CN108644024A - A kind of control method of diesel engine EGR valve - Google Patents
A kind of control method of diesel engine EGR valve Download PDFInfo
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- CN108644024A CN108644024A CN201810392829.9A CN201810392829A CN108644024A CN 108644024 A CN108644024 A CN 108644024A CN 201810392829 A CN201810392829 A CN 201810392829A CN 108644024 A CN108644024 A CN 108644024A
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- ecu
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Classifications
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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
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0077—Control of the EGR valve or actuator, e.g. duty cycle, closed loop control of position
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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
- F02D41/2406—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
- F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
-
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The present invention provides a kind of control method of diesel engine EGR valve, including：Diesel engine ECU after the power is turned on, judge whether the EGR had carried out self study for the first time, if it is not, then judging whether the EGR valve meets activation self study condition for the first time；In setting time, if firing key is in ON gears, and gas pedal tramples number and reaches setting number, then activates self study for the first time；When firing key is in OFF gears, if the EGR valve meets automatically cleaning condition, automatically cleaning is carried out, is otherwise terminated；After the EGR valve automatically cleaning, the EGR valve carries out conventional self study.The present invention can improve the control accuracy of EGR valve, increase the functional reliability of EGR valve.
Description
Technical field
The present invention relates to technical field of engine control more particularly to a kind of control methods of diesel engine EGR valve.
Background technology
EGR (Exhaust Gas Recirculation) recycles for exhaust gas, i.e., draws the exhaust gas that engine is discharged again
It burns into combustion chamber after entering air inlet pipe and live gas mixing.EGR valve is installed on engine, for control enter into
The amount of recirculated exhaust gas of gas system.With the continuous upgrading of emission regulation, EGR valve needs to accurately control the exhaust gas into engine
Amount.Specifically, the aperture that EGR valve is adjusted by ECU (Electronic Control Unit), to accurately control into hair
The exhausted air quantity of motivation.In this way, participating in burning by exhaust gas to reduce the temperature of combustion chamber, improves burning situation, reduces engine
Bear, effectively reduce the discharge of NOx.
EGR valve is critical component, and the reliability of working performance directly constrains the accuracy of exhausted air quantity control.It is most of
EGR valve drives for direct current generator, integrated position sensor in EGR valve, exports aperture and feedback voltage is in a linear relationship.By
It is installed in exhaust environment in EGR valve, during long-term use, it is special that one side high-temp waste gas influences EGR valve inner sensor
Property output, on the other hand over time, since a large amount of carbon distributions and coking invest valve block outer surface, valve block and constantly wear
Etc. reasons cause its EGR valve zero generate drift.Therefore, it is necessary to detect, record EGR valve again by ECU in standard-sized sheet, fully closed
When the voltage value that feeds back, and reformulate with this characteristic curve of sensor output.Reformulate Sensor Output Characteristic curve
Process be known as EGR valve self study, whether EGR valve self study is successfully directly related to the control accuracy of EGR valve, and then influences
The emission control of engine.
Invention content
The present invention provides a kind of control method of diesel engine EGR valve, solves existing diesel EGR valve in use,
The problem of generating drift because of the zero that carbon distribution and high-temp waste gas influence EGR valve, the control accuracy of EGR valve is caused to decline, can improve
The control accuracy of EGR valve increases the functional reliability of EGR valve.
In order to achieve the above object, the present invention provides following technical scheme：
A kind of control method of diesel engine EGR valve, including：
Diesel engine ECU after the power is turned on, judge whether the EGR had carried out self study for the first time, if it is not, then judging institute
State whether EGR valve meets activation self study condition for the first time；
In setting time, if firing key is in ON gears, and gas pedal tramples number and reaches setting number, then swashs
Self study for the first time living；
When firing key is in OFF gears, if the EGR valve meets automatically cleaning condition, automatically cleaning is carried out, is otherwise tied
Beam；
After the EGR valve automatically cleaning, the EGR valve carries out conventional self study.
Preferably, the self study for the first time includes：
The ECU sends the aperture that PWM wave controls the EGR valve；
When the ECU activates self study for the first time, the ECU adjusts the duty ratio of the PWM wave with first rate, from the
One duty ratio is quickly reduced to the second duty ratio, so that the EGR valve is in full off state and certain time, wherein institute
It is negative value to state the second duty ratio；
The closed positions of the EGR valve are repeatedly obtained by the first interval time, and closed positions signal averaging is calculated
Value；
Judge whether the closed positions signal averaging and the difference of preset Zero position signal value in the ECU are small
In predetermined threshold value, if it is not, then believing the closed positions signal averaging as the dead-center position of study for the first time of the EGR valve
Number value, and is written the ECU.
Preferably, the self study for the first time further includes：
The ECU controls PWM wave gradually rises from the second duty ratio to third duty ratio, so that the EGR valve is in complete
Open state and certain time, wherein the third duty ratio is positive value；
The fully open position of the EGR valve is repeatedly obtained by first interval time, and fully open position signal is calculated
Average value；
Judge whether the difference of the fully open position signal averaging and preset fully open position signal value in the ECU is small
In predetermined threshold value, if it is not, then believing the fully open position signal averaging as the fully open position of study for the first time of the EGR valve
Number value, and is written the ECU.
Preferably, the EGR valve meet activation automatically cleaning condition include：
The firing key is in OFF gears, and the ECU supply voltages are more than 10V, and the intake air temperature of diesel engine is in -7
Within the scope of~110 DEG C.
Preferably, the EGR valve automatically cleaning includes：
When the ECU activates automatically cleaning, the PWM wave control EGR valve that the ECU sends different duty is closed
It acts or starting work makes the EGR valve generate vibration, until automatically cleaning process terminates.
Preferably, ECU sends the PWM wave of different duty and controls the EGR valve and carry out pass action or start work and include：
The ECU sends the PWM wave of the 4th duty ratio, so that the EGR valve completion is opened to 95% aperture and starts work, and holds
Continuous the ECU sends the PWM wave of the 5th duty ratio after a certain period of time, and the EGR valve is made to complete the pass action closed to 5% aperture,
Wherein, the 4th duty ratio and the 5th duty ratio reverse phase each other；
Repeat to start work and pass action in setting time, until reaching setting number.
Preferably, the EGR valve routine self study includes：
After the EGR valve automatically cleaning, the ECU sends the PWM wave of second duty ratio, makes the EGR valve
In full off state and certain time；
The closed positions of the EGR valve are repeatedly obtained by first interval time, and closed positions letter will be calculated
Number average value is as bottom dead centre learning value.
Preferably, the EGR valve routine self study further includes：
Judge whether the bottom dead centre learning value and the difference of the Zero position signal value of study for the first time are less than default threshold
Value, if it is not, then reporting fault；
Judge whether the bottom dead centre learning value and the difference of last bottom dead centre learning value are less than predetermined threshold value, if
It is no, then reporting fault；If it is, the ECU is written in the bottom dead centre learning value.
Preferably, the EGR valve routine self study further includes：
After the completion of bottom dead centre learns, the ECU sends the PWM wave of the third duty ratio, and the EGR valve is made to be in complete
Open state and certain time；
The fully open position of the EGR valve is repeatedly obtained by first interval time, and fully open position letter will be calculated
Number average value is as top dead-centre learning value.
Preferably, the EGR valve routine self study further includes：
Judge whether the top dead-centre learning value and the difference of the fully open position signal value of study for the first time are less than default threshold
Value, if it is not, then reporting fault；
Judge whether the top dead-centre learning value and the difference of last top dead-centre learning value are less than predetermined threshold value, if
It is no, then reporting fault, if it is, the ECU is written in the top dead-centre learning value.
The present invention provides a kind of control method of diesel engine EGR valve, is learnt by oneself for the first time when powering on by controlling EGR valve
It practises, automatically cleaning and conventional self study is carried out to EGR valve when lower electric, make the closed positions of EGR valve and the dead-center position of fully open position
It keeps accurate, solves existing diesel EGR valve in use, because the zero of carbon distribution and high-temp waste gas influence EGR valve generates
The problem of drifting about, the control accuracy of EGR valve is caused to decline, can improve the control accuracy of EGR valve, increase the reliable operation of EGR valve
Property.
Description of the drawings
In order to illustrate more clearly of specific embodiments of the present invention, attached drawing needed in the embodiment will be made below
Simply introduce.
Fig. 1：It is a kind of control method flow chart of diesel engine EGR valve provided by the invention；
Fig. 2：It is self study flow chart for the first time provided in an embodiment of the present invention；
Fig. 3：It is automatically cleaning flow chart provided in an embodiment of the present invention；
Fig. 4：It is conventional self study flow chart provided in an embodiment of the present invention.
Specific implementation mode
In order to make those skilled in the art more fully understand the scheme of the embodiment of the present invention, below in conjunction with the accompanying drawings and implement
Mode is described in further detail the embodiment of the present invention.
It is easy what null offset and control accuracy caused by carbon distribution and high-temp waste gas declined for the EGR valve of present engine
Problem.The present invention provides a kind of control method of diesel engine EGR valve, and self study for the first time is carried out by controlling EGR valve when powering on, under
Automatically cleaning and conventional self study are carried out to EGR valve when electric, the dead-center position of the closed positions and fully open position that make EGR valve keeps accurate
Really, it solves existing diesel EGR valve in use, because the zero of carbon distribution and high-temp waste gas influence EGR valve generates drift, makes
The problem of declining at the control accuracy of EGR valve, can improve the precision of EGR valve self study, increase the functional reliability of EGR valve.
As shown in Figure 1, be a kind of control method flow chart of diesel engine EGR valve provided by the invention, this method include with
Under：
S1：Diesel engine ECU after the power is turned on, judge whether the EGR had carried out self study for the first time, if it is not, then sentencing
Whether the EGR valve of breaking meets activation self study condition for the first time；
S2：In setting time, if firing key is in ON gears, and gas pedal tramples number and reaches setting number,
Then activate self study for the first time；
S3：When firing key is in OFF gears, if the EGR valve meets automatically cleaning condition, automatically cleaning is carried out, it is no
Then terminate；
S4：After the EGR valve automatically cleaning, the EGR valve carries out conventional self study.
Specifically, the ECU of diesel engine after the power is turned on, due to being preset with the default value of EGR valve in ECU, the value as manufacture
Equipment.Judge as shown in Fig. 2, carrying out self study for the first time, if ECU is after the power is turned on, firing key is in ON gears, and in setting time
Interior gas pedal tramples number and reaches setting number, then meets activation self study condition for the first time.EGR valve carries out closed positions self-study
It practises and fully open position self study.As shown in figure 3, when firing key is in OFF gears, automatically cleaning judgement is carried out, is being met from clear
When clean condition, multiple to EGR valve progress starts work and pass action, so that EGR valve is vibrated, to realize automatically cleaning.As shown in figure 4,
After automatically cleaning, carries out conventional self study and judge, proceed by closed positions self study and the fully open position self study of EGR valve.
It should be noted that the switch of EGR valve can rotate and reverse realization by motor.Pass through EGR valve automatically cleaning and self study
Operation, effective solution EGR valve because during carbon distribution, the manufacture deviation of different valve, use the factors such as position deviation of EGR valve make
At EGR valve position it is inaccurate, cause EGR rate to calculate deviation, engine combustion and discharge had an impact.
The self study for the first time includes：
S21：The ECU sends the aperture that PWM wave controls the EGR valve；
S22：When the ECU activates self study for the first time, the ECU adjusts the duty ratio of the PWM wave with first rate,
It is quickly reduced to the second duty ratio from the first duty ratio, so that the EGR valve is in full off state and certain time,
In, second duty ratio is negative value；
S23：The closed positions of the EGR valve are repeatedly obtained by the first interval time, and closed positions signal is calculated
Average value；
S24：Judging the closed positions signal averaging and the difference of preset Zero position signal value in the ECU is
It is no to be less than predetermined threshold value, if it is not, then using the closed positions signal averaging as the zero of the study for the first time position of the EGR valve
Signal value is set, and the ECU is written.
It should be noted that having pressing force when in order to keep EGR valve fully closed, the duty ratio for the PWM wave that ECU is sent is negative
Value, therefore, the first duty ratio can be -10%.Meanwhile when EGR valve starts power up, being closed, it is sent with ECU
PWM wave controls aperture, and the first duty ratio can be positive value or negative value, specifically be set with actual requirement.
Further, the self study for the first time further includes：
S25：The ECU controls PWM wave gradually rises from the second duty ratio to third duty ratio, so that at the EGR valve
In full-gear and certain time, wherein the third duty ratio is positive value；
S26：The fully open position of the EGR valve is repeatedly obtained by first interval time, and fully open position is calculated
Signal averaging；
S27：Judging the difference of the fully open position signal averaging and preset fully open position signal value in the ECU is
It is no to be less than predetermined threshold value, if it is not, then using the fully open position signal averaging as the standard-sized sheet of the study for the first time position of the EGR valve
Signal value is set, and the ECU is written.
In practical applications, after powering on 2.5s, ECU detects that the self study value of standard-sized sheet or fully closed position has been equal to default value (
Calibration is inside ECU).Think that the valve did not learn at this time.It is more than that 50% position 3 times (cannot to power on accelerator pedal in 15s
More than 3 times), activate self-learning function for the first time.When first time, self study started, with the rate of 200%/s by PWM from current value
- 20% is gone to, until after valve stops mobile 200ms, reads 5 position signals (intervals 20ms keep PWM-20%), and calculate flat
Mean value records closed positions.After fully closed position study, PWM gradually rises up to 40%, until after valve stops mobile 200ms, reads
5 position signals (intervals 20ms keep PWM 40%), and average value is calculated, record fully open position.After study, check
As a result.
The EGR valve meets activation automatically cleaning condition：
The firing key is in OFF gears, and the ECU supply voltages are more than 10V, and the intake air temperature of diesel engine is in -7
Within the scope of~110 DEG C.
Specifically, when automatically cleaning being arranged under diesel engine electric, the normal use of vehicle can not be influenced.Meanwhile if into
Temperature spends height and illustrates that engine is still working, the too low normal starting for being unfavorable for vehicle motor of temperature.In practical applications,
It can also be engine speed and mileage number as the self-cleaning condition of activation, when engine speed is less than given threshold
Or mileage number reach setting mileage threshold value when may all activate automatically cleaning.It is effectively eliminated and is gathered in by the self cleaning method
The deposit of EGR valve, it is ensured that EGR valve stabilization, reliable working condition promote its service life.
The EGR valve automatically cleaning includes：When the ECU activates automatically cleaning, the ECU sends the PWM of different duty
The wave control EGR valve carries out pass action or starting work makes the EGR valve generate vibration, until automatically cleaning process terminates.
Further, ECU sends the PWM wave of different duty and controls the EGR valve and carry out pass action or start work and include：Institute
The PWM wave that ECU sends the 4th duty ratio is stated, the EGR valve completion is made to open to the work that starts of 95% aperture, and certain time
Afterwards, the ECU sends the PWM wave of the 5th duty ratio, so that the EGR valve is completed the pass action closed to 5% aperture, wherein the 4th
Duty ratio and the 5th duty ratio reverse phase each other；Repeat to start work and pass action in setting time, until reaching setting time
Number.
In practical applications, after firing key is in off gears, ECU judges whether EGR valve has automatically cleaning condition,
Condition requires：For intake air temperature between -7 110 degree of degree, ECU supply voltages are more than 10V, while meeting lower electricity 500ms
Afterwards, control EGR valve is to 95% position, when lasting 400ms, control valve to 5% position are not moved in valve holding；When valve holding is not moved
And continue 400ms, control valve to 95% position；This opening and closing process is repeated 8 times, and all processes needs are completed in 15s, not so directly
It connects and exits cleaning procedure.
The EGR valve routine self study includes：
S41：After the EGR valve automatically cleaning, the ECU sends the PWM wave of second duty ratio, makes described
EGR valve is in full off state and certain time；
S42：The closed positions of the EGR valve are repeatedly obtained by first interval time, and fully closed position will be calculated
Signal averaging is set as bottom dead centre learning value.
Further, the EGR valve routine self study further includes：
S43：Judge whether the bottom dead centre learning value and the difference of the Zero position signal value of study for the first time are less than in advance
If threshold value, if it is not, then reporting fault；
S44：Judge whether the bottom dead centre learning value and the difference of last bottom dead centre learning value are less than predetermined threshold value, such as
Fruit is no, then reporting fault；If it is, the ECU is written in the bottom dead centre learning value.
The EGR valve routine self study further includes：
S45：After the completion of bottom dead centre learns, the ECU sends the PWM wave of the third duty ratio, makes at the EGR valve
In full-gear and certain time；
S46：The fully open position of the EGR valve is repeatedly obtained by first interval time, and standard-sized sheet position will be calculated
Signal averaging is set as top dead-centre learning value.
The EGR valve routine self study further includes：
S47：Judge whether the top dead-centre learning value and the difference of the fully open position signal value of study for the first time are less than in advance
If threshold value, if it is not, then reporting fault；
S48：Judge whether the top dead-centre learning value and the difference of last top dead-centre learning value are less than predetermined threshold value, such as
Fruit is no, then reporting fault, if it is, the ECU is written in the top dead-centre learning value.
In practical applications, conventional self study carries out after automatically cleaning, and after automatically cleaning 0.1s, closed-loop control EGR position is extremely
0%, continue 100ms when EGR position control error is less than 10%, then from current PWM with the rate transition of 200%/s to -20%
PWM, and maintain to read after 0.3s. herein 5 position signal values (if wherein some positional value deviation for putting is larger, meeting
Weeded out, avoid being the unreasonable deviation interference caused by accidentalia) and be averaged (at this time still in -20%PWM controls
Under system, read be separated by 20ms every time), as bottom dead centre learning value.After bottom dead centre is finished, closed-loop control EGR position is extremely
100%, continue 200ms when EGR position control error is less than 15%, then from current PWM with the rate transition of 200%/s to 40%
PWM, and maintain to read after 0.2s. herein 6 position signal values (if wherein some positional value deviation for putting is larger, meeting
Weeded out, avoid being the unreasonable deviation interference caused by accidentalia) and be averaged (at this time still in 40%PWM controls
Under system, every time read be separated by 20ms) it is common self study process must be completed in 8s, not so directly exit learning program.
As it can be seen that the present invention provides a kind of control method of diesel engine EGR valve, carried out for the first time when powering on by controlling EGR valve
Self study carries out automatically cleaning and conventional self study to EGR valve when lower electric, makes the closed positions of EGR valve and the zero of fully open position
Position keeps accurate, solves existing diesel EGR valve in use, because of the zero of carbon distribution and high-temp waste gas influence EGR valve
The problem of generating drift, the control accuracy of EGR valve is caused to decline, can improve the control accuracy of EGR valve, increase the work of EGR valve
Reliability.
The structure, feature and effect of the present invention, the above institute is described in detail according to diagrammatically shown embodiment above
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range, every structure according to the present invention shown in drawing
Change made by thinking, or is revised as the equivalent embodiment of equivalent variations, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (10)
1. a kind of control method of diesel engine EGR valve, which is characterized in that including：
Diesel engine ECU after the power is turned on, judge whether the EGR had carried out self study for the first time, if it is not, then judge described in
Whether EGR valve meets activation self study condition for the first time；
In setting time, if firing key is in ON gears, and gas pedal tramples number and reaches setting number, then activates head
Secondary self study；
When firing key is in OFF gears, if the EGR valve meets automatically cleaning condition, automatically cleaning is carried out, is otherwise terminated；
After the EGR valve automatically cleaning, the EGR valve carries out conventional self study.
2. the control method of diesel engine EGR valve according to claim 1, which is characterized in that the self study for the first time includes：
The ECU sends the aperture that PWM wave controls the EGR valve；
When the ECU activates self study for the first time, the ECU adjusts the duty ratio of the PWM wave with first rate, is accounted for from first
Empty ratio is quickly reduced to the second duty ratio, so that the EGR valve is in full off state simultaneously certain time, wherein described the
Two duty ratios are negative value；
The closed positions of the EGR valve are repeatedly obtained by the first interval time, and closed positions signal averaging is calculated；
Judge whether the closed positions signal averaging and the difference of preset Zero position signal value in the ECU are less than in advance
If threshold value, if it is not, then using the closed positions signal averaging as the study Zero position signal for the first time of the EGR valve
Value, and the ECU is written.
3. the control method of diesel engine EGR valve according to claim 2, which is characterized in that the self study for the first time is also wrapped
It includes：
The ECU controls PWM wave gradually rises from the second duty ratio to third duty ratio, so that the EGR valve is in standard-sized sheet shape
State and certain time, wherein the third duty ratio is positive value；
The fully open position of the EGR valve is repeatedly obtained by first interval time, and fully open position signal averaging is calculated
Value；
Judge whether the fully open position signal averaging and the difference of preset fully open position signal value in the ECU are less than in advance
If threshold value, if it is not, then using the fully open position signal averaging as the fully open position signal of study for the first time of the EGR valve
Value, and the ECU is written.
4. the control method of diesel engine EGR valve according to claim 3, which is characterized in that the EGR valve meets activation certainly
Clean conditions include：
The firing key be in OFF gear, the ECU supply voltages be more than 10V, and the intake air temperature of diesel engine be in -7~
Within the scope of 110 DEG C.
5. the control method of diesel engine EGR valve according to claim 4, which is characterized in that the EGR valve automatically cleaning packet
It includes：
When the ECU activates automatically cleaning, the PWM wave control EGR valve that the ECU sends different duty carries out pass action
Or starting work makes the EGR valve generate vibration, until automatically cleaning process terminates.
6. the control method of diesel engine EGR valve according to claim 5, which is characterized in that ECU sends different duty
The PWM wave control EGR valve carries out pass action or starts work：
The ECU sends the PWM wave of the 4th duty ratio, so that the EGR valve completion is opened to 95% aperture and starts work, and continues one
After fixing time, the ECU sends the PWM wave of the 5th duty ratio, and the EGR valve is made to complete the pass action closed to 5% aperture,
In, the 4th duty ratio and the 5th duty ratio reverse phase each other；
Repeat to start work and pass action in setting time, until reaching setting number.
7. the control method of diesel engine EGR valve according to claim 6, which is characterized in that the EGR valve routine self study
Including：
After the EGR valve automatically cleaning, the ECU sends the PWM wave of second duty ratio, and the EGR valve is made to be in
Full off state and certain time；
The closed positions of the EGR valve are repeatedly obtained by first interval time, and closed positions signal will be calculated and put down
Mean value is as bottom dead centre learning value.
8. the control method of diesel engine EGR valve according to claim 7, which is characterized in that the EGR valve routine self study
Further include：
Judge whether the bottom dead centre learning value and the difference of the Zero position signal value of study for the first time are less than predetermined threshold value, such as
Fruit is no, then reporting fault；
Judge whether the bottom dead centre learning value and the difference of last bottom dead centre learning value are less than predetermined threshold value, if it is not, then
Reporting fault；If it is, the ECU is written in the bottom dead centre learning value.
9. the control method of diesel engine EGR valve according to claim 8, which is characterized in that the EGR valve routine self study
Further include：
After the completion of bottom dead centre learns, the ECU sends the PWM wave of the third duty ratio, and the EGR valve is made to be in standard-sized sheet shape
State and certain time；
The fully open position of the EGR valve is repeatedly obtained by first interval time, and fully open position signal will be calculated and put down
Mean value is as top dead-centre learning value.
10. the control method of diesel engine EGR valve according to claim 9, which is characterized in that the EGR valve is routinely learnt by oneself
Habit further includes：
Judge whether the top dead-centre learning value and the difference of the fully open position signal value of study for the first time are less than predetermined threshold value, such as
Fruit is no, then reporting fault；
Judge whether the top dead-centre learning value and the difference of last top dead-centre learning value are less than predetermined threshold value, if it is not, then
Reporting fault, if it is, the ECU is written in the top dead-centre learning value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810392829.9A CN108644024B (en) | 2018-04-27 | 2018-04-27 | Control method of EGR valve of diesel engine |
Applications Claiming Priority (1)
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| CN110873645A (en) * | 2019-11-28 | 2020-03-10 | 安徽江淮汽车集团股份有限公司 | Exhaust gas recirculation valve reliability judgment method and device and storage medium |
| CN111075576A (en) * | 2019-12-02 | 2020-04-28 | 一汽解放汽车有限公司 | Self-learning method for zero position of connecting rod motor separation type EGR valve |
| WO2020098500A1 (en) * | 2018-11-18 | 2020-05-22 | 谢梦 | Valve control method and control terminal |
| CN111350584A (en) * | 2020-03-11 | 2020-06-30 | 吉利汽车研究院（宁波）有限公司 | Control method and control system for supercharging system |
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| CN111715652A (en) * | 2020-05-06 | 2020-09-29 | 中国船舶重工集团公司第七O三研究所无锡分部 | Method for determining cleaning time of water solution of through-flow part of marine gas turbine |
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| CN112594071A (en) * | 2020-12-08 | 2021-04-02 | 安徽江淮汽车集团股份有限公司 | EGR valve control method, control device and computer readable storage medium |
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| CN109298731A (en) * | 2018-11-18 | 2019-02-01 | 湖南同能机电科技有限公司 | A kind of self-cleaning controller of reciprocating machine device and method |
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| CN110873645A (en) * | 2019-11-28 | 2020-03-10 | 安徽江淮汽车集团股份有限公司 | Exhaust gas recirculation valve reliability judgment method and device and storage medium |
| CN111075576A (en) * | 2019-12-02 | 2020-04-28 | 一汽解放汽车有限公司 | Self-learning method for zero position of connecting rod motor separation type EGR valve |
| CN111350584B (en) * | 2020-03-11 | 2021-04-27 | 吉利汽车研究院（宁波）有限公司 | Control method and control system for supercharging system |
| CN111350584A (en) * | 2020-03-11 | 2020-06-30 | 吉利汽车研究院（宁波）有限公司 | Control method and control system for supercharging system |
| CN111577476B (en) * | 2020-04-26 | 2022-03-15 | 东风汽车集团有限公司 | Hybrid power engine gear information learning method |
| CN111577476A (en) * | 2020-04-26 | 2020-08-25 | 东风汽车集团有限公司 | Hybrid power engine gear information learning method |
| CN111715652A (en) * | 2020-05-06 | 2020-09-29 | 中国船舶重工集团公司第七O三研究所无锡分部 | Method for determining cleaning time of water solution of through-flow part of marine gas turbine |
| CN112319497A (en) * | 2020-10-22 | 2021-02-05 | 黄冈格罗夫氢能汽车有限公司 | Self-learning calibration method and system for hydrogen energy automobile fuel cell engine back pressure valve |
| CN112648087A (en) * | 2020-12-07 | 2021-04-13 | 潍柴动力股份有限公司 | Self-learning control method and device for engine EGR valve |
| CN112594071A (en) * | 2020-12-08 | 2021-04-02 | 安徽江淮汽车集团股份有限公司 | EGR valve control method, control device and computer readable storage medium |
| CN112648115A (en) * | 2020-12-24 | 2021-04-13 | 潍柴动力股份有限公司 | Engine EGR self-cleaning method and device |
| CN112631125A (en) * | 2020-12-28 | 2021-04-09 | 潍柴动力股份有限公司 | Throttle valve self-learning control method and device, storage medium and electronic equipment |
| CN112631125B (en) * | 2020-12-28 | 2022-11-29 | 潍柴动力股份有限公司 | Throttle valve self-learning control method and device, storage medium and electronic equipment |
| CN115217647A (en) * | 2021-11-08 | 2022-10-21 | 广州汽车集团股份有限公司 | Control method of exhaust gas recirculation valve |
| CN114776456A (en) * | 2022-03-18 | 2022-07-22 | 潍柴动力股份有限公司 | EGR valve self-learning control method and controller of vehicle |
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