CN108894884B - Full-automatic control system for multi-fuel supply of automobile and control method thereof - Google Patents
Full-automatic control system for multi-fuel supply of automobile and control method thereof Download PDFInfo
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- CN108894884B CN108894884B CN201810692876.5A CN201810692876A CN108894884B CN 108894884 B CN108894884 B CN 108894884B CN 201810692876 A CN201810692876 A CN 201810692876A CN 108894884 B CN108894884 B CN 108894884B
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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
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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
- 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
- F02D19/08—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 simultaneously using pluralities of fuels
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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
- F02D41/20—Output circuits, e.g. for controlling currents in command coils
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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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
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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
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/402—Multiple injections
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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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/021—Engine temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention relates to a full-automatic control system for automobile multi-fuel supply, which relates to the technical field of automobile engine control, in particular to a full-automatic control system for automobile multi-fuel supply and a control method thereof.
Description
Technical Field
The invention relates to the technical field of automobile engine control, in particular to a full-automatic control system suitable for automobile multi-fuel supply and a control method thereof.
Background
At present, the development and application of gasoline substitute fuels, such as methanol, methanol gasoline, ethanol gasoline, artificial mixed fuel and the like, are one of the strategic measures taken by the state. However, most of the engines of the common automobiles are gasoline engines at present, which are not suitable for alternative fuels and cannot be directly used.
The invention patent '201110218929.8' discloses a method and a controller for controlling fuel of an automobile, which discloses a technology for effectively controlling the fuel injection quantity of an engine through a controller on the premise of not changing a computer of the automobile. However, in terms of actual production operation, it mainly detects the outdoor environment temperature, and it is possible to realize ideal control only when the engine temperature is at normal temperature, and after the engine is started and operated, it is impossible to detect the engine temperature in real time, and it is impossible to ensure accurate control, and in the control method, the delay control when the outdoor environment temperature is less than or equal to 10 degrees cannot accurately judge the engine temperature at that time, and it is impossible to accurately control in real time, and it wastes fuel, and the combustion is insufficient, and it is impossible to implement it in practical application.
Disclosure of Invention
The invention aims to provide a full-automatic control system for multi-fuel supply of an automobile and a control method thereof, so as to achieve the purposes of controlling methanol, methanol gasoline, ethanol and ethanol gasoline fuels for the automobile and adjusting the proportion parameter of a pulse signal output end of an engine oil nozzle relative to an oil injection pulse signal input end output by a computer of an automobile engine according to the working state of the engine.
The invention provides a full-automatic control system for supplying multiple fuels to an automobile, which comprises a signal input part, a signal output part, an intermediate processing unit, a CPU control unit and a driving circuit module, wherein the CPU control unit is connected with a storage unit, the signal input part comprises an engine rotating speed signal input end, an oil injection pulse signal input end output by an automobile engine computer, an engine temperature signal input end, a throttle valve signal input end, a mode switching switch, an automobile exhaust pipe oxygen sensor signal input end and an ignition switch power input end, the signal output part comprises an engine oil nozzle pulse signal output end, a PWM duty ratio voltage signal output end and an L ED display end, the signal input part is connected with the CPU control unit through the intermediate processing unit, the CPU control unit is connected with the signal output part through the driving circuit module, the mode switching switch realizes the working mode conversion through key information and comprises an equal ratio mode, an automatic mode and a fixed mode, the equal ratio mode is a working mode in which the engine uses gasoline as the fuel, the fixed mode and the automatic mode are a working mode in which the engine uses non-as the fuel, and the CPU control unit is provided with the equal ratio mode, the automatic mode and the fixed mode control program, and the full-automatic control system based on the full-automatic control method:
step 1: initializing;
the initialization setting of each sensor of the signal input part, the output state of the signal output part and the output pin of the CPU control unit.
Step 2: detecting key information;
detecting the working mode state selected by the mode selector switch, and if the working mode state is the geometric mode, continuing to step 3; if the mode is the fixed mode, continuing to step 4; if the mode is the automatic mode, continuing to step 5;
and step 3: in the equal ratio mode, the output end of the pulse signal of the fuel spray nozzle of the engine outputs a signal in a ratio of 1:1 relative to the input end of the fuel spray pulse signal output by a computer of the automobile engine, and step 6 is executed;
and 4, step 4: in a fixed mode, adjusting an output ratio parameter of an engine fuel spray nozzle pulse signal output end relative to a fuel spray pulse signal input end output by an automobile engine computer through key information setting, controlling fixed output of the engine fuel spray nozzle pulse signal output end semaphore according to the set output ratio, and executing the step 6;
and 5: in the automatic mode:
firstly, acquiring the temperature of the engine during operation through a temperature sensor, detecting the temperature of the engine, and executing and continuing the step 6 according to the following conditions:
(1) when the temperature is more than or equal to-30 ℃ and less than-1 ℃, controlling the output of the signal quantity of the pulse signal output end of the fuel spray nozzle of the engine according to the output ratio of 4.00;
(2) when the temperature is more than or equal to 1 and less than 15 ℃, controlling the output of the signal quantity of the pulse signal output end of the fuel spray nozzle of the engine according to the output ratio of 1.50;
(3) when the temperature is not less than 15 ℃ and less than 60 ℃, controlling the output of the signal quantity of the pulse signal output end of the fuel spray nozzle of the engine according to the output ratio of 1.40;
(4) when the temperature is more than or equal to 60 ℃, on the basis of the signal quantity of the signal input end of the oxygen sensor of the exhaust pipe of the comprehensive automobile, the output ratio of the pulse signal output end of the fuel spray nozzle of the engine is adjusted according to the rotating speed of the engine, and the method specifically comprises the following conditions:
(4-1) when the rotating speed is more than or equal to 800 and less than 1200, regulating and controlling the output ratio through the voltage of the throttle signal input end: when the voltage of the throttle valve signal input end is larger than or equal to 4.5v, the output of the signal quantity of the engine fuel spray nozzle pulse signal output end is controlled according to the output ratio of 1.4; when the voltage of the throttle signal input end is less than or equal to 2.5v and less than 4.5v, controlling the output of the signal quantity of the engine fuel spray nozzle pulse signal output end according to the output ratio of 1.3; when the voltage of the throttle signal input end is less than or equal to 1.0v and less than 2.5v, controlling the output of the signal quantity of the engine fuel spray nozzle pulse signal output end according to the output ratio of 1.20; the voltage of the throttle signal input end is less than or equal to 0.5v and less than or equal to 1.0v, and the output of the signal quantity of the engine fuel spray nozzle pulse signal output end is controlled according to the output ratio of 1.0;
(4-2) when the rotating speed is more than or equal to 1200 and less than 1800 rotating speed, controlling the output of the signal quantity of the pulse signal output end of the engine oil nozzle according to the output ratio of 1.30-1.40;
(4-3) controlling the output of the signal quantity of the pulse signal output end of the engine fuel spray nozzle according to the output ratio of 1.30-1.20 when the rotating speed is more than or equal to 1800 and less than 2400;
(4-4) when the rotating speed is not less than 2400 and not more than 4000, controlling the output of the signal quantity of the pulse signal output end of the engine fuel spray nozzle according to the output ratio of 1.20-1.10;
the output ratio is a proportional parameter of a pulse signal output end of an engine fuel spray nozzle relative to a fuel spray pulse signal input end output by an automobile engine computer;
step 6: the CPU control unit controls the output of 0.45v voltage at the PWM duty ratio voltage signal output end, provides 0.45v pulse voltage for the engine, enables the engine ECU to process the air-fuel ratio according to the numerical value, simulates a normal pulse signal required by the engine ECU, and executes the step 7;
and 7, displaying information of an external L ED display end and returning to the step 2, wherein the information comprises engine running information, temperature, rotating speed, working mode, signal quantity of a pulse signal output end of an engine oil nozzle and a corresponding output ratio, the signal quantity and the corresponding output ratio are all displayed outwards through a L ED display end, returning to the step 2, and repeating the control step.
The intermediate processing unit comprises a signal processing circuit and a power module, wherein the signal processing circuit comprises a first processing circuit, a second processing circuit, a third processing circuit, a fourth processing circuit and a fifth processing circuit, the first processing circuit is connected with a throttle valve signal input end, an engine temperature signal input end and an automobile exhaust pipe oxygen sensor signal input end, the second processing circuit is connected with an oil injection pulse signal input end output by an automobile engine computer, the third processing circuit is connected with an engine rotating speed signal input end, the fourth processing circuit is connected with a mode switching switch, the fifth processing circuit is connected with an ignition switch power supply input end and then is connected to a CPU control unit through the power module, and the CPU control unit is connected with an engine oil injection nozzle pulse signal output end, a PWM duty ratio voltage signal output end and an L ED display end through a driving circuit module.
Furthermore, the storage unit is used for storing the proportional mode information set by the key and the rotating speed and temperature parameters in the program execution process.
Further, the control program in the CPU control unit sets: under the equal ratio mode, the pulse signal output end of an engine fuel spray nozzle outputs signals in a ratio of 1:1 relative to the fuel spray pulse signal input end output by an automobile engine computer; in a fixed mode, adjusting an output ratio parameter of a pulse signal output end of an engine fuel spray nozzle through key information setting; in the automatic mode, after the signal quantities of the engine rotating speed signal input end, the engine temperature signal input end and the throttle valve signal input end are comprehensively analyzed, the output ratio of the engine fuel spray nozzle pulse signal output end is automatically adjusted.
Furthermore, the driving circuit module consists of a MOS field effect transistor, an L R2905 chip and a breakdown-preventing reverse diode.
Furthermore, the intermediate processing unit also comprises a power supply boosting module, the power supply boosting module generates PWM pulse through an IC chip UC3843 to control the inverter chip P80NF55-08 to boost voltage, the input end of the power supply boosting module is connected with the power supply of the ignition switch, and the output end of the power supply module is connected with the ignition coil.
The full-automatic control system and the control method for multi-fuel supply of the automobile, provided by the invention, can set different working modes, meet the use characteristics of methanol, methanol gasoline, ethanol and ethanol gasoline fuels, can normally use the gasoline when methanol, methanol gasoline, ethanol and ethanol gasoline fuels do not exist, and have strong adaptability. According to various working states of the engine, the control programs in different working modes are set in the CPU control unit of the invention, so that the supply proportion parameters of the automobile methanol, methanol gasoline, ethanol and ethanol gasoline fuel at the position of an engine oil nozzle can be automatically adjusted in different working modes, the control is accurate, safe and stable, and the positive effect that the power is more environment-friendly and closer to the gasoline can be achieved.
Drawings
The accompanying drawings disclose, in part, specific embodiments of the present invention, wherein,
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a control flow diagram of the present invention;
FIG. 3 is a circuit diagram of a first processing circuit of the present invention;
FIG. 4 is a circuit diagram of a second processing circuit of the present invention;
FIG. 5 is a circuit diagram of a third processing circuit of the present invention;
FIG. 6 is a circuit diagram of a fourth processing circuit of the present invention;
fig. 7 is a circuit diagram of a fifth processing circuit of the present invention.
Detailed Description
As shown in fig. 1-2, the automotive multi-fuel supply full-automatic control system provided by the invention comprises a signal input part, a signal output part, an intermediate processing unit, a CPU control unit and a driving circuit module, wherein the CPU control unit is connected with a storage unit, and adopts a chip special for an english-flying automobile and processes the chip in an interrupt mode; the storage unit is a storage chip with a model of 93C64 and is used for storing the proportional mode information set by the key and the rotating speed and temperature parameters in the program execution process.
The signal input part comprises an engine rotating speed signal input end, an oil injection pulse signal input end output by an automobile engine computer, an engine temperature signal input end, a throttle valve signal input end, a mode change-over switch, an automobile exhaust pipe oxygen sensor signal input end and an ignition switch power supply input end, the signal output part comprises an engine oil injection nozzle pulse signal output end, a PWM duty ratio voltage signal output end and an L ED display end, the signal input part is connected with a CPU control unit through an intermediate processing unit, the CPU control unit is connected with the signal output part through a driving circuit module, the mode change-over switch realizes the conversion of working modes through key information and comprises an equal ratio mode, an automatic mode and a fixed mode, the equal ratio mode is the working mode of the engine in a state that the engine uses gasoline as fuel, the fixed mode and the automatic mode are the working mode of the engine in a state that the engine uses non-gasoline as fuel, and control programs under different working modes.
The middle processing unit comprises a signal processing circuit and a power supply module, as shown in fig. 3-7, the signal processing circuit comprises a first processing circuit, a second processing circuit, a third processing circuit, a fourth processing circuit and a fifth processing circuit, wherein the first processing circuit is connected with a throttle valve signal input end, an engine temperature signal input end and an automobile exhaust pipe oxygen sensor signal input end, the second processing circuit is connected with an oil injection pulse signal input end output by an automobile engine computer, the third processing circuit is connected with an engine rotating speed signal input end, the fourth processing circuit is connected with a mode switching switch, the fifth processing circuit is connected with an ignition switch power supply input end and then is connected with a CPU control unit through the power supply module, and the CPU control unit is connected with an engine oil injection nozzle pulse signal output end, a PWM duty ratio voltage signal output end and an L ED display end through a driving circuit module.
Preferably, the driving circuit module consists of a MOS field effect transistor, an L R2905 chip and a breakdown-preventing reverse diode.
Preferably, the intermediate processing unit further comprises a power supply boosting module, the power supply boosting module generates a PWM pulse through an IC chip UC3843 to control the inverter chip P80NF55-08 to boost the voltage, an input end of the power supply boosting module is connected with a power supply of the ignition switch, and an output end of the power supply module is connected with the ignition coil.
Preferably, the control program in the CPU control unit sets: under the equal ratio mode, the pulse signal output end of an engine fuel spray nozzle outputs signals in a ratio of 1:1 relative to the fuel spray pulse signal input end output by an automobile engine computer; in a fixed mode, adjusting an output ratio parameter of a pulse signal output end of an engine fuel spray nozzle through key information setting; in the automatic mode, after the signal quantities of the engine rotating speed signal input end, the engine temperature signal input end and the throttle valve signal input end are comprehensively analyzed, the output ratio of the engine fuel spray nozzle pulse signal output end is automatically adjusted.
The invention provides a control method of a full-automatic control system for multi-fuel supply of an automobile, which comprises the following steps:
step 1: initializing;
the initialization setting of each sensor of the signal input part, the output state of the signal output part and the output pin of the CPU control unit.
Step 2: detecting key information;
detecting the working mode state selected by the mode selector switch, and if the working mode state is the geometric mode, continuing to step 3; if the mode is the fixed mode, continuing to step 4; if the mode is the automatic mode, continuing to step 5;
and step 3: in the equal ratio mode, the output end of the pulse signal of the fuel spray nozzle of the engine outputs a signal in a ratio of 1:1 relative to the input end of the fuel spray pulse signal output by a computer of the automobile engine, and step 6 is executed;
and 4, step 4: in a fixed mode, adjusting an output ratio parameter of an engine fuel spray nozzle pulse signal output end relative to a fuel spray pulse signal input end output by an automobile engine computer through key information setting, controlling fixed output of the engine fuel spray nozzle pulse signal output end semaphore according to the set output ratio, and executing the step 6;
and 5: in the automatic mode:
firstly, acquiring the temperature of the engine during operation through a temperature sensor, detecting the temperature of the engine, and executing and continuing the step 6 according to the following conditions:
(1) when the temperature is more than or equal to-30 ℃ and less than-1 ℃, controlling the output of the signal quantity of the pulse signal output end of the fuel spray nozzle of the engine according to the output ratio of 4.00;
(2) when the temperature is more than or equal to 1 and less than 15 ℃, controlling the output of the signal quantity of the pulse signal output end of the fuel spray nozzle of the engine according to the output ratio of 1.50;
(3) when the temperature is not less than 15 ℃ and less than 60 ℃, controlling the output of the signal quantity of the pulse signal output end of the fuel spray nozzle of the engine according to the output ratio of 1.40;
(4) when the temperature is more than or equal to 60 ℃, the output ratio of the pulse signal output end of the fuel spray nozzle of the engine is adjusted according to the rotating speed of the engine:
(4-1) when the rotating speed is more than or equal to 800 and less than 1200, regulating and controlling the output ratio through the voltage of the throttle signal input end: when the voltage of the throttle valve signal input end is larger than or equal to 4.5v, the output of the signal quantity of the engine fuel spray nozzle pulse signal output end is controlled according to the output ratio of 1.4; when the voltage of the throttle signal input end is less than or equal to 2.5v and less than 4.5v, controlling the output of the signal quantity of the engine fuel spray nozzle pulse signal output end according to the output ratio of 1.3; when the voltage of the throttle signal input end is less than or equal to 1.0v and less than 2.5v, controlling the output of the signal quantity of the engine fuel spray nozzle pulse signal output end according to the output ratio of 1.20; the voltage of the throttle signal input end is less than or equal to 0.5v and less than or equal to 1.0v, and the output of the signal quantity of the engine fuel spray nozzle pulse signal output end is controlled according to the output ratio of 1.0; in a specific application embodiment, for example, the voltage of the signal input end of the Jetta automobile throttle valve is changed from 4.5V to 0.6V, and the voltage of the signal input end of the Mitsubishi automobile throttle valve is changed from 0.6V to 4.5V, so that the invention can be applied to different automobile types and has strong applicability.
(4-2) when the rotating speed is more than or equal to 1200 and less than 1800 rotating speed, controlling the output of the signal quantity of the pulse signal output end of the engine oil nozzle according to the output ratio of 1.30-1.40;
(4-3) controlling the output of the signal quantity of the pulse signal output end of the engine fuel spray nozzle according to the output ratio of 1.30-1.20 when the rotating speed is more than or equal to 1800 and less than 2400;
(4-4) when the rotating speed is not less than 2400 and not more than 4000, controlling the output of the signal quantity of the pulse signal output end of the engine fuel spray nozzle according to the output ratio of 1.20-1.10;
the output ratio is a proportional parameter of a pulse signal output end of an engine fuel spray nozzle relative to a fuel spray pulse signal input end output by an automobile engine computer;
step 6: the CPU control unit controls the output of 0.45v voltage at the PWM duty ratio voltage signal output end, provides 0.45v pulse voltage for the engine, enables the engine ECU to process the air-fuel ratio according to the numerical value, simulates a normal pulse signal required by the engine ECU, and executes the step 7;
and 7, displaying information of an external L ED display end and returning to the step 2, wherein the information comprises engine running information, temperature, rotating speed, working mode, signal quantity of a pulse signal output end of an engine oil nozzle and a corresponding output ratio, the signal quantity and the corresponding output ratio are all displayed outwards through a L ED display end, returning to the step 2, and repeating the control step.
The invention is also applicable to the control of other alcohol-based fuels, and particularly can adjust the proportion parameter of the pulse signal output end of the engine fuel spray nozzle relative to the fuel spray pulse signal input end output by the automobile engine computer by adjusting the control program in the CPU control unit according to the actual situation.
Claims (6)
1. A full-automatic control system for supplying multiple fuels to an automobile comprises a signal input part, a signal output part, an intermediate processing unit, a CPU control unit and a drive circuit module, wherein the CPU control unit is connected with a storage unit, the signal input part comprises an engine rotating speed signal input end, an oil injection pulse signal input end output by an automobile engine computer, an engine temperature signal input end, a throttle valve signal input end, a mode switching switch, an automobile exhaust pipe oxygen sensor signal input end and an ignition switch power supply input end, the signal output part comprises an engine oil nozzle pulse signal output end, a PWM duty ratio voltage signal output end and an L ED display end, the signal input part is connected with the CPU control unit through the intermediate processing unit, the CPU control unit is connected with the signal output part through the drive circuit module, the mode switching switch realizes the conversion of working modes through key information and comprises an equal ratio mode, an automatic mode and a fixed mode, the equal ratio mode is the working mode of the engine under the condition that the engine uses gasoline as the fuel, the fixed mode and the automatic mode are the working mode of the engine under the condition that the engine uses non-gasoline as the fuel, and the control program of the equal ratio mode, the automatic mode and the fixed mode are arranged in the CPU control unit:
step 1: initializing;
the initialization setting of each sensor of the signal input part, the output state of the output pin of the signal output part and the CPU control unit;
step 2: detecting key information;
detecting the working mode state selected by the mode selector switch, and if the working mode state is the geometric mode, continuing to step 3; if the mode is the fixed mode, continuing to step 4; if the mode is the automatic mode, continuing to step 5;
and step 3: in the equal ratio mode, the output end of the pulse signal of the fuel spray nozzle of the engine outputs a signal in a ratio of 1:1 relative to the input end of the fuel spray pulse signal output by a computer of the automobile engine, and step 6 is executed;
and 4, step 4: in a fixed mode, adjusting an output ratio parameter of an engine fuel spray nozzle pulse signal output end relative to a fuel spray pulse signal input end output by an automobile engine computer through key information setting, controlling fixed output of the engine fuel spray nozzle pulse signal output end semaphore according to the set output ratio, and executing the step 6;
and 5: in the automatic mode:
firstly, acquiring the temperature of the engine during operation through a temperature sensor, detecting the temperature of the engine, and executing and continuing the step 6 according to the following conditions:
(1) when the temperature is more than or equal to-30 ℃ and less than-1 ℃, controlling the output of the signal quantity of the pulse signal output end of the fuel spray nozzle of the engine according to the output ratio of 4.00;
(2) when the temperature is more than or equal to 1 and less than 15 ℃, controlling the output of the signal quantity of the pulse signal output end of the fuel spray nozzle of the engine according to the output ratio of 1.50;
(3) when the temperature is not less than 15 ℃ and less than 60 ℃, controlling the output of the signal quantity of the pulse signal output end of the fuel spray nozzle of the engine according to the output ratio of 1.40;
(4) when the temperature is more than or equal to 60 ℃, on the basis of the signal quantity of the signal input end of the oxygen sensor of the exhaust pipe of the comprehensive automobile, the output ratio of the pulse signal output end of the fuel spray nozzle of the engine is adjusted according to the rotating speed of the engine, and the method specifically comprises the following conditions:
(4-1) when the rotating speed is more than or equal to 800 and less than 1200, regulating and controlling the output ratio through the voltage of the throttle signal input end: when the voltage of the throttle valve signal input end is larger than or equal to 4.5v, the output of the signal quantity of the engine fuel spray nozzle pulse signal output end is controlled according to the output ratio of 1.4; when the voltage of the throttle signal input end is less than or equal to 2.5v and less than 4.5v, controlling the output of the signal quantity of the engine fuel spray nozzle pulse signal output end according to the output ratio of 1.3; when the voltage of the throttle signal input end is less than or equal to 1.0v and less than 2.5v, controlling the output of the signal quantity of the engine fuel spray nozzle pulse signal output end according to the output ratio of 1.20; the voltage of the throttle signal input end is less than or equal to 0.5v and less than or equal to 1.0v, and the output of the signal quantity of the engine fuel spray nozzle pulse signal output end is controlled according to the output ratio of 1.0;
(4-2) when the rotating speed is more than or equal to 1200 and less than 1800 rotating speed, controlling the output of the signal quantity of the pulse signal output end of the engine oil nozzle according to the output ratio of 1.30-1.40;
(4-3) controlling the output of the signal quantity of the pulse signal output end of the engine fuel spray nozzle according to the output ratio of 1.30-1.20 when the rotating speed is more than or equal to 1800 and less than 2400;
(4-4) when the rotating speed is not less than 2400 and not more than 4000, controlling the output of the signal quantity of the pulse signal output end of the engine fuel spray nozzle according to the output ratio of 1.20-1.10;
the output ratio is a proportional parameter of a pulse signal output end of an engine fuel spray nozzle relative to a fuel spray pulse signal input end output by an automobile engine computer;
step 6: the CPU control unit controls the output of 0.45v voltage at the PWM duty ratio voltage signal output end, provides 0.45v pulse voltage for the engine, enables the engine ECU to process the air-fuel ratio according to the numerical value, simulates a normal pulse signal required by the engine ECU, and executes the step 7;
and 7, displaying information of an external L ED display end and returning to the step 2, wherein the information comprises engine running information, temperature, rotating speed, working mode, signal quantity of a pulse signal output end of an engine oil nozzle and a corresponding output ratio, the signal quantity and the corresponding output ratio are all displayed outwards through a L ED display end, returning to the step 2, and repeating the steps.
2. The automotive multi-fuel supply full-automatic control system according to claim 1, further characterized in that the intermediate processing unit comprises a signal processing circuit and a power module, the signal processing circuit comprises a first processing circuit, a second processing circuit, a third processing circuit, a fourth processing circuit and a fifth processing circuit, wherein the first processing circuit is connected with a throttle signal input end, an engine temperature signal input end and an automotive exhaust pipe oxygen sensor signal input end, the second processing circuit is connected with an oil injection pulse signal input end output by an automotive engine computer, the third processing circuit is connected with an engine rotating speed signal input end, the fourth processing circuit is connected with a mode switching switch, the fifth processing circuit is connected with an ignition switch power input end and then is connected with the CPU control unit through the power module, and the CPU control unit is connected with an engine oil injection nozzle pulse signal output end, a PWM duty ratio voltage signal output end and an L ED display end through the driving circuit module.
3. The automotive multi-fuel supply fully automatic control system according to claim 1, further characterized in that the storage unit is used for storing proportional mode information set by a key and a rotating speed temperature parameter during program execution.
4. The automotive multi-fuel supply fully-automatic control system according to claim 1, further characterized in that the control program in the CPU control unit sets: under the equal ratio mode, the pulse signal output end of an engine fuel spray nozzle outputs signals in a ratio of 1:1 relative to the fuel spray pulse signal input end output by an automobile engine computer; in a fixed mode, adjusting an output ratio parameter of a pulse signal output end of an engine fuel spray nozzle through key information setting; in the automatic mode, after the signal quantities of the engine rotating speed signal input end, the engine temperature signal input end and the throttle valve signal input end are comprehensively analyzed, the output ratio of the engine fuel spray nozzle pulse signal output end is automatically adjusted.
5. The automotive multi-fuel supply fully automatic control system according to claim 1, further characterized in that the driving circuit module is composed of a MOS field effect transistor, an L R2905 chip and a breakdown-preventing reverse diode.
6. The automotive multi-fuel supply full-automatic control system according to claim 1, further characterized in that the intermediate processing unit further comprises a power boost module, the power boost module generates PWM pulses through an IC chip UC3843 to control the inverter chip P80NF55-08 to boost the voltage, the input end of the power boost module is connected with the power supply of the ignition switch, and the output end of the power boost module is connected with the ignition coil.
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| US8108120B2 (en) * | 2004-10-25 | 2012-01-31 | Frederico Griese | Bi-fuel conversion device for an internal combustion engine |
| CN101353986A (en) * | 2007-07-23 | 2009-01-28 | 景叙达 | Methanol / gasoline double-fuel electronic commutator for automobile |
| US9422874B2 (en) * | 2012-12-05 | 2016-08-23 | Electromotive, Inc. | Simplified method to inject ethanol or other solution additives into diesel engines equipped with a digital data bus |
| CN103899424A (en) * | 2014-03-27 | 2014-07-02 | 哈尔滨工程大学 | Ship dual-fuel-engine speed control system and method |
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