CN217002028U

CN217002028U - Inclined rear-drive exhaust manifold assembly with EGR (exhaust gas recirculation) pipe structure

Info

Publication number: CN217002028U
Application number: CN202221086667.4U
Authority: CN
Inventors: 杨文盼; 夏特; 王德春; 刘侠; 孙晓鹏; 郭家玮; 王刚; 李悦; 刘威; 张荣蓉; 南昌浩
Original assignee: Harbin Dongan Auto Engine Co Ltd
Current assignee: Harbin Dongan Auto Engine Co Ltd
Priority date: 2022-04-30
Filing date: 2022-04-30
Publication date: 2022-07-19
Anticipated expiration: 2032-04-30

Abstract

An inclined rear-drive exhaust manifold assembly with an EGR (exhaust gas recirculation) pipe structure belongs to the technical field of automobile exhaust systems. The arrangement limitation of the exhaust manifold to the cabin space in the longitudinal direction can be reduced, meanwhile, the airflow interference among air passages can be reduced, and the back pressure of an exhaust system is reduced. Three air inlets are sequentially arranged on the front flange along the length direction of the front flange, the first branch pipe, the second branch pipe and the third branch pipe are sequentially communicated with the three air inlets, the first branch pipe and the third branch pipe are communicated with the manifold after being collected, the second branch pipe is communicated with the manifold, an air outlet of the manifold is communicated with an air outlet hole formed in the rear flange, and the air outlet hole of the rear flange is connected with an air outlet system pipeline. The utility model reduces the exhaust interference, adopts the mode of increasing the ternary front gas taking switching guide pipe and designing the ternary front gas taking of the EGR cooler, improves the oil consumption of the whole engine, reduces the occupied space of an exhaust system, has better trend of an exhaust manifold and lower exhaust back pressure, and effectively improves the performance of the engine.

Description

Inclined rear-drive exhaust manifold assembly with EGR (exhaust gas recirculation) pipe structure

Technical Field

The utility model belongs to the technical field of automobile exhaust systems, and particularly relates to an inclined rear-drive exhaust manifold assembly.

Background

At present, stainless steel exhaust manifold assemblies are widely used in automobile exhaust systems and are divided into tightly coupled exhaust manifolds and non-tightly coupled exhaust manifolds. The tightly coupled exhaust manifold occupies a large space, has a large requirement on the boundary of an engine and a cabin, and influences the spatial arrangement of the whole engine; the exhaust manifold in a non-tight coupling state is easy to have the problems of air flow interference and high back pressure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems of large occupied space and airflow disorder of an exhaust manifold, and further provides an inclined rear-drive exhaust manifold assembly with an EGR (exhaust gas recirculation) pipe structure, which can reduce the arrangement limit of the exhaust manifold to the cabin space in the longitudinal direction, reduce airflow interference among air passages and reduce the back pressure of an exhaust system.

The technical scheme adopted by the utility model is as follows: an inclined rear-drive exhaust manifold assembly with an EGR (exhaust gas Recirculation) pipe structure comprises a front flange, a first branch pipe, a second branch pipe, a third branch pipe, a collecting pipe and a rear flange; three inlet ports are sequentially arranged on the front flange along the length direction of the front flange, the first branch pipe, the second branch pipe and the third branch pipe are sequentially communicated with the three inlet ports, the first branch pipe and the third branch pipe are communicated with the manifold after being gathered, the second branch pipe is communicated with the manifold, an exhaust hole formed in the exhaust port of the manifold is communicated with an exhaust hole formed in the rear flange, and the exhaust hole of the rear flange is connected with an exhaust system pipeline.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, the mode of collecting three branch pipes and one main pipe is adopted, so that the airflow interference among the air passages is reduced, and the back pressure of an exhaust system is reduced; the three-element front gas taking switching guide pipe is added, the three-element front gas taking mode of the EGR cooler is designed, the three-element front gas taking switching guide pipe is of a flange structure, the occupied space of an EGR pipeline is reduced, the oil consumption of the whole engine is improved, the occupied space of an exhaust system is reduced, the trend of an exhaust manifold is better, the exhaust back pressure is lower, the arrangement limit of the exhaust manifold to the space of a cabin in the longitudinal direction is reduced, and the performance of the engine is effectively improved.

Drawings

FIG. 1 is an isometric view of the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a schematic illustration of the piping gas flow of the present invention;

FIG. 4 is a schematic view of the structure of an exhaust side air passage of the cylinder cover of the utility model;

wherein: 1. a front flange; 2. a first branch pipe; 3. a second branch pipe; 4. a third branch pipe; 5. a manifold; 6. a ternary advanced gas taking switching conduit; 7. a rear flange; 8. a stud; 9. an oxygen sensor mount; 10. an exhaust system line; 11. EGR system piping.

Detailed Description

For a better understanding of the objects, structure and function of the utility model, reference should be made to the following detailed description taken in conjunction with the accompanying drawings.

Referring to fig. 1 to 3, the inclined rear-drive exhaust manifold assembly with an EGR pipe structure of the present invention includes a front flange 1, a first branch pipe 2, a second branch pipe 3, a third branch pipe 4, a collecting pipe 5 and a rear flange 7; three inlet ports are sequentially arranged on the front flange 1 along the length direction of the front flange, the first branch pipe 2, the second branch pipe 3 and the third branch pipe 4 are sequentially communicated with the three inlet ports, the first branch pipe 2 and the third branch pipe 4 are communicated with the collecting pipe 5 after being collected, the second branch pipe 3 is communicated with the collecting pipe 5, an exhaust port of the collecting pipe 5 is communicated with an exhaust hole formed in the rear flange 7, and the exhaust hole of the rear flange 7 is connected with an exhaust system pipeline 10.

As shown in fig. 4, in the four-cylinder four-stroke engine, the working sequence of one-three-four-two cylinders is adopted, so that the exhaust strokes of the two cylinders and the three cylinders are not adjacent, thereby ensuring that the exhaust gases of the two cylinders and the three cylinders are not interfered with each other after being converged and having sufficient exhaust time, therefore, the exhaust gases of the two cylinders and the three cylinders are gathered to the second branch pipe 3, the exhaust strokes of the one cylinder and the four cylinders are not adjacent, the one cylinder is connected with the first branch pipe 2, the four cylinders are connected with the third branch pipe 4, and the airflow after the first branch pipe 2 and the third branch pipe 4 are gathered is not interfered.

Wherein: the collecting pipe 5 is arranged on one side, close to the third branch pipe 4, of the front flange 1, so that the first branch pipe 2, the second branch pipe 3 and the third branch pipe 4 extend towards one side of the front flange 1 to form an obliquely arranged back-driving exhaust manifold.

The first branch pipe 2 bypasses the second branch pipe 3 and is communicated with a collecting pipe 5.

Considering the clearance fit requirement among all parts on the periphery of the engine exhaust manifold assembly and assembling the engine exhaust manifold assembly into a four-cylinder M16NR development machine type, a three-element front gas taking mode of an EGR cooler is designed, and the overall oil consumption of the engine is improved.

The method specifically comprises the following steps: the three-element advanced gas taking adapter guide pipe 6 is arranged on the rear flange 7, the three-element advanced gas taking adapter guide pipe 6 is attached to the rear flange 7 in a half-wall mode, occupied space is reduced, and the three-element advanced gas taking adapter guide pipe 6 is connected with an EGR cooler through an EGR system pipeline 11. Sufficient design space is provided for the design of the EGR system pipeline.

An oxygen sensor mounting seat 9 is fixed on the upper end face of the collecting pipe 5.

And the rear end of the rear flange 7 is provided with a stud 8.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides a take oblique rear-guard exhaust manifold assembly of EGR tubular construction which characterized in that: comprises a front flange (1), a first branch pipe (2), a second branch pipe (3), a third branch pipe (4), a collecting pipe (5) and a rear flange (7); three inlet ports are sequentially arranged on the front flange (1) along the length direction of the front flange, the first branch pipe (2), the second branch pipe (3) and the third branch pipe (4) are sequentially communicated with the three inlet ports, the first branch pipe (2) and the third branch pipe (4) are communicated with the manifold pipe (5) after being converged, the second branch pipe (3) is communicated with the manifold pipe (5), an exhaust port of the manifold pipe (5) is communicated with an exhaust hole formed in the rear flange (7), and the exhaust hole of the rear flange (7) is connected with an exhaust system pipeline (10).

2. The inclined rear-drive exhaust manifold assembly with the EGR pipe structure as recited in claim 1, wherein: the rear flange (7) is provided with a ternary advanced gas taking adapter guide pipe (6), the ternary advanced gas taking adapter guide pipe (6) is attached to the rear flange (7) in a half-wall mode, and the ternary advanced gas taking adapter guide pipe (6) is connected with an EGR cooler through an EGR system pipeline (11).

3. The inclined rear-drive exhaust manifold assembly with the EGR pipe structure as recited in claim 2, wherein: the collecting pipe (5) is arranged on one side, close to the third branch pipe (4), of the front flange (1), so that the first branch pipe (2), the second branch pipe (3) and the third branch pipe (4) extend towards one side of the front flange (1) to form an inclined back-drive exhaust manifold.

4. The inclined rear-drive exhaust manifold assembly with the EGR pipe structure as recited in claim 3, wherein: the first branch pipe (2) bypasses the second branch pipe (3) and is communicated with the collecting pipe (5).

5. The inclined rear-drive exhaust manifold assembly with the EGR pipe structure as recited in claim 4, wherein: an oxygen sensor mounting seat (9) is fixed on the upper end face of the manifold pipe (5).

6. The inclined rear-drive exhaust manifold assembly with the EGR pipe structure as recited in claim 5, wherein: and the rear end of the rear flange (7) is provided with a stud (8).