CN108087135A - The control method and device of dual-fuel vehicle - Google Patents
The control method and device of dual-fuel vehicle Download PDFInfo
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- CN108087135A CN108087135A CN201711348494.2A CN201711348494A CN108087135A CN 108087135 A CN108087135 A CN 108087135A CN 201711348494 A CN201711348494 A CN 201711348494A CN 108087135 A CN108087135 A CN 108087135A
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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
- F02D19/0639—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]
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2438—Active learning methods
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/3094—Controlling fuel injection the fuel injection being effected by at least two different injectors, e.g. one in the intake manifold and one in the cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/1502—Digital data processing using one central computing unit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
-
- 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 the control methods and device of a kind of dual-fuel vehicle, belong to Car Electronic Control field.Method includes：Terminal determines the Current fuel of engine in the dual-fuel vehicle by the ECU；According to the Current fuel, from the correspondence of fuel mark and control signal, the corresponding control signal of the Current fuel is obtained, which includes at least one in emitted dose, the angle of ignition and the torque of the Current fuel；The self study coefficient of the control signal is obtained from the memory space of the ECU；According to the self study coefficient of the control signal He the control signal, the engine is controlled to work with the self study coefficient of the control signal He the control signal.Since terminal can identify Current fuel, and the mark of the fuel based on Current fuel, the corresponding control signal of the Current fuel is obtained, so as to improve the accuracy of control dual-fuel vehicle.
Description
Technical field
The present invention relates to Car Electronic Control technical field, the control method and dress of more particularly to a kind of dual-fuel vehicle
It puts.
Background technology
It is well known that gasoline is the main fuel of most of vehicles.However, continually developing and profit with natural gas resource
With its use cost of natural gas, because is relatively low, is increasingly becoming one of main fuel of vehicle.In many dual-fuel vehicles, it can incite somebody to action
Vapour oil and gas is as the fuel for providing power.In dual-fuel vehicle travels way, when gasoline hungry, dual-fuel vehicle
It is changeable using natural gas as provide power fuel.
In existing dual-fuel vehicle, typically increase natural airgun controller in original gasoline is the vehicle of fuel,
When the fuel by dual-fuel vehicle is needed to be switched to natural gas by gasoline, dual-fuel vehicle is obtained by the controller of natural gas
The control signals such as the emitted dose of the atomizer in gasoline controller and/or the angle of ignition are controlled the control signal as natural gas
The control signal of device is inputted in natural airgun controller, so that dual-fuel vehicle provides power by the burning of natural gas.
In correlation technique, in the implementation of the present invention, inventor has found to have at least the following problems in correlation technique：
The above process is actually that directly natural gas is controlled using the control signal in gasoline controller, however,
Since the physical characteristic of vapour oil and gas is there are bigger difference, the control signal of gasoline controller may be with the physics of natural gas
Characteristic is not consistent, so that accuracy is poor during control vehicle.
The content of the invention
In order to solve problem of the prior art, the present invention provides the control methods and device of a kind of dual-fuel vehicle.Skill
Art scheme is as follows：
In a first aspect, providing a kind of control method of dual-fuel vehicle, the method is applied in dual-fuel vehicle, described
Dual-fuel vehicle includes at least an electronic controller ECU, the described method includes：
By the ECU, the Current fuel of engine in the dual-fuel vehicle is determined；
According to the Current fuel, from the correspondence of fuel mark and control signal, the Current fuel pair is obtained
The control signal answered, the control signal include at least one in emitted dose, the angle of ignition and the torque of the Current fuel；
The self study coefficient of the control signal is obtained from the memory space of the ECU；
According to the self study coefficient of the control signal and the control signal, the engine is controlled to believe with the control
Number and the self study coefficient of the control signal work.
In a kind of possible design, the dual-fuel vehicle further includes the atomizer of control gasoline and controls natural gas
Snifting valve, the atomizer and the snifting valve are connected with the ECU；
Wherein, the low side of the snifting valve is connected with the ECU, and the flash of the snifting valve is connected with H bridges；It is described
Method further includes：
When receiving the out code of control snifting valve, the snifting valve is closed by the H bridges.
It is described according to the Current fuel in a kind of possible design, it is closed from fuel mark and the corresponding of control signal
In system, the corresponding control signal of the Current fuel is obtained, including：
According to the Current fuel, the corresponding calibration scale of the Current fuel is obtained；
The current rotating speed of the dual-fuel vehicle and current air inflow are obtained, the current combustion is searched from the calibration scale
Material corresponding control signal under current rotating speed and current air inflow, in the calibration scale fuel mark of associated storage fuel and
The fuel corresponding control signal under multiple rotating speeds and multiple air inflows.
In a kind of possible design, the self study coefficient according to the control signal and the control signal, control
It makes after the engine worked with the self study coefficient of the control signal and the control signal, the method is also wrapped
It includes：
By the ECU, the current voltage signal of the lambda sensor of the dual-fuel vehicle is obtained；
According to the current voltage signal, from the voltage signal and the correspondence of the self study coefficient of control signal
In, determine the self study system of control signal corresponding current control signal under current voltage signal of the dual-fuel vehicle
Number；
The self study coefficient of the current control signal is stored into the memory space of the ECU.
It is described by the ECU in a kind of possible design, determine the current combustion of engine in the dual-fuel vehicle
Material, including：
By the ECU, the current flag signal of the flag bit of the dual-fuel vehicle is obtained；
According to the current flag signal, in the correspondence identified from marking signal and fuel, the current mark is determined
The corresponding fuel of fuel mark is determined as the Current fuel of the engine by the corresponding fuel mark of will signal.
Second aspect provides a kind of control device of dual-fuel vehicle, and described device is applied in dual-fuel vehicle, described
Dual-fuel vehicle includes at least an electronic controller ECU, and described device includes：
Determining module for passing through the ECU, determines the Current fuel of engine in the dual-fuel vehicle；
First acquisition module, for according to the Current fuel, from the correspondence of fuel mark and control signal, obtaining
The corresponding control signal of the Current fuel is taken, the control signal includes emitted dose, the angle of ignition and the torsion of the Current fuel
It is at least one in square；
Second acquisition module, for obtaining the self study coefficient of the control signal from the memory space of the ECU；
Control module for the self study coefficient according to the control signal and the control signal, is started described in control
Machine is worked with the self study coefficient of the control signal and the control signal.
In a kind of possible design, the dual-fuel vehicle further includes the atomizer of control gasoline and controls natural gas
Snifting valve, the atomizer and the snifting valve are connected with the ECU；
Wherein, the low side of the snifting valve is connected with the ECU, and the flash of the snifting valve is connected with H bridges；It is described
Device further includes：
Closedown module, for when receiving the out code of control snifting valve, the jet to be closed by the H bridges
Valve.
In a kind of possible design, first acquisition module is additionally operable to according to the Current fuel, obtains described work as
The corresponding calibration scale of preceding fuel；The current rotating speed of the dual-fuel vehicle and current air inflow are obtained, is looked into from the calibration scale
Look for the Current fuel corresponding control signal under current rotating speed and current air inflow, associated storage fuel in the calibration scale
Fuel mark and the fuel corresponding control signal under multiple rotating speeds and multiple air inflows.
In a kind of possible design, described device further includes：
3rd acquisition module for passing through the ECU, obtains the current voltage letter of the lambda sensor of the dual-fuel vehicle
Number；
The determining module is additionally operable to according to the current voltage signal, from oneself of the voltage signal and control signal
In the correspondence of learning coefficient, control signal corresponding current control under current voltage signal of the dual-fuel vehicle is determined
The self study coefficient of signal processed；
Memory module, for storing the self study coefficient of the current control signal into the memory space of the ECU.
In a kind of possible design, the determining module is additionally operable to, by the ECU, obtain the dual-fuel vehicle
Flag bit current flag signal；According to the current flag signal, in the correspondence identified from marking signal and fuel,
It determines the corresponding fuel mark of the current flag signal, the fuel is identified into corresponding fuel and is determined as the engine
Current fuel.
In the embodiment of the present invention, terminal determines the Current fuel of engine in the dual-fuel vehicle by the ECU；According to
The Current fuel from the correspondence of fuel mark and control signal, obtains the corresponding control signal of the Current fuel, the control
Signal processed includes at least one in emitted dose, the angle of ignition and the torque of the Current fuel；It is obtained from the memory space of the ECU
The self study coefficient of the control signal；According to the self study coefficient of the control signal He the control signal, control the engine with
The self study coefficient of the control signal and the control signal works.Since terminal can identify Current fuel, and it is based on working as
The fuel mark of preceding fuel, obtains the corresponding control signal of the Current fuel, so as to improve the accurate of control dual-fuel vehicle
Property.
Description of the drawings
Fig. 1 is a kind of control method flow chart of dual-fuel vehicle provided in an embodiment of the present invention；
Fig. 2 is a kind of control method flow chart of dual-fuel vehicle provided in an embodiment of the present invention；
Fig. 3 is a kind of control structure schematic diagram provided in an embodiment of the present invention；
Fig. 4 is a kind of control structure schematic diagram provided in an embodiment of the present invention；
Fig. 5 is a kind of snifting valve control process schematic provided in an embodiment of the present invention；
Fig. 6 is a kind of control structure schematic diagram provided in an embodiment of the present invention；
Fig. 7 is a kind of control device block diagram of dual-fuel vehicle provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Fig. 1 is a kind of control method flow chart of dual-fuel vehicle provided in an embodiment of the present invention, and this method is applied double
In fuel vehicle, which includes at least an electronic controller ECU, and the executive agent of this method can be terminal,
The terminal can be car-mounted terminal, as shown in Figure 1, this method includes：
Step 101：By the ECU, the Current fuel of engine in the dual-fuel vehicle is determined；
Step 102：According to the Current fuel, from the correspondence of fuel mark and control signal, the current combustion is obtained
Expect corresponding control signal, which includes at least one in emitted dose, the angle of ignition and the torque of the Current fuel；
Step 103：The self study coefficient of the control signal is obtained from the memory space of the ECU；
Step 104：According to the self study coefficient of the control signal He the control signal, the engine is controlled to believe with the control
Number and the self study coefficient of the control signal work.
In a kind of possible design, which further includes the spray of the atomizer and control natural gas of control gasoline
Air valve, the atomizer and the snifting valve are connected with the ECU；
Wherein, the low side of the snifting valve is connected with the ECU, and the flash of the snifting valve is connected with H bridges；This method is also wrapped
It includes：
When receiving the out code of control snifting valve, which is closed by the H bridges.
In a kind of possible design, this is according to the Current fuel, in the correspondence from fuel mark with control signal,
The corresponding control signal of the Current fuel is obtained, including：
According to the Current fuel, the corresponding calibration scale of the Current fuel is obtained；
The current rotating speed of the dual-fuel vehicle and current air inflow are obtained, the Current fuel is searched from the calibration scale and is being worked as
Preceding rotating speed and the corresponding control signal of current air inflow, the fuel mark of associated storage fuel and the fuel are more in the calibration scale
Corresponding control signal under a rotating speed and multiple air inflows.
In a kind of possible design, this controls the hair according to the self study coefficient of the control signal He the control signal
After motivation is worked with the self study coefficient of the control signal He the control signal, this method further includes：
By the ECU, the current voltage signal of the lambda sensor of the dual-fuel vehicle is obtained；
According to the current voltage signal, from the correspondence of the voltage signal and the self study coefficient of control signal, really
The self study coefficient of control signal corresponding current control signal under current voltage signal of the fixed dual-fuel vehicle；
The self study coefficient of the current control signal is stored into the memory space of the ECU.
In a kind of possible design, the Current fuel of engine in the dual-fuel vehicle, bag by the ECU, should be determined
It includes：
By the ECU, the current flag signal of the flag bit of the dual-fuel vehicle is obtained；
According to the current marking signal, in the correspondence identified from marking signal and fuel, determine that the current flag is believed
The fuel is identified the Current fuel that corresponding fuel is determined as the engine by number corresponding fuel mark.
In the embodiment of the present invention, terminal determines the Current fuel of engine in the dual-fuel vehicle by the ECU；According to
The Current fuel from the correspondence of fuel mark and control signal, obtains the corresponding control signal of the Current fuel, the control
Signal processed includes at least one in emitted dose, the angle of ignition and the torque of the Current fuel；It is obtained from the memory space of the ECU
The self study coefficient of the control signal；According to the self study coefficient of the control signal He the control signal, control the engine with
The self study coefficient of the control signal and the control signal works.Since terminal can identify Current fuel, and it is based on working as
The fuel mark of preceding fuel, obtains the corresponding control signal of the Current fuel, so as to improve the accurate of control dual-fuel vehicle
Property.
Fig. 2 is a kind of control method flow chart of dual-fuel vehicle provided in an embodiment of the present invention, and this method is applied double
In fuel vehicle, which includes at least an ECU (Electric Control Unit, electronic controller), the party
The executive agent of method can be terminal, which can be car-mounted terminal, as shown in Fig. 2, this method includes：
Step 201：Terminal determines the Current fuel of engine in the dual-fuel vehicle by the ECU.
Both fuel can have been used gasoline as in the embodiment of the present invention, in the dual-fuel vehicle to provide power, it can also
Power is provided using natural gas as fuel.The dual-fuel vehicle further includes the atomizer of control gasoline and controls natural gas
Snifting valve, as shown in figure 3, the atomizer and the snifting valve are connected with the ECU；The terminal can be carried out pair by the ECU
The control of snifting valve and atomizer, wherein, the low side of the snifting valve is connected with the ECU, and the flash of the snifting valve is connected with H bridges
It connects；When receiving the out code of control snifting valve, which is closed by the H bridges.
It should be noted that in actual use, the process of ECU control snifting valves can be：Control snifting valve
It opens, the normal jet of control snifting valve and control snifting valve are closed.However, in general, as shown in figure 4, snifting valve is low
Side generally connects ECU, and flash generally connects power supply, and snifting valve needs Peak (peak value) electric current that could normally open, and needs
Normal switching-off, each control process of the snifting valve and the relation of electric current, such as Fig. 5 just can be achieved in Discharge (leakage) electric current
Shown, in general, when Discharge electric currents are generally 0.7A, snifting valve can close.However, since snifting valve can be with
Increasing for access times and aging, the snifting valve of aging there can be the Discharge electric currents deferred reaction, i.e. Discharge
The snifting valve may not close in time when electric current is 0.7A, and electric current continues to be decreased to the closing that 0.3A could realize snifting valve,
The duration that snifting valve carries out jet can thus be extended so that ECU can not accurately control the snifting valve.For example, in double fuel
During vehicle carries out idling, jet time extends so that jet amount is excessive, causes dual-fuel vehicle unstable idle speed or even puts out
Fire.
And in the embodiment of the present invention, as shown in fig. 6, the flash of snifting valve is connected with H bridges, low side is still connected with ECU,
Since the H bridges are actually a DC motor control circuit, the conversion between direct current and alternating current can be realized.When double combustions
When truck needs to close snifting valve, terminal can be by controlling the opening and closing of the H bridges, so as to control the flash of the snifting valve
Instantaneous pressure drop is carried out, realizes that electric current reduces rapidly in snifting valve, even the snifting valve of aging, will not also generate delay, from
And realize ECU and jet hair is precisely controlled, so that terminal can accurately control the switching of fuel in dual-fuel vehicle
Process.
Wherein, as shown in fig. 6, terminal can set a H bridge to be connected with a snifting valve, each H bridges only corresponding one
A snifting valve.Terminal, which can also be set, is connected two or more snifting valves with a H bridge, can same time control by a H bridge
The driving of multiple snifting valves is made, so as to save control cost.
In this step, when the dual-fuel vehicle uses different fuel, the marking signal of the flag bit of the dual-fuel vehicle
Also differ.The terminal can be by the fuel that detects the marking signal of the flag bit to determine currently used.
Therefore, this step can be realized by following steps 2011-2012.
Step 2011：Terminal obtains the current flag signal of the flag bit of the dual-fuel vehicle by the ECU.
In the embodiment of the present invention, the flag bit of the dual-fuel vehicle is used to indicate the fuel mark of presently used fuel
Know, the flag bit of the dual-fuel vehicle can be the enabler flags position of one fuel.Specifically, terminal can pass through the double fuel
The ECU of vehicle sets the enabler flags position of fuel, and the corresponding marking signal association of different fuel under the enabler flags position is deposited
Storage is in the designated memory space of the ECU, and when engine uses one fuel in dual-fuel vehicle, which can make this
Energy flag bit is arranged to the corresponding id signal of the fuel.Terminal can according to the marking signal of the enabler flags position of the fuel,
Determine the presently used fuel of the dual-fuel vehicle.
By taking the flag bit of the dual-fuel vehicle is the enabler flags position of natural gas as an example, terminal obtains the fuel by ECU
Enabler flags position current flag signal, the current flag signal of the enabler flags position of the fuel is determined as dual-fuel vehicle
Flag bit current mark bit signal.
For example, the enabler flags position of natural gas can be defined as B_CngVavOpn, when gasoline is used, ECU by the ECU
The enabler flags position is resetted：B_CngVavOpn=0, that is to say the current marking signal is 0；When using same natural gas,
ECU by the enabler flags position position：B_CngVavOpn=1, that is to say the current marking signal is 1.Fuel mark can root
It needs to set and change according to user, the embodiment of the present invention is not specifically limited this.For example, fuel mark can be fuel
Title.
Step 2012：Terminal in the correspondence identified from marking signal and fuel, is determined according to the current marking signal
The fuel is identified the Current fuel that corresponding fuel is determined as the engine by the corresponding fuel mark of the current marking signal.
Terminal can set the fuel mark of simultaneously each fuel of associated storage and the corresponding flag bit letter of the fuel in advance
Number, when terminal gets the current marking signal, terminal obtains fuel mark and the mark from the designated memory space of ECU
The correspondence of will signal, according to the current marking signal, from the correspondence of fuel mark and marking signal, obtaining should
The corresponding fuel mark of current flag signal, it is that the dual-fuel vehicle is currently in use current which, which identifies corresponding fuel,
Fuel.
For example, when the enabler flags position of natural gas is defined as B_CngVavOpn by the ECU, if a terminal detects that should
Current flag signal is 0, which can be gasoline；If a terminal detects that the current mark bit is 1, the Current fuel
It can be natural gas.
Step 202：Terminal from the correspondence of fuel mark and control signal, is obtained and deserved according to the Current fuel
The corresponding control signal of preceding fuel, the control signal include at least one in emitted dose, the angle of ignition and the torque of the Current fuel
It is a.
In the embodiment of the present invention, terminal can demarcate the dual-fuel vehicle in advance in different rotating speeds and air inflow by experiment
When corresponding emitted dose, the angle of ignition and torque, it is and the fuel of the calibration is corresponding under multiple rotating speeds, multiple air inflows
Control signal is recorded in calibration scale.And the corresponding calibration scale of each fuel is stored in designated memory space, in this way, each
Fuel can correspond to a calibration scale.
Then this step can be realized by following steps 2021-2022.
Step 2021：Terminal obtains the corresponding calibration scale of the Current fuel according to the Current fuel.
In this step, terminal is identified according to the fuel of Current fuel, and fuel mark pair is selected from designated memory space
The calibration scale of the selection is determined as the corresponding calibration scale of Current fuel by the calibration scale answered.
Step 2022：Terminal obtains the current rotating speed of the dual-fuel vehicle and current air inflow, is searched from the calibration scale
The Current fuel is in current rotating speed and the corresponding control signal of current air inflow.
Wherein, associated storage fuel corresponding control signal under multiple rotating speeds and multiple air inflows in the calibration scale.Eventually
End by ECU obtains the current rotating speed of the dual-fuel vehicle and current air inflow every predetermined period, according to rotating speed before deserving with
Current air inflow selects current air inflow and the corresponding control signal of current rotating speed, by this in the corresponding calibration scale of the fuel
Control signal of the control signal selected as Current fuel.
Wherein, which can need to set and change according to user, and the embodiment of the present invention does not do this specific limit
It is fixed.For example, the predetermined period can be 30 seconds, 2 minutes etc..
Further, which is also based on the air-fuel ratio of engine, in advance by experimental calibration difference air-fuel ratio when,
Corresponding control signal under multiple rotating speeds and multiple air inflows, and the corresponding of air-fuel ratio, rotating speed, air inflow and control signal is closed
System is stored in the calibration scale of each fuel.In actual use, during different air-fuel ratios, fuel combustion situation also not phase in engine
Together, in order to reduce unnecessary waste, terminal the air-fuel ratio of engine can be arranged to fuel combustion it is complete when specified sky
Combustion ratio.Then terminal searches the Current fuel in current rotating speed and the step of the corresponding control signal of current air inflow from the calibration scale
Suddenly can also be：Terminal obtains the fuel in the case where specifying air-fuel ratio from the calibration scale, and current rotating speed and current air inflow correspond to
Control signal.
Generally, when air-fuel ratio is 1, fuel combustion is more complete in engine, and terminal can be searched from calibration scale
When air-fuel ratio is 1, emitted dose, the angle of ignition and/or the torque of current rotating speed and the corresponding Current fuel of current air inflow.
Step 203：Terminal obtains the self study coefficient of the control signal from the memory space of the ECU.
In the embodiment of the present invention, the self-study of the control signal of fuel when terminal has been previously stored history control fuel combustion
Practise coefficient, the self study coefficient be actually terminal according to the air-fuel and specified air-fuel ratio, the obtained control signal to fuel
Required regulation coefficient when being adjusted.
It should be noted that terminal can carry out self study by air-fuel ratio, ensured with reaching in every secondary control fuel
On the premise of system performance so that fuel combustion is complete, so as to reduce waste, saves fuel cost.The self study process is real
To be terminal on border judge the current combustion case of fuel by real-time testing air-fuel ratio, and is constantly adjusted based on the combustion case
Whole control signal, so that fuel combustion is complete.Specifically, the self study process can be：Terminal obtains double fuel by ECU
The current voltage signal of the lambda sensor of vehicle；According to the history voltage signal, from the self study of voltage signal and control signal
In the correspondence of coefficient, the control signal of the dual-fuel vehicle corresponding history control signal under history voltage signal is determined
Self study coefficient；The self study coefficient of the history control signal is stored into the memory space of the ECU.
Wherein, terminal judges air-fuel ratio by lambda sensor, which can be that terminal measures oxygen sensing
The voltage signal of device, the concentration of oxonium ion when which reflects fuel combustion.Generally, the numerical value of air-fuel ratio is different
When, the numerical value of the voltage signal also differs, and when air-fuel ratio is to specify numerical value, which is also given voltage.In order to
Improve the judging efficiency of terminal, terminal can test and demarcate the voltage letter of the corresponding lambda sensor of different air-fuel ratios in advance
Number, the combustion case of fuel is judged according to different air-fuel ratios, determines the self study coefficient of the control signal, and associated storage is more
The corresponding voltage signal of each air-fuel ratio and the self study coefficient of the corresponding control signal of the air-fuel ratio in a air-fuel ratio, from
And in this step, terminal can be directly based upon the voltage signal of the lambda sensor, between voltage signal and self study coefficient
In correspondence, the corresponding self study coefficient of the current voltage signal is determined.
It should be noted that terminal, during history controls fuel and carries out self study, terminal can be in real time based on sky
Fire the calculating than carrying out self study coefficient.For example, working as in the dual-fuel vehicle, system performance is preferable, and air-fuel ratio reaches specified air-fuel
Than when, terminal the self study coefficient can be arranged to specify numerical value.When air-fuel ratio is not reaching to specified air-fuel ratio, i.e. fuel fires
When burning incomplete, coefficient when which can be arranged so that control signal reaches specified control signal by terminal,
The specified control signal is signal when fuel combustion is complete in order to control.However, during entire self study, self study coefficient
Can constantly it change with the change of environmental factor, therefore, terminal can determine the combustion case of the fuel within a specified time,
Then terminal by the self study coefficient of history control signal storage to the step in the memory space of the ECU can with for：Terminal exists
Every preset duration in specified time, the self study coefficient of the history control signal is determined by above-mentioned realization method, so as to obtain
To multiple self study coefficients；The most self study coefficient of occurrence number in the plurality of self study coefficient is stored in the storage of ECU
In space.
Wherein, which can be terminal from a kind of fuel is begun to use to switching fuel or flame-out time,
The preset duration can need to set and change according to user, and the embodiment of the present invention is not specifically limited this.For example, this is default
Duration can be 1 minute, 3 minutes etc..
Step 204：Terminal controls the engine with the control according to the self study coefficient of the control signal He the control signal
Signal processed and the self study coefficient of the control signal work.
In this step, the product of the control signal and the self study coefficient of the control information is determined as the engine by terminal
Standard control signal, terminal control the engine to work with the standard control signal by ECU.
Specifically, the dual-fuel vehicle further includes the atomizer of control gasoline and the snifting valve of control natural gas, the oil spout
Mouth and the snifting valve are connected with the ECU；The control signal can include at least one in emitted dose, the angle of ignition and torque
It is a, emitted dose, Current fuel are included by the control signal to be illustrated exemplified by natural gas.Terminal obtains the self study of emitted dose
The product of the emitted dose and the self study coefficient of the emitted dose is determined as the standard emitted dose of engine, the terminal by coefficient
ECU sends standard injection by CAN (Controller Area Network, controller local area network) bus to engine
Amount, the engine receive the standard emitted dose by CAN bus, during engine combustion natural gas is done work, start
Machine control snifting valve carries out injection natural gas with the standard emitted dose.
Further, terminal can also realize the control to double fuel by closed-loop control, that is to say, terminal control hair
While motivation is worked, terminal can also detect the combustion case of fuel in engine in real time by lambda sensor, be based on
The voltage signal of lambda sensor feedback, to judge the combustion case of fuel, is completed according to combustion case to control signal
Self study process, is precisely controlled so as to fulfill to fuel combustion.
Wherein, which can be：Terminal determines the engine by the lambda sensor of the dual-fuel vehicle
Current voltage signal；According to the current voltage signal, from the voltage signal and the correspondence of the self study coefficient of control signal
In, determine the self study coefficient of control signal corresponding current control signal under current voltage signal of the dual-fuel vehicle；
The self study coefficient of the current control signal is stored into the memory space of the ECU.
It should be noted that this to the realization method of current control signal self study process with history control in step 204
The self study process of signal processed is consistent, no longer repeats one by one herein.
In the embodiment of the present invention, terminal determines the Current fuel of engine in the dual-fuel vehicle by the ECU；According to
The Current fuel from the correspondence of fuel mark and control signal, obtains the corresponding control signal of the Current fuel, the control
Signal processed includes at least one in emitted dose, the angle of ignition and the torque of the Current fuel；It is obtained from the memory space of the ECU
The self study coefficient of the control signal；According to the self study coefficient of the control signal He the control signal, control the engine with
The self study coefficient of the control signal and the control signal works.Since terminal can identify Current fuel, and it is based on working as
The fuel mark of preceding fuel, obtains the corresponding control signal of the Current fuel, so as to improve the accurate of control dual-fuel vehicle
Property.
Fig. 7 is a kind of control device block diagram of dual-fuel vehicle provided in an embodiment of the present invention, which applies in double combustions
In truck, which includes at least an ECU, as shown in fig. 7, the device includes：
Determining module 701 for passing through the ECU, determines the Current fuel of engine in the dual-fuel vehicle；
First acquisition module 702, for according to the Current fuel, from the correspondence of fuel mark and control signal,
The corresponding control signal of the Current fuel is obtained, which is included in emitted dose, the angle of ignition and the torque of the Current fuel
It is at least one；
Second acquisition module 703, for obtaining the self study coefficient of the control signal from the memory space of the ECU；
Control module 704, for the self study coefficient according to the control signal He the control signal, control the engine with
The self study coefficient of the control signal and the control signal works.
In a kind of possible design, which further includes the spray of the atomizer and control natural gas of control gasoline
Air valve, the atomizer and the snifting valve are connected with the ECU；
Wherein, the low side of the snifting valve is connected with the ECU, and the flash of the snifting valve is connected with H bridges；The device also wraps
It includes：
Closedown module, for when receiving the out code of control snifting valve, the snifting valve to be closed by the H bridges.
In a kind of possible design, which is additionally operable to according to the Current fuel, and it is current to obtain this
The corresponding calibration scale of fuel；The current rotating speed of the dual-fuel vehicle and current air inflow are obtained, searches and deserves from the calibration scale
Preceding fuel corresponding control signal under current rotating speed and current air inflow, the fuel mark of associated storage fuel in the calibration scale
With the fuel under multiple rotating speeds and multiple air inflows corresponding control signal.
In a kind of possible design, which further includes：
3rd acquisition module for passing through the ECU, obtains the current voltage signal of the lambda sensor of the dual-fuel vehicle；
The determining module 701 is additionally operable to according to the current voltage signal, from the self study of the voltage signal and control signal
In the correspondence of coefficient, the control signal of the dual-fuel vehicle corresponding current control signal under current voltage signal is determined
Self study coefficient；
Memory module, for storing the self study coefficient of the current control signal into the memory space of the ECU.
In a kind of possible design, which is additionally operable to, by the ECU, obtain the mark of the dual-fuel vehicle
The current flag signal of will position；According to the current marking signal, in the correspondence identified from marking signal and fuel, determining should
The corresponding fuel of fuel mark is determined as the Current fuel of the engine by the corresponding fuel mark of current flag signal.
In the embodiment of the present invention, terminal determines the Current fuel of engine in the dual-fuel vehicle by the ECU；According to
The Current fuel from the correspondence of fuel mark and control signal, obtains the corresponding control signal of the Current fuel, the control
Signal processed includes at least one in emitted dose, the angle of ignition and the torque of the Current fuel；It is obtained from the memory space of the ECU
The self study coefficient of the control signal；According to the self study coefficient of the control signal He the control signal, control the engine with
The self study coefficient of the control signal and the control signal works.Since terminal can identify Current fuel, and it is based on working as
The fuel mark of preceding fuel, obtains the corresponding control signal of the Current fuel, so as to improve the accurate of control dual-fuel vehicle
Property.
It should be noted that：The control device for the dual-fuel vehicle that above-described embodiment provides is in the control of dual-fuel vehicle
When, only with the division progress of above-mentioned each function module for example, in practical application, above-mentioned function can be divided as needed
With by different function module completions, i.e., the internal structure of device is divided into different function modules, to complete above description
All or part of function.In addition, the control of the control device and dual-fuel vehicle for the dual-fuel vehicle that above-described embodiment provides
Embodiment of the method processed belongs to same design, and specific implementation process refers to embodiment of the method, and which is not described herein again.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modifications, equivalent replacements and improvements are made should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of control method of dual-fuel vehicle, which is characterized in that the method is applied in dual-fuel vehicle, double combustions
Truck includes at least an electronic controller ECU, the described method includes：
By the ECU, the Current fuel of engine in the dual-fuel vehicle is determined；
According to the Current fuel, from the correspondence of fuel mark and control signal, it is corresponding to obtain the Current fuel
Control signal, the control signal include at least one in emitted dose, the angle of ignition and the torque of the Current fuel；
The self study coefficient of the control signal is obtained from the memory space of the ECU；
According to the self study coefficient of the control signal and the control signal, control the engine with the control signal and
The self study coefficient of the control signal works.
2. according to the method described in claim 1, it is characterized in that, the dual-fuel vehicle further includes the atomizer of control gasoline
With the snifting valve of control natural gas, the atomizer and the snifting valve are connected with the ECU；
Wherein, the low side of the snifting valve is connected with the ECU, and the flash of the snifting valve is connected with H bridges；The method
It further includes：
When receiving the out code of control snifting valve, the snifting valve is closed by the H bridges.
3. according to the method described in claim 1, it is characterized in that, described according to the Current fuel, identify and control from fuel
In the correspondence of signal processed, the corresponding control signal of the Current fuel is obtained, including：
According to the Current fuel, the corresponding calibration scale of the Current fuel is obtained；
The current rotating speed of the dual-fuel vehicle and current air inflow are obtained, the Current fuel is searched from the calibration scale and is existed
Corresponding control signal under current rotating speed and current air inflow, the fuel mark of associated storage fuel and described in the calibration scale
Fuel corresponding control signal under multiple rotating speeds and multiple air inflows.
It is 4. according to the method described in claim 1, it is characterized in that, described according to the control signal and the control signal
Self study coefficient controls the engine to carry out working it with the self study coefficient of the control signal and the control signal
Afterwards, the method further includes：
By the ECU, the current voltage signal of the lambda sensor of the dual-fuel vehicle is obtained；
According to the current voltage signal, from the correspondence of the voltage signal and the self study coefficient of control signal, really
The self study coefficient of control signal corresponding current control signal under current voltage signal of the fixed dual-fuel vehicle；
The self study coefficient of the current control signal is stored into the memory space of the ECU.
5. according to the method described in claim 1, it is characterized in that, described by the ECU, determine in the dual-fuel vehicle
The Current fuel of engine, including：
By the ECU, the current flag signal of the flag bit of the dual-fuel vehicle is obtained；
According to the current flag signal, in the correspondence identified from marking signal and fuel, the current flag letter is determined
The fuel is identified the Current fuel that corresponding fuel is determined as the engine by number corresponding fuel mark.
6. a kind of control device of dual-fuel vehicle, which is characterized in that described device device is applied in dual-fuel vehicle, described
Dual-fuel vehicle includes at least an electronic controller ECU, and described device includes：
Determining module for passing through the ECU, determines the Current fuel of engine in the dual-fuel vehicle；
First acquisition module, for according to the Current fuel, from the correspondence of fuel mark and control signal, obtaining institute
The corresponding control signal of Current fuel is stated, the control signal is included in emitted dose, the angle of ignition and the torque of the Current fuel
It is at least one；
Second acquisition module, for obtaining the self study coefficient of the control signal from the memory space of the ECU；
Control module, for the self study coefficient according to the control signal and the control signal, control the engine with
The self study coefficient of the control signal and the control signal works.
7. device according to claim 6, which is characterized in that the dual-fuel vehicle further includes the atomizer of control gasoline
With the snifting valve of control natural gas, the atomizer and the snifting valve are connected with the ECU；
Wherein, the low side of the snifting valve is connected with the ECU, and the flash of the snifting valve is connected with H bridges；Described device
It further includes：
Closedown module, for when receiving the out code of control snifting valve, the snifting valve to be closed by the H bridges.
8. device according to claim 6, which is characterized in that
First acquisition module is additionally operable to according to the Current fuel, obtains the corresponding calibration scale of the Current fuel；It obtains
The current rotating speed of the dual-fuel vehicle and current air inflow search the Current fuel in current rotating speed from the calibration scale
The corresponding control signal under current air inflow, the fuel mark of associated storage fuel and the fuel are more in the calibration scale
Corresponding control signal under a rotating speed and multiple air inflows.
9. device according to claim 6, which is characterized in that described device further includes：
3rd acquisition module for passing through the ECU, obtains the current voltage signal of the lambda sensor of the dual-fuel vehicle；
The determining module is additionally operable to according to the current voltage signal, from the self study of the voltage signal and control signal
In the correspondence of coefficient, the control signal of the dual-fuel vehicle corresponding current control letter under current voltage signal is determined
Number self study coefficient；
Memory module, for storing the self study coefficient of the current control signal into the memory space of the ECU.
10. device according to claim 6, which is characterized in that
The determining module is additionally operable to, by the ECU, obtain the current flag signal of the flag bit of the dual-fuel vehicle；
According to the current flag signal, in the correspondence identified from marking signal and fuel, the current flag signal pair is determined
The corresponding fuel of fuel mark is determined as the Current fuel of the engine by the fuel mark answered.
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| CN108087135B (en) | 2020-09-04 |
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