CN218844455U

CN218844455U - Intake manifold of integrated EGR passageway

Info

Publication number: CN218844455U
Application number: CN202223184583.7U
Authority: CN
Inventors: 程浩; 王文杰
Original assignee: Hefei Hengxin Power Technology Co ltd
Current assignee: Hefei Hengxin Power Technology Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-04-11
Anticipated expiration: 2032-11-30

Abstract

The utility model relates to an air intake manifold of integrated EGR passageway, including the manifold main part, set up in four inside air intake branch of manifold main part and set up in the surperficial EGR passageway of manifold main part, the EGR passageway includes main air inlet, distributes the chamber with the one-level of main air inlet intercommunication, sets up in the distribution passageway at one-level distribution chamber both ends, respectively with two second grade distribution chambers of two distribution passageways intercommunication and set up in the EGR branch pipe at second grade distribution chamber both ends. The utility model discloses a set up one-level distribution chamber and second grade distribution chamber and equally divide into four equal parts with waste gas, then directly let in air intake branch, can prevent that fresh air from crossing with waste gas and causing the air current disorder, and then lead to the distribution inequality, the end of giving vent to anger of EGR branch pipe is direct to be linked together with air intake branch's interlude, has avoided mixing uneven phenomenon for the inside fresh air of each air intake branch is the same with the waste gas proportion.

Description

Intake manifold of integrated EGR passageway

Technical Field

The utility model belongs to the air intake manifold field, concretely relates to air intake manifold of integrated EGR passageway.

Background

EGR is a short term for exhaust gas recirculation, and the exhaust gas recirculation refers to that part of exhaust gas discharged by an engine is returned to an intake manifold and enters a cylinder again together with a fresh mixed gas, and because the exhaust gas contains a large amount of polyatomic gases such as CO2, and the gases such as CO2 cannot be combusted but absorb a large amount of heat due to high specific heat capacity, the maximum combustion temperature of the mixed gas in the cylinder is reduced, and the generation amount of NOx is reduced.

The EGR passage needs to be provided with an additional pipeline communicated with the intake manifold, so that the pipeline is complex and is mixed with fresh air to enter the cylinder, but the exhaust gas of the EGR passage and the fresh air just meet in the intake manifold and enter the intake branch pipe, so that uneven mixing is easy to occur, and then the fresh air and the exhaust gas distributed to each branch pipe are different in proportion, thereby further influencing the work of each cylinder body of the engine.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an even, the no external pipeline's of distribution integrated EGR passageway air intake manifold in order to solve above-mentioned problem.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model provides an air intake manifold of integrated EGR passageway, includes the manifold main part, sets up in four inside inlet branch pipes of manifold main part and sets up in the surperficial EGR passageway of manifold main part, the EGR passageway includes main air inlet, the one-level distribution chamber with main air inlet intercommunication, sets up in the distribution passage at one-level distribution chamber both ends, respectively with two second grade distribution chambers of two distribution passage intercommunications and set up in the EGR branch pipe at second grade distribution chamber both ends, wherein, the EGR branch pipe is linked together with the inlet branch pipe that corresponds.

As the utility model discloses a further optimization scheme, the EGR passageway still includes EGR passageway lid, EGR passageway lid is used for the integrated welding of EGR passageway at manifold main part surface for form confined internal cavity.

As a further optimization scheme of the utility model, the one-level distribution chamber is long tubular type, just main air inlet is located the midpoint department in one-level distribution chamber, is convenient for make the even one-half of gas of main air inlet be two.

As a further optimization scheme of the utility model, the second grade distribution chamber is the short cast, just distribution channel is located the mid point department in second grade distribution chamber, is convenient for make the second grade distribution chamber be divided into two with waste gas and lets in the EGR branch pipe.

As the utility model discloses a further optimization scheme, the end of giving vent to anger of EGR branch pipe is linked together with intake manifold's interlude, makes the through intake manifold of the even waste gas of distribution and fresh air mix, has avoided the proportion inhomogeneous.

The beneficial effects of the utility model reside in that:

the utility model discloses a set up one-level distribution chamber and second grade distribution chamber and equally divide into four equal parts with waste gas, then directly let in air intake branch, can prevent that fresh air and waste gas from crossing and causing the air current disorder, and then lead to the distribution inequality, the direct interlude with air intake branch of the end of giving vent to anger of EGR branch pipe is linked together, has avoided mixing uneven phenomenon for each air intake branch inside fresh air is the same with the waste gas proportion.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the EGR path of the present invention.

In the figure: 1. a manifold body; 2. an EGR passage; 3. an EGR passage cover; 4. an intake branch pipe; 2.1, a main air inlet; 2.2, a primary distribution cavity; 2.3, distributing channels; 2.4, a secondary distribution cavity; 2.5 EGR branch pipe.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Example 1

As shown in fig. 1-2, an intake manifold integrating an EGR passage comprises a manifold body 1, four intake branch pipes 4 disposed inside the manifold body 1, and a surface EGR passage 2 disposed on the manifold body 1, the EGR passage 2 includes a main intake port 2.1, a primary distribution chamber 2.2 communicated with the main intake port 2.1, distribution passages 2.3 disposed at both ends of the primary distribution chamber 2.2, two secondary distribution chambers 2.4 respectively communicated with the two distribution passages 2.3, and EGR branch pipes 2.5 disposed at both ends of the secondary distribution chamber 2.4, wherein the EGR branch pipes 2.5 are communicated with the corresponding intake branch pipes 4.

Manifold body 1's effect is in every air intake branch 4 with fresh air evenly distributed, then by air intake branch 4 leading-in engine cylinder block that corresponds, when mixing waste gas, in order to avoid waste gas and fresh air to mix inhomogeneous, results in the fresh air in each air intake branch 4 and the proportion of waste gas different, this application is equallyd divide into four equal parts earlier with waste gas through setting up the EGR passageway, then directly lets in air intake branch 4 for the inside fresh air of each air intake branch 4 is the same with the waste gas proportion.

In order to evenly divide the waste gas into four equal parts, the primary distribution cavity 2.2 is long-pipe type, the main air inlet 2.1 is positioned at the midpoint of the primary distribution cavity 2.2, the secondary distribution cavity 2.4 is short-pipe type, and the distribution channel 2.3 is positioned at the midpoint of the secondary distribution cavity 2.4, the arrangement enables the waste gas in the main air inlet 2.1 to be evenly distributed to two ends of the primary distribution cavity 2.2 and then evenly enter the secondary distribution cavity 2.4, and then the total amount of the waste gas obtained by the four EGR branch pipes is the same after the waste gas is evenly distributed.

In order to prevent the fresh air from being mixed with the waste gas to cause airflow disorder and further cause uneven distribution, the air outlet end of the EGR branch pipe 2.5 is directly communicated with the middle section of the air inlet branch pipe 4, and the phenomenon of uneven mixing is avoided.

In order to reduce the complexity of external piping, the EGR passage 2 is integrally welded to the inside of the manifold body 1, the EGR passage 2 is further provided with an EGR passage cover 3, and the EGR passage cover 3 is used to integrally weld the EGR passage 2 to the surface of the manifold body 1.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. An intake manifold integrated with an EGR passage, comprising a manifold main body (1), four intake branch pipes (4) arranged inside the manifold main body (1), and a surface EGR passage (2) arranged in the manifold main body (1), characterized in that: EGR passageway (2) include main air inlet (2.1), the first grade distribution chamber (2.2) with main air inlet (2.1) intercommunication, set up in distribution passageway (2.3) at first grade distribution chamber (2.2) both ends, respectively with two second grade distribution chambers (2.4) of two distribution passageway (2.3) intercommunications and set up in EGR branch pipe (2.5) at second grade distribution chamber (2.4) both ends, wherein, EGR branch pipe (2.5) are linked together with corresponding air intake branch pipe (4).

2. The intake manifold of an integrated EGR passage according to claim 1, wherein: the EGR passage (2) further comprises an EGR passage cover (3), and the EGR passage cover (3) is used for integrally welding the EGR passage (2) on the surface of the manifold body (1).

3. The intake manifold of an integrated EGR passage according to claim 1, wherein: the primary distribution cavity (2.2) is long-tube-shaped, and the main air inlet (2.1) is positioned at the midpoint of the primary distribution cavity (2.2).

4. The intake manifold of an integrated EGR passage according to claim 1, wherein: the secondary distribution cavity (2.4) is of a short tube type, and the distribution channel (2.3) is located at the midpoint of the secondary distribution cavity (2.4).

5. The intake manifold of an integrated EGR passage according to claim 1, wherein: and the air outlet end of the EGR branch pipe (2.5) is communicated with the middle section of the air inlet branch pipe (4).