CN108843465B - Compensation device and compensation control method based on direct-current motor EGR valve - Google Patents
Compensation device and compensation control method based on direct-current motor EGR valve Download PDFInfo
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- CN108843465B CN108843465B CN201810479282.6A CN201810479282A CN108843465B CN 108843465 B CN108843465 B CN 108843465B CN 201810479282 A CN201810479282 A CN 201810479282A CN 108843465 B CN108843465 B CN 108843465B
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- egr valve
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- spring force
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003068 static effect Effects 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 12
- 230000010355 oscillation Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- F02M26/52—Systems for actuating EGR valves
- F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D21/00—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas
- F02D21/06—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air
- F02D21/08—Controlling engines characterised by their being supplied with non-airborne oxygen or other non-fuel gas peculiar to engines having other non-fuel gas added to combustion air the other gas being the exhaust gas of engine
-
- 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
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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
A compensation device and a compensation control method based on an EGR valve of a direct current motor are disclosed, the device comprises an EGR valve opening measuring module, an EGR valve opening difference calculating module and a spring elasticity compensation module, the EGR valve opening measuring module is connected with the EGR valve opening difference calculating module, and the EGR valve opening difference calculating module is connected with the spring elasticity compensation module; the method comprises the following steps: 1. the EGR valve opening measuring module obtains the actual opening L' of the last period of the EGR valvePractice ofAnd the actual opening L of the current periodPractice of(ii) a 2. The EGR valve opening difference calculation module calculates the absolute value | L of the actual opening difference of the EGR valve in two periods before and after the EGR valvePractice of－L´Practice ofAn | radical; 3. when the EGR valve is in a motion state, outputting a spring force compensation value y = 0; when the EGR valve is in a static state, outputting a corresponding spring force compensation value y. The problem of overshoot and even oscillation appearing in the opening control process of the EGR valve is solved.
Description
Technical field
The present invention relates to a kind of EGR valve compensation methodes, more specifically to a kind of compensation based on direct current generator EGR valve
Device and compensating control method belong to engine component technical field.
Background technique
Gas recirculation system (Exhaust Gas Recirculation, abbreviation EGR) is by the useless of engine generation
The sub-fraction of gas sends the technology that cylinder is burnt once again back to by EGR valve again.Contain in the gas being discharged after combustion in IC engine
Oxygen amount is extremely low, this discharge gas can be such that oxygen concentration in air inlet reduces after mixing with air inlet, and in burning, (highest) temperature can drop
It is low, to inhibit the generation of nitrogen oxides (NOx)；But excessive exhaust gas in the circulating cycle will shadow engine performance and cause
The deterioration of other emissions, therefore under different operating conditions, the exhausted air quantity into cylinder is to influence engine emission and engine row
An important factor for being laid flat weighing apparatus.
EGR valve is the important actuator of egr system, and the dynamic response of EGR valve directly affects the exhausted air quantity for introducing air inlet side,
Therefore it needs to control that EGR valve is made fast, accurately to reach target aperture.Currently, universal control method is according to oil mass, revolving speed
Equal signals obtain EGR valve target aperture, referring to fig. 4.But the elastic force of return spring is not compensated in the control strategy
Control, therefore when EGR valve aperture changes, the overshoot of dynamic response is excessive, and regulating time is too long, leads to EGR valve
Control precision be unsatisfactory for requiring.
Summary of the invention
The present invention is asked for overshoot is excessive, regulating time is too long existing for existing EGR valve opening degree control procedure etc.
Topic, provides a kind of compensation device and compensating control method based on direct current generator EGR valve.
To achieve the above object, the technical solution of the invention is as follows: a kind of compensation dress based on direct current generator EGR valve
It sets, including EGR valve aperture measurement module, EGR valve aperture difference calculating module and spring force compensating module, the EGR valve
Aperture measurement module is used to obtain the practical aperture L ' of a cycle in EGR valveIt is practicalWith the practical aperture L of current periodIt is practical, described
EGR valve aperture difference calculating module be used to calculate the absolute value of former and later two periods of EGR valve practical aperture difference | LIt is practical- L
´It is practical|, the spring force compensating module is used to delivery spring stretch compensation value, and EGR valve aperture measurement module and EGR valve are opened
Difference calculating module connection is spent, EGR valve aperture difference calculating module is connected with spring force compensating module.
A kind of compensating control method based on direct current generator EGR valve, includes the steps that following: step 1, and EGR valve aperture is surveyed
Measure the practical aperture L ' that module obtains the upper a cycle of EGR valveIt is practicalWith the practical aperture L of current periodIt is practical；Step 2, EGR valve
The absolute value of aperture difference calculating module calculating former and later two periods of EGR valve practical aperture difference | LIt is practical- L 'It is practical|, when | LIt is practical?
L´It is practical| > threshold value L1, think that EGR valve is kept in motion, as | LIt is practical- L 'It is practical|≤threshold value L1, think EGR valve be in it is static
State, threshold value L1For positive value, threshold value L1 occurrence passes through Experimental Calibration；Step 3, when EGR valve is kept in motion, spring
Stretch compensation module delivery spring stretch compensation value y=0；When EGR valve remains static, the output of spring force compensating module
Corresponding spring force offset y.
When EGR valve remains static, spring force compensating module exports corresponding spring force benefit in the step 3
It repays value y and specifically includes following content: 1) as the target aperture L of EGR valveTargetWith practical aperture LIt is practicalDifference △ L be greater than threshold value
L2When, output value, step-length X based on A0Incremental spring force offset y=A, y=y+X0, wherein, X0And L2It is all positive value；
2) as the target aperture L of EGR valveTargetWith practical aperture LIt is practicalDifference △ L be less than threshold value-L2When, output based on-A to be worth, walk
Long-X0The spring force offset y=- A, y=y-X to successively decrease0, wherein A, X0And L2It is all positive value；3) when the target aperture of EGR valve
LTargetWith practical aperture LIt is practicalDifference △ L absolute value be less than L2When, delivery spring stretch compensation value y=0.
Compared with prior art, the beneficial effects of the present invention are:
When EGR valve aperture changes in the present invention, control is compensated to spring force, when EGR valve is static and EGR
When valve target aperture and practical aperture deviation are positive/negative, positive/negative offset is exported；When EGR valve movement or deviation are zero,
The offset of output is zero.Therefore realize and control compensated to the elastic force of different attribute spring solve the control of EGR valve aperture
The problem of overshoot occurred in the process is even vibrated.
Detailed description of the invention
Fig. 1 is flow chart of the present invention.
Fig. 2 is that EGR valve target aperture compensates control block diagram in the present invention.
Fig. 3 is return spring stretch compensation control block diagram in the present invention.
Fig. 4 is existing EGR valve control flow chart.
Specific embodiment
Below in conjunction with Detailed description of the invention and specific embodiment, the present invention is described in further detail.
Embodiment one:
A kind of compensation device based on direct current generator EGR valve, including EGR valve aperture measurement module, EGR valve aperture difference meter
Module and spring force compensating module are calculated, the EGR valve aperture measurement module is usually EGR valve position sensor.Described
EGR valve aperture measurement module is used to obtain the practical aperture L ' of a cycle in EGR valveIt is practicalWith the practical aperture of current period
LIt is practical, the EGR valve aperture difference calculating module is used to calculate the absolute value of former and later two periods of EGR valve practical aperture difference |
LIt is practical- L 'It is practical|, the spring force compensating module is used to delivery spring stretch compensation value；EGR valve aperture measurement module and
The connection of EGR valve aperture difference calculating module, EGR valve aperture difference calculating module are connected with spring force compensating module.
Embodiment two:
Referring to Fig. 1 to Fig. 3, a kind of compensating control method based on direct current generator EGR valve is related in gas recirculation system
The compensation of EGR valve return spring elastic force is controlled, specifically include following step:
Step 1, EGR valve aperture measurement module obtain the practical aperture L ' of the upper a cycle of EGR valveIt is practicalAnd current period
Practical aperture LIt is practical。
Step 2, EGR valve aperture difference calculating module calculate the absolute value of former and later two periods of EGR valve practical aperture difference
| LIt is practical- L 'It is practical|, when | LIt is practical- L 'It is practical| > threshold value L1, it is believed that EGR valve is kept in motion；When | LIt is practical- L 'It is practical|≤threshold value
L1, it is believed that EGR valve remains static, threshold value L1For positive value.Threshold value L1 be used to judge whether EGR valve is kept in motion, when
Former and later two period EGR valve physical locations change (i.e. practical opening value is unequal twice) when, it is believed that EGR valve be movement
's；Therefore threshold value L1 is introduced in order to exclude shake and other interference, threshold value L1 occurrence passes through Experimental Calibration.
Step 3, when EGR valve is kept in motion, spring force compensating module delivery spring stretch compensation value y=0；When
When EGR valve remains static, spring force compensating module exports corresponding spring force offset y.
Specifically, when EGR valve remains static, spring force compensating module exports corresponding bullet in the step 3
Spring force offset y specifically includes following content:
1) as the target aperture L of EGR valveTargetWith practical aperture LIt is practicalDifference △ L be greater than threshold value L2When, it exports using A as base
Plinth value, step-length X0Incremental spring force offset y=A, y=y+X0, wherein, X0And L2It is all positive value, A value passes through Experimental Calibration,
X0For the increment of each period spring-compensating value, X0Value passes through Experimental Calibration.I.e. as △ L > L2When, the spring force that exports first
Offset is A, i.e. y=A；It in following each period, exports with X0Spring-compensating the value y, i.e. y=y+X being incremented by for step-length0。
2) as the target aperture L of EGR valveTargetWith practical aperture LIt is practicalDifference △ L be less than threshold value-L when, i.e. LTarget-LIt is practical=△
L；△ L <-L2When, output is by value, step-length-X based on-A0The spring force offset y=- A, y=y-X to successively decrease0, wherein A, X0
And L2It is all positive value.I.e. as △ L <-L2When, the spring force offset exported first is-A, i.e. y=- A；Following each week
Phase exports with-X0For spring-compensating the value y, i.e. y=y-X of increments0。
3) as the target aperture L of EGR valveTargetWith practical aperture LIt is practicalDifference △ L absolute value be less than L2When, i.e. LTarget-
LIt is practical=△ L, | △ L | < L2) when, delivery spring stretch compensation value y=0.
Previous step 1), 2) and 3) in threshold value L2 use to determine whether delivery spring stretch compensation value, and determine spring bullet
Force compensating value；When the difference of target aperture and practical aperture is more than certain threshold value, indicate that EGR valve will be from static variation at this time
To motion state, so exporting corresponding spring force offset.Therefore threshold value L is introduced in order to exclude the interference such as error2, threshold value
L2 passes through Experimental Calibration.
Referring to Fig. 1 to Fig. 3, existing EGR valve aperture control method is that EGR valve reality is obtained by EGR valve position sensor
The output of PID controller is converted into driving electricity by border aperture, the input with the difference of EGR valve target aperture as PID controller
The pwm signal of machine realizes the control of EGR valve aperture by H bridge driving motor.The present invention is when solving EGR valve aperture to change
Overshoot even oscillation problem, joined EGR valve spring force Compensation Strategies after PID controller；In the base of PID control
On plinth, when EGR valve aperture changes, control is compensated to spring force.When EGR valve is static and EGR valve target is opened
When degree and practical aperture deviation are positive/negative, positive/negative offset is exported；When EGR valve movement or deviation are zero, the benefit of output
Repaying value is zero, to realize the target aperture control of EGR valve.Because the difference of spring force compensated foundation value and change step can be with
Realization compensates control to the elastic force of different attribute spring, therefore solves the overshoot occurred in EGR valve opening degree control procedure
The problem of even vibrating.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, and above structure all shall be regarded as belonging to
Protection scope of the present invention.
Claims (3)
1. a kind of compensation device based on direct current generator EGR valve, it is characterised in that: including EGR valve aperture measurement module, EGR valve
Aperture difference calculating module and spring force compensating module, the EGR valve aperture measurement module are used to obtain in EGR valve one
The practical aperture L ' in periodIt is practicalWith the practical aperture L of current periodIt is practical, the EGR valve aperture difference calculating module is used to calculate
The absolute value of former and later two periods of EGR valve practical aperture difference | LIt is practical- L 'It is practical|, the spring force compensating module is used to defeated
Spring force offset out, EGR valve aperture measurement module are connected with EGR valve aperture difference calculating module, EGR valve aperture difference meter
Module is calculated to connect with spring force compensating module.
2. a kind of compensating control method based on direct current generator EGR valve, which is characterized in that include the steps that following:
Step 1, EGR valve aperture measurement module obtain the practical aperture L ' of the upper a cycle of EGR valveIt is practicalWith the reality of current period
Border aperture LIt is practical；
Step 2, EGR valve aperture difference calculating module calculate the absolute value of former and later two periods of EGR valve practical aperture difference |
LIt is practical- L 'It is practical|, when | LIt is practical- L 'It is practical| > threshold value L1, think that EGR valve is kept in motion, as | LIt is practical- L 'It is practical|≤threshold value L1、
Think that EGR valve remains static, threshold value L1For positive value, threshold value L1 occurrence passes through Experimental Calibration；
Step 3, when EGR valve is kept in motion, spring force compensating module delivery spring stretch compensation value y=0；
When EGR valve remains static, spring force compensating module exports corresponding spring force offset y.
3. a kind of compensating control method based on direct current generator EGR valve according to claim 2, which is characterized in that described
When EGR valve remains static, the corresponding spring force offset y of spring force compensating module output is specifically wrapped in step 3
Include following content:
1) as the target aperture L of EGR valveTargetWith practical aperture LIt is practicalDifference △ L be greater than threshold value L2When, output based on A value,
Step-length X0Incremental spring force offset y=A, y=y+X0, wherein A, X0And L2It is all positive value；
2) as the target aperture L of EGR valveTargetWith practical aperture LIt is practicalDifference △ L be less than threshold value-L2When, it exports based on-A
Value, step-length-X0Spring force the offset y=-A, y=y-X to successively decrease0, wherein A, X0And L2It is all positive value；
3) as the target aperture L of EGR valveTargetWith practical aperture LIt is practicalDifference △ L absolute value be less than L2When, delivery spring elastic force
Offset y=0, wherein L2It is positive value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810479282.6A CN108843465B (en) | 2018-05-18 | 2018-05-18 | Compensation device and compensation control method based on direct-current motor EGR valve |
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| CN201810479282.6A CN108843465B (en) | 2018-05-18 | 2018-05-18 | Compensation device and compensation control method based on direct-current motor EGR valve |
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| CN108843465A CN108843465A (en) | 2018-11-20 |
| CN108843465B true CN108843465B (en) | 2019-09-27 |
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| CN115407647B (en) * | 2022-10-31 | 2023-01-24 | 艾坦姆流体控制技术(山东)有限公司 | Optimized control method and three-level punching valve control system using same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56138434A (en) * | 1980-03-28 | 1981-10-29 | Toyota Motor Corp | Exhaust gas recirculating device with engine idling speed increaser |
| US4998707A (en) * | 1990-06-13 | 1991-03-12 | General Motors Corporation | Exhaust gas recirculation valve assembly |
| DE19923475A1 (en) * | 1998-06-29 | 1999-12-30 | Ford Global Tech Inc | Engine control and diagnosis system for motor vehicle internal combustion engine with exhaust gas recirculation |
| CN1352729A (en) * | 2000-02-25 | 2002-06-05 | 三菱电机株式会社 | Controller of exhaust gas recirculation valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5143170B2 (en) * | 2010-03-17 | 2013-02-13 | 日立オートモティブシステムズ株式会社 | Control method for internal combustion engine |
-
2018
- 2018-05-18 CN CN201810479282.6A patent/CN108843465B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56138434A (en) * | 1980-03-28 | 1981-10-29 | Toyota Motor Corp | Exhaust gas recirculating device with engine idling speed increaser |
| US4998707A (en) * | 1990-06-13 | 1991-03-12 | General Motors Corporation | Exhaust gas recirculation valve assembly |
| DE19923475A1 (en) * | 1998-06-29 | 1999-12-30 | Ford Global Tech Inc | Engine control and diagnosis system for motor vehicle internal combustion engine with exhaust gas recirculation |
| CN1352729A (en) * | 2000-02-25 | 2002-06-05 | 三菱电机株式会社 | Controller of exhaust gas recirculation valve |
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