline control unit ECU (15) fuel injection signal is connected to combustion gas control unit ECU (8), be that signal inputs to injection pulse width driver module (86), injection pulse width driver module (86) outputs signal to common rail injection valves (16), makes combustion gas gas in injection catheter (27) is injected into motor (19).
7. gasoline and combustion gas electronic control multi-point sequential injection system that electro jet car according to claim 6 uses, it is characterized in that: also be connected to injection pulse width modulation module (81) at described injection pulse width driver module (86) input end, be used to modulate the size of injection pulse width driver module (86) pulsewidth.
8. gasoline and the combustion gas electronic control multi-point sequential injection system that uses according to claim 6 or 7 described electro jet cars, it is characterized in that: described combustion gas control unit ECU (8) also comprises switching controls and with autogenous cutting die change piece (82), water temperature testing module (84), 15 seconds start delay modules (85), when oil-gas change-over switch (5) when using the combustion gas state, give switching controls and with autogenous cutting die change piece (82) input signal, make switching controls and start water temperature testing module (84) with autogenous cutting die change piece (82), whether water temperature testing module (84) detects water temperature and meets the requirements, determine 15 seconds the start delay module (85) whether work, when meeting the requirements, switching controls and output signal to the relay of injection pulse width driver module (86) with autogenous cutting die change piece (82), and make injection pulse width driver module (86) work; When there was the conversion of pressure input the outside, each above-mentioned module was not all worked, and directly entered the relay of modulation injection pulse width driver module (86), and made injection pulse width driver module (86) work.
9. gasoline and combustion gas electronic control multi-point sequential injection system that electro jet car according to claim 8 uses, it is characterized in that: be connected to oxygen sensor signal emulation module (83) in switching controls with the output terminal of autogenous cutting die change piece (82), be used to produce the lambda sensor simulate signal, and export gasoline control unit ECU (15) to.
10. gasoline and combustion gas electronic control multi-point sequential injection system that electro jet car according to claim 1 and 2 uses, it is characterized in that: described combustion gas control unit ECU (8) and oil-gas change-over switch (5) also need bonding, so that constitute the automatical control system signal circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200710065427XA CN100460659C (en) | 2007-04-13 | 2007-04-13 | Electric control multi-point sequent injection system for gasoline and gas used in electrometallizing vehicle |
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| CNB200710065427XA CN100460659C (en) | 2007-04-13 | 2007-04-13 | Electric control multi-point sequent injection system for gasoline and gas used in electrometallizing vehicle |
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| CN100460659C true CN100460659C (en) | 2009-02-11 |
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| CNB200710065427XA Expired - Fee Related CN100460659C (en) | 2007-04-13 | 2007-04-13 | Electric control multi-point sequent injection system for gasoline and gas used in electrometallizing vehicle |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102072033B (en) * | 2010-12-17 | 2013-07-31 | 河南欧意环保科技有限公司 | Sequential fuel gas injection system with on-board diagnostics (OBD) system for automobile |
| CN102192034B (en) * | 2011-05-03 | 2013-07-24 | 清华大学 | Correcting method for electromagnetic valve of common-rail diesel injector |
| CN102748144A (en) * | 2012-07-18 | 2012-10-24 | 奇瑞汽车股份有限公司 | Gasoline and CNG (compressed natural gas) dual-fuel control system |
| CN106526386A (en) * | 2016-12-06 | 2017-03-22 | 重庆科技学院 | Automobile fuel injection test system |
| DE102018210999A1 (en) * | 2018-07-04 | 2020-01-09 | Robert Bosch Gmbh | Fuel delivery device for cryogenic fuels |
| CN110374752B (en) * | 2019-06-10 | 2024-03-22 | 常州科普动力机械有限公司 | Electromagnetic valve controllable low-loss generator control circuit |
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Assignee: Beijing Bolken Equipment Corporration Assignor: Xu Huanen Contract fulfillment period: 2008.12.10 to 2013.12.10 Contract record no.: 2008990001456 Denomination of invention: Electric control multi-point sequent injection system for gasoline and gas used in electrometallizing vehicle Granted publication date: 20090211 License type: Exclusive license Record date: 20081215 |
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