CN103807057B - A kind of EGR system - Google Patents
A kind of EGR system Download PDFInfo
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- CN103807057B CN103807057B CN201410029101.1A CN201410029101A CN103807057B CN 103807057 B CN103807057 B CN 103807057B CN 201410029101 A CN201410029101 A CN 201410029101A CN 103807057 B CN103807057 B CN 103807057B
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- cylinder
- exhaust
- exhaust channel
- manifold
- electromotor
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- Y02T10/121—
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- Exhaust-Gas Circulating Devices (AREA)
Abstract
A kind of EGR system, belongs to burning and the draining technology field of automobile engine, and the cylinder of electromotor connects inlet manifold and exhaust manifold, and the inlet manifold of cylinder is connected to compressor by air throttle and charge air cooler；Each cylinder of electromotor is divided into two groups according to firing order mode separately, the exhaust manifold of one of which cylinder converges for exhaust channel I, the exhaust manifold of another group cylinder converges for exhaust channel II, exhaust channel I is connected to the turbine for providing power to compressor, and exhaust channel II passes sequentially through cooler for recycled exhaust gas and control valve II is connected to inlet manifold.When each cylinder being connected with exhaust channel I is when being in induction stroke, exhaust channel II all exists a certain cylinder and is exactly in exhaust stroke, there is provided EGR gas to the cylinder being in induction stroke in exhaust channel I, make cylinder realize stable EGR rate, stable and reliable in work.
Description
Technical field
The invention belongs to burning and the draining technology field of automobile engine, be related specifically to a kind of automobile engine EGR(waste gas recirculation) system.
Background technology
In the face of inevitable local and the environmental issue in the whole world and the energy shortage being likely to occur, automobile and power set thereof must be able to adapt to the needs of 21 century development.Many countries are occupied in exploitation fuel-economizing and the electromotor of low emission.As Four valve, Electrocontrolled high-pressure injection, turbocharging and in the advanced technology such as cold, VVA, EGR, preprocessor, make the fuel consumption and emission performance of electromotor be significantly improved and improve.Wherein, EGR technology has become as a kind of indispensable advanced technology on clean and effective electromotor, and it can be greatly lowered NO while improving Fuel EconomyXDischarge.
Research currently, with respect to egr system is broadly divided into following several: a. maximum differential pressure circulates, i.e. EGR exhaust is drawn before turbine, introduces before compressor；B. cycle of higher pressure, i.e. EGR exhaust are drawn before turbine, introduce after compressor；C. low pressure recycle, i.e. EGR exhaust are drawn after turbine, introduce before compressor.Saic Chery Automobile Co., Ltd proposes and a kind of electromotor can be made to realize the egr system of constant external EGR rate in all operating modes, and publication No. is CN 102207046 A.This system two shortcomings of existence: one, for four-cylinder, the waste gas of one cylinder is fully incorporated in inlet manifold, can ensure that each cylinder EGR rate is 25% in theory, but actually owing to there is sequentially fired problem, there is intermittence, i.e. when a cylinder is in exhaust stroke, the most a certain cylinder is in induction stroke, when other two cylinder is in induction stroke, there is no exhaust gas source, it is impossible to ensure its required EGR rate；Its two, substantial amounts of academic documents is it has been proved that different engine operating condition is different to the demand of EGR rate, and each engine operating condition exists an optimal EGR rate, and this egr system can only realize constant EGR rate under each operating mode, and engine performance is poor.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of EGR system, it is possible to solve existing egr system job insecurity, and EGR rate can not the problem of Effective Regulation.
To achieve these goals, the technical solution used in the present invention is: a kind of EGR system, the cylinder of described electromotor connects has inlet manifold and exhaust manifold, the inlet manifold of described cylinder to be connected to compressor by air throttle and charge air cooler；Each cylinder of described electromotor is divided into two groups according to firing order mode separately, the exhaust manifold of one of which cylinder converges for exhaust channel I, the exhaust manifold of another group cylinder converges for exhaust channel II, exhaust channel I is connected to the turbine for providing power to compressor, and exhaust channel II passes sequentially through cooler for recycled exhaust gas and control valve II is connected to inlet manifold.
Described exhaust channel II is connected to the after-treatment device for processing waste gas also by control valve I.
Described turbine is connected with the after-treatment device being used for processing waste gas.
What the present invention brought has the beneficial effect that
A kind of EGR system that the present invention the provides design by two exhaust channels, each cylinder of electromotor is divided into two groups according to firing order mode separately, the exhaust manifold of one of which cylinder converges for exhaust channel I, the exhaust manifold of another group cylinder converges for exhaust channel II, the effect so arranged is: when each cylinder being connected with exhaust channel I is when being in induction stroke, exhaust channel II all exists a certain cylinder and is exactly in exhaust stroke, EGR gas is provided to the cylinder being in induction stroke in exhaust channel I, cylinder is made to realize stable EGR rate, stable and reliable in work.
Exhaust channel II arranges two control valves, control valve I and control valve II, electromotor can be made can be operated in optimal state under each operating mode according to the EGR rate of the operating mode regulation and control each cylinder of electromotor of different electromotors, improve the performance of electromotor.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Reference: 1, inlet manifold, 2, control valve II, 3, cooler for recycled exhaust gas, 4, control valve I, 5, after-treatment device, 6, exhaust channel II, 7, exhaust channel I, 8, turbine, 9, compressor, 10, charge air cooler, 11, air throttle.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.
As it is shown in figure 1, a kind of EGR system, the cylinder of described electromotor connects inlet manifold 1 and exhaust manifold, and the inlet manifold 1 of described cylinder is connected to compressor 9 by air throttle 11 and charge air cooler 10；Each cylinder of described electromotor is divided into two groups according to firing order mode separately, the exhaust manifold of one of which cylinder converges for exhaust channel I 7, the exhaust manifold of another group cylinder converges for exhaust channel II 6, exhaust channel I 7 is connected to the turbine 8 for providing power to compressor 9, and exhaust channel II 6 passes sequentially through cooler for recycled exhaust gas 3 and control valve II 2 is connected to inlet manifold 1.
Described exhaust channel II 6 is connected to the after-treatment device 5 for processing waste gas also by control valve I 4.
Described turbine 8 is connected with the after-treatment device 5 being used for processing waste gas.
As a example by four cylinder engine, cylinder numbers is from left to right followed successively by A, B, C, D, and firing order is A-C-D-B.The exhaust manifold of B, C cylinder converges for exhaust channel I 7, and the exhaust manifold of A, D cylinder converges for exhaust channel II 6.When electromotor operates, the waste gas in exhaust channel I 7 flows through turbine 8, provides energy to compressor 9.Waste gas in exhaust channel II 6 enters in inlet manifold 1 by cooler for recycled exhaust gas 3 and control valve II 2, it is achieved waste gas recirculation.It is now assumed that bent axle is in time forwarding 180 degree to for 0 degree, A cylinder is in exhaust stroke, obtains B, C, D cylinder by firing order reasoning and is respectively at induction stroke, expansion stroke, compression stroke, then the waste gas that A cylinder is discharged can be in exhaust channel II 6 enters B cylinder；When bent axle is in time forwarding 360 degree to for 180 degree, and A cylinder is in induction stroke, in pipeline, on remaining A cylinder, the waste gas of one-stroke remains to enter A cylinder；When bent axle is in time forwarding 540 degree to for 360 degree, and D cylinder is in exhaust stroke, now C cylinder is in induction stroke, and the waste gas that D cylinder is discharged can be in exhaust channel II 6 enters C cylinder；When bent axle is in time forwarding 720 degree to for 540 degree, and D cylinder is in induction stroke, in pipeline, on remaining D cylinder, the waste gas of one-stroke remains to enter D cylinder.I.e. in a cycle of operation, all can guarantee that the demand of electromotor each cylinder EGR rate, stable and reliable in work.In like manner, it is possible to being converged by the exhaust manifold of B, C cylinder for exhaust channel II 6, the exhaust manifold of A, D cylinder converges for exhaust channel I 7.
Further, it is also possible to changed the EGR rate of each cylinder continuously by the aperture of control valve I 4, control valve II 2, make electromotor can be operated in optimal 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, then interval is chosen E, F, D cylinder and is connected to exhaust channel I 7, A, C, B cylinder is connected to exhaust channel II 6, the by that analogy annexation of other electromotor.The annexation so arranged can ensure that: when each cylinder being connected with exhaust channel I 7 is when being in induction stroke, exhaust channel II 6 all exists a certain cylinder and is exactly in exhaust stroke, there is provided EGR gas to the cylinder being in induction stroke in exhaust channel I 7, thus reach to realize the purpose of stable EGR rate.
Claims (1)
1. an EGR system, the cylinder of described electromotor connects inlet manifold (1) and exhaust manifold, and the inlet manifold (1) of described cylinder is connected to compressor (9) by air throttle (11) and charge air cooler (10)；It is characterized in that: each cylinder of described electromotor is divided into two groups according to firing order mode separately, the exhaust manifold of one of which cylinder converges for exhaust channel I (7), the exhaust manifold of another group cylinder converges for exhaust channel II (6), exhaust channel I (7) is connected to the turbine (8) for providing power to compressor (9), and exhaust channel II (6) passes sequentially through cooler for recycled exhaust gas (3) and control valve II (2) is connected to inlet manifold (1)；Described exhaust channel II (6) is connected to the after-treatment device (5) for processing waste gas also by control valve I (4)；Described turbine (8) is connected with the after-treatment device (5) being used for processing waste gas, and the cylinder of described electromotor is four cylinder engine or six cylinder engine.
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 CN103807057A (en) | 2014-05-21 |
| CN103807057B true 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 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016111686A1 (en) * | 2015-07-13 | 2017-01-19 | Ford Global Technologies, Llc | Method of improving blowby and EGR via a split outlet |
| CN105089863B (en) * | 2015-09-10 | 2024-03-29 | 谢晓宇 | Exhaust gas recirculation device of multi-cylinder four-stroke internal combustion engine |
| GB2578179B8 (en) * | 2019-03-07 | 2020-12-02 | Cox Powertrain Ltd | Marine motor with a 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 |
Citations (2)
| 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 |
| 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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3652808B2 (en) * | 1996-08-26 | 2005-05-25 | 日野自動車株式会社 | Exhaust gas recirculation system for multi-cylinder engine with supercharger |
| SE516446C2 (en) * | 2000-05-22 | 2002-01-15 | Scania Cv Ab | Process and apparatus for exhaust gas recirculation in an internal combustion engine and such overcharged diesel engine |
| JP3796102B2 (en) * | 2000-07-10 | 2006-07-12 | 日野自動車株式会社 | EGR device |
| 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 (2)
| 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 |
| 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 |
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|---|---|
| CN103807057A (en) | 2014-05-21 |
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