CN1815004A - Control system of four-fuel engine - Google Patents

Abstract

The present abstract relates to an invention, pertaining to a control system of four-fuel engine in the automotive industry field, which mainly includes: a set of sensors (S), that collect information from some points in the vehicle engine system; an electronic command unit ECU(1), which receives and processes the signals from the sensors to produce the command signals as their handling response; and, a set of actuators (A), that receive the command signals, and act at each part in the control system of the vehicle engine to adjust them, accordingly achieving to provide for the vehicle a fuel mixed the natural gas VNG, pure gasoline, hydrated alcohol, or Brazilian gasoline with 22% ethanol.

Description

The control system of four-fuel engine

This description report relates to a patent of invention, be applied to the control system of four-fuel engine in the automobile industry field, can discern the employed fuel type of vehicle in its exploitation, comprise hydrate alcohol or contain the Brazilian gasoline of 22% anhydrous alcohol or the 4th kind of pure gasoline or natural gas used for automobile-VNG, discern with the VNG of sensor software logic association and discern other three's gasoline by the application sensors software logic, ethanol and gasoline and ethanol fuel, need not use physical sensors to back three (SFS), in addition, the acquiescence work of the vehicle engine system that provides is VNG, and work in specified conditions following times when detecting to non-VNG fuel or engine system, can adjust engine system automatically, or under the autonomous decision of vehicle driver during by suitable manual switchover, engine system will be adjusted on other fuel that work in replacement VNG; After detecting fuel type, its work of sensor software logic of the described VNG/SFS of being associated with further is associated with the software and hardware system of the electron spraying system of routine, so as to engine system being adjusted under the good state of runnability, comprise: speed, absolute pressure, throttle valve position, phase place, air temperature, rotation, detonation, water temperature, oxygen proportion in the gaseous combustion fuel, and other parameters make the vehicle engine system fuel injection reach its desirable operation.

The applicant is traditional MANUFACTURER of vehicle electric fuel injection system aspect, design recently and exploitation and current at a kind of ejecting system of sale for ethanol and Fuel Petroleum and their mixture (SFS) usefulness, this is another patent application project, and number is PI0202226-5.

Yet,,, accomplished this fuel is satisfied energy demand as a kind of suitable alternative (VNG), especially for the car field by means of discovery and applicability thereof to certain rock gas in Brazil.

So the system that patented subject matter proposes is that except gasoline, ethanol and their mixture, system can " confirm " utilization of pure gasoline, and comprises a function module and be used for cura generalis rock gas.Like this, can in the supply of four kinds of different fuels, make one's options: hydrate alcohol, mix the Brazilian gasoline of 22% anhydrous alcohol, other commercially available products of pure gasoline-non-oxidation resultant, and CNG-compressed natural gas.Under the CNG occasion, need the hardware of being determined by the applicant that is used for the vehicle true(-)running is set, it also is the theme of this patent.

In this report, vehicle fuel is identified by following abbreviation:

The CNG=compressed natural gas

The automobile-used natural gas of VNG=

The automobile-used methane gas of VMG=

So, use the facility SFS sensor of configuration already, can discern pure gasoline, thereby identification adding vehicle is the gasoline that does not have ethanol by the algorithmic system that systematic learning (1) and engine warming up (2) are made comparisons.

The precondition that detects pure gasoline is that: SFS indicates, must be on 13.4 for AF (3) greater than the preheating of " X ", and systematic learning is on " % ".System should adopt 14.5 AF, and by the study of increment size bucking-out system.

In this occasion, AF value from 9 to 13.4 should be linear, is not linear between 13.4 to 14.5, and high limit value is in 14.5, and this value has indicated the boundary of mixture.Though, have the mixture and pure gasoline two class A fuel As of gasoline and ethanol, the AF value be not for 9 to 13.4 before, the control system state remains unchanged.

Unless SFS indicates the AF value of demand and be lower than 13.4, otherwise system should remain on 14.5 the AF value, and when the AF of demand value is lower than 13.4, and system should give up the 14.5AF value of fixed limit and heavy getting back on the flexibility and changeability.

All SFS checking system and window thereof remain unchanged.

To this, this report provides:

1-systematic learning=, be used to change the variation of the fuel injection amount that causes because of the propellant composition change by the departure that control unit of engine provides.

2-preheating=engine warming up stage.

3-AF=air/fuel ratio, pure gasoline are 14.5, and straight alcohol is 9, and the fuel combination of gasoline and ethanol is 14.5＞AF＞9, and the gasoline that wherein contains 22% anhydrous alcohol is 13.4.

So purpose of the present invention provides automatic engine control system, that is to say that control system always works under the VNG fuel, unless one of following condition (Fig. 5 to Fig. 9) occurs:

1-VNG Bottle ﹠ Can sky;

2-uses and to surpass the gas volume of determining the working time of VNG, and 7kg for example under this specific occasion, is as the criterion by occasion one by one, makes system again with the liquid fuel work regular hour, in order to avoid spray head stops up;

3-when needing big power/torque, for example, when needing top speed or climbing;

3.1) under this occasion, system should move with liquid fuel in case of necessity, then gets back to usual VNG working state;

3.2) need torque to learn that these information elements can supply ECU (e-command unit) to use by the position of identification accelerator pedal or by the pressure of identification inlet collector;

When 4-driver only wants to travel with gasoline, can connect gasoline under this kind occasion and select key button.

When any top situation did not take place, system moved with rock gas.

For this reason, dispose some specific control commands among the ECU, comprising:

1.VNG specific AF value 17: 1;

2. the benefit and the compensation of special VNG spray head;

3. because specific fuel map or increment graph that the difference filling of VNG fuel provides;

4.AF the increment fate map of ratio;

5. specific injection phase (being primarily aimed at full load);

6. closed loop transfer;

7. fuel transition and low thermophase should not present difference.

System also has the ability to infer, whether the VNG amount in the cylinder finishes, that is to say, as variable KO ₂(fuel ejection) when only keeping a period of time to adjust, this indicates the emitted dose that needs to increase VNG.

Lack VNG fuel.KO under the traction situation ₂When one section " X " seems bad in the time, change on the liquid fuel when flame-out next time.

The sensor logic of VNG composition.Because methane (CH ₄) composition changes, so each gas station has different VNG to constitute.This will cause runnability bad undesired with fuel.For solving this difference problem,, can compensate the percentage difference of methane gas in the VNG according to a series of formula of the SFS that illustrates in the patent PI 020226-5.

Formula 1-Q _Fuel=(Q _Air/ AF) * K

In the formula, Q _Fuel=fuel quantity;

Q _Air=air quantity;

AF=air/fuel ratio;

K=is from KQ ₂In the K that derives, be used to change current AF.

KO ₂Be a ratio, the change that is used to proofread and correct burner oil is to keep the mixture stoichiometry (formula 1 of SFS) of system's operation.

System can identify Q _FuelNeed to change, to keep the equation balance.Like this, after the supply of fuel of control system correction, can adjust AF to vehicle _VNGTo obtain correct balance, here, AF _VNGBe the air fuel ratio of fuel when being VNG.

VNG temperature transducer logic;

Temperature in the engine cylinder thereby the temperature of VNG are with the vehicle application varies.When VNG greatly occupies the volume equivalent of motor, can cause air input of engine by air " mistake " to read.

For addressing this problem, control system realizes the balance of equation 1 continuously, and obey slow time constant (about 3 minutes) because of the variation of engine temperature, control system can realize the simple equation balance in each phase Check-Out Time (for example 3 minutes), compensates the variation of engine efficiency thus.

Whenever variation that engine air or water or the two temperature take place greater than check in during the value of regulation, this algorithm just starts.

Under this kind occasion, the air quantity coefficient below when the equation balance, will changing in the AF ratio:

In the formula, Q _Fuel=fuel quantity

Q _Air=air quantity

The AF=air fuel ratio

KO ₂=with AF than related oxygen, to proofread and correct the variation of burner oil, keep the mixture stoichiometry (formula 1 of SFS) of system's operation.

KCH ₄=with AF than related methane gas

K _Temp=with AF than related temperature

Accompanying drawing shows the hardware elements in the four-fuel engine control system in the bright this patent project:

Fig. 1 shows the overall sketch plan of bright native system;

Fig. 2 shows bright spray head row group and fuel type selection figure;

Fig. 3 shows bright gas burning system feedback material pipe possible arrangement as an engine system part;

Fig. 4 shows bright total system's perspective view and the installation situation of each parts in vehicle; And

Fig. 5 to Fig. 9 shows the workflow diagram in several running statees of bright VNG system.

As shown in Figure 1, mainly comprise: set of sensors S, Information Monitoring on their some points from vehicle engine system according to engine control system hardware of the present invention; E-command unit ECU1, its based on fuel identification and the related software that sprays control play the control action of running performance parameter, can be from set of sensors S received signal, handle them suitably, produce command signal according to software; And, the actuator set A, they receive command signal, and the each several part of powered vehicle engine system is adjusted to applied fuel and the runnability state of working in them suitably.

To this, comprise among the set of sensors S: pressure transducer 2, air temperature sensor 3, TDC (bent axle) sensor 4, phase detector 5 (if desired), VNG Bottle ﹠ Can pressure transducer 6, λ break-make sensor 7, cooling-water temperature sensor 8, throttle valve position sensor (TPS) 9, vehicle speed sensor 10, air-conditioning demand sensor 11.They are subjected to the excitation of the state of mechanical. points out of the ordinary in the vehicle motor and work, and produce corresponding electrical signal, transfer among the ECU1 in mode known in the prior art.

ECU1 mainly comprises: suitable microprocessor, the related software that it comprises has: VNG and SFS sensor logic software, the identification of the fuel of the using when algorithm of its work and countermeasure are born, fuel comprise the mixture of natural gas used for automobile, pure gasoline, hydrate alcohol and Brazilian gasoline and 22% anhydrous alcohol; And, spray control software, it plays the control action of running performance state, oxygen proportion and other parameters on the algorithm of its work and the countermeasure in energy recognition speed, absolute pressure, throttle valve position, phase place, air temperature, rotation, detonation, water temperature, the gaseous fuel fuel; Microprocessor also comprises a storage, the data of the relating to parameters that its storage and control system are handled, during a whole set of engine running of vehicle, the software of microprocessor can be made interpolation to the data of storage according to fuel type that collects and the associated information of runnability state; And ECU1 also comprises auxiliary device, is used for reception, transmission and processes sensor signal and command signal.

Mainly comprise in the actuator set A: the device 12 of the alternate supplies load relevant with each actuator, spark coil 13, SFS-VNG spray head row organizes 15, and Bottle ﹠ Can cut-out magnetic valve 17.

Miscellaneous part in addition has: stand by lamp 22, water temperature lamp 23, revolution counter 24, ECU register 26, and operational diagnostics connector 27.

Show among Fig. 2 that bright SFS-VNG spray head row organizes 15, its related fuel selection device mainly comprises: selection device 30, and it is made of relay, selects the fuel of SFS system (gasoline, ethanol) spray head or the association of VNG (natural gas used for automobile) spray head automatically; And, selection device 31, it is made of a key button of abandoning VNG, is used for manually selecting fuel.SFS that these two selection devices are interior with being in ECU1 and specific program and the equity in the VNG sensor logic software are associated.

Fig. 3 shows the feedback material pipe 40 of prescribed gas system spray head, and it has the standard design that is applied to any gas burning system, is made of two-part, can be plastics or metal, can support the VNG spray head.Combustion gas PICO spray head 15 can make each engine cylinder implement to spray and make control VNG.Control module is selected for the fuel that will spray, and feedback material pipe 40 provides liquid or gaseous fuel when selecting with the electric power mode.Information that ECU countercylinder pressure comes and the information of coming from fuel Bottle ﹠ Can (ethanol or gasoline) receive.According to employed fuel, ECU to the information that instrument panel transmission receives, informs the liquid that just using or the fuel quantity of gas by CAN communication protocol.

Fig. 4 shows the layout of bright native system, comprising: be placed on the VNG Bottle ﹠ Can 50 that 300 on the correct position clings to air pressure according to type of vehicle, Bottle ﹠ Can solenoid valve 51, VNG air supply pipe 52, VNG pressure governor 53, and VNG feedback material pipe 40 and spray head 15.

Technical specification is as follows:

Working pressure: 0-250 crust

First pressure stage: 12.7 crust

Second stage rated pressure: 2.5 crust+MAP

Temperature range :-40 ℃-+120 ℃

Tension force solenoid valve power supply: 12V or 24V

Air intake filter diameter: 50mm

Maximum gas flow: 30kg/h

Weight: 2100g

Whole SFS sensor software logic verification systems is born the supplies management for gasoline, ethanol and gasoline and alcohol mixture, and its management window remains unchanged to following situation:

1) be the fuel combination of gasoline and 0% to 100% ethanol according to following true affirmation fuel, the A/F stoichiometric proportion that is gasoline mixed fuel is different with the amount of alcohol that comprises in the fuel combination, can obtain appropriate data analysis from the fuel combustion information that lambda probe provides; In the fuel combination, A/F=14.5 is corresponding to pure gasoline, and 14.5＞A/F＞9 are corresponding to the mixture of gasoline and ethanol, and A/F=9 is corresponding to ethanol;

2) by discharge time T with spray head _InjFunction as fuel combination is determined fuel quantity, and formula 1 is arranged:

$Q_{\mathrm{Comb}}=\frac{Q_{\mathrm{Air}}}{A/F_{\mathrm{Misture}}}$

Tinj? _Avcrage＝Q _Comb×Gain×(1+/-KO2_FIL)

In the formula, Q _Comb=fuel quantity

Q _Air=air quantity

A/F _Mixture=according to stoichiometric air fuel ratio, that is to say, be the ratio value of air quality divided by fuel mass, wherein, and pure gasoline A/F=14.5, anhydrous alcohol A/F=9, and the fuel combination of those gasoline and ethanol is 14.5＞A/F＞9.

The A=air

F=fuel

T _{Inj Average}=average discharge time

G _ain＝

KO ₂=be used for the numerical variable of balance A/F ratio, so that fuel maintains on the stoichiometric level.This title is provided by the inventor.

O ₂=oxygen

3) determine initiation process as the fuel combination function:

$\mathrm{AVA}\_{\mathrm{BASE}}_{\left(\mathrm{new}\right)}=\underset{\mathrm{alcoho}}{\mathrm{AVA}\_{\mathrm{BASE}}_{0\%}}+K_2\%\left[\underset{\mathrm{alcohol}}{\mathrm{Mapa}\_{\mathrm{avanco}}_{100\%}}-\underset{\mathrm{alcohol}}{\mathrm{Mapa}\_{\mathrm{avanco}}_{0\%}}\right]$

In the formula, the basic process of AVA_BASE=

K ₂=A/F _MixtureFunction

4) determine the A/F value that loop ends of engine operation and another circulation begin, formula 2 arranged:

A/F _{mixture(current)}＝A/F _{mixture(prior)}*K ₁

$Q_{\mathrm{comb}}=\frac{Q_{\mathrm{air}}}{A/F_{\mathrm{mixture}\left(\mathrm{current}\right)}}$

Tinj? _médio＝Q _comb*Gain*(1+/-0％)

5) SFS algorithm

$\mathrm{If}$ $\left\{\begin{array}{c}\mathrm{KO}2\_\mathrm{fil}>\mathrm{Level}1(\%)\\ \mathrm{KO}2\_\mathrm{fil}<\mathrm{Level}2(\%)\end{array}\right.$

$\mathrm{Then}\left\{\begin{array}{c}{K}_1=\frac{1}{(1+{\mathrm{KO}}_2\_\mathrm{fil})}\\ \mathrm{Calculation\; of\; A}/F\\ {\mathrm{KO}}_2\_\mathrm{fil}=0\end{array}\right.$

6) with other control items of motor function, have: systematic learning, preheating, torque control, fuel transition, Red. torque dynamic process, starting, Bottle ﹠ Can container as A/F.

In Shuo Ming the essential structure, the control system of Patent project of the present invention can made change aspect the details such as material, size, construction and/or configuration in the above, and they be unable to do without the protection domain of being applied for a patent partially.

Claims (15)

1. " control system of four-fuel engine " mainly comprises: set of sensors (S), and they are Information Monitoring on some suitable points from vehicle engine system; E-command unit ECU (1), it receives and handles the signal from each sensor, produces command signal according to processing result; And, actuator set (A), they receive each command signal, affact suitably on the control system of vehicle engine system, to implement various adjustment.Control system is characterised in that e-command unit ECU (1) comprises relevant software: VNG sensor logic software is used to discern natural gas used for automobile fuel VNG; And SFS sensor logic software is used for identification and comprises three kinds of fuel such as pure gasoline, hydrate alcohol and Brazilian gasoline and 22% anhydrous alcohol mixture; Other has the injection control software as the runnability state function, other the relevant parameters of a whole set of engine operation that are used for the ratio of recognition speed, absolute pressure, throttle valve position, phase place, air temperature, rotation, detonation, water temperature, gaseous combustion fuel oxygen and do not need physical sensors.Go up by the signal of receiving from set of sensors (S) for this ECU (1), can make interpolation to them suitably with the data related and add: natural gas used for automobile, pure gasoline, hydrate alcohol, and the mixture of Brazilian gasoline and 22% anhydrous alcohol with following fuel.In addition, ECU (1) but the runnability state of application memory as the function of this interpolation, generation is used for the command signal of actuator set (A), on the appropriate section that acts on control system in a whole set of motor of vehicle, they are adjusted to work in employed fuel, and adjust detected runnability state, to reach the purpose that makes the desirable operation of a whole set of motor of vehicle.

2. the four-fuel engine control system of claim 1 is characterized in that, supplies VNG (acquiescence fuel) when starting automatically, one of following situation occurs until working to: 1-VNG Bottle ﹠ Can sky; 2-uses the time of VNG operation to surpass pairing definite gas volume; 3-needs big power/torque, for example needs the top speed or the climbing of automobile; 4-driver only wants to use gasoline.Described situation 2) by relevant sensor senses, use for ECU through canned data after the algorithm process, produce the command signal that is used for relevant actuator, make the time of liquid fuel, in order to avoid spray head stops up at every kind of occasion supply certain-length; Described situation 3) by the position of accelerator pedal or by the gas pressure identification that enters trap, use for ECU through canned data after the algorithm process, produce the command signal that is used for relevant actuator, so that supply fluid fuel when essential is then got back to usual VNG working state; And, situation 4) by a location recognition that makes the key button that system selects between gas or liquid fuel, it is operated by the vehicle driver, use for ECU through canned data after the algorithm process, produce the command signal that is used for relevant actuator, make the vehicle driver can independently determine supply gas or liquid fuel.

3. claim 1 or 2 four-fuel engine control system is characterized in that, as variable KO ₂(fuel ejection) only keeps a period of time can adjust and show when needs increase the emitted dose of VNG, can infer that the VNG amount in the cylinder has exhausted; KO under the traction situation ₂When one section " X " seems bad in the time and change on the liquid fuel in stopping working next time, can confirm to lack VNG fuel, this class effect can be realized that canned data is used for ECU and actuator by the combination of right sensors and algorithm.

4. claim 1 or 2 four-fuel engine control system is characterized in that, are proofreaied and correct because of methane (CH by VNG component sensor logic ₄) the composition difference that changes the VNG cause constitutes, canned data is used for ECU after algorithm process.

Formula 1-Q _Fuel=(Q _Air/ AF) * K

In the formula, Q _Fuel=fuel quantity

Q _Air=air quantity

The AF=air fuel ratio

K=is according to KO ₂The K that derives is used to change current A/F; KO ₂Be a ratio, the change that is used to proofread and correct burner oil is to keep the mixture stoichiometry (formula 1 of SFS) of system's operation; Under correct combination of sensor and actuator, its device can balance VNG in the difference of methane gas %.

5. claim 1 or 2 four-fuel engine control system, it is characterized in that, VNG temperature transducer logic includes algorithm process, canned data is used for ECU, under correct combination of sensor and actuator, can constantly reach the balance of equation 1, and change according to engine temperature and to be approximately 3 minutes time constant, accomplish in phase Check-Out Time, to reach equational balance, thereby can compensate the variation of engine efficiency; Whenever the variation of engine air temperature or water temperature or both change and when being higher than the value of adjusting period stipulation, described sensor just works, under this kind occasion, the air quantity coefficient below when equilibrium equation, will changing in the ratio:

In the formula, Q _Fuel=fuel quantity

Q _Air=air quantity

The AF=air fuel ratio

KO ₂=with AF than related oxygen, to proofread and correct the variation of burner oil, keep the mixture stoichiometry (formula 1 of SFS) of system's operation.

KCH ₄=with AF than related methane gas

K _Temp=with AF than related temperature

6. the four-fuel engine control system of any in the claim 1 to 5 is characterized in that, has several to be applied to the specific control command of VNG among the ECU (e-command unit), comprising:

1) the specific AF value of VNG is 17: 1;

2) benefit and the compensation of special VNG spray head;

3) because specific fuel map or increment graph that the difference filling of VNG fuel provides;

4) the increment fate map of AF ratio;

5) specific injection phase (especially full load);

6) closed loop transfer;

7) fuel transition and low thermophase.

7. the four-fuel engine control system of claim 1 is characterized in that, whole SFS software logic checking systems is born the supplies management for gasoline, ethanol and gasoline and alcohol mixture, and its management window remains unchanged in fact for following situation:

1) confirms that fuel is the fuel combination of gasoline and 1% to 100% ethanol, it is according to being, the A/F stoichiometric proportion of gasoline mixed fuel is different with the amount of alcohol that comprises in the fuel combination, can obtain appropriate data analysis from the fuel combustion information that lambda probe provides; In the fuel combination, A/F=14.5 is corresponding to pure gasoline, and 14.5＞A/F＞9 are corresponding to the mixture of gasoline and ethanol, and A/F=9 is corresponding to ethanol;

2) by discharge time T with spray head _InjFunction as fuel combination is determined fuel quantity, and formula 1 is arranged:

$Q_{\mathrm{Fuel}}=\frac{Q_{\mathrm{air}}}{{\mathrm{AF}}_{\mathrm{Mixture}}}$

Tinj? _Average＝Q _Fuel.Gain·(1+/-KO ₂_FIL)

In the formula, Q _Fuel=fuel quantity

Q _Air=air quantity

A/F _Mixture=air fuel ratio with regard to the stoichiometric number of fuel combination that is to say, is the ratio value of air quality divided by fuel mass, wherein, pure gasoline A/F=14.5, anhydrous alcohol A/F=9, and the fuel combination of those gasoline and ethanol is 14.5＞A/F＞9.

The A=air

F=fuel

T _{Inj average}=average discharge time

Gain＝

KO ₂=be used for the numerical variable of balance A/F ratio, so that burning maintains on the stoichiometric level.This title is provided by the inventor.

O ₂=oxygen

3) determine the process of detonating as the fuel combination function:

$\mathrm{AVA}\_{\mathrm{BASE}}_{\left(\mathrm{NEW}\right)}=\mathrm{AVA}\_\underset{\mathrm{alcohol}}{\mathrm{BAS}{E}_{0\%}}+K_2\%*[\mathrm{Map}\_\underset{\mathrm{alcohol}}{\mathrm{progres}{s}_{100\%}}-\underset{\mathrm{alcohol}}{\mathrm{Map}\_\mathrm{progr}}{\mathrm{esso}}_{\%}]$

In the formula, the basic process of AVA_BASE=

K ₂=A/F _MixtureFunction

4) determine the A/F value that loop ends of engine operation and another circulation begin, formula 2 arranged:

A/F _{Mixture(current)}＝A/F _{Mixture(prior)}*K _t

$Q_{\mathrm{Fuel}}=\frac{Q_{\mathrm{air}}}{{A/F}_{\mathrm{Mixture}\left(\mathrm{current}\right)}}$

Tinj? _Average＝Q _Fuel·Gain·(1+/-0％)

5) SFS algorithm

IF KO ₂_fil＞Level?1(％)

KO ₂_fil＜Level?2(％)

Then? $K_1=\frac{1}{(1+{\mathrm{KO}}_2\_\mathrm{fil})}$

Calculation?of?A/F

KO ₂_fil＝0

6) with other control items of motor function, have: systematic learning, preheating, torque control, fuel transition, torque red. dynamic process, starting, Bottle ﹠ Can container as A/F.

8. the four-fuel engine control system of claim 1 is characterized in that, the hardware of control system mainly comprises: set of sensors S, Information Monitoring on their some points from vehicle engine system; E-command unit ECU (1), it based on as the function of runnability parameter, be used for fuel identification and spray the related software of control, the signal that the receiving sensor S set is come is handled the back suitably and is produced command signal according to software; And, the actuator set A, they receive command signal, affact on the various piece of vehicle engine system, they are adjusted to work under used fuel and the runnability state.

9. the four-fuel engine control system of claim 8, it is characterized in that, set of sensors S comprises following sensor: pressure transducer (2), air temperature sensor (3), TDC (bent axle) sensor (4), phase detector (5) (if desired), VNG Bottle ﹠ Can pressure transducer (6), λ break-make sensor (7).Cooling-water temperature sensor (8), throttle valve position sensor (TPS) (9), vehicle speed sensor (10), air-conditioning demand sensor (11).They are subjected to the excitation of the state of mechanical. points out of the ordinary in the vehicle motor and work, and produce corresponding electrical signal, are transferred on the ECU (1).

10. four burn engine control system of claim 8, it is characterized in that, ECU (1) mainly comprises: suitable microprocessor, the related software that it comprises has: VNG and SFS sensor logic software, algorithm wherein and countermeasure are born the identification to application fuel, and fuel comprises the mixture of natural gas used for automobile, pure gasoline, hydrate alcohol and Brazilian gasoline and 22% anhydrous alcohol; And, spray control software, it plays the control action of running performance state, oxygen proportion and other parameters in algorithm wherein and countermeasure energy recognition speed, absolute pressure, throttle valve position, phase place, air temperature, rotation, detonation, water temperature, the gaseous combustion fuel; Microprocessor also comprises a storage, the data of the relating to parameters that its storage and control system are handled, during a whole set of engine running of vehicle, the software of microprocessor can be made interpolation to canned data according to the fuel type and the associated information of runnability state that collect; And ECU (1) also comprises auxiliary device, is used for reception, transmission and processes sensor signal and command signal.

11. the four-fuel engine control system of claim 8, it is characterized in that, mainly contain in the composition of actuator set A: the device (12) of the alternate supplies load relevant with each actuator, spark coil (13), SFS-VNG spray head row organizes (15), Bottle ﹠ Can cut-out magnetic valve (17), decompressor cut-out magnetic valve (18), dormant activation device (19), cooling fan relay (20), fan (21), and air condition compressor (25).

12. the four-fuel engine control system of claim 8 is characterized in that, also comprises miscellaneous part in the actuator set A: stand by lamp (22), water temperature lamp (23), revolution counter (24), ECU register (26), and operational diagnostics connector (27).

13. the four-fuel engine control system of claim 11, it is characterized in that, SFS-VNG spray head row group (15) associated fuel selection device mainly comprises: selection device (30), it comprises a relay, automatically select fuel, promptly use the spray head (gasoline, ethanol) or the VNG spray head (natural gas used for automobile) of SFS system; And, selection device (31), it comprises a key button of manually selecting fuel, so as to abandoning VNG.SFS that these two selection devices are interior with being in ECU (1) and specific program and the countermeasure in the VNG sensor logic software are associated.

14. the four-fuel engine control system of claim 11, it is characterized in that, gas fuel system spray head feedback material pipe (40) has the standardized designs that can be applicable to any gas fuel system, is made of two plastics or metal parts, and they support the VNG spray head.

15. the four-fuel engine control system of claim 8 is characterized in that it comprises: the VNG Bottle ﹠ Can (50) that is positioned over the correct position place according to type of vehicle; Bottle ﹠ Can solenoid valve (51), VNG air supply pipe (52), VNG pressure governor (53), and VNG feedback material pipe (40) and spray head (15).

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