CN108590895A - A kind of control system and its working method based on aperture-type EGR valve - Google Patents
A kind of control system and its working method based on aperture-type EGR valve Download PDFInfo
- Publication number
- CN108590895A CN108590895A CN201810681299.XA CN201810681299A CN108590895A CN 108590895 A CN108590895 A CN 108590895A CN 201810681299 A CN201810681299 A CN 201810681299A CN 108590895 A CN108590895 A CN 108590895A
- Authority
- CN
- China
- Prior art keywords
- aperture
- diesel engine
- egr valve
- fixed ring
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- F02M26/54—Rotary actuators, e.g. step motors
-
- 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
-
- 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
- F02D2021/083—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 controlling exhaust gas recirculation electronically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0404—Throttle position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
Landscapes
- 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 relates to a kind of control systems based on aperture-type EGR valve, including aperture-type EGR valve, the aperture-type EGR valve includes inner ring fixed ring, if the aperture valve block of closing inner ring fixed ring can be coordinated by being hingedly provided with dry plate in the inner ring fixed ring, aperture valve block periphery is provided with outer ring fixed ring, it is provided with the drive rod that outer ring fixed ring can be driven to rotate around center axis on the fixed ring periphery wall of outer ring, aperture valve on piece is provided with the drive link that aperture valve block can be driven to rotate, described drive link one end is hinged on aperture valve on piece, and the other end is hinged in the fixed ring of outer ring；The invention further relates to a kind of working methods of the control system based on aperture-type EGR valve.The present invention can be controlled the NO by exhaust branch by the aperture of control aperture-type EGR valveXTolerance, the gas for keeping burning insufficient reenter cylinder of diesel engine and burn, and so that fuel is fully burned utilization, and reduce NOXThe polluted gas such as compound are discharged into air.
Description
Technical field
The present invention relates to a kind of control system and its working method based on aperture-type EGR valve.
Technical background
Automobile is in starting, acceleration or load, due to turbocharger response lag etc. so that exhaust smoke is drastically
It increases, discharge pollution environment, harm healthy " black smoke ", while so that diesel engine low speed torque is insufficient, acceleration is poor, larger work
Ignition temperature is higher in condition lower cylinder, leads to diesel exhaust gas NOXDischarge capacity is also increased sharply, while also can cause one to cylinder of diesel engine
Setting loss is hindered.
Invention content
In view of this, the object of the present invention is to provide a kind of control system based on aperture-type EGR valve and its work
Method can be controlled the NO by exhaust branch by the aperture of control aperture-type EGR valveXTolerance keeps burning insufficient
Gas cooled down after, reenter cylinder of diesel engine and burn, so that fuel is fully burned utilization, and reduce NOX
The polluted gas such as compound are discharged into air.
The technical scheme is that：A kind of control system based on aperture-type EGR valve, including aperture-type EGR valve, it is described
Aperture-type EGR valve includes inner ring fixed ring, closing inner ring can be coordinated to fix if being hingedly provided with dry plate in the inner ring fixed ring
The aperture valve block of ring, aperture valve block periphery are provided with outer ring fixed ring, and outer ring can be driven by being provided on the fixed ring periphery wall of outer ring
The drive rod that fixed ring rotates around center axis, aperture valve on piece are provided with the drive link that aperture valve block can be driven to rotate, the biography
Lever one end is hinged on aperture valve on piece, and the other end is hinged in the fixed ring of outer ring.
Further, the inner ring fixed ring is hinged with aperture valve block by axis pin A, the drive link and aperture valve
Piece is hinged by axis pin B, and drive link is hinged with outer ring fixed ring also by axis pin B.
Further, including diesel engine, the throttle opening that detection restrictor of diesel engine aperture is provided on diesel engine passes
The speed probe of sensor and detection diesel engine speed, the diesel engine front end are provided with air inlet main road, are arranged on air inlet main road
There are compressor, compressor front end to be provided with gas concentration lwevel sensors A, diesel engine rear end is provided with exhaust main road, exhaust master
Road is provided with the turbine with compressor coaxial linkage.
Further, the exhaust branch for being connected to air inlet main road and being vented main road is provided between air inlet main road and exhaust main road
Road is set to along gas circulating direction exhaust branch inlet end on the exhaust main road of turbine front end, the setting of exhaust branch outlet side
In on the air inlet main road of compressor rear end.
Further, it on exhaust branch, is disposed with along gas circulating direction useless to cool down to exhaust gas
Gas charge air cooler and to control the aperture-type EGR valve of exhaust branch gas flow, sets between exhaust gas charge air cooler and aperture-type EGR valve
It is equipped with gas concentration lwevel sensor B, aperture-type EGR valve side is provided with the stepper motor of driving drive rod rotation, the step
Transmission mechanism is provided between stepper motor and drive rod, stepper motor side is provided with ECU controllers.
Further, the engine load sensor, speed probe, gas concentration lwevel sensors A, carbon dioxide
Concentration sensor B and stepper motor are electrically connected with ECU controllers.
Another technical solution provided by the invention is：A kind of working method of the control system based on aperture-type EGR valve,
Including the control system based on aperture-type EGR valve, it is characterised in that；
（1）When diesel engine is in speed operation operation, engine load sensor detects that the aperture of air throttle is smaller at this time,
Speed probe detects that the rotating speed of diesel engine is smaller, and transmits a signal to ECU controllers, and ECU controllers judge diesel engine
It is run in speed operation, the distributive value of diesel engine is smaller at this time, and ignition temperature is relatively low, NOXProduction quantity is less, in order to protect
The normal operation for demonstrate,proving diesel engine enables diesel engine to have sufficient oxygen air inflow, ECU controllers to control stepper motor reversion,
It drives drive rod to rotate counterclockwise by transmission mechanism, outer ring fixed ring is driven to rotate counterclockwise certain angle, by drive link,
Make aperture valve block that inner ring is fixed ring seal, at this moment aperture-type EGR valve is closed, and makes the row residing for aperture-type EGR valve
Gas branch is closed, and the exhaust gas that diesel engine generates is discharged by turbine from exhaust main road outlet side, while being driven turbine to improve and being turned
Speed drives compressor to accelerate rotation, oxygen is sent into diesel engine；
（2）When diesel engine is in medium-heavy duty operation, engine load sensor detects that the aperture of air throttle is larger at this time,
Speed probe detects that the rotating speed of diesel engine is larger, and transmits a signal to ECU controllers, and ECU controllers judge diesel engine
It is now in medium-heavy duty operation, the in-cylinder combustion of diesel engine is more violent at this time, the NO of generationXMeasure it is relatively high, in order to reduce
Diesel engine in-cylinder combustion temperature and reach reduce NOXDischarge capacity, at this time ECU controllers control stepper motor rotate forward, pass through biography
Motivation structure driving drive rod rotates clockwise, and drives outer ring fixed ring to rotate clockwise certain angle, by drive link, makes aperture
Valve block is not closed inner ring fixed ring, and certain aperture is formed, and aperture-type EGR valve is opened at this time, is made residing for aperture-type EGR valve
The front and back connection of exhaust branch, a part of exhaust gas being vented on main road cooled down by exhaust branch and by exhaust gas charge air cooler
Cooling enters air inlet main road, reenters diesel engine and burns, and achievees the effect that reduce diesel engine inside cylinder ignition temperature, into
And reduce NOXContent, when the gas concentration lwevel signal that the gas concentration lwevel sensor B on exhaust branch is detected
ECU is passed to the gas concentration lwevel signal of the gas concentration lwevel sensors A detection on air inlet main road, ECU is calculated accordingly
Go out current EGR rate compared with the Optimum EGR rate in diesel engine MAP chart, if current EGR rate is higher than Optimum EGR rate, illustrates diesel engine
Exhaust gas recirculation amount is excessive in cylinder, and burning is insufficient, and ECU controllers control stepping motor and invert certain angle, reduces aperture
Formula EGR valve aperture reduces exhaust gas recirculation amount, if current EGR rate is less than Optimum EGR rate, illustrates that burning is acute in cylinder of diesel engine
It is strong, temperature is excessively high, at this time ECU controllers control not stepper motor rotate forward certain angle, increase aperture-type EGR valve aperture so that when
Preceding EGR rate maintains at optimum value；
（3）When diesel engine is in high operating mode or oepration at full load, engine load sensor detects opening for air throttle at this time
Degree is big, and speed probe detects that the rotating speed of diesel engine is big, and transmits a signal to ECU controllers, and ECU controllers judge diesel oil
Machine is now in high operating mode or oepration at full load, and the burning of diesel engine is very violent at this time, NOXDischarge reached maximum value,
Avoid a large amount of NOXIt is discharged into air, pollutes the environment, ECU controllers control aperture-type EGR valve aperture reaches most
Greatly, make most NOXCooled down into air inlet main road by exhaust branch and by exhaust gas charge air cooler, again into
Enter diesel engine to burn, achievees the effect that reduce diesel engine inside cylinder ignition temperature, and then reduce NOXContent, when mounted on
The concentration signal that gas concentration lwevel sensor B on exhaust branch is detected is sensed with the gas concentration lwevel on air inlet main road
The concentration signal of device A detections passes to ECU, and ECU calculates current EGR rate and the Optimum EGR rate ratio in diesel engine MAP chart accordingly
Compared with, if current EGR rate is higher than Optimum EGR rate, illustrate that exhaust gas recirculation amount is excessive in cylinder of diesel engine, burns insufficient, ECU controls
Device controls stepping motor and inverts certain angle, reduces aperture-type EGR valve aperture, exhaust gas recirculation amount is reduced, if current EGR rate
Less than Optimum EGR rate, illustrate that burning is violent in cylinder of diesel engine, temperature is excessively high, stepper motor does not rotate forward for ECU controllers control at this time
Certain angle increases aperture-type EGR valve aperture so that current EGR rate maintains at optimum value.
Compared with prior art, the beneficial effects of the invention are as follows：
（1）The control method can be judged by the signal that section door jaw opening sensor and speed probe detect by ECU controllers
Go out the operating mode residing for current diesel engine, and precisely corrects control aperture-type by the signal of gas concentration lwevel sensor feedback
EGR valve aperture after the gas for keeping burning insufficient is cooled down, reenters cylinder of diesel engine and burns, fuel is made to obtain
Fully burning utilizes, and reduces NOXThe polluted gas such as compound are discharged into air, and cylinder of diesel engine is made to cool down, to diesel oil
Machine cylinder plays certain protecting effect；
（2）For the examination control method by not being precisely controlled the aperture of aperture-type EGR valve continuously into motor, reaction speed is fast, reaches
To the effect being precisely controlled.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific implementation mode elaborate.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is system operating diagram when aperture-type EGR valve of the present invention is opened；
Fig. 3 is system operating diagram when aperture-type EGR valve of the present invention is closed；
Fig. 4 is the structural schematic diagram of aperture-type EGR valve of the present invention；
Fig. 5 is structural schematic diagram when aperture-type EGR valve of the present invention is closed；
In figure：1- aperture valve blocks；2- axis pins A；3- drive links；The outer rings 4- fixed ring；5- axis pins B；6- drive rods；7- inner rings are fixed
Ring；8- transmission mechanisms；9- diesel engines；10- turbines；11- exhaust gas charge air coolers；12- gas concentration lwevel sensors B；13- aperture-types
EGR valve；14- stepper motors；15-ECU controllers；16- compressors；17- gas concentration lwevel sensors As；18- throttle openings
Sensor；19- speed probes.
Specific implementation mode
As shown in Fig. 1 ~ 5, a kind of control system based on aperture-type EGR valve, including aperture-type EGR valve 13, the aperture
Formula EGR valve includes inner ring fixed ring 7, if closing inner ring fixed ring 7 can be coordinated by being hingedly provided with dry plate in the inner ring fixed ring 7
Aperture valve block 1,1 periphery of aperture valve block is provided with outer ring fixed ring 4, be provided on 4 periphery wall of outer ring fixed ring can drive it is outer
The drive rod 6 that fixed ring 4 rotates around center axis is enclosed, the drive link 3 that aperture valve block 1 can be driven to rotate is provided on aperture valve block 1,
3 one end of the drive link is hinged on aperture valve block 1, and the other end is hinged in outer ring fixed ring 4.
In the present embodiment, the inner ring fixed ring 7 and aperture valve block 1 be hinged by axis pin A2, the drive link 3 and
Aperture valve block 1 is hinged by axis pin B5, and drive link 3 is hinged with outer ring fixed ring 4 also by axis pin B5.
In the present embodiment, including diesel engine 9, the air throttle that detection 9 throttle opening of diesel engine is provided on diesel engine 9 is opened
It spends sensor 18 and detects the speed probe 19 of 9 rotating speed of diesel engine, 9 front end of the diesel engine is provided with air inlet main road, air inlet
Compressor 16 is provided on main road, 16 front end of compressor is provided with gas concentration lwevel sensors A 17, the setting of 9 rear end of diesel engine
There is exhaust main road, is vented the turbine 10 being provided on main road with 16 coaxial linkage of compressor.
In the present embodiment, the exhaust for being connected to air inlet main road and being vented main road is provided between air inlet main road and exhaust main road
Branch is set to along gas circulating direction exhaust branch inlet end on the exhaust main road of 10 front end of turbine, exhaust branch outlet side
It is set on the air inlet main road of 16 rear end of compressor.
In the present embodiment, on exhaust branch, it is disposed with to cool down to exhaust gas along gas circulating direction
Exhaust gas charge air cooler 11 and to control the aperture-type EGR valve 13 of exhaust branch gas flow, exhaust gas charge air cooler 11 and aperture-type EGR
Gas concentration lwevel sensor B12 is provided between valve 13,13 side of aperture-type EGR valve is provided with what driving drive rod 6 rotated
Stepper motor 14, is provided with transmission mechanism 8 between the stepper motor 14 and drive rod 6,14 side of stepper motor is provided with ECU
Controller 15.
In the present embodiment, the engine load sensor 18, speed probe 19, gas concentration lwevel sensors A 17,
Gas concentration lwevel sensor B12 and stepper motor 14 are electrically connected with ECU controllers 15.
A kind of working method of the control system based on aperture-type EGR valve, including the control based on aperture-type EGR valve
System processed, it is characterised in that：
（1）When diesel engine 9 is in speed operation operation, at this time engine load sensor 18 detect the aperture of air throttle compared with
Small, speed probe 19 detects that the rotating speed of diesel engine 9 is smaller, and transmits a signal to ECU controllers 15, ECU controllers 15
Judge that diesel engine 9 is in speed operation operation, the distributive value of diesel engine 9 is smaller at this time, and ignition temperature is relatively low, NOXProduction quantity
It is less, in order to ensure the normal operation of diesel engine 9, diesel engine 9 is enable to have sufficient oxygen air inflow, ECU controllers 15 to control
Stepper motor 14 processed inverts, and drives drive rod 6 to rotate counterclockwise by transmission mechanism 8, outer ring fixed ring 4 is driven to rotate counterclockwise
Certain angle makes aperture valve block 1 close inner ring fixed ring 7 by drive link 3, and at this moment aperture-type EGR valve 13, which is in, closes shape
State makes the exhaust branch residing for aperture-type EGR valve 13 close, diesel engine 9 generate exhaust gas by turbine 10 from exhaust main road
Outlet side is discharged, while turbine 10 being driven to improve rotating speed, drives compressor 16 to accelerate rotation, oxygen is sent into diesel engine 9；
（2）When diesel engine 9 is in medium-heavy duty operation, at this time engine load sensor 18 detect the aperture of air throttle compared with
Greatly, speed probe 19 detects that the rotating speed of diesel engine 9 is larger, and transmits a signal to ECU controllers 15, ECU controllers 15
Judge that diesel engine 9 is now in medium-heavy duty operation, the in-cylinder combustion of diesel engine 9 is more violent at this time, the NO of generationXAmount is relatively
Height, reaching to reduce by 9 in-cylinder combustion temperature of diesel engine reduces NOXDischarge capacity, at this time ECU controllers 15 control stepping electricity
Machine 14 rotates forward, and drives drive rod 6 to rotate clockwise by transmission mechanism 8, outer ring fixed ring 4 is driven to rotate clockwise certain angle
Degree, by drive link 3, makes aperture valve block 1 not closed to inner ring fixed ring 7, forms certain aperture, at this time aperture-type EGR
Valve 13 is opened, and the front and back connection of the exhaust branch residing for aperture-type EGR valve 13, a part of exhaust gas being vented on main road is made to pass through exhaust
Branch is simultaneously cooled down by exhaust gas charge air cooler 11 into air inlet main road, is reentered diesel engine 9 and is burnt, reaches drop
The effect of 9 inside cylinder ignition temperature of low diesel engine, and then reduce NOXContent, when the carbon dioxide on exhaust branch is dense
What the gas concentration lwevel signal that degree sensor B12 is detected was detected with the gas concentration lwevel sensors A 17 on air inlet main road
Gas concentration lwevel signal passes to ECU, and ECU calculates current EGR rate and the Optimum EGR rate ratio in diesel engine MAP chart accordingly
Compared with, if current EGR rate is higher than Optimum EGR rate, illustrate that exhaust gas recirculation amount is excessive in 9 cylinder of diesel engine, burns insufficient, ECU controls
Device 15 processed controls stepping motor 14 and inverts certain angle, reduces by 13 aperture of aperture-type EGR valve, exhaust gas recirculation amount is reduced, if working as
Preceding EGR rate is less than Optimum EGR rate, illustrates that 9 gas in-cylinder combustion of diesel engine is violent, temperature is excessively high, and the control of ECU controllers 15 at this time is not
Stepper motor 14 rotates forward certain angle, increases 13 aperture of aperture-type EGR valve so that current EGR rate maintains at optimum value；
（3）When diesel engine 9 is in high operating mode or oepration at full load, engine load sensor 18 detects air throttle at this time
Aperture is big, and speed probe 19 detects that the rotating speed of diesel engine 9 is big, and transmits a signal to ECU controllers 15, ECU controllers
15 judge that diesel engine 9 is now in high operating mode or oepration at full load, and the burning of diesel engine 9 is very violent at this time, NOXDischarge reach
Maximum value has been arrived, a large amount of NO is avoidedXIt is discharged into air, pollutes the environment, ECU controllers 15 control aperture-type
13 aperture of EGR valve reaches maximum, makes most NOXCooled down by exhaust branch and by exhaust gas charge air cooler 11
It into air inlet main road, reenters diesel engine 9 and burns, achieve the effect that reduce by 9 inside cylinder ignition temperature of diesel engine, in turn
Reduce NOXContent, when the concentration signal that the gas concentration lwevel sensor B12 on exhaust branch is detected and air inlet master
The concentration signal that the gas concentration lwevel sensors A 17 of road detects passes to ECU, and ECU calculates current EGR rate and bavin accordingly
Optimum EGR rate in oil machine MAP chart compares, if current EGR rate is higher than Optimum EGR rate, illustrates exhaust gas recirculation in 9 cylinder of diesel engine
Amount is excessive, and burning is insufficient, and ECU controllers 15 control stepping motor 14 and invert certain angle, reduces aperture-type EGR valve 13 and opens
Degree reduces exhaust gas recirculation amount, if current EGR rate is less than Optimum EGR rate, illustrate 9 gas in-cylinder combustion of diesel engine acutely, temperature mistake
Height, stepper motor 14 does not rotate forward certain angle for the control of ECU controllers 15 at this time, increases 13 aperture of aperture-type EGR valve so that current
EGR rate maintains at optimum value.
Aforesaid operations flow and software and hardware configuration are only used as presently preferred embodiments of the present invention, are not intended to limit the present invention
The scope of the claims, it is every using equivalents made by description of the invention and accompanying drawing content, be applied directly or indirectly in phase
Technical field is closed, is included within the scope of the present invention.
Claims (7)
1. a kind of control system based on aperture-type EGR valve, it is characterised in that：Including aperture-type EGR valve, the aperture-type EGR
Valve includes inner ring fixed ring, if the aperture valve of closing inner ring fixed ring can be coordinated by being hingedly provided with dry plate in the inner ring fixed ring
Piece, aperture valve block periphery are provided with outer ring fixed ring, and being provided on the fixed ring periphery wall of outer ring can drive outer ring fixed ring in
The drive rod of central axis, aperture valve on piece are provided with the drive link that aperture valve block can be driven to rotate, drive link one end hinge
It is connected on aperture valve on piece, the other end is hinged in the fixed ring of outer ring.
2. the control system according to claim 1 based on aperture-type EGR valve, it is characterised in that：The inner ring fixed ring
It is hinged by axis pin A with aperture valve block, the drive link is hinged by axis pin B with aperture valve block, and drive link is solid with outer ring
Determine ring to be hinged also by axis pin B.
3. the control system according to claim 1 based on aperture-type EGR valve, it is characterised in that：Including diesel engine, diesel oil
The speed probe of the engine load sensor and detection diesel engine speed of detection restrictor of diesel engine aperture is provided on machine,
The diesel engine front end is provided with air inlet main road, and compressor is provided on air inlet main road, and compressor front end is provided with carbon dioxide
Concentration sensor A, diesel engine rear end are provided with exhaust main road, are vented the turbine being provided on main road with compressor coaxial linkage.
4. the control system according to claim 3 based on aperture-type EGR valve, it is characterised in that：In air inlet main road and row
It is provided with connection air inlet main road between gas main road and is vented the exhaust branch of main road, along gas circulating direction exhaust branch inlet end
It is set on the exhaust main road of turbine front end, exhaust branch outlet side is set on the air inlet main road of compressor rear end.
5. the control system according to claim 4 based on aperture-type EGR valve, it is characterised in that：On exhaust branch, edge
Gas circulating direction is disposed with exhaust gas charge air cooler to cool down to exhaust gas and to control exhaust branch gas stream
The aperture-type EGR valve of amount is provided with gas concentration lwevel sensor B, aperture-type between exhaust gas charge air cooler and aperture-type EGR valve
EGR valve side is provided with the stepper motor of driving drive rod rotation, and driver is provided between the stepper motor and drive rod
Structure, stepper motor side are provided with ECU controllers.
6. the control system according to claim 5 based on aperture-type EGR valve, it is characterised in that：The throttle opening
Sensor, speed probe, gas concentration lwevel sensors A, gas concentration lwevel sensor B and stepper motor are controlled with ECU
Device electrical connection processed.
7. a kind of working method of the control system based on aperture-type EGR valve, including it is based on aperture-type as described in claim 1
The control system of EGR valve, it is characterised in that：
（1）When diesel engine is in speed operation operation, engine load sensor detects that the aperture of air throttle is smaller at this time,
Speed probe detects that the rotating speed of diesel engine is smaller, and transmits a signal to ECU controllers, and ECU controllers judge diesel engine
It is run in speed operation, the distributive value of diesel engine is smaller at this time, and ignition temperature is relatively low, NOXProduction quantity is less, in order to protect
The normal operation for demonstrate,proving diesel engine enables diesel engine to have sufficient oxygen air inflow, ECU controllers to control stepper motor reversion,
It drives drive rod to rotate counterclockwise by transmission mechanism, outer ring fixed ring is driven to rotate counterclockwise certain angle, by drive link,
Make aperture valve block that inner ring is fixed ring seal, at this moment aperture-type EGR valve is closed, and makes the row residing for aperture-type EGR valve
Gas branch is closed, and the exhaust gas that diesel engine generates is discharged by turbine from exhaust main road outlet side, while being driven turbine to improve and being turned
Speed drives compressor to accelerate rotation, oxygen is sent into diesel engine；
（2）When diesel engine is in medium-heavy duty operation, engine load sensor detects that the aperture of air throttle is larger at this time,
Speed probe detects that the rotating speed of diesel engine is larger, and transmits a signal to ECU controllers, and ECU controllers judge diesel engine
It is now in medium-heavy duty operation, the in-cylinder combustion of diesel engine is more violent at this time, the NO of generationXMeasure it is relatively high, in order to reduce
Diesel engine in-cylinder combustion temperature and reach reduce NOXDischarge capacity, at this time ECU controllers control stepper motor rotate forward, pass through biography
Motivation structure driving drive rod rotates clockwise, and drives outer ring fixed ring to rotate clockwise certain angle, by drive link, makes aperture
Valve block is not closed inner ring fixed ring, and certain aperture is formed, and aperture-type EGR valve is opened at this time, is made residing for aperture-type EGR valve
The front and back connection of exhaust branch, a part of exhaust gas being vented on main road cooled down by exhaust branch and by exhaust gas charge air cooler
Cooling enters air inlet main road, reenters diesel engine and burns, and achievees the effect that reduce diesel engine inside cylinder ignition temperature, into
And reduce NOXContent, when the gas concentration lwevel signal that the gas concentration lwevel sensor B on exhaust branch is detected
ECU is passed to the gas concentration lwevel signal of the gas concentration lwevel sensors A detection on air inlet main road, ECU is calculated accordingly
Go out current EGR rate compared with the Optimum EGR rate in diesel engine MAP chart, if current EGR rate is higher than Optimum EGR rate, illustrates diesel engine
Exhaust gas recirculation amount is excessive in cylinder, and burning is insufficient, and ECU controllers control stepping motor and invert certain angle, reduces aperture
Formula EGR valve aperture reduces exhaust gas recirculation amount, if current EGR rate is less than Optimum EGR rate, illustrates that burning is acute in cylinder of diesel engine
It is strong, temperature is excessively high, at this time ECU controllers control not stepper motor rotate forward certain angle, increase aperture-type EGR valve aperture so that when
Preceding EGR rate maintains at optimum value；
（3）When diesel engine is in high operating mode or oepration at full load, engine load sensor detects opening for air throttle at this time
Degree is big, and speed probe detects that the rotating speed of diesel engine is big, and transmits a signal to ECU controllers, and ECU controllers judge diesel oil
Machine is now in high operating mode or oepration at full load, and the burning of diesel engine is very violent at this time, NOXDischarge reached maximum value,
Avoid a large amount of NOXIt is discharged into air, pollutes the environment, ECU controllers control aperture-type EGR valve aperture reaches most
Greatly, make most NOXCooled down into air inlet main road by exhaust branch and by exhaust gas charge air cooler, again into
Enter diesel engine to burn, achievees the effect that reduce diesel engine inside cylinder ignition temperature, and then reduce NOXContent, when mounted on
The concentration signal that gas concentration lwevel sensor B on exhaust branch is detected is sensed with the gas concentration lwevel on air inlet main road
The concentration signal of device A detections passes to ECU, and ECU calculates current EGR rate and the Optimum EGR rate ratio in diesel engine MAP chart accordingly
Compared with, if current EGR rate is higher than Optimum EGR rate, illustrate that exhaust gas recirculation amount is excessive in cylinder of diesel engine, burns insufficient, ECU controls
Device controls stepping motor and inverts certain angle, reduces aperture-type EGR valve aperture, exhaust gas recirculation amount is reduced, if current EGR rate
Less than Optimum EGR rate, illustrate that burning is violent in cylinder of diesel engine, temperature is excessively high, stepper motor does not rotate forward for ECU controllers control at this time
Certain angle increases aperture-type EGR valve aperture so that current EGR rate maintains at optimum value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810681299.XA CN108590895A (en) | 2018-06-27 | 2018-06-27 | A kind of control system and its working method based on aperture-type EGR valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810681299.XA CN108590895A (en) | 2018-06-27 | 2018-06-27 | A kind of control system and its working method based on aperture-type EGR valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108590895A true CN108590895A (en) | 2018-09-28 |
Family
ID=63634244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810681299.XA Pending CN108590895A (en) | 2018-06-27 | 2018-06-27 | A kind of control system and its working method based on aperture-type EGR valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108590895A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664342A (en) * | 2005-03-18 | 2005-09-07 | 上海绍博车辆动力装置科技有限公司 | Engine electric control EGR system for vehicle |
| DE102010063451A1 (en) * | 2010-12-17 | 2012-06-21 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Venetian blind device e.g. diaphragm, for use in shutter-and fan assembly of vehicle i.e. motor car, has slats arranged over circumference of adjusting ring and partially overlapped with each other and connected with arm element |
| US8316820B1 (en) * | 2010-11-05 | 2012-11-27 | Edward Cammarata | Throttle providing unobstructed air flow path when fully open and vortex generating configuration when partly open |
| CN203285551U (en) * | 2013-06-19 | 2013-11-13 | 吉林大学 | Compression ignition engine homogeneous combustion control system for quantitatively controlling combustion temperature in cylinder |
| CN207080675U (en) * | 2017-06-30 | 2018-03-09 | 北京诚益通科技有限公司 | A kind of servo aperture valve of powder racking machine |
| CN107905920A (en) * | 2017-09-30 | 2018-04-13 | 天津大学 | A kind of apparatus and method that supercharged diesel engine discharge is reduced based on air inlet Composition Control |
| CN208474018U (en) * | 2018-06-27 | 2019-02-05 | 福州大学 | A kind of control system based on aperture-type EGR valve |
-
2018
- 2018-06-27 CN CN201810681299.XA patent/CN108590895A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664342A (en) * | 2005-03-18 | 2005-09-07 | 上海绍博车辆动力装置科技有限公司 | Engine electric control EGR system for vehicle |
| US8316820B1 (en) * | 2010-11-05 | 2012-11-27 | Edward Cammarata | Throttle providing unobstructed air flow path when fully open and vortex generating configuration when partly open |
| DE102010063451A1 (en) * | 2010-12-17 | 2012-06-21 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Venetian blind device e.g. diaphragm, for use in shutter-and fan assembly of vehicle i.e. motor car, has slats arranged over circumference of adjusting ring and partially overlapped with each other and connected with arm element |
| CN203285551U (en) * | 2013-06-19 | 2013-11-13 | 吉林大学 | Compression ignition engine homogeneous combustion control system for quantitatively controlling combustion temperature in cylinder |
| CN207080675U (en) * | 2017-06-30 | 2018-03-09 | 北京诚益通科技有限公司 | A kind of servo aperture valve of powder racking machine |
| CN107905920A (en) * | 2017-09-30 | 2018-04-13 | 天津大学 | A kind of apparatus and method that supercharged diesel engine discharge is reduced based on air inlet Composition Control |
| CN208474018U (en) * | 2018-06-27 | 2019-02-05 | 福州大学 | A kind of control system based on aperture-type EGR valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103221661B (en) | Device for detecting abnormality of air-fuel ratio dispersion among cylinders | |
| US9599050B2 (en) | Limp-home method for safeguarding the catalyst of an internal combustion engine in case of a defective controlled grille shutter and vehicle thereof | |
| SE520920C2 (en) | Control device for cylinder-injected spark plug internal combustion engine | |
| US10704519B2 (en) | Control device of hybrid vehicle | |
| KR20210061843A (en) | Apparatus for diagnozing egr valve and method using the same | |
| JP4277933B1 (en) | INTERNAL COMBUSTION ENGINE DEVICE, ITS CONTROL METHOD, AND VEHICLE | |
| CN103967626A (en) | Variable cylinder engine | |
| JP2008196376A (en) | Vehicle and its control method | |
| CN208474018U (en) | A kind of control system based on aperture-type EGR valve | |
| JP5141219B2 (en) | Control device for internal combustion engine | |
| BR112020004080A2 (en) | control method and control device for internal combustion engine | |
| CN108590895A (en) | A kind of control system and its working method based on aperture-type EGR valve | |
| WO2020095536A1 (en) | Internal combustion engine control device | |
| JP6980490B2 (en) | Engine system diagnostic methods and equipment | |
| WO2017009962A1 (en) | Internal combustion engine control device | |
| JP2010179805A (en) | Hybrid vehicle | |
| WO2014087809A1 (en) | Abnormality diagnosis method and abnormality diagnosis device for egr device | |
| WO2010067427A1 (en) | Control apparatus of internal combustion engine | |
| JP4222365B2 (en) | Internal combustion engine device and control method thereof | |
| JP5569374B2 (en) | Internal combustion engine device and automobile | |
| JP6264746B2 (en) | Control device and control method for internal combustion engine | |
| BR102016009564A2 (en) | ? control system for internal combustion engines? | |
| JP6505073B2 (en) | Control device for internal combustion engine | |
| WO2019106740A1 (en) | Control method and control device for vehicular internal combustion engine | |
| CN108757195A (en) | The EGR rate control device and its control method that can be changed Venturi tube are driven based on worm and gear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |