CN213953772U - Air intake manifold of integrated EGR air intake structure and engine comprising same - Google Patents
Air intake manifold of integrated EGR air intake structure and engine comprising same Download PDFInfo
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- CN213953772U CN213953772U CN202023319005.0U CN202023319005U CN213953772U CN 213953772 U CN213953772 U CN 213953772U CN 202023319005 U CN202023319005 U CN 202023319005U CN 213953772 U CN213953772 U CN 213953772U
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Abstract
An intake manifold integrated with an EGR (exhaust gas Recirculation) intake structure and an engine comprising the same. The air intake manifold comprises an air intake manifold body, wherein the air intake manifold body comprises N branch pipes, and N is a positive integer greater than 2; the EGR pressure stabilizing cavity comprises two layers of cavities, wherein the cavity in the second layer is divided into N sub-cavities; the EGR air inlet is positioned in the middle of the first-layer cavity of the EGR pressure stabilizing cavity; EGR gas outlets which are arranged on the cavity wall of each sub-cavity, and each EGR gas outlet is communicated with one branch pipe; after EGR waste gas enters the first-layer cavity through the EGR air inlet, the EGR waste gas flows from the middle of the first-layer cavity to the two ends of the first-layer cavity to form two air flows, the two air flows form N air flows after entering the N sub-cavities of the second-layer cavity, and the N air flows enter the N branch pipes through the EGR air outlets of the N sub-cavities respectively. The utility model provides an intake manifold can improve EGR's the homogeneity that admits air to improve the dynamic behavior and the economic performance of combustion efficiency and engine.
Description
Technical Field
The utility model relates to an engine field, in particular to integrated EGR inlet structure's air intake manifold reaches engine that contains it.
Background
EGR (Exhaust Gas recirculation) refers to returning part of Exhaust Gas discharged from an engine to an intake manifold and Re-entering a combustion chamber together with fresh air, so that the intake uniformity of EGR directly affects the intake uniformity of the intake manifold, and further affects the cycle-change performance of the engine.
However, in the existing intake manifold integrated with the EGR, the intake air of the EGR is arranged at the intake manifold or at two ends, so that the intake uniformity of the EGR is poor. Therefore, how to improve the intake uniformity of EGR, thereby improving the combustion efficiency and the power performance and economic performance of the engine, is a technical problem to be solved in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an integrated EGR inlet structure's air intake manifold reaches engine that contains it to improve EGR's the homogeneity that admits air, thereby improve the dynamic behavior and the economic performance of combustion efficiency and engine.
In order to achieve the above object, an embodiment of the present invention provides an intake manifold of integrated EGR air intake structure, including:
an intake manifold body including N branch pipes, N being a positive integer greater than 2;
the EGR pressure stabilizing cavity comprises two layers of cavities, wherein the cavity in the second layer is divided into N sub-cavities;
the EGR air inlet is positioned in the middle of the first-layer cavity of the EGR pressure stabilizing cavity;
EGR gas outlets which are arranged on the cavity wall of each sub-cavity, and each EGR gas outlet is communicated with one branch pipe;
after EGR waste gas enters the first layer of cavity through the EGR air inlet, the EGR waste gas flows from the middle part of the first layer of cavity to the two ends of the first layer of cavity to form two air flows, the two air flows form N air flows after entering the N sub-cavities of the second layer of cavity, and the N air flows enter the N branch pipes through the EGR air outlets of the N sub-cavities respectively.
The utility model discloses an in the embodiment, the air intake manifold body still includes air intake manifold pressure stabilizing cavity, and the air gets into earlier through air intake manifold pressure stabilizing cavity gets into each branch pipe again.
In an embodiment of the present invention, the housing of the EGR pressure stabilizing cavity is divided into an upper die and a lower die, and the lower die and the intake manifold body are integrally formed.
In an embodiment of the present invention, the cavity of the EGR pressure stabilizing cavity is L-shaped.
In an embodiment of the present invention, a fixing bracket is disposed on the casing of the EGR pressure stabilizing chamber.
The utility model discloses an embodiment in EGR steady voltage intracavity divides into a plurality of subchambers through a plurality of flow distribution plates, the position of flow distribution plate is confirmed according to the air input of each cylinder.
The utility model discloses an embodiment, the position of EGR gas outlet is confirmed according to the air input of each (air) intake valve of cylinder.
The embodiment of the utility model provides a still provide an engine, including any one of the above-mentioned embodiment intake manifold.
By the above the technical scheme provided by the utility model it is visible, the utility model provides an air intake manifold can improve EGR waste gas and fresh air's mixing uniformity to improve the homogeneity of admitting air of each cylinder, improved the dynamic behavior and the economic performance of combustion efficiency and engine effectively.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of an intake manifold of an integrated EGR intake structure provided by an embodiment of the present invention;
FIG. 2 is a rear view of an intake manifold of an integrated EGR intake structure provided by an embodiment of the present invention;
fig. 3 is a left side view of an intake manifold of an integrated EGR intake structure provided by an embodiment of the present invention;
fig. 4 is a top view of an intake manifold of an integrated EGR intake structure according to an embodiment of the present invention.
Description of reference numerals:
1: an intake manifold;
2,3,4,5: a branch pipe;
6: an EGR inlet port;
7: a first layer of chambers;
8: a second layer chamber;
9: fixing a bracket bolt hole;
10: an EGR gas outlet;
11: an upper die of the EGR pressure stabilizing cavity;
12: a lower die of the EGR pressure stabilizing cavity;
13: an intake manifold plenum chamber;
14: and fixing the bracket.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are only used for illustrating the present invention and are not used for limiting the scope of the present invention, and after reading the present invention, the modifications of the various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the appended claims of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The embodiment of the utility model provides an integrated EGR inlet structure's air intake manifold can include:
an intake manifold body including N branch pipes, N being a positive integer greater than 2;
the EGR pressure stabilizing cavity comprises two layers of cavities, wherein the cavity in the second layer is divided into N sub-cavities;
the EGR air inlet is positioned in the middle of the first-layer cavity of the EGR pressure stabilizing cavity;
EGR gas outlets which are arranged on the cavity wall of each sub-cavity, and each EGR gas outlet is communicated with one branch pipe;
after EGR waste gas enters the first layer of cavity through the EGR air inlet, the EGR waste gas flows from the middle part of the first layer of cavity to the two ends of the first layer of cavity to form two air flows, the two air flows form N air flows after entering the N sub-cavities of the second layer of cavity, and the N air flows enter the N branch pipes through the EGR air outlets of the N sub-cavities respectively.
The intake manifold body adopts the middle air inlet scheme, namely air enters the intake manifold body through the intake manifold, so that the forward or backward air inlet pipeline of the whole vehicle can be connected conveniently. The air throttle can be connected on the air inlet bend, and the air inlet bend is connected with the air inlet main pipe, can be according to the demand of the direction of admitting air of motorcycle type and the design boundary of whole car, the direction and the size of the elbow that admits air of adjustment to reach air intake manifold and different motorcycle types assorted mesh.
The EGR pressure stabilizing cavity is used for enabling EGR waste gas to form a stable state in the EGR pressure stabilizing cavity, and then distributing gas to each cylinder to achieve air inlet uniformity. Specifically, the chamber of the second layer may be divided into a plurality of sub-chambers by a plurality of dividing plates, and the positions of the dividing plates may be determined according to the intake air amounts of the respective cylinders. The EGR pressure stabilizing cavity can be arranged behind the pressure stabilizing cavity of the intake manifold, and compared with the EGR pressure stabilizing cavity arranged in front of a throttle valve, the EGR pressure stabilizing cavity has larger vacuum degree because the intake manifold has larger pressure difference of EGR air inlet, thereby being beneficial to the EGR air inlet. Further, the position of the EGR gas outlet port may be determined based on the intake air amount of each intake valve of the cylinder. For example, if the intake air amount of a certain intake valve is smaller, the horizontal position of the EGR gas outlet can be close to the intake valve, so that the intake uniformity of each intake valve of the cylinder can be ensured.
Specifically, the shell of the EGR pressure stabilizing cavity is divided into an upper die and a lower die, the lower die and the intake manifold body are integrally formed, namely the lower die and the intake manifold body are integrated together to be opened, and the upper die is opened alone to be formed, so that the number of dies of the intake manifold can be reduced, and the die opening cost is reduced.
Specifically, the cavity of the EGR pressure stabilizing cavity is L-shaped, so that the air inlet mode that EGR waste gas is divided into a plurality of air flows is facilitated, and the installation requirement of the EGR valve is met. However, this also results in large vibration after installation, and therefore, in order to reduce vibration and increase modal frequency, a fixing bracket needs to be provided on the housing of the EGR pressure stabilizing cavity, and the fixing bracket can be installed at the rear end of the EGR pressure stabilizing cavity.
The embodiment of the utility model provides a still provide an engine, including aforementioned intake manifold.
The technical solution of the present invention is further described below by a specific embodiment.
Referring to FIG. 1, a front view of an intake manifold of an integrated EGR intake structure is shown. The intake manifold body comprises an intake manifold 1, a branch pipe 2 communicated with a first cylinder, a branch pipe 3 communicated with a second cylinder, a branch pipe 4 communicated with a third cylinder and a branch pipe 5 communicated with a fourth cylinder.
The EGR plenum comprises a first layer of chambers 7 and a second layer of chambers 8, wherein the second layer of chambers 8 comprises four sub-chambers. The EGR inlet 6 is located in the middle of the first-stage chamber 7. As can be seen from fig. 1, the EGR intake air adopts a structure of 1 minute 2 and 2 minutes 4, specifically, EGR exhaust gas flows from the middle part of the first-layer chamber 7 to the two ends to form 2 air flows, after the 2 air flows enter 4 sub-chambers of the second-layer chamber 8, 4 air flows are formed, the 4 air flows respectively enter 4 branch pipes through the EGR air outlets 10 of the 4 sub-chambers, and finally the EGR exhaust gas is mixed with air in the branch pipes.
In addition, in the four-valve engine of this embodiment, the intake valve is divided into the left and right intake valves for the four-valve combustion chamber, and in order to ensure the intake uniformity of the left and right intake valves, the horizontal position of the EGR intake port 6 may be adjusted, thereby improving the intake uniformity of the left and right intake valves of the same cylinder. For example, if the intake air amount of a certain intake valve is small, the horizontal position of the EGR outlet port may be made closer to the intake valve.
Referring to fig. 2 and 4, since the EGR pressure stabilizing chamber is of an L-shaped structure in this embodiment, a fixing bracket bolt hole 9 is further provided at the rear end of the EGR pressure stabilizing chamber to fix the fixing bracket 14.
Referring to fig. 3, the lower die 12 of the EGR plenum is integrally formed with the intake manifold body, that is, the lower die 12 and the intake manifold body are integrated together and are opened, and the upper die 11 is opened separately.
The above embodiments in the present specification are all described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment is described with emphasis on being different from other embodiments.
The above description is only a few embodiments of the present invention, and although the embodiments of the present invention are disclosed as above, the above description is only for the convenience of understanding the technical solution of the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An intake manifold of an integrated EGR intake structure, comprising:
an intake manifold body including N branch pipes, N being a positive integer greater than 2;
the EGR pressure stabilizing cavity comprises two layers of cavities, wherein the cavity in the second layer is divided into N sub-cavities;
the EGR air inlet is positioned in the middle of the first-layer cavity of the EGR pressure stabilizing cavity;
EGR gas outlets which are arranged on the cavity wall of each sub-cavity, and each EGR gas outlet is communicated with one branch pipe;
after EGR waste gas enters the first layer of cavity through the EGR air inlet, the EGR waste gas flows from the middle part of the first layer of cavity to the two ends of the first layer of cavity to form two air flows, the two air flows form N air flows after entering the N sub-cavities of the second layer of cavity, and the N air flows enter the N branch pipes through the EGR air outlets of the N sub-cavities respectively.
2. The intake manifold of claim 1, wherein the intake manifold body further comprises an intake manifold plenum, air entering the intake manifold plenum through an intake manifold and then entering each of the branch tubes.
3. The intake manifold of claim 1, wherein the housing of the EGR plenum is divided into an upper die and a lower die, the lower die being integrally formed with the intake manifold body.
4. The intake manifold of claim 1, wherein the cavity of the EGR plenum is L-shaped.
5. The intake manifold of claim 1, wherein a stationary bracket is disposed on the housing of the EGR plenum.
6. The intake manifold according to claim 1, wherein in the EGR surge chamber, a plurality of sub-chambers are divided by a plurality of flow dividing plates, and the position of the flow dividing plate is determined in accordance with an intake air amount of each cylinder.
7. The intake manifold according to claim 1 wherein the position of the EGR gas outlet port is determined based on the intake air amount of each intake valve of the cylinder.
8. An engine comprising the intake manifold of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023319005.0U CN213953772U (en) | 2020-12-31 | 2020-12-31 | Air intake manifold of integrated EGR air intake structure and engine comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023319005.0U CN213953772U (en) | 2020-12-31 | 2020-12-31 | Air intake manifold of integrated EGR air intake structure and engine comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213953772U true CN213953772U (en) | 2021-08-13 |
Family
ID=77197416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023319005.0U Active CN213953772U (en) | 2020-12-31 | 2020-12-31 | Air intake manifold of integrated EGR air intake structure and engine comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213953772U (en) |
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2020
- 2020-12-31 CN CN202023319005.0U patent/CN213953772U/en active Active
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