CN108798930A - A kind of engine control system and automobile - Google Patents
A kind of engine control system and automobile Download PDFInfo
- Publication number
- CN108798930A CN108798930A CN201710313462.2A CN201710313462A CN108798930A CN 108798930 A CN108798930 A CN 108798930A CN 201710313462 A CN201710313462 A CN 201710313462A CN 108798930 A CN108798930 A CN 108798930A
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- Prior art keywords
- engine
- supercharger
- connect
- gas recirculation
- exhaust gas
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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
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
-
- 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]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
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- 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
- F02M23/00—Apparatus for adding secondary air to fuel-air mixture
-
- 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
- F02M23/00—Apparatus for adding secondary air to fuel-air mixture
- F02M23/04—Apparatus for adding secondary air to fuel-air mixture with automatic control
-
- 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
- F02D2200/1002—Output torque
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Exhaust Gas After Treatment (AREA)
- Supercharger (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
A kind of engine control system of present invention offer and automobile, the engine control system include：Engine with supercharger；The gas recirculation system being connect with engine with supercharger；The secondary air injection system being connect with engine with supercharger；The electronic control unit being electrically connected respectively with the air injection valve in the exhaust gas recirculation valve and secondary air injection system in gas recirculation system；Wherein, electronic control unit controls the open and-shut mode of exhaust gas recirculation valve and air injection valve according to the rotating speed and load of engine with supercharger.The invention on engine with supercharger by being arranged gas recirculation system and secondary air injection system connected to it, by electronic control unit according to the rotating speed and load of engine with supercharger, control the open and-shut mode of exhaust gas recirculation valve and air injection valve, to give full play to the advantage of EGR technology, fuel consumption rate is reduced, realizes fuel-economy performance, power performance and the emission performance for taking into account engine with supercharger within the scope of full load.
Description
Technical field
The present invention relates to technical field of engines, more particularly to a kind of engine control system and automobile.
Background technology
In recent years, with the getting worse of atmosphere pollution, the fuel consumption and emission performance of motor vehicle is by increasingly
Harsh limitation.New-energy automobile is by all various limitations such as production cost, continual mileage and drive safety, it is difficult to
Use is promoted in short time, it is reality, and effective mode the most to carry out technology upgrading for existing conventional fuel oil,
Especially EGR (Exhaust Gas Recirculation, exhaust gas recycling) technology, can be effectively improved the fuel oil of gasoline engine
Consumption level and emission performance, are increasingly subject to extensive concern.
The principle that EGR technology improves engine performance is, using the higher feature of EGR gas specific heat, reduces in cylinder
The ignition temperature of gaseous mixture, so as to improve the NO of middle and high load conditionxEmission level, alleviation are often adopted because of excessive discharge temperature
Enriching strategy.However, existing EGR technology, under start operating performance, idling operation and external characteristics operating mode, the fuel oil of engine passes through
Ji property and emission performance are poor；And there is also have the case where energy dissipation under middle and high load condition.
Invention content
The purpose of the present invention is to provide a kind of engine control system and automobiles, so as to solve existing EGR technology
Under start operating performance, idling operation and external characteristics operating mode, the fuel consumption and emission poor performance of engine；And middle and high load
There are problems that energy dissipation under operating mode.
To achieve the goals above, the embodiment of the present invention provides a kind of engine control system, including：
Engine with supercharger；
The gas recirculation system being connect with the engine with supercharger；
The secondary air injection system being connect with the engine with supercharger；
Respectively with two in the exhaust gas recirculation valve and the secondary air injection system in the gas recirculation system
The electronic control unit of secondary air injection valve electrical connection；
Wherein, the electronic control unit controls the exhaust gas and follows again according to the rotating speed and load of the engine with supercharger
The open and-shut mode of ring valve and the air injection valve.
Wherein, the engine with supercharger includes：
Engine body；
The first air inlet pipeline being connect with the engine body is equipped with air throttle in first air inlet pipeline；
The charge air cooler being connect with first air inlet pipeline；
The second air inlet pipeline being connect with the charge air cooler；
The third air inlet pipeline being connected to second air inlet pipeline；
The first exhaust pipeline being connect with the engine body；
The second exhaust pipeline being connected to the first exhaust pipeline；
The ternary catalyzing unit being connect with the second exhaust pipeline；
The third gas exhaust piping being connect with the ternary catalyzing unit；
And it is set to the booster between second air inlet pipeline and the first exhaust pipeline.
Wherein, the gas recirculation system includes：
The first exhaust gas recirculation circuit being connected to the second exhaust pipeline；
The cooler for recycled exhaust gas being connect with first exhaust gas recirculation circuit；
The second exhaust gas recirculation circuit being connect with the cooler for recycled exhaust gas；
The mixing chamber being connect with second exhaust gas recirculation circuit.
Wherein, the exhaust gas recirculation valve is set in second exhaust gas recirculation circuit.
Wherein, the mixing chamber is installed on the third air inlet pipeline.
Wherein, the secondary air injection system includes：
The secondary air injection tube being connect with the exhaust manifold of the engine with supercharger, the air injection valve are set to
In the secondary air injection tube；
The secondary air pump being connect with the secondary air injection tube；
The connecting line being connect with the secondary air pump, the connecting line are connected to the third air inlet pipeline；
Wherein, the electronic control unit is specifically used for default in rotating speed and the load satisfaction first of the engine with supercharger
When condition, controls the exhaust gas recirculation valve and be closed, and the air injection valve is opened；
When the rotating speed and load of the engine with supercharger meet the second preset condition, controls the exhaust gas recirculation valve and beat
It opens, and the air injection valve is closed；
When the rotating speed and load of the engine with supercharger meet in third preset condition, the exhaust gas recycling is controlled
Valve is opened, and the air injection valve is opened.
Wherein, the secondary air injection tube have branch pipe portion identical with the exhaust manifold quantity and with the branch pipe
Total injection pipe portion of portion's connection；
Wherein, the branch pipe portion is connect with the exhaust manifold；
Total injection pipe portion is connect with the secondary air pump；
The air injection valve is set in total injection pipe portion.
Wherein, the load of the engine with supercharger is the output torque of the engine with supercharger.
Wherein, further include：
The air cleaner being set at the inlet end of the third air inlet pipeline；And
Between the air cleaner and the mixing chamber, and the air inlet being set in the third air inlet pipeline is mixed
Close valve.
The present invention also provides a kind of automobiles, including：Engine control system as described above.
The above-mentioned technical proposal of the present invention has the beneficial effect that：
In the said program of the embodiment of the present invention, followed again by the way that exhaust gas connected to it respectively is arranged on engine with supercharger
Loop system and secondary air injection system, and by exhaust gas recirculation valve and air injection valve with electronic control unit electricity
Connection controls exhaust gas recirculation valve and air injection reaction by electronic control unit according to the rotating speed and load of engine with supercharger
The open and-shut mode of valve reduces fuel consumption rate to give full play to the advantage of EGR technology, improves supercharging gasoline engine and starts and idle
The emission performance of fast operating mode and external characteristics operating mode is realized and takes into account the fuel-economy performance of engine with supercharger within the scope of full load, moves
Power performance and emission performance.
Description of the drawings
Fig. 1 is one of the work flow diagram of engine control system of the embodiment of the present invention；
Fig. 2 is the engine control system different rotating speeds and the corresponding operating mode schematic diagram of load of the embodiment of the present invention.
Fig. 3 is the two of the work flow diagram of the engine control system of the embodiment of the present invention；
Fig. 4 is the three of the work flow diagram of the engine control system of the embodiment of the present invention.
Reference sign：
1- engines with supercharger；2- exhaust gas recirculation valve；3- air injection valves；4- engine bodies；The first air inlets of 5-
Pipeline；6- air throttles；7- charge air coolers；The second air inlet pipelines of 8-；9- third air inlet pipelines；10- first exhaust pipelines；11- second
Gas exhaust piping；12- ternary catalyzing units；13- third gas exhaust pipings；14- boosters；The first exhaust gas recirculation circuits of 15-；16- is useless
Gas recycle cooler；The second exhaust gas recirculation circuits of 17-；18- mixing chambers；19- secondary air injection tubes；20- auxiliary airs
Pump；21- connecting lines；22- branch pipe portions；23- always sprays pipe portion；24- air cleaners；25- air inlet mixing valves；26- compressors；
27- turbines.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
As shown in Figure 1, the embodiment of the present invention provides a kind of engine control system, including：Engine with supercharger 1；With supercharging
The gas recirculation system that engine 1 connects；The secondary air injection system being connect with engine with supercharger 1；Respectively again with exhaust gas
The electronics control that air injection valve 3 in exhaust gas recirculation valve 2 and secondary air injection system in the circulatory system is electrically connected
Unit (not shown) processed；Wherein, electronic control unit controls exhaust gas and follows again according to the rotating speed and load of engine with supercharger 1
The open and-shut mode of ring valve 2 and air injection valve 3.
It should be noted that gas recirculation system, that is, egr system, the portion for engine to be discharged be transmitted back into
Gas manifold, and cylinder is again introduced into together with incoming mixture.Due to containing a large amount of CO in exhaust gas2Equal polyatomic gas, and
CO2Equal gases cannot burn and but absorb a large amount of heat since its specific heat capacity is high, make the maximum combustion temperature of gaseous mixture in cylinder
It reduces, to reduce NOxProduction quantity.
Here, the exhaust gas that the exhaust gas recirculation valve 2 in gas recirculation system is used to engine combustion being discharged, guiding is extremely
Inlet manifold participates in burning.
Here, secondary air injection system is used to fresh air being sent into enmgine exhaust, to make exhaust
Hydrocarbon and carbon monoxide further oxidation and burning, reduce the discharge capacity of the hydrocarbon and carbon monoxide in exhaust.
Electronic control unit (ECU, Electronic Control Unit), also known as " car running computer ", " vehicle-mounted computer "
Deng.
Specifically, electronic control unit can obtain the rotating speed of engine with supercharger 1 by engine speed sensor；Pass through section
Valve position sensor and air flow meter obtain the load condition of engine with supercharger 1.Electronic control unit is sent out according to supercharging
The rotating speed and load of motivation control the open and-shut mode of exhaust gas recirculation valve 2 and air injection valve 3, to give full play to EGR
The advantage of technology realizes fuel-economy performance, power performance and the emission performance that engine with supercharger is taken into account within the scope of full load.
As shown in Figure 1, engine with supercharger 1 includes in the embodiment of the present invention：Engine body 4；It is connect with engine body 4
The first air inlet pipeline 5, air throttle 6 is equipped in the first air inlet pipeline 5；The charge air cooler 7 being connect with the first air inlet pipeline 5；With in
The second air inlet pipeline 8 that cooler 7 connects；The third air inlet pipeline 9 being connected to the second air inlet pipeline 8；It is connect with engine body 4
First exhaust pipeline 10；The second exhaust pipeline 11 being connected to first exhaust pipeline 10；It is connect with second exhaust pipeline 11
Ternary catalyzing unit 12；The third gas exhaust piping 13 being connect with ternary catalyzing unit 12；And it is set to the second air inlet pipeline 8 and first
Booster 14 between gas exhaust piping 10.
Here, one end of the first air inlet pipeline 5 is connect with engine body 4, and the other end is connect with charge air cooler 7；Second into
One end of air pipe 8 is connect with charge air cooler 7, and the other end is connect with third air inlet pipeline 9；First air inlet pipeline 5 and the second air inlet
Pipeline 8 is connected to, i.e. the second air inlet pipeline 8 is connected to by charge air cooler 7 with the second air inlet pipeline 8.
In addition, one end of first exhaust pipeline 10 is connect with engine body 4, the other end connects with second exhaust pipeline 11
It connects, first exhaust pipeline 10 is connected to second exhaust pipeline 11；One end of second exhaust pipeline 11 connects with first exhaust pipeline 10
It connects, the other end is connect with ternary catalyzing unit 12；One end of third gas exhaust piping 13 is connect with ternary catalyzing unit 12, and the other end leads to
External environment, third gas exhaust piping 13 are connected to second exhaust pipeline 11, i.e., third gas exhaust piping 13 passes through ternary catalyzing unit 12
It is connected to second exhaust pipeline 11.
It should be noted that it is preferred, as shown in Figure 1, booster 14 is turbocharger, wherein turbocharger packet
It includes：Compressor 26 and turbine 27.Here, compressor 26 is located in the second air inlet pipeline 8, and turbine 27 is located at first exhaust pipeline 10
It is interior.
Specifically, as shown in Figure 1, gas recirculation system includes：The first exhaust gas being connected to second exhaust pipeline 11 follows
Endless tube road 15；The cooler for recycled exhaust gas 16 being connect with the first exhaust gas recirculation circuit 15；With cooler for recycled exhaust gas 16
Second exhaust gas recirculation circuit 17 of connection；The mixing chamber 18 being connect with the second exhaust gas recirculation circuit 17.
Here, exhaust gas recirculation valve 2 is set in the second exhaust gas recirculation circuit 17；Mixing chamber 18 is installed on third air inlet
Pipeline 9.
Specifically, one end of the first exhaust gas recirculation circuit 15 is connected to second exhaust pipeline 11, the other end and exhaust gas are again
Recirculation cooler 16；One end of second exhaust gas recirculation circuit 17 is connect with cooler for recycled exhaust gas 16, the other end with mix
Chamber 18 connects.
It should be noted that one end of the first exhaust gas recirculation circuit 15 is connected to second exhaust pipeline 11, i.e., ternary is urged
There is 15 Liang Ge branches of second exhaust pipeline 11 and the first exhaust gas recirculation circuit before changing device 12.It is, the present invention is implemented
The scheme for exhaust gas circulation system of example takes gas mode using upstream, makes full use of the unburned hydrocarbons contained in exhaust and an oxidation
Carbon etc. is inflammable and combustible improves mixture combustion process, improves Fuel Economy.
As shown in Figure 1, the secondary air injection system in the embodiment of the present invention includes：With the exhaust discrimination of engine with supercharger 1
The secondary air injection tube 19 of pipe (not shown) connection, air injection valve 3 are set in secondary air injection tube 19；With
The secondary air pump 20 that secondary air injection tube 19 connects；The connecting line 21 being connect with secondary air pump 20, connecting line 21
It is connected to third air inlet pipeline 9.
Specifically, secondary air injection tube 19 has branch pipe portion 22 identical with exhaust manifold quantity and connects with branch pipe portion 22
Logical total injection pipe portion 23；Wherein, branch pipe portion 22 is connect with exhaust manifold.
Wherein, electronic control unit is specifically used for when the rotating speed and load of engine with supercharger 1 meet the first preset condition,
It controls exhaust gas recirculation valve 2 to be closed, and air injection valve 3 is opened；
When the rotating speed and load of engine with supercharger 1 meet the second preset condition, controls the exhaust gas recirculation valve 2 and beat
It opens, and air injection valve 3 is closed；
When the rotating speed and load of engine with supercharger 1 meet in third preset condition, control exhaust gas recirculation valve 2 is beaten
It opens, and air injection valve 3 is opened.
It should be noted that preferred, the load of engine with supercharger 1 is the defeated of engine with supercharger 1 in the embodiment of the present invention
Go out torque T.
Here, as shown in Fig. 2, showing for engine control system of embodiment of the present invention different rotating speeds and the corresponding operating mode of load
It is intended to.Wherein, abscissa indicates the rotating speed n of engine with supercharger；Ordinate indicates the output torque T of engine with supercharger.
First preset condition refers specifically to region of the engine with supercharger 1 in startup and idling operation, specific such as Fig. 2 1. portion
Point, i.e., 0<n<n1, and 0<T<T1, n1Indicate the first preset rotation speed, T1Indicate the first predetermined torque；
Second preset condition refers specifically to engine with supercharger 1 and is in moderate duty to the non-enriching operating mode of high load capacity, specific such as Fig. 2
In region 2. part；The output torque of the rotating speed of engine and/or engine is to should be greater than startup and idling work under the operating mode
The output torque of the rotating speed of engine and/or engine under condition.
Third preset condition refers specifically to engine with supercharger 1 and is in big load enriching operating mode, the specific region as in Fig. 2 3. portion
Point；The output torque of engine is largely both greater than the engine under moderate duty to the non-enriching operating mode of high load capacity under the operating mode
Output torque.
Here, region 1., region 2. and region 3. non-overlapping copies.
Specifically, the engine control system of the embodiment of the present invention further includes：Be set to the third air inlet pipeline 9 into
Air cleaner 24 at gas end；And between air cleaner 24 and mixing chamber 18, and it is set to third air inlet pipeline 9
Interior air inlet mixing valve 25.
The work work of the engine control system of the embodiment of the present invention is illustrated with regard to Fig. 1 and in conjunction with Fig. 3 and Fig. 4 below
Journey.
As shown in Figure 1, electronic control unit meets the first preset condition in the rotating speed and load of engine with supercharger 1, that is, increase
When hydraulic motor 1 is in startup and idling operation, control exhaust gas recirculation valve 2 is closed, and air injection valve 3 is opened；
Here, when engine with supercharger is in startup and idling operation, to ensure that engine reliable starts, enriching is often taken
Strategy, since working medium is relatively fewer in cylinder, engine with supercharger combustion stability is poor, therefore can not be improved using EGR technology
Engine with supercharger starts and the fuel-economy performance and emission performance of idling operation, so electronic control unit is in engine with supercharger
1 in when starting with idling operation, and control exhaust gas recirculation valve 2 is closed, and is controlled air injection valve 3 and opened.
Specific workflow is：Fresh air enters 20 entrance of secondary air pump by air cleaner 24, and process is secondary
3 entrance of air injection valve is reached after air pump 20, since air injection valve 3 is opened at this time, air passes through secondary sky
Gas jet pipe 19 enters in each cylinder exhaust manifold, is chemically reacted with unburned hydrocarbons, improves engine with supercharger row
Put performance.
It should be noted that when engine with supercharger 1 is under startup and idling operation, secondary air injection system is used only,
Air is sprayed into exhaust manifold, exothermic oxidation reaction is carried out with excess fuel, reduces the discharge of hydrocarbon and carbon monoxide, together
When promote 12 temperature of ternary catalyzing unit rapidly, realize good emission performance.
As shown in figure 3, electronic control unit meets the second preset condition in the rotating speed and load of engine with supercharger 1, that is, increase
When hydraulic motor 1 is in moderate duty non-to high load capacity enriching operating mode, control exhaust gas recirculation valve 2 is opened, and auxiliary air sprays
Penetrate the closure of valve 3；
Specific workflow is：Fresh air follows after air cleaner 24 and air inlet mixing valve 25 with by exhaust gas again
The low pressure exhaust gas of ring cooler 16 and exhaust gas recirculation valve 2 recycling gas is completed to mix in mixing chamber 18, and cold in passing through
After device 7 and air throttle 6, eventually enter into the cylinder of engine with supercharger.
Here, gas recirculation system takes gas mode using 12 upstream of ternary catalyzing unit, can make full use of and urge in front exhaust
The inflammable and combustible such as existing a small amount of unburned hydrocarbons and carbon monoxide improves mixture combustion process, avoids energy
Amount waste, improves Fuel Economy.
As shown in figure 4, electronic control unit meets third preset condition in the rotating speed and load of engine with supercharger 1, that is, increase
When hydraulic motor 1 is in big load enriching operating mode, control exhaust gas recirculation valve 2 is opened, and air injection valve 3 is opened；
Here, to improve the power performance of engine with supercharger, while delivery temperature is reduced, especially high load working condition is general
Use enriching strategy；Although EGR technology can reduce gas in-cylinder combustion temperature, EGR dosages are by maximum pressure boost and burning
Stability limitation cannot be excessively high, therefore when big load enriching operating mode, and engine with supercharger 1 can be made by only opening exhaust gas recirculation valve 2
Fuel consumption and emission reduced performance, so also needing to open air injection valve 3.
Detailed process workflow is：Engine with supercharger 1 exhaust manifold discharge exhaust gas after turbine 27 directly into
Enter cooler for recycled exhaust gas 16, by completing to mix in mixing chamber 18 with fresh air after exhaust gas recirculation valve 2, through overvoltage
Enter in cylinder after mechanism of qi 26, charge air cooler 7 and air throttle 6；In addition, since air injection valve 3 is opened, air passes through air
Filter 24, secondary air pump 20 and air injection valve 3 are ejected into each cylinder exhaust discrimination by secondary air injection tube 19
Guan Zhong.
Here, big load enriching operating mode, while using EGR technology, i.e. gas recirculation system and air injection reaction system
System.Use low pressure EGR technology that can significantly reduce gas in-cylinder combustion temperature, therefore enriching slump in demand, fuel-economy performance change
It is kind；Simultaneously because delivery temperature declines, to provide warming space using air injection reaction technology, therefore, adopted under the operating mode
With low pressure EGR technology match secondary air injection system, can improve simultaneously high load working condition engine fuel-economy performance and
Power performance.
It should be noted that electronic control unit can realize the switching of the three classes regime mode of engine with supercharger 1, pass through exhaust gas
Recycle valve 2, air injection valve 3 cooperating controlled, centre setting transitional region (region in such as Fig. 2 1.,
Region 2. and region 3. between intermediate zone, thick line portion in figure), prevent electrically operated valve frequent movement.Wherein, auxiliary air
Pump 20 has superpressure vent valve, and extra air can be discharged, and the operation and stopping of secondary air pump are by electronic control unit
It is adjusted according to the variation of the rotating speed of engine and load.
Engine control system provided in an embodiment of the present invention, electronic control unit is according to the rotating speed of engine and load
Variation determines of the exhaust gas recirculation valve of gas recirculation system and the air injection valve of auxiliary air recirculating system
With mode, i.e. startup and idling operation, secondary air injection system is used to improve emission performance；Moderate duty does not add to high load capacity
Dense operating mode takes the low pressure EGR mode of gas to improve Fuel Economy energy using catalyst converter upstream；Big load enriching operating mode is adopted
The emission performance for improving engine with gas recirculation system matching secondary air injection system, realizes and is taken into account within the scope of full load
Fuel-economy performance, power performance and the emission performance of engine with supercharger.
The embodiment of the present invention also provides a kind of automobile, including：Engine control system as described above.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of engine control system, which is characterized in that including：
Engine with supercharger (1)；
The gas recirculation system being connect with the engine with supercharger (1)；
The secondary air injection system being connect with the engine with supercharger (1)；
Respectively with it is secondary in the exhaust gas recirculation valve (2) and the secondary air injection system in the gas recirculation system
The electronic control unit of air injection valve (3) electrical connection；
Wherein, the electronic control unit controls the exhaust gas recycling according to the rotating speed and load of the engine with supercharger (1)
The open and-shut mode of valve (2) and the air injection valve (3).
2. engine control system according to claim 1, which is characterized in that the engine with supercharger (1) includes：
Engine body (4)；
The first air inlet pipeline (5) being connect with the engine body (4) is equipped with air throttle in first air inlet pipeline (5)
(6)；
The charge air cooler (7) being connect with first air inlet pipeline (5)；
The second air inlet pipeline (8) being connect with the charge air cooler (7)；
The third air inlet pipeline (9) being connected to second air inlet pipeline (8)；
The first exhaust pipeline (10) being connect with the engine body (4)；
The second exhaust pipeline (11) being connected to the first exhaust pipeline (10)；
The ternary catalyzing unit (12) being connect with the second exhaust pipeline (11)；
The third gas exhaust piping (13) being connect with the ternary catalyzing unit (12)；
And it is set to the booster (14) between second air inlet pipeline (8) and the first exhaust pipeline (10).
3. engine control system according to claim 2, which is characterized in that the gas recirculation system includes：
The first exhaust gas recirculation circuit (15) being connected to the second exhaust pipeline (11)；
The cooler for recycled exhaust gas (16) being connect with first exhaust gas recirculation circuit (15)；
The second exhaust gas recirculation circuit (17) being connect with the cooler for recycled exhaust gas (16)；
The mixing chamber (18) being connect with second exhaust gas recirculation circuit (17).
4. engine control system according to claim 3, which is characterized in that the exhaust gas recirculation valve (2) is set to
In second exhaust gas recirculation circuit (17).
5. engine control system according to claim 3, which is characterized in that the mixing chamber (18) is installed on described
Three air inlet pipelines (9).
6. engine control system according to claim 3, which is characterized in that the secondary air injection system includes：
The secondary air injection tube (19) being connect with the exhaust manifold of the engine with supercharger (1), the air injection valve
(3) it is set in the secondary air injection tube (19)；
The secondary air pump (20) being connect with the secondary air injection tube (19)；
The connecting line (21) being connect with the secondary air pump (20), the connecting line (21) and the third air inlet pipeline
(9) it is connected to；
Wherein, the electronic control unit is specifically used for default in rotating speed and the load satisfaction first of the engine with supercharger (1)
When condition, the exhaust gas recirculation valve (2) closure is controlled, and the air injection valve (3) is opened；
When the rotating speed and load of the engine with supercharger (1) meet the second preset condition, the exhaust gas recirculation valve (2) is controlled
It opens, and the air injection valve (3) is closed；
When the rotating speed and load of the engine with supercharger (1) meet in third preset condition, the exhaust gas recycling is controlled
Valve (2) is opened, and the air injection valve (3) is opened.
7. engine control system according to claim 6, which is characterized in that the secondary air injection tube (19) has
Branch pipe portion (22) identical with the exhaust manifold quantity and the total injection pipe portion (23) being connected to the branch pipe portion (22)；
Wherein, the branch pipe portion (22) connect with the exhaust manifold；
Total injection pipe portion (23) connect with the secondary air pump (20)；
The air injection valve (3) is set in total injection pipe portion (23).
8. engine control system according to claim 6, which is characterized in that the load of the engine with supercharger (1) is
The output torque of the engine with supercharger (1).
9. engine control system according to claim 3, which is characterized in that further include：
The air cleaner (24) being set at the inlet end of the third air inlet pipeline (9)；And
Between the air cleaner (24) and the mixing chamber (18), and it is set in the third air inlet pipeline (9)
Air inlet mixing valve (25).
10. a kind of automobile, which is characterized in that including：Such as claim 1~9 any one of them engine control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710313462.2A CN108798930B (en) | 2017-05-05 | 2017-05-05 | Engine control system and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710313462.2A CN108798930B (en) | 2017-05-05 | 2017-05-05 | Engine control system and automobile |
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| Publication Number | Publication Date |
|---|---|
| CN108798930A true CN108798930A (en) | 2018-11-13 |
| CN108798930B CN108798930B (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710313462.2A Active CN108798930B (en) | 2017-05-05 | 2017-05-05 | Engine control system and automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11703017B2 (en) | 2021-08-16 | 2023-07-18 | Ford Global Technologies, Llc | Methods and systems for reducing hydrocarbon emissions |
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| US20100139267A1 (en) * | 2007-01-27 | 2010-06-10 | Borgwarner Inc. | Secondary air system for a combustion engine breathing system |
| CN103352764A (en) * | 2012-08-01 | 2013-10-16 | 北京博曼迪汽车科技有限公司 | Engine electronic fuel injection control system based on torque control |
| US20160348615A1 (en) * | 2015-05-26 | 2016-12-01 | Tenneco Gmbh | Egr system with particle filter and wastegate |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2643000Y (en) * | 2003-06-13 | 2004-09-22 | 重庆力帆实业（集团）有限公司 | Secondary air and jetting and exhaust gas recirculation engine |
| US20100139267A1 (en) * | 2007-01-27 | 2010-06-10 | Borgwarner Inc. | Secondary air system for a combustion engine breathing system |
| CN103352764A (en) * | 2012-08-01 | 2013-10-16 | 北京博曼迪汽车科技有限公司 | Engine electronic fuel injection control system based on torque control |
| US20160348615A1 (en) * | 2015-05-26 | 2016-12-01 | Tenneco Gmbh | Egr system with particle filter and wastegate |
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| US11703017B2 (en) | 2021-08-16 | 2023-07-18 | Ford Global Technologies, Llc | Methods and systems for reducing hydrocarbon emissions |
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| CN108798930B (en) | 2020-07-17 |
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