CN103807057A - EGR system for automobile engine - Google Patents
EGR system for automobile engine Download PDFInfo
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- CN103807057A CN103807057A CN201410029101.1A CN201410029101A CN103807057A CN 103807057 A CN103807057 A CN 103807057A CN 201410029101 A CN201410029101 A CN 201410029101A CN 103807057 A CN103807057 A CN 103807057A
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- exhaust
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- gas
- egr
- exhaust passage
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- Y02T10/121—
Abstract
The invention belongs to the technical field of combustion and exhaust of an automobile engine, and discloses an EGR system for the automobile engine. Each air cylinder of the engine is connected with an inlet manifold and an exhaust manifold. The inlet manifold of each air cylinder is connected to a gas compressor through a throttle plate and an intercooler. The air cylinders of the engine are divided into two sets according to the firing order in an alternating mode, the exhaust manifolds of one set of the air cylinders are combined into an exhaust passage I, and the exhaust manifolds of the other set of the air cylinders are combined into an exhaust passage II. The exhaust passage I is connected to a turbine providing power for the gas compressor. The exhaust passage II is sequentially connected to the inlet manifolds through an EGR cooler and a control valve II. When each air cylinder connected with the exhaust passage I is in the inlet stroke, a certain air cylinder in the exhaust passage II is in the exhaust stroke, the air cylinder in the inlet stroke in the exhaust passage I is provided with recycled exhaust gas, and therefore a stable EGR rate of the air cylinders of the engine is achieved, and work is stable and reliable.
Description
Technical field
The invention belongs to the combustion and emission technical field of motor car engine, specially refer to a kind of motor car engine EGR(EGR) system.
Background technique
In the face of inevitably local and global environmental issue and the energy shortage that may occur, automobile and power plant thereof must be able to adapt to the needs of 21 century development.Many countries are occupied in the motor of exploitation fuel-economizing and low emission.Picture four valves, Electrocontrolled high-pressure injection, turbosupercharging and in the advanced technology such as cold, VVA, EGR, preprocessor, make the fuel consumption and emission performance of motor be significantly improved and improve.Wherein, EGR technology has become a kind of indispensable advanced technology on clean and effective motor, and it can, in improving Fuel Economy, significantly reduce NO
xdischarge.
At present, be substantially divided into following several about the research of egr system: the circulation of a. Maximum differential pressure, EGR waste gas is drawn from turbo machine, from gas compressor, introduces; B. cycle of higher pressure, EGR waste gas is drawn from turbo machine, from gas compressor, introduces; C. low pressure recycle, EGR waste gas is drawn from turbo machine, from gas compressor, introduces.Saic Chery Automobile Co., Ltd has proposed a kind of motor that can make and has realized in all operating modes the egr system that constant outside EGR leads, and publication No. is CN 102207046 A.There are two shortcomings in this system: one, concerning four-cylinder, the waste gas of a cylinder is all introduced in intake manifold, can be guaranteed that in theory it is 25% that each cylinder EGR leads, but in fact owing to there being sequentially fired problem, there is intermittence, when a cylinder is during in exhaust stroke, only has a certain cylinder in aspirating stroke, when other two cylinder is during in aspirating stroke, there is no exhaust gas source, can not guarantee that its required EGR leads; Its two, a large amount of academic documents is verified, the demand difference that different engine operating conditions leads EGR, each engine operating condition exists a best EGR to lead, this egr system can only be realized constant EGR and lead under each operating mode, engine performance is poor.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of EGR system is provided, can solves existing egr system job insecurity, EGR leads problem that can not Effective Regulation.
To achieve these goals, the technical solution used in the present invention is: a kind of EGR system, and the cylinder of described motor is connected with intake manifold and gas exhaust manifold, and the intake manifold of described cylinder is connected to gas compressor by closure and intercooler; Each cylinder of described motor is divided into two groups according to firing order mode separately, wherein the gas exhaust manifold of one group of cylinder converges for exhaust passageway I, the gas exhaust manifold of another group cylinder converges for exhaust passageway II, exhaust passageway I is connected to the turbo machine for power is provided to gas compressor, and exhaust passageway II is connected to intake manifold by cooler for recycled exhaust gas and control valve II successively.
Described exhaust passageway II is also connected to the after-treatment device for the treatment of waste gas by control valve I.
Described turbo machine is connected with the after-treatment device for the treatment of waste gas.
The beneficial effect that the present invention brings is:
A kind of EGR system provided by the invention is by the design of two exhaust passageways, each cylinder of motor is divided into two groups according to firing order mode separately, wherein the gas exhaust manifold of one group of cylinder converges for exhaust passageway I, the gas exhaust manifold of another group cylinder converges for exhaust passageway II, the effect arranging is like this: when the each cylinder being connected with exhaust passageway I is when in aspirating stroke, in exhaust passageway II, all exist a certain cylinder just in time in exhaust stroke, in supply and exhaust path I, provide EGR gas in the cylinder of aspirating stroke, making cylinder realize stable EGR leads, working stability is reliable.
Two control valves are set in exhaust passageway II, and control valve I and control valve II, can lead according to the EGR of the each cylinder of operating mode regulation and control motor of different motors, makes motor can be operated in best state under each operating mode, improves the performance of motor.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Reference character: 1, intake manifold, 2, control valve II, 3, cooler for recycled exhaust gas, 4, control valve I, 5, after-treatment device, 6, exhaust passageway II, 7, exhaust passageway I, 8, turbo machine, 9, gas compressor, 10, intercooler, 11, closure.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 1, a kind of EGR system, the cylinder of described motor is connected with intake manifold 1 and gas exhaust manifold, and the intake manifold 1 of described cylinder is connected to gas compressor 9 by closure 11 and intercooler 10; Each cylinder of described motor is divided into two groups according to firing order mode separately, wherein the gas exhaust manifold of one group of cylinder converges for exhaust passageway I 7, the gas exhaust manifold of another group cylinder converges for exhaust passageway II 6, exhaust passageway I 7 is connected to the turbo machine 8 for power is provided to gas compressor 9, and exhaust passageway II 6 is connected to intake manifold 1 by cooler for recycled exhaust gas 3 and control valve II 2 successively.
Described exhaust passageway II 6 is also connected to the after-treatment device 5 for the treatment of waste gas by control valve I 4.
Described turbo machine 8 is connected with the after-treatment device 5 for the treatment of waste gas.
Take four cylinder engine as example, cylinder numbers is from left to right followed successively by A, B, C, D, and firing order is A-C-D-B.The gas exhaust manifold of B, C cylinder converges for exhaust passageway I 7, and the gas exhaust manifold of A, D cylinder converges for exhaust passageway II 6.In the time of engine running, the waste gas streams in exhaust passageway I 7, through turbo machine 8, provides energy to gas compressor 9.Waste gas in exhaust passageway II 6 enters in intake manifold 1 by cooler for recycled exhaust gas 3 and control valve II 2, realizes EGR.Now suppose that bent axle forwards 180 to while spending from 0 degree, A cylinder, in exhaust stroke, obtains B, C, D cylinder respectively in aspirating stroke, expansion stroke, compression stroke by firing order reasoning, and the waste gas that A cylinder is discharged can be in exhaust passageway II 6 enters B cylinder; When bent axle forwards 360 to while spending from 180 degree, A cylinder is in aspirating stroke, and in pipeline, on remaining A cylinder, the waste gas of one-stroke still can enter A cylinder; When bent axle forwards 540 to while spending from 360 degree, D cylinder is in exhaust stroke, and now C cylinder is in aspirating stroke, and the waste gas that D cylinder is discharged can be in exhaust passageway II 6 enters C cylinder; When bent axle forwards 720 to while spending from 540 degree, D cylinder is in aspirating stroke, and in pipeline, on remaining D cylinder, the waste gas of one-stroke still can enter D cylinder.In a work cycle, all can guarantee the demand that the each cylinder EGR of motor leads, working stability is reliable.In like manner, also the gas exhaust manifold of B, C cylinder can be converged for exhaust passageway II 6, the gas exhaust manifold of A, D cylinder converges for exhaust passageway I 7.
In addition, the EGR that can also continuously change each cylinder by the aperture of control valve I 4, control valve II 2 leads, and makes motor can be operated in best state under each operating mode.
For six cylinder engine, cylinder numbers is from left to right followed successively by A, B, C, D, E, F, the firing order of six cylinder engine is A-E-C-F-B-D, E, F are chosen in interval, D cylinder is connected to exhaust passageway I 7, A, C, B cylinder are connected to exhaust passageway II 6, by that analogy the annexation of other motor.The annexation arranging like this can guarantee: when the each cylinder being connected with exhaust passageway I 7 is when in aspirating stroke, in exhaust passageway II 6, all exist a certain cylinder just in time in exhaust stroke, in supply and exhaust path I 7, provide EGR gas in the cylinder of aspirating stroke, realize thereby reach the object that stable EGR leads.
Claims (3)
1. an EGR system, the cylinder of described motor is connected with intake manifold (1) and gas exhaust manifold, and the intake manifold (1) of described cylinder is connected to gas compressor (9) by closure (11) and intercooler (10); It is characterized in that: each cylinder of described motor is divided into two groups according to firing order mode separately, wherein the gas exhaust manifold of one group of cylinder converges for exhaust passageway I (7), the gas exhaust manifold of another group cylinder converges for exhaust passageway II (6), exhaust passageway I (7) is connected to the turbo machine (8) for power is provided to gas compressor (9), and exhaust passageway II (6) is connected to intake manifold (1) by cooler for recycled exhaust gas (3) and control valve II (2) successively.
2. a kind of EGR system as claimed in claim 1, is characterized in that: described exhaust passageway II (6) is also connected to the after-treatment device (5) for the treatment of waste gas by control valve I (4).
3. a kind of EGR system as claimed in claim 1, is characterized in that: described turbo machine (8) is connected with the after-treatment device (5) for the treatment of waste gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410029101.1A CN103807057B (en) | 2014-01-22 | 2014-01-22 | A kind of EGR system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410029101.1A CN103807057B (en) | 2014-01-22 | 2014-01-22 | A kind of EGR system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103807057A true CN103807057A (en) | 2014-05-21 |
| CN103807057B CN103807057B (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410029101.1A Expired - Fee Related CN103807057B (en) | 2014-01-22 | 2014-01-22 | A kind of EGR system |
Country Status (1)
| Country | Link |
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| CN (1) | CN103807057B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105089863A (en) * | 2015-09-10 | 2015-11-25 | 谢晓宇 | Exhaust recirculation device for multi-cylinder and four-stroke internal combustion engine |
| CN106351770A (en) * | 2015-07-13 | 2017-01-25 | 福特环球技术公司 | Method to improve blowthrough and EGR via split exhaust |
| CN110173381A (en) * | 2019-07-09 | 2019-08-27 | 昆山三一动力有限公司 | Engine and vehicle |
| CN113891990A (en) * | 2019-03-07 | 2022-01-04 | 考克斯传动有限公司 | Marine motor with dual flow exhaust gas recirculation system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4249382A (en) * | 1978-05-22 | 1981-02-10 | Caterpillar Tractor Co. | Exhaust gas recirculation system for turbo charged engines |
| JPH1061503A (en) * | 1996-08-26 | 1998-03-03 | Hino Motors Ltd | Exhaust gas recirculation device of multi-cylinder engine with supercharger |
| JP2002021625A (en) * | 2000-07-10 | 2002-01-23 | Hino Motors Ltd | Egr device |
| US20040011036A1 (en) * | 2000-05-22 | 2004-01-22 | Ove Sponton | Method and device for exhaust recycling and supercharged diesel engine |
| CN102207046A (en) * | 2011-06-01 | 2011-10-05 | 奇瑞汽车股份有限公司 | EGR (Exhaust Gas Recycling) system of automobile engine |
| CN203948199U (en) * | 2014-01-22 | 2014-11-19 | 河南科技大学 | A kind of EGR system |
-
2014
- 2014-01-22 CN CN201410029101.1A patent/CN103807057B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4249382A (en) * | 1978-05-22 | 1981-02-10 | Caterpillar Tractor Co. | Exhaust gas recirculation system for turbo charged engines |
| JPH1061503A (en) * | 1996-08-26 | 1998-03-03 | Hino Motors Ltd | Exhaust gas recirculation device of multi-cylinder engine with supercharger |
| US20040011036A1 (en) * | 2000-05-22 | 2004-01-22 | Ove Sponton | Method and device for exhaust recycling and supercharged diesel engine |
| JP2002021625A (en) * | 2000-07-10 | 2002-01-23 | Hino Motors Ltd | Egr device |
| CN102207046A (en) * | 2011-06-01 | 2011-10-05 | 奇瑞汽车股份有限公司 | EGR (Exhaust Gas Recycling) system of automobile engine |
| CN203948199U (en) * | 2014-01-22 | 2014-11-19 | 河南科技大学 | A kind of EGR system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106351770A (en) * | 2015-07-13 | 2017-01-25 | 福特环球技术公司 | Method to improve blowthrough and EGR via split exhaust |
| CN106351770B (en) * | 2015-07-13 | 2020-06-19 | 福特环球技术公司 | Method for improving blowby gas and EGR via separating exhaust gases |
| CN105089863A (en) * | 2015-09-10 | 2015-11-25 | 谢晓宇 | Exhaust recirculation device for multi-cylinder and four-stroke internal combustion engine |
| CN105089863B (en) * | 2015-09-10 | 2024-03-29 | 谢晓宇 | Exhaust gas recirculation device of multi-cylinder four-stroke internal combustion engine |
| CN113891990A (en) * | 2019-03-07 | 2022-01-04 | 考克斯传动有限公司 | Marine motor with dual flow exhaust gas recirculation system |
| CN110173381A (en) * | 2019-07-09 | 2019-08-27 | 昆山三一动力有限公司 | Engine and vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103807057B (en) | 2016-09-14 |
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Granted publication date: 20160914 Termination date: 20170122 |