CN115263579A - Engine throttle control signal generation device and method - Google Patents
Engine throttle control signal generation device and method Download PDFInfo
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- CN115263579A CN115263579A CN202210915849.6A CN202210915849A CN115263579A CN 115263579 A CN115263579 A CN 115263579A CN 202210915849 A CN202210915849 A CN 202210915849A CN 115263579 A CN115263579 A CN 115263579A
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- engine
- throttle
- control signal
- throttle control
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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
- F02D41/0002—Controlling intake air
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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
- F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
- F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
- F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
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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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/0205—Circuit arrangements for generating control signals using an auxiliary engine speed control
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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
- F02D41/0002—Controlling intake air
- F02D2041/0022—Controlling intake air for diesel engines by throttle control
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention belongs to the technical field of fuel consumption of engine control machines, and discloses a device and a method for generating a control signal of an engine throttle valve, aiming at the problem of controlling the rotating speed of a main shaft of an engine when the rotating speed of the engine of an automobile is adopted to improve the fuel efficiency of the engine according to the minimum principle of fuel consumption rate.
Description
Technical Field
The invention belongs to the technical field of fuel consumption of engine control machines, and particularly relates to a device and a method for generating a control signal of an engine throttle valve.
Background
At present, the exhaustion of petroleum and environmental pollution become the most urgent problems facing the automobile industry in the world and even the whole human, and how to improve the fuel efficiency of an engine, including the transformation of the fuel automobile on the market, is more and more valued by governments of various countries.
The Chinese invention patent number is CN201911034826.9, the application date is 2019-10-29, and a control method for improving the fuel efficiency of an engine is disclosed, namely, an actual throttle opening control signal is a weighted result of a throttle opening control signal determined by an electronic throttle and a throttle opening control signal determined by the engine rotating speed according to the minimum principle of fuel consumption rate, the greater the weight is, the closer the actual throttle opening is to the throttle opening control signal determined by the electronic throttle, and the weighted weight is determined according to the acceleration of an accelerator pedal, so that the fuel consumption rate of the engine is better than the throttle opening determined by the electronic throttle alone; however, the method has the defects that the accurate acceleration value of the accelerator pedal of the engine needs to be acquired in real time, and the method is complex and has poor stability.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the engine throttle control signal generation device and the engine throttle control signal generation method, which can determine the weight used in the process of acquiring the actual throttle control signal without the signal of an accelerator pedal.
In order to achieve the purpose, the technical scheme is as follows: an engine throttle control signal generating device comprises a microprocessor, the device has two input signals and an output signal, the two input signals are engine speed signals respectivelynAnd throttle control signals generated by an engine controllerQCThe output signal is the actual throttle control signalQASaid actual throttle control signalQAFeeding to a throttle control motor, said throttle control signalQCAnd the data are not sent to a throttle control motor, and the microprocessor stores the data of the minimum curve of the fuel consumption rate of the engine in an off-line mode.
An engine throttle control signal generating method comprising the steps of:
step 2, detecting the engine speed signal on linenAnd electronic throttle pedal signalhSaid engine speed signalnThrottle control signal obtained by fuel consumption minimum curveQNThe electronic accelerator pedal signal h is output by the engine controller to obtain a throttle control signalQCSaid throttle control signalQCAnd throttle control signalQNWeighted sum to obtain actual throttle control signal of engineQA；
The actual throttle control signalQAThe calculation formula of (a) is as follows:
QA＝（1-α）QN＋αQC（1）
wherein alpha is a weighted weight (alpha is more than 0 and less than 1);
step 3, the method for obtaining the weighted weight α is as follows:
a, determining throttle control signal off-lineQCAnd throttle control signalQNThe maximum absolute value of the difference L0;
b, on-line detection and calculation of throttle control signalQCAnd throttle control signalQNThe absolute instantaneous value of the difference L;
c, obtaining a weighted weight alpha according to the ratio of L to L0.
The electronic throttle pedal signalhWhen there is a signal, the actual throttle control signalQAA control motor fed to the throttle; the electronic throttle pedal signalhAnd when no signal exists, the engine idles to inject oil.
In step 1, the method for obtaining the minimum curve of the fuel consumption rate of the engine is as follows:
a. the rotating speed of the main shaft of the engine is stabilized at a determined value through an electronic accelerator pedalNDisturbing the load of the output end of the engine, changing the opening of the throttle valve from small to large in an allowable range, and searching the opening of the throttle valve when the fuel consumption rate of the engine is minimumQ1 is prepared fromQ1，N1) Determining a point on a relationship curve between the engine speed and the throttle opening degree when the fuel consumption rate is minimum;
b. by sequentially varying the speed of rotation of the engine main shaftN1，N2，......，Nm, sequentially searching the opening degree of a throttle valve when the fuel consumption rate is minimumQ1，Q2，......，Qm for m points (Q1，N1），（Q2，N2），......，（Qm，Nm)) curve fitting to obtain a curve with the minimum fuel consumption rate of the engine;
c. the opening degree of the throttle valveQ1，Q2，......，Qm is the throttle control signal generated by the engine controller when the fuel consumption rate is minimum at the corresponding rotating speedQC。
The engine controller is internally provided with a method for realizing weighted sum, the result of the weighted sum is sent to an execution motor of the throttle valve through a corresponding output port A of the engine controller, and an electronic throttle pedal signalhAnd when no signal exists, the engine idles to inject oil.
Compared with the prior art, the invention has the advantages and beneficial effects that: the signal of an accelerator pedal is not needed in the process of weighting and acquiring the actual throttle control signal, the closer the weighted throttle opening control signal is to the throttle control signal determined by the electronic throttle output signal, the better the controlled sensitivity of the engine is, and the worse the fuel efficiency is; the closer the weighted throttle control signal is to the throttle control signal determined by the engine rotating speed according to the minimum fuel consumption rate curve, the poorer the controlled sensitivity of the engine is, the better the fuel efficiency is, and when the accelerator pedal is not moved, the weight is increased along with the reduction of the rotating speed of the engine, which is beneficial to automatic speed stabilization, and the weight is reduced along with the increase of the rotating speed of the engine, which is beneficial to energy conservation and emission reduction of the engine.
Drawings
The invention will be further described in detail with reference to the drawings and the detailed description, in which:
FIG. 1 is a functional block diagram of the weighting module when implemented outside of an engine controller;
FIG. 2 is a functional block diagram of the weighting module implemented within an engine controller.
Detailed Description
Example 1
An engine throttle control signal generating device comprising a microprocessor, said device having two input signals and an output signal, said two input signals being respectively an engine speed signalnAnd throttle control signals generated by an engine controllerQCThe output signal is the actual throttle control signalQAThe actual throttle control signalQAFeeding to a throttle control motor, said throttle control signalQCNo longer sent to the gas savingAnd the microprocessor stores the data of the minimum curve of the fuel consumption rate of the engine in an off-line mode.
As shown in FIG. 1, the method for implementing a weighted sum external to an engine controller includes implementing a weighting device having two input signals and one output signal and a throttle control motor.
A method of generating an engine throttle control signal comprising the steps of:
step 2, detecting the engine speed signal on linenAnd electronic throttle pedal signalhSaid engine speed signalnThrottle control signal obtained by fuel consumption rate minimum curveQNThe electronic throttle pedal signalhObtaining throttle control signal via engine controller outputQCSaid throttle control signalQCAnd throttle control signalQNWeighted sum to obtain actual throttle control signal of engineQA；
The actual throttle control signalQAThe calculation formula of (c) is as follows:
QA＝（1-α）QN＋αQC（1）
wherein alpha is a weighted weight (alpha is more than 0 and less than 1);
step 3, the method for obtaining the weighted weight α is as follows:
a, determining throttle control signal off-lineQCAnd throttle control signalQNThe maximum absolute value of the difference L0;
b, on-line detection and calculation of throttle control signalQCAnd throttle control signalQNThe absolute instantaneous value of the difference L;
c, obtaining a weighted weight alpha according to the ratio of L to L0.
The electronic throttle pedal signalhWhen there is a signal, the actual throttle control signalQAA control motor fed to the throttle; the electronic throttle pedal signalhAnd when no signal exists, the engine idles to inject oil.
In step 1, the method for obtaining the minimum curve of the fuel consumption rate of the engine is as follows:
a. the rotating speed of the main shaft of the engine is stabilized at a determined value through an electronic accelerator pedalNDisturbing the load of the output end of the engine, changing the opening of the throttle valve from small to large in an allowable range, and searching the opening of the throttle valve when the fuel consumption rate of the engine is minimumQ1, is prepared fromQ1，N1) Determining a point on a relationship curve between the engine speed and the throttle opening degree when the fuel consumption rate is minimum;
b. by sequentially varying the speed of rotation of the engine main shaftN1，N2，......，Nm, sequentially searching the opening degree of a throttle valve when the fuel consumption rate is minimumQ1，Q2，......，Qm for m points (, (Q1，N1），（Q2，N2），......，（Qm，Nm)) curve fitting to obtain a curve with the minimum fuel consumption rate of the engine;
c. the opening degree of the throttle valveQ1，Q2，......，Qm is the throttle control signal generated by the engine controller when the fuel consumption rate is minimum at the corresponding rotating speedQC。
As shown in FIG. 2, the method for realizing weighted sum in the engine controller, the result of weighted sum is sent to the execution motor of the throttle valve through the corresponding output port A of the engine controller, and the signal of the electronic throttle pedal is senthAnd when no signal exists, the engine idles to inject oil.
When the weight value in the actual throttle opening process is determined according to the weighted result of the throttle opening determined by the output signal of the electronic throttle pedal and the engine rotating speed according to the minimum curve of the fuel consumption rate, the signal of the throttle pedal does not need to be sampled in real time, and when the throttle pedal is not moved, the weight value is increased along with the reduction of the rotating speed of the engine, so that the automatic speed stabilization is facilitated, the weight value is reduced along with the increase of the rotating speed of the engine, the energy conservation and emission reduction of the engine are facilitated, the control process is simpler, and the reliability is better.
The method for off-line testing the relation curve between the engine speed and the throttle opening when the fuel consumption rate of the engine is minimum comprises the following steps: the method comprises the steps of stabilizing the rotation speed of a main shaft of an engine at a determined value N1 by controlling an electronic accelerator pedal, disturbing the load of an output end of the engine, enabling the opening of a throttle valve to change from small to large within an allowable range, searching the opening Q1 of the throttle valve when the fuel consumption rate of the engine is minimum, determining a point on a relation curve between the rotation speed of the engine and the opening of the throttle valve when the fuel consumption rate is minimum according to (Q1, N1), sequentially changing the rotation speed of the main shaft of the engine and stabilizing the rotation speed of the main shaft of the engine at N2, N3, nm, sequentially searching the openings Q2, Q3, nm of the throttle valve when the fuel consumption rate is minimum, and carrying out curve fitting on the m points ((Q1, N1), (Q2, N2), (Q2, nm)) to obtain the opening Q1, Q2, qm, and Qm are throttle valve opening control signals generated by a traditional engine controller when the fuel consumption rate is minimum at a corresponding rotation speed.
According to the load characteristic of the engine, under the fixed rotating speed, the fuel consumption rates under different throttle opening degrees have a minimum value, namely the optimal throttle opening degree, the fuel consumption rates are monotonically increased along with the increase of the throttle opening degree on the side that the throttle opening degree is larger than the optimal throttle opening degree, and the fuel consumption rates are monotonically decreased along with the increase of the throttle opening degree on the side that the throttle opening degree is smaller than the optimal throttle opening degree; on-line detecting engine speed signal and electronic throttle output signal, the throttle control signal determined by engine speed according to the minimum curve of fuel consumption rate isQNThe throttle control signal determined by the electronic throttle output signal isQCActual throttle control signalQAThen isQN、QCThe weighted sum of (a):
QA＝（1-α）QN＋αQC（1）
wherein alpha is a weighted weight (alpha is more than 0 and less than 1).
In the formula (1), the closer the weighted throttle opening control signal is to the throttle opening control signal determined by the electronic throttle output signal, the better the controlled sensitivity of the engine is, and the worse the fuel efficiency is; the closer the weighted throttle opening control signal is to the throttle opening control signal determined by the engine rotating speed according to the minimum fuel consumption curve, the worse the controlled sensitivity of the engine is, the better the fuel efficiency is, and the weighted weight determination method comprises the following steps: 1. determining the maximum value Lo of the absolute value of the difference between a throttle opening control signal determined by the electronic throttle output signal and a throttle opening control signal determined by the engine speed according to the minimum curve of the fuel consumption rate in an off-line manner; 2. detecting and calculating an absolute instantaneous value L of a difference between a throttle opening control signal determined by the electronic throttle and a throttle opening control signal determined by the engine speed according to a fuel consumption rate minimum curve on line; 3. the ratio of L to Lo is the weight.
When the weighting function is realized outside the engine controller, the electronic throttle has a signal, an actual throttle opening control signal given by the weighting module is directly sent to the throttle executing motor, the electronic throttle does not have signal output without passing through the engine controller, and the engine performs oil injection at idle speed.
When the weighting function is realized in the engine controller, the electronic throttle has a signal, the weighting module is a program, the weighting result is sent to the throttle executing motor through the corresponding output port of the engine controller, the electronic throttle has no signal output, and the engine idles to inject oil.
The microprocessor may be a single chip microcomputer.
In the description of the present invention, it should be noted that the throttle control motor is equivalent to the throttle actuator motor, and the terms "first", "second", "left end", "right end", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product is used, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to be referred must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (5)
1. An engine throttle control signal generating device, the device comprising a microprocessor, characterized in that: the device has two input signals and one output signal, the two input signals are engine speed signalsnAnd throttle control signals generated by an engine controllerQCThe output signal is the actual throttle control signalQASaid actual throttle control signalQAFeeding to a throttle control motor, said throttle control signalQCAnd the data are not sent to a throttle control motor, and the microprocessor stores the data of the curve with the minimum fuel consumption rate of the engine in an off-line mode.
2. A method based on the device of claim 1, wherein: the method comprises the following steps:
step 1: establishing a minimum curve of the fuel consumption rate of the engine off line;
step 2: on-line detection of engine speed signalnAnd electronic throttle pedal signalhSaid engine speed signalnThrottle control signal obtained by fuel consumption rate minimum curveQNThe electronic throttle pedal signalhObtaining throttle control signal via engine controller outputQCSaid throttle control signalQCAnd throttle control signalQNWeighted sum to obtain actual throttle control signal of engineQA；
The actual throttle control signalQAThe calculation formula of (a) is as follows:
QA＝（1-α）QN＋αQC（1）
wherein the content of the first and second substances,αis a weighted weight (0 <)α＜1）；
And step 3: the weighted weight α is obtained as follows:
(1) Offline determination of throttle control signalsQCAnd throttle control signalQNThe maximum absolute value of the difference L0;
(2) On-line detection and calculation throttle controlSignal making deviceQCAnd throttle control signalQNThe absolute instantaneous value of the difference L;
(3) The ratio of L to L0 is used to obtain the weighted weightα。
3. An engine throttle control signal generating method according to claim 2, characterized in that: the electronic throttle pedal signalhWhen there is a signal, the actual throttle control signalQAA control motor fed to the throttle; the electronic throttle pedal signalhAnd when no signal exists, the engine idles to inject oil.
4. An engine throttle control signal generating method according to claim 2, characterized in that: in step 1, the method for obtaining the minimum curve of the fuel consumption rate of the engine is as follows:
a. the rotating speed of the main shaft of the engine is stabilized at a determined value through an electronic accelerator pedalNDisturbing the load of the output end of the engine, changing the opening of the throttle valve from small to large in an allowable range, and searching the opening of the throttle valve when the fuel consumption rate of the engine is minimumQ1 is prepared fromQ1，N1) Determining a point on a relationship curve between the engine speed and the throttle opening degree when the fuel consumption rate is minimum;
b. by sequentially varying the speed of rotation of the engine main shaftN1，N2，......，Nm, sequentially searching the opening degree of a throttle valve when the fuel consumption rate is minimumQ1，Q2，......，Qm for m points (, (Q1，N1），（Q2，N2），......，（Qm，Nm)) curve fitting to obtain a curve with the minimum fuel consumption rate of the engine;
c. the opening degree of the throttle valveQ1，Q2，......，Qm is the throttle control signal generated by the engine controller when the fuel consumption rate is minimum at the corresponding rotating speedQC。
5. An engine throttle control signal generating method according to claim 2, characterized in that: the engine controller realizes the weighted sum method, the result of the weighted sum is sent to an execution motor of the throttle valve through a corresponding output port A of the engine controller, and when no signal is sent by a pedal signal h of the electronic throttle valve, the engine idles to inject oil.
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