CN207945026U - EGR intake elbows and EGR gas handling systems - Google Patents
EGR intake elbows and EGR gas handling systems Download PDFInfo
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- CN207945026U CN207945026U CN201721925000.8U CN201721925000U CN207945026U CN 207945026 U CN207945026 U CN 207945026U CN 201721925000 U CN201721925000 U CN 201721925000U CN 207945026 U CN207945026 U CN 207945026U
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- egr
- intake elbow
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- handling systems
- intake
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Abstract
The utility model is related to EGR intake elbows and EGR gas handling systems, it is integrated with EGR mixer on the intake elbow, one end of the intake elbow is air inlet end, the other end of the intake elbow is gaseous mixture outlet side, the bend loss of the intake elbow is equipped with EGR exhaust air inlet, the bend loss is internally provided with exhaust steam passage and is connected to multiple EGR exhaust gas outlets, EGR exhaust can be discharged via the multiple EGR exhaust gas outlet is being mixed to form mixed gas with fresh air at the bend loss, the mixed gas is expelled to inlet manifold by the gaseous mixture outlet side and enters cylinder.The utility model additionally provides a kind of EGR gas handling systems including above-mentioned intake elbow.The utility model on intake elbow by integrating EGR mixer, it in such a way that EGR exhaust circumferential direction air inlet is mixed into fresh air, had not only solved EGR mixing uniformity requirements, but also has met the structure design compactedness requirement of light duty engine, engine performance is improved, NO is effectively reducedxDischarge.
Description
Technical field
The utility model is related to heavy vehicle accessory technical fields, more particularly to a kind of EGR intake elbows and EGR air inlets
System.
Background technology
EGR refers to exhaust gas recycling, i.e., detaches the part that heel row of burning goes out in gas and introduce air inlet side, make it again
Degree participates in the technology of burning.With the upgrading of discharge, diesel engine NO is reducedxDischarge, the necessity of egr system addition is increasingly
It is high.
In order to meet mixing uniformity requirement of the EGR engine to exhaust gas and fresh air, traditional design method is by lengthening
EGR mixing sections extend EGR incorporation times to realize that it is poroid mixed that the requirement of EGR mixing uniformity or EGR exhaust pipe tail portion increase
Structure or exhaust gas distribution pipe are closed, mixed effect is further strengthened.
It is above-mentioned to realize the mentality of designing of EGR mixing uniformity by lengthening EGR mixing sections, extending EGR incorporation times, although
It disclosure satisfy that mixing uniformity requirement of the EGR engine to exhaust gas and fresh air, but the mentality of designing is to space layout
It is required that it is excessively harsh, longer EGR exhaust pipe and intake elbow cooperation are generally required to meet the requirement of mixing length, thus
Cause that engine charge lateral line is long, difficulty in arrangement, for the type of light duty engine and vehicle space anxiety
Mating difficulty is larger.Simultaneously because the defect of above-mentioned self structure, air-flow collides seriously, causes EGR exhaust intake resistance bigger than normal,
It is unfavorable for the generation of EGR driving pressure differences, influences the realization of EGR rate.
Utility model content
The purpose of this utility model is at least to solve one of drawbacks described above and deficiency, which is by the following technical programs
It realizes.
The utility model provides a kind of intake elbow for EGR gas handling systems, and EGR is integrated on the intake elbow
One end of mixer, the intake elbow is air inlet end, and the other end of the intake elbow is gaseous mixture outlet side, described
The bend loss of intake elbow is equipped with EGR exhaust air inlet, and being internally provided with exhaust steam passage and being connected to multiple EGR for the bend loss is given up
Gas gas outlet, EGR exhaust can via the exhaust steam passage and pass through the multiple EGR exhaust gas outlet discharge and fresh air
It is being mixed to form mixed gas at the bend loss, the mixed gas is expelled to air inlet by the gaseous mixture outlet side
Manifold enters cylinder.
Preferably, the exhaust steam passage along the bend loss inboard wall of tube body circumferentially.
Preferably, the multiple EGR exhaust gas outlet passes through described more along the exhaust steam passage radial arrangement, EGR exhaust
A EGR exhaust gas outlet is discharged and is mixed with the fresh air in different directions.
Preferably, the air inlet end is equipped with flow valve, and the gaseous mixture outlet side is equipped with EGR valve.
Preferably, the intake elbow is pipe or square tube.
Preferably, at least provided with three EGR exhaust gas outlets.
The utility model additionally provides a kind of EGR gas handling systems, including intake elbow, heater and inlet manifold, described
Intake elbow is above-mentioned intake elbow, and the gaseous mixture outlet side is connect with the inlet manifold, and the heater is arranged in institute
State the junction of intake elbow and the inlet manifold.
The advantages of the utility model, is as follows：
(1) EGR exhaust is circumferentially mixed into newly in different directions by the integrated channel on intake elbow in the utility model
In fresh air, by each mixing point position and often locate the adjustment of mixing point circulation area, realizes the equal of exhaust gas and fresh air
Even mixing ensures each cylinder uniformity.
(2) EGR mixer of the utility model can realize multiple spot air inlet, reduce air-flow and collide, reduce EGR exhaust air inlet
Resistance adds EGR exhaust import in low-pressure area, increases exhaust gas and introduce, improve EGR rate.
(2) intake elbow of the utility model itself integrates EGR mixer, has both met the requirement to EGR mixing uniformity,
Design object of the light diesel engine to structural compactness is realized again.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit are common for this field
Technical staff will become clear.Attached drawing only for the purpose of illustrating preferred embodiments, and is not considered as to this practicality
Novel limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.
Fig. 1 is the sectional view for the intake elbow for EGR gas handling systems that the utility model embodiment provides；
Fig. 2 is the top plan view for the intake elbow for EGR gas handling systems that the utility model embodiment provides；
Fig. 3 is the layout drawing for the intake elbow for EGR gas handling systems that the utility model embodiment provides；
Reference numeral is as follows in figure：
10- intake elbow 11- air inlets end
12- gaseous mixture exhaust end 13-EGR waste gas inlets
14- pipe bent position 15- exhaust steam passages
16-EGR exhaust gas outlet 20- heaters
30- inlet manifold
Specific implementation mode
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to be best understood from the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened completely is communicated to those skilled in the art.
Fig. 1 is to Fig. 2 shows the intake elbows for EGR gas handling systems that embodiment according to the present utility model provides
Schematic diagram.As depicted in figs. 1 and 2, EGR intake elbows provided by the utility model are integrating EGR mixing at bend loss
Device, this EGR intake elbows 10 include air inlet end 11, gaseous mixture exhaust end 12 and EGR exhaust air inlet 13, air inlet
End 11 is for being connected to fresh air outside, and gaseous mixture exhaust end 12 is connect with the inlet manifold 30 of engine, EGR exhaust air inlet
The exhaust pipe of 13 connection engines, fresh air lead to after being mixed in intake elbow 10 with the exhaust gas that the exhaust pipe of engine is discharged
It crosses gaseous mixture outlet side 12 and is expelled to inlet manifold 30 into cylinder.
The bend loss 14 in intake elbow 10 is arranged in EGR exhaust air inlet 13, and bend loss 14 is internally provided with exhaust steam passage
15, exhaust steam passage 15 circumferentially, on exhaust steam passage 15 is radially provided with multiple EGR along the inboard wall of tube body of bend loss 14 and gives up
Gas gas outlet 16, EGR exhaust can in different directions be discharged via exhaust steam passage 15 and by multiple EGR exhaust gas outlets 16
With fresh air mixed gas is being mixed to form close to multiple spot at bend loss 14.
Often different, remoter apart from EGR exhaust air inlet 13 EGR exhaust of the flow cross-section areas of place's mixing point EGR exhaust
The flow cross-section areas of gas outlet 16 is bigger, and the flow cross-section areas of the EGR exhaust closer apart from EGR exhaust air inlet 13 is more
It is small.
EGR exhaust gas outlet 16 is at least provided with three, and exhaust gas is by being integrated in the exhaust steam passage 15 of bend loss 14 circumferentially
It is mixed into fresh air with multiple and different directions, by each mixing point position and often locates the adjustment of mixing point circulation area, it can
To realize that exhaust gas is uniformly mixed with fresh air, meet each cylinder EGR rate uniformity requirement.
By making EGR exhaust multiple spot be mixed into fresh air, the air-flow that can reduce exhaust gas and fresh air collides, and reduces
EGR exhaust intake resistance reduces EGR driving pressure difference losses.In addition, according to flow dynamics analysis air-flow since effect of inertia is flowing
When through bend pipe, low-pressure area is will produce on the inside of bend pipe, EGR exhaust air inlet 13 is added on the inside of bend pipe by this characteristic, to useless
The introducing of gas has good " pump gas " effect, helps to realize higher EGR rate.Intake elbow 10 without be arranged it is longer, also without
It need to increase diversion pipe, it is compact-sized, facilitate arrangement.
As shown in Fig. 2, in the present embodiment, bent angle, convenience and phase are formed at air inlet end 11 in intake elbow 10
The parts match answered.In other embodiment, the tube body at air inlet end 11 can all straight tubes or bend pipe, according to tool
Body situation is arranged, and the utility model does not limit specifically.
Intake elbow 10 can be pipe or square tube, and the utility model is not limited to this.
In specific implementation, can flow valve (not shown) be set at the air inlet end 11 of intake elbow 10.Flow valve can
It to detect the fresh air flow entered in intake elbow 10, and is electrically connected with engine controller ECU, so as to according to practical work
Condition controls the inlet of fresh air.
Furthermore it is also possible to which EGR valve (not shown), EGR valve and engine controller are arranged at EGR exhaust air inlet 13
ECU is electrically connected, and by controlling the aperture of EGR valve, can control the inlet of exhaust gas.
In addition, temperature sensor and/or pressure sensor (not shown) can be set at air inlet end 11, it is new to monitor
The temperature and/or pressure of fresh air；Temperature sensor can be set in gaseous mixture exhaust end 12 and/or pressure sensor (does not show
Go out), to monitor the temperature and/or pressure of mixed gas.
This EGR intake elbows are equally applicable to the mixing for having any other two kinds of gases that mixing uniformity requires, this
Utility model repeats no more.
As shown in figure 3, the utility model additionally provides a kind of gas handling system including the EGR intake elbows, including air inlet
Bend pipe 10, heater 20, inlet manifold 30.Gaseous mixture exhaust end 12 is connect with inlet manifold 30, and heater 20 is arranged in air inlet
The junction of bend pipe 10 and inlet manifold 30.Under the premise of meeting EGR mixing uniformity, this air intake system structure is simple, outer
It sees succinctly, is not required to additionally occupy arrangement space, meets the compact feature of light duty engine space layout.
The utility model is mixed into fresh sky by integrating EGR mixer on intake elbow using EGR exhaust circumferential direction air inlet
The mode of gas had not only solved EGR mixing uniformity requirements, but also met the structure design compactedness requirement of light duty engine, simultaneously
Air-flow is reduced by multiple spot air inlet to collide, and lower characteristic is distributed according to bend pipe inside pressure and realizes pump gas, utmostly
Reduction gas inlet resistance, improve each cylinder of engine EGR rate distributing uniformity, improve engine performance, be effectively reduced
Nitrogen oxides (NOx) discharge.
The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not
It is confined to this, any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in
Change or replacement, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should be with
Subject to the scope of the claims.
Claims (7)
1. a kind of intake elbow for EGR gas handling systems, which is characterized in that it is integrated with EGR mixer on the intake elbow,
One end of the intake elbow is air inlet end, and the other end of the intake elbow is gaseous mixture outlet side, and the air inlet is curved
The bend loss of pipe is equipped with EGR exhaust air inlet, and the bend loss is internally provided with exhaust steam passage and is connected to multiple EGR exhaust outlets
Mouthful, EGR exhaust can be discharged with fresh air via the exhaust steam passage and by the multiple EGR exhaust gas outlet close
Be mixed to form mixed gas at the bend loss, the mixed gas by the gaseous mixture outlet side be expelled to inlet manifold into
Enter cylinder.
2. the intake elbow according to claim 1 for EGR gas handling systems, which is characterized in that the exhaust steam passage edge
The inboard wall of tube body of the bend loss is circumferentially.
3. the intake elbow according to claim 2 for EGR gas handling systems, which is characterized in that the multiple EGR exhaust
Gas outlet is discharged along the exhaust steam passage radial arrangement, EGR exhaust by the multiple EGR exhaust gas outlet in different directions
And it is mixed with the fresh air.
4. the intake elbow according to claim 1 for EGR gas handling systems, which is characterized in that the air inlet end
Equipped with flow valve, the gaseous mixture outlet side is equipped with EGR valve.
5. the intake elbow according to any one of claims 1 to 4 for EGR gas handling systems, which is characterized in that institute
It is pipe or square tube to state intake elbow.
6. the intake elbow according to any one of claims 1 to 4 for EGR gas handling systems, which is characterized in that extremely
The EGR exhaust gas outlet there are three setting less.
7. a kind of EGR gas handling systems, including intake elbow, heater and inlet manifold, which is characterized in that the intake elbow is
The intake elbow for EGR gas handling systems according to any one of claims 1 to 6, the gaseous mixture outlet side and
The inlet manifold connection, the heater are arranged in the junction of the intake elbow and the inlet manifold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721925000.8U CN207945026U (en) | 2017-12-29 | 2017-12-29 | EGR intake elbows and EGR gas handling systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721925000.8U CN207945026U (en) | 2017-12-29 | 2017-12-29 | EGR intake elbows and EGR gas handling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207945026U true CN207945026U (en) | 2018-10-09 |
Family
ID=63701408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721925000.8U Active CN207945026U (en) | 2017-12-29 | 2017-12-29 | EGR intake elbows and EGR gas handling systems |
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| Country | Link |
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| CN (1) | CN207945026U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985245A (en) * | 2019-12-20 | 2020-04-10 | 潍柴动力股份有限公司 | Engine and exhaust gas circulation device thereof |
| CN111577494A (en) * | 2020-05-15 | 2020-08-25 | 浙江博弈科技股份有限公司 | Intake manifold with waste gas inlet hole |
| CN111927657A (en) * | 2020-08-11 | 2020-11-13 | 一汽解放汽车有限公司 | Engine air inlet system, structure design method and low-temperature exhaust gas circulation control method |
| CN114233533A (en) * | 2021-12-07 | 2022-03-25 | 重庆小康工业集团股份有限公司 | EGR distributor |
-
2017
- 2017-12-29 CN CN201721925000.8U patent/CN207945026U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985245A (en) * | 2019-12-20 | 2020-04-10 | 潍柴动力股份有限公司 | Engine and exhaust gas circulation device thereof |
| CN111577494A (en) * | 2020-05-15 | 2020-08-25 | 浙江博弈科技股份有限公司 | Intake manifold with waste gas inlet hole |
| CN111577494B (en) * | 2020-05-15 | 2021-06-25 | 浙江博弈科技股份有限公司 | Intake manifold with waste gas inlet hole |
| CN111927657A (en) * | 2020-08-11 | 2020-11-13 | 一汽解放汽车有限公司 | Engine air inlet system, structure design method and low-temperature exhaust gas circulation control method |
| CN114233533A (en) * | 2021-12-07 | 2022-03-25 | 重庆小康工业集团股份有限公司 | EGR distributor |
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