CN101858280B - Exhaust gas recirculation system and method - Google Patents
Exhaust gas recirculation system and method Download PDFInfo
- Publication number
- CN101858280B CN101858280B CN2010102077974A CN201010207797A CN101858280B CN 101858280 B CN101858280 B CN 101858280B CN 2010102077974 A CN2010102077974 A CN 2010102077974A CN 201010207797 A CN201010207797 A CN 201010207797A CN 101858280 B CN101858280 B CN 101858280B
- Authority
- CN
- China
- Prior art keywords
- waste gas
- value
- egr
- egr valve
- intercooler
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title abstract description 36
- 239000002912 waste gas Substances 0.000 claims description 139
- 239000007789 gas Substances 0.000 claims description 52
- 238000001816 cooling Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses an exhaust gas recirculation system and an exhaust gas recirculation method, belonging to the field of exhaust gas recirculation. The system comprises an air flowmeter, an ECU (Electronic Control Unit), a first intercooler, a first EGR (Exhaust Gas Recirculation) valve, a first EGR flowmeter and a second intercooler. In the invention, the first EGR valve controls the recirculated first exhaust gas valve, the exhaust gas is cooled secondarily and then circulates to an engine to realize the recirculation under the high-load work condition of the engine; and the flowmeter is used for calculating the air value and the first exhaust gas value, the recirculation exhaust gas of the engine is exactly and effectively controlled according to the air value and the first exhaust gas value so as to guarantee the circulation stability of the engine. In addition, the temperature of the exhaust gas circulating to the engine can be well adjusted according to the temperature of the second intercooler so that the dynamic property of the engine is ensured.
Description
Technical field
The present invention relates to the exhaust gas recirculation field, particularly a kind of EGR (Exhaust Gas Recirculation, exhaust gas recirculation) system and method.
Background technique
Egr system is to the set Exhaust gas purifying device of oxynitrides in the motor combustion gas; Because oxynitrides has inertia meeting retarded combustion process; Through small amount of exhaust gas being got into motor and fresh air mixed combustion, can reduce the temperature in the engine body, thereby suppress the generation of oxynitrides; Reduce the content of the oxynitrides in the waste gas, improve the emission level of motor.
Existing egr system comprises ECU (Electronic Control Unit; Electronic control unit), intercooler, EGR valve and EGR flowmeter; Be used under the engine low load operating mode; Waste gas cools off at intercooler, and opens the EGR valve through ECU control, waste gas cooled is got into motor carry out recirculation.
In realizing process of the present invention, the inventor finds that there is following problem at least in existing technology:
Because under the high engine load operating mode, in-engine gas pressure is very big, receives the influence of factors such as cost, component and reliability, existing egr system can't carry out recirculation to waste gas under the high engine load operating mode.
Summary of the invention
In order to realize under the high engine load operating mode waste gas being carried out recirculation, the embodiment of the invention provides gas recirculation system and method.Said technological scheme is following:
On the one hand, a kind of gas recirculation system is provided, has comprised:
Air flow meter is used to obtain the air value that gets into motor, and the air value of obtaining is sent to electronic control unit ECU;
ECU; Be used for the air value of admission of air flowmeter transmission and the first waste gas value that an EGR flowmeter sends; Control the unlatching size of an EGR valve according to said air value and the said first waste gas value, control through the cooling of first intercooler, be used for the circuit first waste gas value;
First intercooler is used for before turbo machine, taking out the waste gas that motor is discharged, and cools off;
The one EGR valve, be used for control cooled through first intercooler, be used for the circuit first waste gas value;
The one EGR flowmeter, be used to obtain cooled through first intercooler, be used for the circuit first waste gas value, and the first waste gas value that will obtain sends to ECU;
Second intercooler, be used for to behind gas compressor, take out, the cooled waste gas of first intercooler cools off, and cooled waste gas got into motor circulate;
The 2nd EGR valve, be used for control cooled through said first intercooler, be used for circuit waste gas;
The 2nd EGR flowmeter be used to obtain the second waste gas value of said the 2nd EGR valve control, and the second waste gas value that will obtain sends to ECU;
ECU also is used to receive the second waste gas value that the 2nd EGR flowmeter sends, and controls the 2nd EGR valve.
On the other hand, a kind of exhaust gas recirculation method is provided also, has comprised:
Air flow meter is obtained the air value that gets into motor, and the air value of obtaining is sent to ECU;
ECU controls the unlatching of an EGR valve according to engine operating condition; The first waste gas value that an air value that the admission of air flowmeter sends and an EGR flowmeter send; Control the unlatching size of an EGR valve according to said air value and the said first waste gas value, control through the cooling of first intercooler, be used for the circuit first waste gas value;
First intercooler takes out the waste gas that motor is discharged before turbo machine, and cools off;
The one EGR valve control is cooled through first intercooler, be used for the circuit first waste gas value;
That the one EGR flowmeter obtains is cooled through first intercooler, be used for the circuit first waste gas value, and the first waste gas value that will obtain sends to ECU;
Second intercooler to before gas compressor, take out, the cooled waste gas of first intercooler cools off, and cooled waste gas got into motor circulate.
The beneficial effect that the technological scheme that the embodiment of the invention provides is brought is:
The embodiment of the invention is carried out recirculated first exhaust gas through EGR valve control, and with being recycled to motor after the cooling of waste gas process secondary, realizes the recirculation under the high engine load operating mode; And through adopting flowmeter to calculate the air value and the first waste gas value, control the first waste gas value accurately and efficiently, guarantee the cyclical stability of motor according to the air value and the first waste gas value; In addition, according to the temperature that the temperature of second intercooler can be regulated the waste gas that is recycled to motor well, guarantee the power character of motor.
Description of drawings
In order to be illustrated more clearly in the technological scheme in the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the gas recirculation system structural representation that provides in the embodiment of the invention 1;
Fig. 2 is the gas recirculation system structural representation that provides in the embodiment of the invention 2;
Fig. 3 is the ECU structural representation that provides in the embodiment of the invention 2;
Fig. 4 is the exhaust gas recirculation method flow diagram that provides in the embodiment of the invention 3;
Fig. 5 is the exhaust gas recirculation method flow diagram that provides in the embodiment of the invention 4.
Embodiment
For making the object of the invention, technological scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below, but not as to qualification of the present invention.
Embodiment 1
Referring to Fig. 1, the embodiment of the invention provides a kind of gas recirculation system, is used under the high engine load, and waste gas is carried out recirculation, and the structure of this system is specific as follows:
Particularly; Gas handling system enters into motor with ozone through Air flow meter 101; Before Air flow meter 101 is located at and is positioned at motor gas compressor before; Air flow meter 101 can be obtained the air value that gets into motors via Air flow meter 101, and the method that Air flow meter 101 is obtained the air value can have multiple, and the embodiment of the invention does not limit the method for obtaining the air value; Only obtaining the air value of unit time with Air flow meter 101 is that example describes, and the air value that Air flow meter 101 will be obtained the unit time sends to ECU102;
ECU102 is used for the air value of admission of air flowmeter 101 transmissions and the first waste gas value that an EGR flowmeter 105 sends, and controls an EGR valve 104;
To this equipment; ECU102 connects motor; Obtain motor present located operating mode according to engine speed and throttle position, ECU102 obtains motor present located operating mode can pass through existing techniques in realizing, and the embodiment of the invention does not limit concrete obtain manner.When the engine operating condition that ECU102 gets access to is the high load operating mode, controls an EGR valve 104 and open.
In the engine operation; The air value and the first waste gas value of each unit time that a continuous admission of air flowmeter 101 of ECU102 and an EGR flowmeter 105 send; Through respectively the air value and the first waste gas value of each unit time being computed weighted, can get access to the air value and the first waste gas value that get into motor in the random time section; ECU102 calculates first recirculation rate under the high engine load operating mode according to the air value and the first waste gas value that receive, controls the size that an EGR valve 104 is opened according to first recirculation rate, thereby controls the first waste gas value.
Wherein, first intercooler 103 is arranged between motor and the turbo machine, because turbo machine is less with respect to the pressure of motor, first intercooler 103 can take out the waste gas that motor is discharged before turbo machine.The method of first intercooler and cooled exhaust air can have multiple, and the embodiment of the invention does not limit the method for first intercooler and cooled exhaust air.
The one EGR valve 104, be used for control 103 cooled through first intercooler, be used for the circuit first waste gas value;
Particularly, the embodiment of the invention does not limit the type of an EGR valve 104, is that electromagnetic type EGR valve is that example describes with an EGR valve 104 only.Under high engine load; The one EGR valve 104 is opened by ECU102 control; And control the unlatching size of an EGR valve 104 according to air value and the first waste gas value by ECU102; Control through the cooling of first intercooler 103, be used for the circuit first waste gas value, this first waste gas value is meant by what an EGR flowmeter 105 obtained and is used for the circuit exhausted air quantity.
The one EGR flowmeter 105 be used to obtain the first waste gas value of an EGR valve 104 controls, and the first waste gas value that will obtain sends to ECU102;
Particularly; The one EGR flowmeter 105 is arranged between Air flow meter 101 and the gas compressor; Because gas compressor is less with respect to the pressure of Air flow meter 101; Waste gas via an EGR flowmeter 105 can get into gas compressor, and gas compressor reduces pressure to waste gas, therefore diminishes via the post-decompression exhaust gas pressure of gas compressor; Under high engine load; The method that the one EGR flowmeter 105 obtains the waste gas value can have multiple; The embodiment of the invention does not limit the method for obtaining the waste gas value; Only obtaining the waste gas value of unit time with an EGR flowmeter 105 is that example describes, and the waste gas value that first flow meter 105 will obtain the unit time sends to ECU102;
Wherein, second intercooler 106 takes out waste gas behind gas compressor, and waste gas is carried out the secondary cooling.Second intercooler can have multiple; The embodiment of the invention does not limit second intercooler; Second intercooler carries out recirculation to getting into motor through cooled, the cooled waste gas of first intercooler, can be recycled to the temperature of the waste gas of motor according to the temperature regulation of second intercooler.
The gas recirculation system that the embodiment of the invention provides, under the high engine load operating mode, the waste gas of discharging through motor is recycled to motor after through first intercooler and the cooling of the second intercooler secondary, realizes the recirculation under the high engine load operating mode; And through adopting flowmeter to calculate the air value and the first waste gas value, ECU controls the first waste gas value accurately and efficiently according to the air value and the first waste gas value, guarantees the cyclical stability of motor; In addition, according to the temperature that the temperature of second intercooler can be regulated the waste gas that is recycled to motor well, guarantee the power character of motor.
Embodiment 2
In order to realize the exhaust gas recirculation of motor under different operating modes; The embodiment of the invention provides a kind of gas recirculation system; Referring to Fig. 2; This gas recirculation system has two kinds of EGR pipelines, can either be used for the exhaust gas recirculation under the high engine load, also can be used in the exhaust gas recirculation under the engine low load operating mode.The gas recirculation system of the embodiment of the invention also comprises:
ECU102 also is used for ECU and also is used to receive the second waste gas value that the 2nd EGR flowmeter 108 sends, and controls the 2nd EGR valve 107;
When the engine operating condition that ECU102 gets access to is running on the lower load, controls the 2nd EGR valve 107 and open; ECU102 calculates second recirculation rate under the engine low load operating mode according to the air value and the second waste gas value that receive, controls the size that the 2nd EGR valve 107 is opened according to second recirculation rate, thereby controls the second waste gas value.
Correspondingly, referring to Fig. 3, ECU102 specifically comprises:
Obtain subelement 1021, be used to obtain the operating mode of motor;
First control sub unit 1022 is used for reaching first recirculation rate that computation subunit 1027 is sent according to obtaining the high engine load operating mode that subelement 1021 gets access to, and controls an EGR valve 104;
Second control sub unit 1023 is used for reaching second recirculation rate that computation subunit 1027 is sent according to obtaining the engine low load operating mode that subelement 1021 gets access to, and controls the 2nd EGR valve 107;
First receives subelement 1024, is used for the air value that admission of air flowmeter 101 sends, and sends to computation subunit 1027;
Second receives subelement 1025, is used to receive the first waste gas value that an EGR flowmeter 105 sends, and sends to computation subunit 1027;
The 3rd receives subelement 1026, is used to receive the second waste gas value that the 2nd EGR flowmeter 108 sends, and sends to computation subunit 1027;
The 2nd EGR valve 107, be used for control 103 cooled through first intercooler, be used for circuit waste gas;
Particularly, the embodiment of the invention does not limit the type of the 2nd EGR valve 107, is that electromagnetic type EGR valve is that example describes with the 2nd EGR valve 107 only.Under the engine low load operating mode; The 2nd EGR valve 107 is opened by ECU102 control; And control the unlatching size of the 2nd EGR valve 107 according to air value and the second waste gas value by ECU102; Control through the cooling of first intercooler 103, be used for the circuit second waste gas value, this second waste gas value is meant by what the 2nd EGR flowmeter 108 obtained and is used for the circuit exhausted air quantity.
The 2nd EGR flowmeter 108 be used to obtain the second waste gas value of the 2nd EGR valve 107 controls, and the second waste gas value that will obtain sends to ECU102.
Particularly, before the 2nd EGR flowmeter 108 was located at motor, the waste gas entering motor via the 2nd EGR flowmeter 108 carried out exhaust gas recirculation.
The gas recirculation system that the embodiment of the invention provides according to two kinds of EGR pipelines of engine operating condition control, is realized the exhaust gas recirculation under the Under Different Work Condition of Engine through ECU; And owing to adopt the method for flowmeter to calculate air value, the first waste gas value and the second waste gas value; Calculate the recirculation rate under the Under Different Work Condition of Engine through ECU; Thereby can control the exhaust gas recirculation under the Under Different Work Condition of Engine accurately and efficiently according to recirculation rate, guarantee the cyclical stability under the Under Different Work Condition of Engine, thereby increase the effective compression ratio of motor; Reduce the motor pumping loss; Improve engine performance, lowered oil consumption to a certain extent, satisfied the higher levels of emission request of motor; In addition; According to the temperature of first intercooler and second intercooler, can regulate the temperature that is recycled to the waste gas of motor under the different operating modes well, guarantee the power character of motor; Improve the antiknock quality of motor, thereby further improve the power per liter and the torque per liter of motor; Owing to adopt electromagnetic type EGR valve, and needn't use step motor type, lowered cost.
Embodiment 3
Referring to Fig. 4, the embodiment of the invention provides a kind of exhaust gas recirculation method, and during the high engine load operating mode, this method is specific as follows:
301, Air flow meter is obtained the air value that gets into motor, and the air value of obtaining is sent to ECU;
Particularly; When motor was started working, ozone got into motor via Air flow meter and carries out work, and Air flow meter is constantly obtained the air value that gets into motor; The method that Air flow meter is obtained the air value can have multiple; The embodiment of the invention does not limit the method for obtaining the air value, and only obtaining the air value of unit time with Air flow meter is that example describes, and the air value that Air flow meter will be obtained the unit time sends to ECU; ECU computes weighted through the air value to each unit time, can get access to the air value that gets into motor in the random time section;
302, the first waste gas value that an air value that ECU admission of air flowmeter sends and an EGR flowmeter send is controlled an EGR valve;
ECU obtains motor present located operating mode according to engine speed and throttle position, and ECU obtains motor present located operating mode can pass through existing techniques in realizing, and the embodiment of the invention does not limit concrete obtain manner.When the engine operating condition that ECU gets access to is the high load operating mode; Control an EGR opening of valves; And according to the air value and the first waste gas value that receive; Calculate first recirculation rate under the high engine load operating mode, control the size that an EGR valve 104 is opened according to first recirculation rate, thereby control the first waste gas value.
303, the first intercoolers take out the waste gas that motor is discharged before turbo machine, and cool off;
First intercooler can be initialized as opening state, also can by ECU when motor started working, control first intercooler through ECU and open.When carrying out exhaust gas recirculation, first intercooler is in starting state always, is used for the waste gas that motor is discharged is cooled off; The method of the first intercooler cooled exhaust air can have multiple, and the embodiment of the invention does not limit the method for cooled exhaust air.
304, the one EGR valves control is cooled through first intercooler, be used for the circuit first waste gas value;
Particularly, under high engine load, an EGR valve is opened by ECU control, and controls the unlatching size of an EGR valve by ECU according to the air value and the first waste gas value, controls the first waste gas value.
That 305, the one EGR flowmeters obtain is cooled through first intercooler, be used for the circuit first waste gas value, and the first waste gas value that will obtain sends to ECU;
Under high engine load; The method that the one EGR flowmeter obtains the waste gas value can have multiple; The embodiment of the invention does not limit the method for obtaining the waste gas value; Only obtaining the waste gas value of unit time with an EGR flowmeter is that example describes, and the waste gas value that the first flow meter will obtain the unit time sends to ECU.
306, the second intercoolers to before gas compressor, take out, the cooled waste gas of first intercooler cools off, and cooled waste gas got into motor carry out recirculation.
Particularly, behind the second intercooler cooled exhaust air, cooled waste gas gets into motor and carries out recirculation.
The exhaust gas recirculation method that the embodiment of the invention provides, under the high engine load operating mode, the waste gas of discharging through motor is recycled to motor after through first intercooler and the cooling of the second intercooler secondary, realizes the recirculation under the high engine load operating mode; And through the air value and the first waste gas value, control the exhaust gas recirculation of motor accurately and efficiently, guarantee the cyclical stability of motor; In addition,, can regulate the temperature of the waste gas that is recycled to motor well, guarantee the power character of motor according to the temperature of first intercooler and second intercooler.
Embodiment 4
Referring to Fig. 5, the embodiment of the invention provides a kind of exhaust gas recirculation method, and this method can either be used under high engine load, also can under engine low load, use, and this method for using is specific as follows:
401, Air flow meter is obtained the air value that gets into motor, and the air value of obtaining is sent to ECU;
402, ECU admission of air value, the first waste gas value and the second waste gas value, and control an EGR valve or control the 2nd EGR valve;
Particularly, when the engine operating condition that ECU gets access to was the high load operating mode, ECU controlled an EGR opening of valves, and according to the air value and the first waste gas value that receive, controlled an EGR valve, thereby control the first waste gas value; When the engine operating condition that ECU gets access to was running on the lower load, ECU controlled the 2nd EGR opening of valves, and according to the air value and the second waste gas value that receive, controlled the 2nd EGR valve, thereby control the second waste gas value.High engine load operating mode and running on the lower load are the operating modes of two kinds of mutual exclusions.
403, the first intercoolers take out the waste gas that motor is discharged before turbo machine, and cool off;
Under high engine load operating mode and the running on the lower load, the exhaust gas recirculation method is different, describes below;
When the high engine load operating mode:
4041, the one EGR valves control is cooled through first intercooler, be used for the circuit first waste gas value;
That 4051, the one EGR flowmeters obtain is cooled through first intercooler, be used for the circuit first waste gas value, and the first waste gas value that will obtain sends to ECU;
4061, the second intercoolers to before gas compressor, take out, the cooled waste gas of first intercooler cools off, and cooled waste gas got into motor carry out recirculation.
Said method is illustrated in the 3rd embodiment, does not elaborate here, specifies when the engine low load operating mode below:
4042, the two EGR valves control is cooled through first intercooler, be used for the circuit second waste gas value;
That 4052, the two EGR flowmeters obtain is cooled through first intercooler, be used for the circuit second waste gas value, and the second waste gas value of obtaining is sent to ECU, and cooled waste gas is got into motor carries out recirculation.
Particularly, get into motor through the cooled waste gas of first intercooler and carry out recirculation.During the engine low load operating mode, waste gas gets into motor and carries out recirculation after cooling off through the first intercooler one-level.
In addition, an EGR valve and the 2nd EGR valve can adopt electromagnetic type EGR valve.
The exhaust gas recirculation method that the embodiment of the invention provides according to two kinds of EGR pipelines of engine operating condition control, realizes the exhaust gas recirculation under the Under Different Work Condition of Engine through ECU; And owing to adopt the method for flowmeter to calculate air value, the first waste gas value and the second waste gas value; Calculate the recirculation rate under the Under Different Work Condition of Engine through ECU; Thereby can control the exhaust gas recirculation under the Under Different Work Condition of Engine accurately and efficiently according to recirculation rate, guarantee the cyclical stability under the Under Different Work Condition of Engine, thereby increase the effective compression ratio of motor; Reduce the motor pumping loss; Improve engine performance, lowered oil consumption to a certain extent, satisfied the higher levels of emission request of motor; In addition; According to the temperature of first intercooler and second intercooler, can regulate the temperature that is recycled to the waste gas of motor under the different operating modes well, guarantee the power character of motor; Improve the antiknock quality of motor, thereby further improve the power per liter and the torque per liter of motor; Owing to adopt electromagnetic type EGR valve, and needn't use step motor type, lowered cost.
All or part of content in the technological scheme that above embodiment provides can realize that through software programming its software program is stored in the storage medium that can read, storage medium for example: the hard disk in the computer, CD or floppy disk.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. gas recirculation system is characterized in that, comprising:
Air flow meter is used to obtain the air value that gets into motor, and the air value of obtaining is sent to electronic control unit ECU;
ECU; Be used for the air value of admission of air flowmeter transmission and the first waste gas value that an EGR flowmeter sends; Control the unlatching size of an EGR valve according to said air value and the said first waste gas value, control through the cooling of first intercooler, be used for the circuit first waste gas value;
First intercooler is used for before turbo machine, taking out the waste gas that motor is discharged, and cools off;
The one EGR valve is used for when said high engine load, control cooled through first intercooler, be used for the circuit first waste gas value;
The one EGR flowmeter be used to obtain the first waste gas value of EGR valve control, and the first waste gas value that will obtain sends to ECU;
Second intercooler, be used for to before gas compressor, take out, the cooled waste gas of first intercooler cools off, and cooled waste gas got into motor carry out recirculation;
The 2nd EGR valve is used for when said engine low load, and control is cooled through said first intercooler, be used for the circuit second waste gas value;
The 2nd EGR flowmeter be used to obtain the second waste gas value of said the 2nd EGR valve control, and the second waste gas value that will obtain sends to ECU;
ECU also is used to receive the second waste gas value that the 2nd EGR flowmeter sends, and controls the 2nd EGR valve.
2. the system of claim 1 is characterized in that, said ECU is specially:
Obtain subelement, be used to obtain the operating mode of motor;
First control sub unit is used for obtaining the high engine load operating mode that subelement gets access to according to said, and first recirculation rate of computation subunit transmission, controls an EGR valve;
Second control sub unit is used for obtaining the engine low load operating mode that subelement gets access to according to said, and second recirculation rate of computation subunit transmission, controls the 2nd EGR valve;
First receives subelement, is used to receive the air value that said Air flow meter is sent;
Second receives subelement, is used to receive the first waste gas value that a said EGR flowmeter sends;
The 3rd receives subelement, is used to receive the second waste gas value that said the 2nd EGR flowmeter sends;
Computation subunit is used for receiving subelement and said second according to said first and receives the air value and the first waste gas value that subelement receives, and calculates first recirculation rate under the high engine load operating mode; And receive subelement and the said the 3rd according to said first and receive the air value and the second waste gas value that subelement receives, calculate second recirculation rate under the engine low load operating mode.
3. the system of claim 1 is characterized in that, a said EGR valve is specially electromagnetic type EGR valve.
4. the system of claim 1 is characterized in that, a said EGR valve and the 2nd EGR valve are specially electromagnetic type EGR valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102077974A CN101858280B (en) | 2010-06-13 | 2010-06-13 | Exhaust gas recirculation system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102077974A CN101858280B (en) | 2010-06-13 | 2010-06-13 | Exhaust gas recirculation system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101858280A CN101858280A (en) | 2010-10-13 |
| CN101858280B true CN101858280B (en) | 2012-09-05 |
Family
ID=42944390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102077974A Active CN101858280B (en) | 2010-06-13 | 2010-06-13 | Exhaust gas recirculation system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101858280B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269609B (en) * | 2011-05-17 | 2012-11-28 | 奇瑞汽车股份有限公司 | Exhaust gas recirculation (ERG) flowmeter and EGR closed-loop control method employing flowmeter |
| CN107489521A (en) * | 2016-08-25 | 2017-12-19 | 宝沃汽车（中国）有限公司 | The control method of engine, the cooling system of engine and cooling system |
| CN112628003B (en) * | 2019-10-08 | 2022-09-27 | 上海汽车集团股份有限公司 | Engine exhaust temperature control method and device and engine exhaust temperature control system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1249800A (en) * | 1997-03-03 | 2000-04-05 | 联合讯号公司 | Exhaust gas recirculation system employing turbocharger incorporating integral pump, control valve and mixer |
| CN101368529A (en) * | 2008-09-02 | 2009-02-18 | 奇瑞汽车股份有限公司 | Low pressure EGR system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2996971B1 (en) * | 1999-01-28 | 2000-01-11 | 大阪瓦斯株式会社 | Mirror cycle engine |
| US6301888B1 (en) * | 1999-07-22 | 2001-10-16 | The United States Of America As Represented By The Administrator Of The Environmental Protection Agency | Low emission, diesel-cycle engine |
| GB2434406A (en) * | 2005-08-25 | 2007-07-25 | Ford Global Tech Llc | I.c. engine exhaust gas recirculation (EGR) system with dual high pressure and low pressure EGR loops |
-
2010
- 2010-06-13 CN CN2010102077974A patent/CN101858280B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1249800A (en) * | 1997-03-03 | 2000-04-05 | 联合讯号公司 | Exhaust gas recirculation system employing turbocharger incorporating integral pump, control valve and mixer |
| CN101368529A (en) * | 2008-09-02 | 2009-02-18 | 奇瑞汽车股份有限公司 | Low pressure EGR system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2000-220480A 2000.08.08 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101858280A (en) | 2010-10-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5681742B2 (en) | Large low-speed turbocharged two-cycle internal combustion engine having a crosshead and an exhaust gas (combustion gas) recirculation system | |
| RU2414608C2 (en) | Common cooling and control system for diesel engines | |
| CN203730120U (en) | System used for engine | |
| CN101858280B (en) | Exhaust gas recirculation system and method | |
| US20150167594A1 (en) | Engine system having turbo charger | |
| US20080135028A1 (en) | Arrangement For Recirculation Of Exhaust Gases Of A Charged Internal Combustion Engine In A Vehicle | |
| CN105051350A (en) | Internally cooled internal combustion engine and method thereof | |
| CN104712410A (en) | Cooling system for diesel engine having turbocharger | |
| JP5288046B2 (en) | Control device for internal combustion engine | |
| CN103470408A (en) | EGR (Exhaust Gas Recirculation) system used for marine medium-speed diesel engine | |
| CN104696116A (en) | Engine system having turbocharger | |
| US10876501B2 (en) | Hybrid vehicle | |
| US9309804B2 (en) | Dual path (low pressure loop and high pressure loop) EGR for improved air boosting efficiency | |
| CN103016190B (en) | Cylinder cover for turbo-charged diesel engine | |
| CN101956633A (en) | Exhaust gas recirculation system for internal combustion engine | |
| CN116857075A (en) | Control method and device for engine air system | |
| CN112196682B (en) | Method and device for controlling an exhaust gas recirculation valve | |
| US11053841B2 (en) | Methods and systems for a comprex charger | |
| US11255253B2 (en) | Methods and systems for a comprex charger | |
| CN115355083A (en) | Engine cooling method, system, equipment and storage medium | |
| CN103791732A (en) | Cooling device and cooling method for main machine equipment and auxiliary equipment of thermal power plant | |
| CN210289965U (en) | EGR exhaust gas system is got to in-line five jar diesel engine's single channel | |
| KR102398885B1 (en) | Cooling system for charging air | |
| CN220606367U (en) | Immersed liquid cooling cabinet cooling system | |
| CN108457745A (en) | A kind of internal-combustion engine system with the double by-passing valve turbines in asymmetric double channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |