CN207761834U - A kind of engine exhaust-gas recirculating system - Google Patents
A kind of engine exhaust-gas recirculating system Download PDFInfo
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- CN207761834U CN207761834U CN201721917927.7U CN201721917927U CN207761834U CN 207761834 U CN207761834 U CN 207761834U CN 201721917927 U CN201721917927 U CN 201721917927U CN 207761834 U CN207761834 U CN 207761834U
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Abstract
This application discloses a kind of engine exhaust-gas recirculating systems, including engine, EGR line and EGR mixer, the EGR line is connected to the partial cylinders of the engine, the EGR mixer is set on the EGR line, further include the gas collecting apparatus being set on the EGR line, the inlet communication of the outlet and the EGR mixer of the gas collecting apparatus.The exhaust gas being discharged from the partial cylinders of engine is introduced into gas collecting apparatus, and each cylinder exhaust gas first carries out gas collection buffering in gas collecting apparatus, is entered back into EGR mixer and is entered each cylinder after being mixed with fresh air.Since each cylinder exhaust gas is before entering EGR mixer, first passes through gas collecting apparatus and carry out gas collection buffering so that mix waste gas ingredient and the flow for returning to each cylinder are essentially identical, to realize evenly distributing for each cylinder EGR rate of engine.
Description
Technical field
The utility model is related to technical field of engines, more particularly to a kind of engine exhaust-gas recirculating system.
Background technology
Engine exhaust-gas recirculating system is for the exhaust gas after engine combustion to be reintroduced back in cylinder so that
A large amount of inert gases hinder the quick progress of burning, and ignition temperature is made to reduce, to realize nitrogen oxidation in emissions from engines
The reduction of object concentration.
The exhaust outlet of engine is connected to by engine exhaust-gas recirculating system by EGR line with air inlet, engine
Exhaust gas returns to engine through EGR line successively.In order to ensure that complete machine EGR rate is horizontal, existing engine exhaust-gas recirculating system
The exhaust of the partial cylinders of engine is fully incorporated in EGR line, but due to port timing, each cylinder EGR rate distribution
It is uneven.
In conclusion how to solve the problems, such as that each cylinder EGR rate distribution of engine is non-uniform, become those skilled in the art
Urgent problem to be solved.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of engine exhaust-gas recirculating system, started with realizing
Each cylinder EGR rate of machine is evenly distributed.
In order to achieve the above objectives, the utility model provides following technical scheme：
A kind of engine exhaust-gas recirculating system, including engine, EGR line and EGR mixer, the EGR line with
The partial cylinders of the engine are connected to, and the EGR mixer is set on the EGR line, further includes being set to the EGR
Gas collecting apparatus on pipeline, the inlet communication of the outlet and the EGR mixer of the gas collecting apparatus.
Preferably, in above-mentioned engine exhaust-gas recirculating system, the gas collecting apparatus includes：
Cylinder, is air collecting chamber in the cylinder, and the both ends of the cylinder are respectively arranged with air inlet pipe and an air outlet pipe, it is described into
Tracheae is connected to the EGR line, the inlet communication of the escape pipe and the EGR mixer；
The multiple buffering deflectors being set in the air collecting chamber.
Preferably, in above-mentioned engine exhaust-gas recirculating system, the interlaced arrangement of the buffering deflector, and institute
Axis of the plate face perpendicular to the cylinder for stating buffering deflector, forms the air guide runner of reciprocating and turning-back structure.
Preferably, in above-mentioned engine exhaust-gas recirculating system, the cylinder is circular cylinder body or rectangular cylinder.
Preferably, in above-mentioned engine exhaust-gas recirculating system, the escape pipe of the gas collecting apparatus is provided with undergauge
Section.
Compared with prior art, the utility model has the beneficial effects that：
In engine exhaust-gas recirculating system provided by the utility model, in the EGR pipe of the partial cylinders of connection engine
Road setting gas collecting apparatus, the exhaust gas being discharged from the partial cylinders of engine are introduced into gas collecting apparatus, and each cylinder exhaust gas exists
Gas collection buffering is first carried out in gas collecting apparatus, is entered back into EGR mixer and is entered each cylinder after being mixed with fresh air.Since each cylinder is useless
Gas enter EGR mixer before, first pass through gas collecting apparatus carry out gas collection buffering so that return each cylinder mix waste gas ingredient and
Flow is essentially identical, to realize evenly distributing for each cylinder EGR rate of engine.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is that a kind of structure of the gas collecting apparatus for engine exhaust-gas recirculating system that the utility model embodiment provides is shown
It is intended to；
Fig. 2 is a kind of structural schematic diagram of another angle for gas collecting apparatus that the utility model embodiment provides.
Wherein, 1 be cylinder, 2 be air inlet pipe, 3 be exhaust pipe, 4 be undergauge section, 5 be buffering deflector.
Specific implementation mode
There is provided a kind of engine exhaust-gas recirculating systems for the core of the utility model, realize each cylinder EGR of engine
Rate is evenly distributed.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Referring to FIG. 1, the utility model embodiment provides a kind of engine exhaust-gas recirculating system, including engine,
EGR line, EGR mixer and gas collecting apparatus, wherein EGR line is connected to the partial cylinders of engine, the cylinder of engine
Quantity is M, then EGR line takes gas, 2≤N ＜ M, EGR mixer to be set on EGR line from wherein N number of cylinder, gas collection
Device is set on EGR line, and the outlet of gas collecting apparatus and the inlet communication of EGR mixer, the outlet of EGR mixer pass through
EGR line is connected to the air inlet of engine.
The operation principle of the engine exhaust-gas recirculating system is：The exhaust gas being discharged from the partial cylinders of engine is first
Into in gas collecting apparatus, each cylinder exhaust gas first carries out gas collection buffering in gas collecting apparatus, enter back into EGR mixer with fresh air
Enter each cylinder after mixing.Since each cylinder exhaust gas is before entering EGR mixer, first passes through gas collecting apparatus and carry out gas collection buffering, subtract
Weak flowed fluctuation caused by exhaust pulses so that mix waste gas ingredient and the flow for returning to each cylinder are essentially identical, to realize
The evenly distributing of each cylinder EGR rate of engine.
As depicted in figs. 1 and 2, a kind of specific gas collecting apparatus is present embodiments provided comprising cylinder 1 and multiple bufferings
Deflector 5, wherein be air collecting chamber in cylinder 1, the both ends of cylinder 1 are respectively arranged with air inlet pipe 2 and escape pipe 3, air inlet pipe 2 with
EGR line takes gas section to be connected to, and escape pipe 3 is connected to EGR mixer；Buffering deflector 5 is set in air collecting chamber.
When work, exhaust gas, exhaust gas is taken to be introduced into the air collecting chamber of cylinder 1 from the partial cylinders of engine by EGR line
In, exhaust gas reduces exhaust pulses under the buffering guide functions of buffering deflector 5, makes to enter the exhaust gas speed in EGR mixer
Degree and uniform flow, finally realize evenly distributing for each cylinder EGR rate.
Further, in the present embodiment, 5 interlaced arrangement of deflector is buffered, and the plate face for buffering deflector 5 is vertical
In the axis of cylinder 1, the air guide runner for structure of up and down reciprocatingly turning back is formed.The structure can make exhaust gas flow velocity and flow more equal
It is even.Certainly, buffering deflector 5 can also be other structures, and it is mesh plate, or the plate of buffering deflector 5 such as to buffer deflector 5
Face is parallel to the axis of cylinder 1, forms the air guide runner of front and back reciprocating and turning-back structure.
Specifically, in the present embodiment, cylinder 1 is circular cylinder body or rectangular cylinder.Certainly, cylinder 1 can also be other
The cylinder 1 of cross sectional shape, such as triangle or polygon.
Further, in the present embodiment, the escape pipe 3 of gas collecting apparatus is provided with undergauge section 4, and exhaust gas is in gas collecting apparatus
After carrying out gas collection buffering, EGR mixer is entered back into after the undergauge section 4 of escape pipe 3, exhaust pulses is further reduced and causes
EGR mixer inlet flow rate fluctuation, evenly distributing for each cylinder EGR rate is furthermore achieved.
Each embodiment is described by the way of progressive in this specification, the highlights of each of the examples are with other
The difference of embodiment, just to refer each other for identical similar portion between each embodiment.
The foregoing description of the disclosed embodiments enables professional and technical personnel in the field to realize or use this practicality new
Type.Various modifications to these embodiments will be apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest range consistent with features of novelty.
Claims (5)
1. a kind of engine exhaust-gas recirculating system, including engine, EGR line and EGR mixer, the EGR line and institute
The partial cylinders connection of engine is stated, the EGR mixer is set on the EGR line, which is characterized in that further includes setting
Gas collecting apparatus on the EGR line, the inlet communication of the outlet and the EGR mixer of the gas collecting apparatus.
2. engine exhaust-gas recirculating system according to claim 1, which is characterized in that the gas collecting apparatus includes：
Cylinder, the interior cylinder is air collecting chamber, and the both ends of the cylinder are respectively arranged with air inlet pipe and an air outlet pipe, the air inlet pipe
It is connected to the EGR line, the inlet communication of the escape pipe and the EGR mixer；
The multiple buffering deflectors being set in the air collecting chamber.
3. engine exhaust-gas recirculating system according to claim 2, which is characterized in that the buffering deflector is mutually handed over
Mistake arrangement, and the plate face of the buffering deflector forms the air guide runner of reciprocating and turning-back structure perpendicular to the axis of the cylinder.
4. engine exhaust-gas recirculating system according to claim 2, which is characterized in that the cylinder be circular cylinder body or
Rectangular cylinder.
5. engine exhaust-gas recirculating system according to claim 1, which is characterized in that the escape pipe of the gas collecting apparatus
It is provided with undergauge section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721917927.7U CN207761834U (en) | 2017-12-28 | 2017-12-28 | A kind of engine exhaust-gas recirculating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721917927.7U CN207761834U (en) | 2017-12-28 | 2017-12-28 | A kind of engine exhaust-gas recirculating system |
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| Publication Number | Publication Date |
|---|---|
| CN207761834U true CN207761834U (en) | 2018-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721917927.7U Active CN207761834U (en) | 2017-12-28 | 2017-12-28 | A kind of engine exhaust-gas recirculating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005816A (en) * | 2017-12-28 | 2018-05-08 | 潍柴动力股份有限公司 | A kind of engine exhaust-gas recirculating system |
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2017
- 2017-12-28 CN CN201721917927.7U patent/CN207761834U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005816A (en) * | 2017-12-28 | 2018-05-08 | 潍柴动力股份有限公司 | A kind of engine exhaust-gas recirculating system |
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