CN101418731A - Method for controlling air input of engine by water temperature sensor signal - Google Patents
Method for controlling air input of engine by water temperature sensor signal Download PDFInfo
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- CN101418731A CN101418731A CNA2007101131876A CN200710113187A CN101418731A CN 101418731 A CN101418731 A CN 101418731A CN A2007101131876 A CNA2007101131876 A CN A2007101131876A CN 200710113187 A CN200710113187 A CN 200710113187A CN 101418731 A CN101418731 A CN 101418731A
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Abstract
Disclosed is a control method for engine air input by water temperature sensor signal, which belongs to the technical field of improving the gas mixture air-fuel ratio of motor vehicle engine. The method is characterized in that a controller collects the water temperature sensor signal data based on a target air-fuel ratio preset in the controller, oil injection pulse width signal data are utilized to perform feedback correction, and the air demand for engine gas mixture air-fuel ratio under different conditions is automatically adjusted and controlled by the ratio control and calculation, analysis and comparison of a microprocessor. the control to the engine air input is realized by the control to the rotating speed proportion to a fan, the gas mixture of the engine is performed with optimal control, the air intake charge coefficient is adjustable, the combustion of the engine cylinder is sufficient, and the combustion temperature is reduced, the power performance is improved, the emission of harmful gas is reduced, and the fuel consumption is reduced. The invention is adaptive to the fuel economy and achieves the purpose of reducing the emission of harmful gas and environmental protection and energy conservation.
Description
Technical field
Water temperature sensor signal of the present invention belongs to the technical field that improves the motor car engine gasoline air mixture ratio to control method for engine air input.
Background technique
Guaranteeing under the prerequisite of engine power performance at present, for reduce the engine oil consumption, improve its fuel oil Economy, reduce the exhaust gas discharging amount, the gas handling system of motor various technological improvements have been done, to increase air input of engine by air, making it fuel oil more fully burns, improve engine power performance etc., and obtained corresponding effects.Improvement to engine aspirating system in the prior art is: 1, to the elongated degree control of suction tude, improve volumetric efficiency to improve the air inlet resonance.2, change the shape of the original suction tude of motor, make it charge air flow and produce eddy flow, improve atomizing.3, on engine air inlet tube, install fan additional,, reduce the resistance of air intake structure such as empty filter, oil gas is mixed fully with fine setting suction pressure and air inflow.Though more than improve one's methods in engine aspirating system in various degree change the inlet condition of motor.Said apparatus is except the elongated degree control of suction tude, and other can not carry out real-time automatic adjusting control by the motor air demand, can not realize different operating mode motor optimal air-fuel ratios and the real purpose that improves fuel economy and reduce noxious gas emission.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiency that prior art exists; Provide a kind of according to target air-fuel ratio value default in the controller, automatically regulate suction pressure and air inflow according to the working order under the Under Different Work Condition of Engine, make proportions of ingredients more approach the water temperature sensor signal of optimum target air fuel ratio value control method for engine air input.
The technical solution adopted for the present invention to solve the technical problems is: this water temperature sensor signal is to control method for engine air input, it is characterized in that: according to target air-fuel ratio value default in the controller, gather the water temperature sensor signal data, utilize the fuel injection pulsewidth signal data to carry out feedback modifiers, carry out correction-compensation with reference to relevant sensor signals, proportional control and computational analysis by microprocessor are compared, and the air demand of different operating mode engine mixed gas air fuel ratios is regulated control automatically.
The air demand of different operating mode engine mixed gas air fuel ratios is regulated control automatically make the air inflow proportional control.
The air inflow proportional control is to realize by the rotating speed proportional control to blower fan.
Target air-fuel ratio value default in the controller is by engine rig test, the survey data is optimized the arteries and veins spectrum data of handling and being stored in the controller.
Controller utilizes the fuel injection pulsewidth signal data that air input of engine by air is carried out feedback modifiers control.
Controller comprises microprocessor, water temperature sensor signal, fuel injection pulsewidth signal, oxygen sensor signal, signal conditioning circuit, Drive and Control Circuit and final controlling element, water temperature sensor signal, fuel injection pulsewidth signal and oxygen sensor signal link to each other with microprocessor by signal conditioning circuit, and microprocessor links to each other with final controlling element by Drive and Control Circuit.
Controller has carried out soft measurement processing by fuzzy to accurate processing method to the signal of lambda sensor.
Controller is taked predictive control in advance to the Time Delay of each sensor signal and final controlling element.
Blower fan and suction tude assembly that final controlling element is made up of speed-adjustable motor, flabellum.
Working principle
In the engine operation process, ECU mainly calculates the correction fuel injection quantity according to status parameters such as motor related sensor and relevant operating modes, to improve control accuracy.But motor is subjected under the self-condition interference factors and influences in the required air inflow under the different operating modes, therefore the present invention adopts independent control, with the Engine ECU concurrent working, to regulate the air demand of revising different operating mode motors, make mixed gas more approach optimum target air fuel ratio value.
Cooling-water temperature sensor monitoring engine cooling water temperature, cooling water temperature mainly is two aspects, first to the influence of motor: when the cooling water temperature value was spent less than 60, motor was in starting and warming-up operating mode, belonged to open loop situations control; This moment is because temperature is low, it is poor that motor sucks the atomizing effect of mixed gas, reasons such as engine speed is low, wave properties is big, for guaranteeing idle stability and power character and reasonably the burn atomization condition of motor under low-temperature condition, engine control system adopts oil spout enriching strategy, carries out oil spout control by arteries and veins spectrum MAP parameter given in advance in the ECU; Controller does not participate in the air inflow proportional control.Second: when the cooling water temperature value was spent greater than 60, this moment, motor was in running under the idling operation, and this operating mode belongs to the closed loop State Control; This moment, controller participated in the rotation speed of fan proportional control, and air inflow is compensated and corrected.According to target air-fuel ratio value default in the controller, with the engine water temperature sensor signal is primary condition, with reference to relevant speed probe, throttle position sensor, intake air temperature sensor, air inlet pressure sensor, lambda sensor, signals such as fuel injection pulsewidth signal, judge the operating conditions of motor, motor requirement to air fuel ratio under different operating modes is different, for guaranteeing that motor is in best power performance under different operating modes, controller is gathered the water temperature sensor signal data, utilize the fuel injection pulsewidth signal data to carry out feedback modifiers, after relatively judging by embedded proportional control of microprocessor and analysis of Calculating Method, calculate the required regulated quantity of air inflow, calculate the desired value of control target based on required regulated quantity, drive blower fan at certain rotary speed working based on this desired value, improve suction pressure and air inflow; For improving the responsiveness controller oxygen sensor signal has been carried out soft measurement processing by fuzzy to accurate processing method in the control procedure simultaneously, promptly utilize the oxygen sensor voltage signal that to survey to extrapolate immesurable air fuel ratio membership grade sets, extrapolate control coefrficient by the intermediate value averaging method at each in by the grade of degree of membership classification, form in the time of control and divide degree of membership control arteries and veins spectrum, as long as determine the residing grade of the condition of tabling look-up, just can adjust in real time by controlled coefficient; Controller utilizes oxygen sensor signal voltage change ratio decision state trend that final controlling element is shifted to an earlier date predictive control in order to solve the Time Delay of each sensor signal and final controlling element.Thereby the mixed gas that makes motor more approaches optimum target air fuel ratio value, and its fuel oil is fully burnt, and improves the power and the moment of torsion of motor, has also reduced noxious gas emission simultaneously.
Compared with prior art, the beneficial effect that the present invention had is: the controller that links to each other with suction tude assembly inner blower is set, air demand to different operating mode engine mixed gas air fuel ratios is regulated control automatically, utilize the variable-speed principle of blower fan, according to target air-fuel ratio value default in the controller, with the engine water temperature sensor signal is primary condition, utilize the fuel injection pulsewidth signal data to carry out feedback modifiers, carry out correction-compensation with reference to relevant sensor signals, after relatively judging by embedded proportional control of microprocessor and analysis of Calculating Method, calculate the required regulated quantity of air inflow, calculate the desired value of control target based on required regulated quantity, drive blower fan by certain rotary speed working based on this desired value, improve suction pressure and air inflow; For improving the responsiveness controller oxygen sensor signal has been carried out the real-time adjustment that soft measurement is handled by fuzzy to accurate processing method in the control procedure simultaneously; In order to solve the Time Delay of each sensor signal and final controlling element, utilize oxygen sensor signal voltage change ratio decision state trend that final controlling element is shifted to an earlier date predictive control; Thereby the mixed gas that makes motor more approaches optimum target air fuel ratio value, and its fuel oil is fully burnt, and improves the power and the moment of torsion of motor, has also reduced noxious gas emission simultaneously.Thereby it is controlled that the mixed gas of motor is carried out optimum, make that the air inlet volumetric efficiency is adjustable, make the engine cylinder internal combustion more abundant, reduced combustion temperature, improved power character, reduced discharge of harmful gases, oil consumption reduces, realized fuel economy and reduce the purpose of noxious gas emission, environmental protection and energy saving.
Description of drawings
Fig. 1: engine air inlet tube assembly structure schematic representation;
Fig. 2: controller circuitry theory diagram;
Fig. 3: controller circuitry schematic diagram.
Fig. 1-the 3rd, most preferred embodiment of the present invention.Wherein: 1 gas-entered passageway mouth, 2 air-strainer, 3 controllers, 4 air flow chamber, 5 blower fans, 6 fan supporters, 7 speed-adjustable motors, 8 flabellums, 9 air communication road junctions, 10 housings;
Among Fig. 3: U1 microprocessor, U2 storage, U3 phase inverter, U4 gate circuit, U5 phaselocked loop, U6, U8 operational amplifier, U7 logarithmic amplifier, U9 transport and placing device, Q1-Q2 voltage stabilizing triode MG speed-adjustable motor 0P1-0P2 photo coupler R1-R20 resistance VR1, VR2 adjustable resistance C1-C8 electric capacity D1, D2 reference diode.
Embodiment
Below in conjunction with accompanying drawing 1-3 automatic adjusting control method for engine air input of the present invention is described further:
As shown in Figure 1: the suction tude assembly is made up of gas-entered passageway mouth 1, air-strainer 2, controller 3, air flow chamber 4, blower fan 5, air communication road junction 9 and housing 10; Wherein, blower fan 5 is made up of fan supporter 6, speed-adjustable motor 7, flabellum 8; Ambient atmos enters air-strainer 2 through gas-entered passageway mouth 1, carries out purification filtering after air flow chamber 4 enters motor by air communication road junction 9 through 2 pairs of institutes of air-strainer air inlet body; Controller 3 is connected with the speed-adjustable motor 7 of blower fan 4.
As shown in Figure 2: microprocessor is gathered engine water temperature sensor signal, fuel injection pulsewidth signal and oxygen sensor signal data by signal conditioning circuit, after relatively judging by embedded proportional control of microprocessor and analysis of Calculating Method, by the drive control circuit final controlling element, thereby blower fan is carried out the rotating speed proportional control, so the air inflow proportional control is in the controllable state of system.
As shown in Figure 3: form controller by microprocessor U1 and peripheral circuit thereof, microprocessor is a single-chip microcomputer, embedded proportional control and computational methods; According to Under Different Work Condition of Engine, according to target air-fuel ratio value default in the controller, gather the water temperature sensor signal data, carry out feedback modifiers with the fuel injection pulsewidth signal data, by microprocessor proportional control and Calculation Method, participate in the control Parameters Calculation, the export target value is carried out the air inlet proportional control by the rotating speed proportional control to blower fan 5.
Form controller by microprocessor U1 and peripheral circuit thereof, microprocessor U1 adopts a kind of 8 microprocessor microcontrollers of the 78k0 of NEC Corporation series; According to Under Different Work Condition of Engine,, by embedded proportional control of microprocessor and computational methods, participate in the control Parameters Calculation, the export target value is carried out the air inlet proportional control by the rotating speed proportional control to blower fan 5.
The X1 of microprocessor U1, X2 pin link to each other with transistor Y1, and respectively by capacitor C 1, C2 ground connection; The P62 pin of microprocessor U1 is connected with 1 pin of voltage stabilizing triode Q1 by resistance R 3, the 3 pin ground connection of voltage stabilizing triode Q1, and 2 pin are connected with 1 pin of voltage stabilizing triode Q2; The 3 pin ground connection of voltage stabilizing triode Q2, and meet high level VCC by reference diode D1, D2,2 pin link to each other with the negative pole of motor M G, and the positive pole of MG meets high level VCC.
Form data storage cell by storage U2 and peripheral circuit thereof, data are stored.
1,2,3,4, the 7 pin ground connection of storage U2,8 pin meet high level VCC; 5,6 pin of storage U2 link to each other with P40, the P41 of microprocessor U1, and meet high level VCC by resistance R 1, R2 respectively.
Form fuel injection signal pulse width discriminating circuit by phase inverter U3 and gate circuit U4 and peripheral circuit thereof, be input to the INTP3 pin of microprocessor U1, participate in the control Parameters Calculation.
1 pin of phase inverter U3 connects the VCC high level by resistance R 5, connects fuel injection signal by capacitor C 4, and capacitor C 3 and resistance R 5 series connections are between an end and ground of capacitor C 4; 2 pin of phase inverter U3 connect 1 pin of gate circuit U4.2 pin of gate circuit U4 are by resistance R 4 ground connection, and 3 pin connect the 1st pin of photo coupler 0P1; 2, the 4 pin ground connection of photo coupler 0P1, the 3rd pin of photo coupler 0P1 connects the INTP3 pin of microprocessor U1 successively.
Form power sense circuit by phaselocked loop U5 and peripheral circuit thereof, be input to the P12 pin of microprocessor U1, participate in the control Parameters Calculation.
4 pin of phaselocked loop U5 connect the 4th pin of photo coupler 0P2; Be connected with capacitor C 5 between 6 pin of phaselocked loop U5 and 7 pin; 9 pin of phaselocked loop U5 connect battery voltage by resistance R 6, and 9 pin are also by resistance R 7 ground connection; 11 pin of phaselocked loop U5 are by resistance R 8 ground connection.1, the 3 pin ground connection of photo coupler 0P2, the 2nd pin of photo coupler 0P2 connects the P12 pin of microprocessor U1.
Form the oxygen sensor signal acquisition and conditioning circuit by operational amplifier U6, logarithmic amplifier U7, operational amplifier U8 and peripheral circuit thereof, oxygen sensor signal is imported logarithmic amplifier U7 after operational amplifier U6 carries out 10 times of amplifications to current signal, after the 10 pin output of logarithmic amplifier U7, carry out I-V through operational amplifier U8 and be transformed to the P27 pin that the 5-0V voltage signal is input to microprocessor U1, participate in the control Parameters Calculation.
2 pin of operational amplifier U6 connect oxygen sensor signal, link to each other with 6 pin by resistance R 9; 3 pin of operational amplifier U6 link to each other with 2 pin of logarithmic amplifier U7, link to each other with 6 pin of operational amplifier U6 by resistance R 10, and connect the VCC high level by resistance R 11.2 pin of logarithmic amplifier U7 link to each other with 7 pin of logarithmic amplifier U7 by capacitor C 7; 6 pin of logarithmic amplifier U7 are by resistance R 12, capacitor C 6 ground connection; 15 pin of logarithmic amplifier U7 are by resistance R 13, adjustable resistance VR2 ground connection; 16 pin of logarithmic amplifier U7 connect the VCC high level by resistance R 14, adjustable resistance VR1; 11 pin of logarithmic amplifier U7 connect the VCC high level.10 pin of logarithmic amplifier U7 link to each other with 2 pin of operational amplifier U8 by resistance R 15, and by resistance R 16 ground connection; 2 pin of operational amplifier U8 link to each other with 6 pin by resistance R 17; 6 pin of operational amplifier U8 connect the P27 pin of microprocessor U1; The 3 pin ground connection of operational amplifier U8.
Form the temperature sensor signal acquisition and conditioning circuit by comparator U9 and peripheral circuit thereof, water temperature signal is converted to analog voltage signal by the serial connection divider resistance to be declared for comparator U9 ratio, comparator U9 exports the P23 pin that digital signal is input to microprocessor U1 successively, judges by microprocessor U1 to start and the warming-up operating mode.
2 pin of comparator U9 connect water temperature signal successively, and 2 pin also connect the VCC high level by resistance R 18; 1 pin of comparator U9 connects the P23 of microprocessor U1 successively; 3 pin of comparator U9 connect the VCC high level by resistance R 20 ground connection by resistance R 19; 8 pin connect the VCC high level and pass through capacitor C 8 ground connection.
Working procedure:
During engine running, according to target air-fuel ratio value default in the controller, controller is gathered the engine water temperature sensor signal data, carry out feedback modifiers with the fuel injection pulsewidth signal data, after relatively judging by embedded proportional control of microprocessor and analysis of Calculating Method, calculate the required regulated quantity of air inflow, calculate the desired value of control target based on required regulated quantity, drive blower fan by certain rotary speed working based on this desired value, improve suction pressure and air inflow; For improving the responsiveness controller oxygen sensor signal has been carried out the real-time adjustment that soft measurement is handled by fuzzy to accurate processing method in the control procedure simultaneously; In order to solve the Time Delay of each sensor signal and final controlling element, utilize oxygen sensor signal voltage change ratio decision state trend that final controlling element is shifted to an earlier date predictive control; Thereby the mixed gas that makes motor more approaches optimum target air fuel ratio value, and its fuel oil is fully burnt, and improves the power and the moment of torsion of motor, has also reduced noxious gas emission simultaneously.
Claims (9)
1, water temperature sensor signal is to control method for engine air input, it is characterized in that: according to target air-fuel ratio value default in the controller, gather the water temperature sensor signal data, utilize the fuel injection pulsewidth signal data to carry out feedback modifiers, carry out correction-compensation with reference to relevant sensor signals, proportional control and computational analysis by microprocessor are compared, and the air demand of different operating mode engine mixed gas air fuel ratios is regulated control automatically.
2, water temperature sensor signal according to claim 1 is characterized in that control method for engine air input: the air demand of different operating mode engine mixed gas air fuel ratios is regulated control automatically adopt the air inflow proportional control.
3, water temperature sensor signal according to claim 2 is characterized in that control method for engine air input: the air inflow proportional control is to realize by the rotating speed proportional control to blower fan.
4, water temperature sensor signal according to claim 1 is to control method for engine air input, it is characterized in that: target air-fuel ratio value default in the controller is by engine rig test, the survey data is optimized the arteries and veins spectrum data of handling and being stored in the controller.
5, water temperature sensor signal according to claim 1 is characterized in that control method for engine air input: controller utilizes the fuel injection pulsewidth signal data that air input of engine by air is carried out feedback modifiers control.
6, water temperature sensor signal according to claim 1 is to control method for engine air input, it is characterized in that: controller comprises microprocessor, water temperature sensor signal, fuel injection pulsewidth signal, oxygen sensor signal, signal conditioning circuit, Drive and Control Circuit and final controlling element, water temperature sensor signal, fuel injection pulsewidth signal and oxygen sensor signal link to each other with microprocessor by signal conditioning circuit, and microprocessor links to each other with final controlling element by Drive and Control Circuit.
7, water temperature sensor signal according to claim 6 is characterized in that control method for engine air input: controller has carried out soft measurement processing by fuzzy to accurate processing method to the signal of lambda sensor.
8, according to claim 1,6 described water temperature sensor signals to control method for engine air input, it is characterized in that: controller is taked predictive control in advance to the Time Delay of each sensor signal and final controlling element.
9, water temperature sensor signal according to claim 6 is characterized in that control method for engine air input: blower fan (5) and suction tude assembly that final controlling element is made up of speed-adjustable motor (7), flabellum (8).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101131876A CN101418731B (en) | 2007-10-22 | 2007-10-22 | Method for controlling air input of engine by water temperature sensor signal |
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| CN2007101131876A CN101418731B (en) | 2007-10-22 | 2007-10-22 | Method for controlling air input of engine by water temperature sensor signal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112664339A (en) * | 2019-10-16 | 2021-04-16 | 日本特殊陶业株式会社 | Air-fuel ratio control system and air-fuel ratio control method |
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| CN1670351A (en) * | 2004-03-17 | 2005-09-21 | 吴雄良 | Ultralow discharging electric control device of electric jetting motor and its controlling method |
| CN1963172A (en) * | 2005-11-11 | 2007-05-16 | 珠海市绿能达科技有限公司 | Multipoint sequential injection electrically controlled device for liquefied natural gas bus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664339A (en) * | 2019-10-16 | 2021-04-16 | 日本特殊陶业株式会社 | Air-fuel ratio control system and air-fuel ratio control method |
| CN112664339B (en) * | 2019-10-16 | 2023-07-11 | 日本特殊陶业株式会社 | Air-fuel ratio control system and air-fuel ratio control method |
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