CN103742303A - EGR (exhaust gas recirculation) passage structure and EGR system - Google Patents
EGR (exhaust gas recirculation) passage structure and EGR system Download PDFInfo
- Publication number
- CN103742303A CN103742303A CN201410038401.6A CN201410038401A CN103742303A CN 103742303 A CN103742303 A CN 103742303A CN 201410038401 A CN201410038401 A CN 201410038401A CN 103742303 A CN103742303 A CN 103742303A
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- cover plate
- cavity
- groove
- upper cover
- channel design
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- 239000002912 waste gas Substances 0.000 claims abstract description 19
- 239000011148 porous material Substances 0.000 claims description 41
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 description 5
- 238000004512 die casting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
Abstract
The invention provides an EGR (exhaust gas recirculation) passage structure and an EGR system. A first cavity and a second cavity in vertical arrangement are formed at the inner part of the EGR passage structure, the first cavity is communicated with the second cavity, and one end of the EGR passage structure, near the first cavity, is connected with a cylinder head of a motor; a gas inlet passage is also formed at the inner part of the EGR passage structure, the gas inlet passage is respectively communicated with the second cavity and a cylinder gas exhaust passage formed on the cylinder head of the motor, the first cavity is communicated with a cylinder gas inlet passage on the cylinder head of the motor, exhaust gas exhausted from the cylinder gas exhaust passage enters the second cavity through the gas inlet passage and enters the cylinder gas exhaust passage through the first cavity. The EGR passage is simple and compact in structure, small in volume, light in weight, and low in cost; the EGR passage structure which is arranged on the cylinder head of the motor is not limited by spatial distribution, the waste gas is reasonable to enter, and the EGR passage structure is convenient to arrange and use.
Description
Technical field
The present invention relates to technical field of automobile engine, particularly relate to a kind of EGR channel design and egr system.
Background technique
Along with the pay attention to day by day of international community to environmental protection and using energy source, vehicular engine Abgasgesetz day is tight increasingly.Therefore, adopt advanced engine technology, reduce discharge and CO
2discharge becomes the important means of each automobile, internal-combustion engine manufacturer.Wherein EGR(Exhaust Gas Recirculation, EGR) technology, a kind of effective means that has become reduction discharge and oil consumption is used widely.
Automobile-used egr system structure, mainly comprises exhaust steam passage, EGR control valve and waste gas cooling channel, and exhaust steam passage is mainly for delivery of waste gas, and existing exhaust steam passage adopts following two kinds of modes to realize conventionally, the object of reduce discharge to reach, improving burning.
Mode 1: complicated pipe-line system is introduced intake manifold by waste gas;
Mode 2: cast tube road in intake manifold, waste gas is introduced to performance, pipeline is connected with total intake manifold, then by total intake manifold, waste gas is delivered in each performance.
Pipe-line system complex structure in above-mentioned two kinds of modes, manufacture cost is higher, and because space layout is often restricted, gas inlet position is difficult to accomplish most suitable.
Therefore, need a kind of EGR channel design and egr system badly in order to solve the problems of the technologies described above.
Summary of the invention
The present invention is directed to above shortcomings in prior art, a kind of EGR channel design egr system is provided, in order to solve pipe-line system complex structure, awkward problem.
The present invention, for solving the problems of the technologies described above, adopts following technological scheme:
The invention provides a kind of EGR channel design, the inside of described EGR channel design forms the first cavity and second cavity of vertical arrangement, between the first cavity and the second cavity, is communicated with;
One end of vicinity first cavity of described EGR channel design is connected with engine cylinder cover;
The inside of described EGR channel design is also provided with gas-entered passageway, gas-entered passageway is respectively with the second cavity be arranged at the inblock cylinder air flue that engine cylinder covers and be connected, the inlet cylinder that the first cavity covers with engine cylinder is connected, so that the waste gas of discharging in inblock cylinder air flue enters the second cavity through gas-entered passageway, then enter inlet cylinder through the first cavity.
Preferably, the first cavity is connected by air outlet hole with inlet cylinder, and described air outlet hole is two or more, two or more described air outlet holes respectively be arranged at each inlet cylinder that described engine cylinder covers and be connected.
Preferably, described EGR channel design comprises: lower cover plate, lower cover plate pad, upper cover plate and upper cover plate pad, and lower cover plate, lower cover plate pad, upper cover plate and upper cover plate pad are linked in sequence from top to bottom;
On lower cover plate, be provided with the second groove of the first groove and long strip, the first groove is communicated with the second groove, and lower cover plate pad is provided with the first through hole on the position corresponding with the first groove; The second groove fit of lower cover plate pad and lower cover plate forms described the second cavity;
On upper cover plate, be provided with the 3rd groove of the second through hole and long strip, the position of the second through hole is corresponding with the position of the first through hole and the first groove, the position of the 3rd groove is corresponding with the position of the second groove, and the 3rd groove coordinates formation the first cavity with lower cover plate pad;
On lower cover plate pad, be also provided with the first pore, the first cavity is communicated with by the first pore with the second cavity;
EGR channel design is connected by upper cover plate pad with engine cylinder cover, and described two or more air outlet holes are arranged on upper cover plate pad, and is provided with third through-hole on the upper cover plate pad position corresponding with the second through hole; When lower cover plate, lower cover plate pad, upper cover plate and upper cover plate pad are linked in sequence from top to bottom, third through-hole, the second through hole and the first through hole form described gas-entered passageway, and described gas-entered passageway is connected with the second cavity by the first groove.
Preferably, described two or more air outlet hole is uniformly distributed on described upper cover plate pad.
Preferably, the bottom of the 3rd groove on described upper cover plate is provided with two or more the second pores, and described the second pore runs through described upper cover plate, and the position of the second pore is corresponding with the position of the air outlet hole on upper cover plate pad.
Preferably, described engine cylinder covers and is provided with the 3rd pore being connected with described each inlet cylinder, and described air outlet hole and the 3rd pore are connected, and the first cavity is connected by described air outlet hole, the second pore and the 3rd pore with inlet cylinder.
The present invention also provides a kind of egr system, comprising: motor and foregoing EGR channel design, described EGR channel design is arranged on the cylinder cap of described motor.
A kind of EGR channel design provided by the invention and egr system, by form the first cavity and second cavity of vertical arrangement in the inside of EGR channel design, between the first cavity and the second cavity, be communicated with, and be provided with gas-entered passageway in the inside of EGR channel design, in order to respectively with the second cavity be arranged at the inblock cylinder air flue that engine cylinder covers and be connected, the inlet cylinder that the first cavity covers with engine cylinder is connected, so that the waste gas of discharging in inblock cylinder air flue enters the second cavity through gas-entered passageway, through the first cavity, enter inlet cylinder again, this EGR channel design is simply compact, volume is little, lightweight, cost is low, and EGR channel design is arranged at engine cylinder and covers, be not subject to the restriction of space layout, gas inlet is reasonable, arrange, easy to use.
Accompanying drawing explanation
Each constituent element of EGR channel design that Fig. 1 provides for the embodiment of the present invention disassemble schematic diagram;
The structural representation of lower cover plate in the EGR channel design that Fig. 2 provides for the embodiment of the present invention;
The plan view of the EGR channel design that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 is A-A cross-sectional view in Fig. 3;
Fig. 5 is the structure enlarged view of C part in Fig. 4;
Fig. 6 is the structure enlarged view of B part in Fig. 4.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, the technological scheme in the present invention is carried out to clear, complete description, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
Below in conjunction with accompanying drawing, the EGR channel design that the embodiment of the present invention is provided is described in detail.
The embodiment of the present invention provides a kind of EGR channel design, and the inside of this EGR channel design forms the first cavity and second cavity of vertical arrangement, between the first cavity and the second cavity, is communicated with.One end of vicinity first cavity of EGR channel design is connected with engine cylinder cover.The inside of this EGR channel design is also provided with gas-entered passageway, gas-entered passageway is respectively with the second cavity be arranged at the inblock cylinder air flue that engine cylinder covers and be connected, the inlet cylinder that the first cavity covers with engine cylinder is connected, so that the waste gas of discharging in inblock cylinder air flue enters the second cavity through gas-entered passageway, then enter inlet cylinder through the first cavity.
By this EGR channel design is arranged to engine cylinder, cover, relatively existing pipe-line system and pipeline, can not be subject to the restriction of space layout on the one hand, easy to use; On the other hand, waste gas can directly enter EGR channel design from engine cylinder cover, and air inlet is more reasonable.This EGR channel design adopts cavity structure, have simple in structure, volume is little, lightweight, low cost and other advantages.
Preferably, the first cavity can be connected by air outlet hole with inlet cylinder, air outlet hole is two or more, two or more air outlet holes respectively be arranged at each inlet cylinder that engine cylinder covers and be connected, thereby the waste gas in EGR channel design is delivered to respectively in each cylinder, the discharge of engine exhaust and Economy are not fully exerted.
This EGR channel design can realize by various structures, in embodiments of the present invention, adopt the structure of cover plate and pad to realize, below in conjunction with the EGR channel design of Fig. 1,2,3,4 pairs of embodiment of the present invention, be elaborated, wherein the arrow in accompanying drawing represents the direction of exhaust-gas flow.
As shown in Figure 1, EGR channel design comprises: lower cover plate 1, lower cover plate pad 2, upper cover plate 3 and upper cover plate pad 4, lower cover plate 1, lower cover plate pad 2, upper cover plate 3 and upper cover plate pad 4 are linked in sequence and are integrated from top to bottom.Preferably, can lower cover plate 1, lower cover plate pad 2, upper cover plate 3 and upper cover plate pad 4 be fixedly connected with by fixing bolt 7.
Shown in Fig. 2, lower cover plate 1 is and covers shape, is provided with the first groove 11 and the second groove 12 on lower cover plate 1, the first groove 11 and the second groove 12 are the inverted U groove that Open Side Down, the second groove 12 is elongated, and along the axial setting of lower cover plate 1, the first groove 11 is communicated with the second groove 12.
Lower cover plate pad 2 is for the second groove 12 on shutoff lower cover plate, and the position that is provided with the first through hole 21, the first through holes 21 on lower cover plate pad 2 is corresponding with the position of the first groove 11 on lower cover plate 1.
The position of the first groove 11 that is provided with the position of the second through hole 31 and the 3rd groove 32, the second through holes 31 and the first through hole 21 of lower cover plate pad 2 and lower cover plate 1 on upper cover plate 3 is corresponding.The U-shaped groove that the 3rd groove 32 is opening upwards, and the 3rd groove 32 is elongated, and along the axial setting of upper cover plate 3, the position of the 3rd groove 32 is corresponding with the position of the second groove 12.
Preferably, EGR channel design can adopt die casting mode to manufacture, and for example, by die casting, casts out lower cover plate 1 and upper cover plate 3, and processing technology is simple, and cost is low.
EGR channel design is connected by upper cover plate pad 4 with engine cylinder cover 6, described two or more air outlet hole 42 is arranged on upper cover plate pad 4, and on upper cover plate pad 4, be provided with third through-hole 41, the position of third through-hole 41 is corresponding with the position of the second through hole 31 of upper cover plate 3, also with the first through hole 21 of lower cover plate pad 2, and the position of the first groove 11 of lower cover plate 1 is to correspondence.
Shown in Fig. 4, after utilizing fixing bolt 7 that lower cover plate 1, lower cover plate pad 2, upper cover plate 3 and upper cover plate pad 4 are sequentially fixedly connected with from top to bottom, lower cover plate pad 2 is arranged at the below of lower cover plate 1, lower cover plate pad 2 can be by the opening sealing of the first groove 11 of lower cover plate 1 and the second groove 12, thereby form the second cavity b, lower cover plate pad 2 coordinates formation the second cavity b with the first groove 11 and the second groove 12.
Below in conjunction with Fig. 5, the intake duct of EGR channel design is elaborated.Fig. 5 is the structure enlarged view of C part in Fig. 4, as shown in Figure 5, after utilizing fixing bolt 7 that lower cover plate 1, lower cover plate pad 2, upper cover plate 3 and upper cover plate pad 4 are sequentially fixedly connected with from top to bottom, third through-hole 41, the second through hole 31 and the first through hole 21 form gas-entered passageway 5, and gas-entered passageway 5 is connected with the second cavity b by the first groove 11.The one end that is gas-entered passageway 5 is communicated with the first groove 11, and then is connected with the second cavity b, and the other end of gas-entered passageway 5 is connected with the inblock cylinder air flue 61 on engine cylinder cover 6, in order to the waste gas in inblock cylinder air flue 61 is delivered in EGR channel design.
As shown in Figure 2, the first pore 22 is arranged on lower cover plate pad 2, and the first pore 22 is through hole, between the first cavity c and the second cavity b, can be communicated with by the first pore 22.The first pore 22 can be set to one or more, preferred, is set to multiple.The size of the first pore 22 and determining positions the waste gas uniformity that enters each inlet cylinder, the size of the first pore 22 and position are subject to the impact of fluid characteristics, can determine according to the demand of motor in practice, the model difference of motor, the size of the first pore 22 is different with position, and the size of the first pore 22 and position can utilize fluid software CFD to calculate conventionally.
Referring to Fig. 4 and 6, Fig. 6, be the structure enlarged view of B part in Fig. 4, as shown in the figure, EGR channel design is connected with engine cylinder cover by upper cover plate pad 4, and the junction surface of EGR channel design and engine cylinder cover is upper cover plate pad 4.On upper cover plate pad 4, be provided with air outlet hole 42, air outlet hole 42 is through hole, and its quantity is two or more.Preferably, air outlet hole 42 is uniformly distributed on upper cover plate pad 4.
The bottom of the 3rd groove 32 is provided with the second pore 33, the second pores 33, and to run through the position of upper cover plate 3, the second pores 33 corresponding with the position of the air outlet hole 42 on upper cover plate pad 4, and the quantity of the second pore 33 is two or more.
On engine cylinder cover 6, being provided with two or more the 3rd pore 62, the three pores 62 is connected with each inlet cylinder 63.The 3rd pore 62 on air outlet hole 42 on upper cover plate pad 4 and engine cylinder cover 6 is connected, the first cavity c is connected by air outlet hole 42, the second pore 33 and the 3rd pore 62 with inlet cylinder 63, in order to the waste gas in EGR channel design is delivered to each inlet cylinder 63.
By the layout of the second pore 33 and air outlet hole 42, solved exactly EGR waste gas and entered the homogeneity question of each cylinder, guarantee the uniformity that EGR leads, thereby the discharge of motor and Economy be not fully exerted, and with low cost.
In the EGR of embodiment of the present invention channel design, between lower cover plate 1 and upper cover plate 3, by metal lower cover plate pad 2, seal, between upper cover plate 3 and engine cylinder cover 6, by metal upper cover plate pad 4, seal.By the first through hole 21 being set on lower cover plate pad 2, the second through hole 31 is set on lower cover plate pad 2, third through-hole 41 being set on upper cover plate pad 4, thereby form gas-entered passageway 5, and be connected with the inblock cylinder air flue in cylinder head 6, in order to the waste gas that cylinder is discharged, introduce EGR channel design.
The first pore 22 is reasonably set on lower cover plate pad 2, the waste gas that makes to enter the second cavity b that lower cover plate 1 and lower cover plate pad 2 form can enter the first cavity c that upper cover plate 3 and upper cover plate pad 4 form from suitable position, again by the second pore 33 on upper cover plate 3, the 3rd pore 63 in air outlet hole 42 and cylinder head 6 on upper cover plate pad 4, enter respectively each inlet cylinder, thereby complete the recirculation of EGR waste gas.
The embodiment of the present invention also provides a kind of egr system, comprising: motor and foregoing EGR channel design, described EGR channel design is arranged on the cylinder cap of described motor.
Be understandable that, above mode of execution is only used to principle of the present invention is described and the illustrative embodiments that adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (7)
1. an EGR channel design, is characterized in that, the inside of described EGR channel design forms the first cavity and second cavity of vertical arrangement, between the first cavity and the second cavity, is communicated with;
One end of vicinity first cavity of described EGR channel design is connected with engine cylinder cover;
The inside of described EGR channel design is also provided with gas-entered passageway, gas-entered passageway is respectively with the second cavity be arranged at the inblock cylinder air flue that engine cylinder covers and be connected, the inlet cylinder that the first cavity covers with engine cylinder is connected, so that the waste gas of discharging in inblock cylinder air flue enters the second cavity through gas-entered passageway, then enter inlet cylinder through the first cavity.
2. EGR channel design as claimed in claim 1, it is characterized in that, the first cavity is connected by air outlet hole with inlet cylinder, described air outlet hole is two or more, two or more described air outlet holes respectively be arranged at each inlet cylinder that described engine cylinder covers and be connected.
3. EGR channel design as claimed in claim 2, is characterized in that, described EGR channel design comprises: lower cover plate, lower cover plate pad, upper cover plate and upper cover plate pad, and lower cover plate, lower cover plate pad, upper cover plate and upper cover plate pad are linked in sequence from top to bottom;
On lower cover plate, be provided with the second groove of the first groove and long strip, the first groove is communicated with the second groove, and lower cover plate pad is provided with the first through hole on the position corresponding with the first groove; The second groove fit of lower cover plate pad and lower cover plate forms described the second cavity;
On upper cover plate, be provided with the 3rd groove of the second through hole and long strip, the position of the second through hole is corresponding with the position of the first through hole and the first groove, the position of the 3rd groove is corresponding with the position of the second groove, and the 3rd groove coordinates formation the first cavity with lower cover plate pad;
On lower cover plate pad, be also provided with the first pore, the first cavity is communicated with by the first pore with the second cavity;
EGR channel design is connected by upper cover plate pad with engine cylinder cover, and described two or more air outlet holes are arranged on upper cover plate pad, and is provided with third through-hole on the upper cover plate pad position corresponding with the second through hole; When lower cover plate, lower cover plate pad, upper cover plate and upper cover plate pad are linked in sequence from top to bottom, third through-hole, the second through hole and the first through hole form described gas-entered passageway, and described gas-entered passageway is connected with the second cavity by the first groove.
4. EGR channel design as claimed in claim 3, is characterized in that, described two or more air outlet holes are uniformly distributed on described upper cover plate pad.
5. EGR channel design as claimed in claim 3, it is characterized in that, the bottom of the 3rd groove on described upper cover plate is provided with two or more the second pores, and described the second pore runs through described upper cover plate, and the position of the second pore is corresponding with the position of the air outlet hole on upper cover plate pad.
6. EGR channel design as claimed in claim 5, it is characterized in that, described engine cylinder covers and is provided with the 3rd pore being connected with described each inlet cylinder, described air outlet hole and the 3rd pore are connected, and the first cavity is connected by described air outlet hole, the second pore and the 3rd pore with inlet cylinder.
7. an egr system, is characterized in that, comprising: motor and the EGR channel design as described in claim 1-6 any one, described EGR channel design is arranged on the cylinder cap of described motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038401.6A CN103742303B (en) | 2014-01-26 | 2014-01-26 | A kind of EGR channel structure and egr system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038401.6A CN103742303B (en) | 2014-01-26 | 2014-01-26 | A kind of EGR channel structure and egr system |
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| Publication Number | Publication Date |
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| CN103742303A true CN103742303A (en) | 2014-04-23 |
| CN103742303B CN103742303B (en) | 2016-01-27 |
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| CN108644037A (en) * | 2018-04-19 | 2018-10-12 | 浙江吉利控股集团有限公司 | EGR air inlet tracks |
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|---|---|---|---|---|
| FR2655382A1 (en) * | 1989-12-04 | 1991-06-07 | Peugeot | Device for introducing additional gas, such as air, into an internal combustion engine, and engine equipped with such a device |
| JP2000192860A (en) * | 1998-12-25 | 2000-07-11 | Aisan Ind Co Ltd | Distribution pipe of exhaust gas recirculation system |
| JP2001123901A (en) * | 1999-10-21 | 2001-05-08 | Hitachi Chem Co Ltd | Intake manifold and method of manufacturing it |
| US20050076892A1 (en) * | 2003-10-10 | 2005-04-14 | Nissan Motor Co., Ltd. | Intake device for internal combustion engine |
| CN202468044U (en) * | 2011-12-29 | 2012-10-03 | 上汽通用五菱汽车股份有限公司 | Small gasoline engine cylinder cover |
| CN202789204U (en) * | 2012-07-16 | 2013-03-13 | 奇瑞汽车股份有限公司 | Integrated EGR (exhaust gas recirculation) channel structure |
| CN203239471U (en) * | 2012-06-05 | 2013-10-16 | 奇瑞汽车股份有限公司 | EGR (exhaust gas recirculation) channel |
-
2014
- 2014-01-26 CN CN201410038401.6A patent/CN103742303B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2655382A1 (en) * | 1989-12-04 | 1991-06-07 | Peugeot | Device for introducing additional gas, such as air, into an internal combustion engine, and engine equipped with such a device |
| JP2000192860A (en) * | 1998-12-25 | 2000-07-11 | Aisan Ind Co Ltd | Distribution pipe of exhaust gas recirculation system |
| JP2001123901A (en) * | 1999-10-21 | 2001-05-08 | Hitachi Chem Co Ltd | Intake manifold and method of manufacturing it |
| US20050076892A1 (en) * | 2003-10-10 | 2005-04-14 | Nissan Motor Co., Ltd. | Intake device for internal combustion engine |
| CN202468044U (en) * | 2011-12-29 | 2012-10-03 | 上汽通用五菱汽车股份有限公司 | Small gasoline engine cylinder cover |
| CN203239471U (en) * | 2012-06-05 | 2013-10-16 | 奇瑞汽车股份有限公司 | EGR (exhaust gas recirculation) channel |
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