CN218717082U

CN218717082U - Exhaust assembly of engine and engine

Info

Publication number: CN218717082U
Application number: CN202222861286.5U
Authority: CN
Inventors: 郭军军; 张波
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-24
Anticipated expiration: 2032-10-28

Abstract

The embodiment of the application discloses an exhaust assembly of an engine and the engine, wherein the exhaust assembly comprises a plurality of exhaust pipes; an exhaust manifold is led out from the side wall of each exhaust pipe, a first connecting port is formed at one end of each exhaust manifold, which is far away from the exhaust pipe, and the first connecting port is used for communicating with an exhaust port of the cylinder; the central axes of all the exhaust pipes are positioned on the same plane and are parallel to each other, every two exhaust pipes are an exhaust pipe group, at least parts of the two exhaust pipes of the same exhaust pipe group are overlapped, the flanges on the overlapped parts of the two exhaust pipes are aligned one by one, and the fastener connecting holes on the side, close to each other, of the two mutually aligned flanges are integrated together to form an integral flange. The exhaust pipe and/or the collecting pipe led out from the end part of the exhaust pipe are/is provided with expansion joints. The exhaust assembly is good in thermal deformation capacity, capable of achieving pulse type exhaust and small in occupied arrangement space, so that an engine adopting the exhaust assembly is compact in structure and small in size, and can be applied to narrow space.

Description

Exhaust assembly of engine and engine

Technical Field

The application relates to the technical field of engines, in particular to an exhaust assembly of an engine and the engine adopting the exhaust assembly.

Background

The exhaust mode of the engine mainly comprises a constant pressure type exhaust mode and a pulse type exhaust mode, the constant pressure type exhaust mode has the defects of large volume of an exhaust pipe, insufficient exhaust energy under low load, slow response of a supercharger and the like, and the pulse type exhaust mode can avoid the defects.

The pulse type exhaust mode generally needs to be provided with a plurality of exhaust pipes, and the space occupied by the exhaust pipes can lead to the increase of the whole volume of the engine, so that the engine is not suitable for being applied in narrow space, and the application of pulse type exhaust is limited to a certain extent.

Therefore, how to arrange a plurality of exhaust pipes to realize pulse type exhaust on the premise of ensuring the compactness of the engine is a technical problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the present application provides an exhaust assembly of an engine, the exhaust assembly including a plurality of exhaust pipes; an exhaust manifold is led out from the side wall of each exhaust pipe, a first connecting port is formed at one end, far away from the exhaust pipe, of each exhaust manifold, and the first connecting port is used for being communicated with an exhaust port of a cylinder; the central axes of all the exhaust pipes are positioned on the same plane and are parallel to each other.

In one embodiment of the exhaust assembly of the engine, all the first connection ports are located on the same plane, and a plane where the central axis of the exhaust pipe is located is parallel to a plane where the first connection ports are located.

In one embodiment of the exhaust assembly of the engine, the number of the exhaust pipes is 2n, and the exhaust pipes are provided with flanges; each two exhaust pipes are an exhaust pipe group, the two exhaust pipes of the same exhaust pipe group are at least partially overlapped, the flanges on the overlapped parts of the two exhaust pipes are aligned one by one, and the fastener connecting holes on the mutually aligned sides of the two flanges close to each other are integrated together to form an integral flange; wherein n is an integer greater than or equal to 1.

In one embodiment of the exhaust assembly of the engine, the number of the exhaust pipe groups is multiple, and any two groups of the exhaust pipe groups are at least partially overlapped.

In one embodiment of the exhaust assembly of the engine, a collecting pipe is led out from one end of each of two exhaust pipes of the same exhaust pipe group, and ends, far away from the exhaust pipes, of the two collecting pipes are converged to form a second connecting port which is used for being communicated with a supercharger of the engine.

In one embodiment of the exhaust assembly of the engine, the exhaust pipe is provided with an expansion joint and/or the collecting pipe is provided with an expansion joint.

In addition, the application also provides an engine, wherein the engine adopts the exhaust assembly of any one of the above parts.

In one embodiment of the engine, the number of the cylinders of the engine is eight, the number of the exhaust pipes is four, and two exhaust manifolds are led out from the side wall of each exhaust pipe, so that each exhaust pipe is communicated with the exhaust ports of the two cylinders of the engine through the two exhaust manifolds.

In one embodiment of the engine, a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, a fifth cylinder, a sixth cylinder, a seventh cylinder, and an eighth cylinder of the engine are sequentially arranged in a row, a first exhaust pipe is communicated with exhaust ports of the first cylinder and the eighth cylinder, a second exhaust pipe is communicated with exhaust ports of the second cylinder and the seventh cylinder, a third exhaust pipe is communicated with exhaust ports of the third cylinder and the sixth cylinder, and a fourth exhaust pipe is communicated with exhaust ports of the fourth cylinder and the fifth cylinder.

In one embodiment of the engine, the first and second exhaust pipes are arranged adjacent to each other to form an exhaust pipe group, and the third and fourth exhaust pipes are arranged adjacent to each other to form another exhaust pipe group.

The application provides an exhaust assembly can realize the pulsed exhaust, and the arrangement space who just occupies is little for adopt this exhaust assembly's engine compact structure, small, can use in narrow space.

Drawings

FIG. 1 is a front view of an embodiment of an exhaust assembly of an engine provided herein;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a right side view of FIG. 1;

fig. 4 is a perspective view of the inner pipe spool of fig. 1.

The reference numerals are explained below:

10 exhaust pipes, 10a first exhaust pipe, 10b a second exhaust pipe, 10c a third exhaust pipe, 10d a fourth exhaust pipe,

20 exhaust manifold, 201 first connection port;

30 flanges, 301 fastener attachment holes;

40 an integral flange;

50 manifold, 501 second connection port;

60 expansion joints.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the present application, the following detailed description will be made with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 to 4, the exhaust assembly includes a plurality of exhaust pipes 10 (four in the drawings), and an exhaust manifold 20 is led out from a side wall of each exhaust pipe 10. An end of the exhaust manifold 20 remote from the exhaust pipe 10 forms a first connection port 201, and the first connection port 201 is used for communicating with an exhaust port of a cylinder.

As shown in fig. 1, the central axes of all the exhaust pipes 10 of the exhaust assembly are located on the same plane and are parallel to each other. With the arrangement, pulse type exhaust can be realized by using the exhaust pipes 10, and the occupied arrangement space is small, so that the engine adopting the exhaust assembly is compact in structure and small in size, and can be applied to narrow spaces.

Specifically, as shown in fig. 2, the first connection ports 201 of all the exhaust manifolds 20 are located on the same plane, and the plane on which the central axis of the exhaust pipe 10 is located is parallel to the plane on which the first connection ports 201 are located. With this arrangement, in a state where the first connection port 201 of the exhaust manifold 20 is communicated with the exhaust port of the cylinder, the exhaust pipe 10 is substantially parallel to the head end face where the exhaust port of the cylinder is located, which enables the overall engine structure to be more compact.

Specifically, the number of exhaust pipes 10 is 2n, n is an integer greater than or equal to 1, and in the figure, the number of exhaust pipes 10 is four, that is, n = 2.

Specifically, the exhaust pipe 10 is provided with a flange 30. For convenience of manufacture, the exhaust pipe 10 may be formed by connecting a plurality of short pipes in sequence, wherein the flange 30 is disposed at an end of each short pipe, and the two short pipes are connected to each other through the flange 30 at the end.

Specifically, each two exhaust pipes 10 are an exhaust pipe group, and in the embodiment shown in fig. 1, two upper and lower exhaust pipe groups are provided. When multiple sets of exhaust pipe groups are provided, any two sets of exhaust pipe groups are at least partially overlapped, and taking fig. 1 as an example, the left side of the exhaust pipe group at the lower part of fig. 1 and the exhaust pipe group at the upper part are overlapped.

Two exhaust pipes 10 of the same exhaust pipe group are at least partially overlapped, flanges 30 on the overlapped parts of the two exhaust pipes 10 are aligned one by one, and fastener connecting holes 401 on the sides close to each other of the two flanges 30 aligned with each other are integrated together to form an integral flange 40. The following specifically describes an upper exhaust pipe group shown in fig. 1 as an example.

The left side portion of the lower exhaust pipe 10 (i.e., the third exhaust pipe 10 c) of the upper exhaust pipe group shown in fig. 1 is overlapped with the upper exhaust pipe 10 (i.e., the fourth exhaust pipe 10 d), seven flanges 30 are provided in the third exhaust pipe 10c in order from left to right, seven flanges 30 are provided in the fourth exhaust pipe 10d in order from left to right, and the seven flanges 30 of the third exhaust pipe 10c and the seven flanges 30 of the fourth exhaust pipe 10d are aligned one by one and integrated together to form seven integral flanges 40. Two of which are shown in figure 3 as integral flanges 40. As shown in fig. 3, the fastener attachment holes 301 on the side of the two flanges 30 of the single unitary flange 40 that are adjacent to each other are integrated together.

Since the fastener connecting holes 301 on the sides of the two flanges 30 of the integral flange 40 that are close to each other are integrated together, only a small fastener mounting space needs to be reserved between the two exhaust pipes 10, so that the gap between the two exhaust pipes 10 can be set small, that is, the two exhaust pipes 10 can be arranged compactly, so that the arrangement space required for the exhaust assembly can be further reduced, and the engine can be made more compact as a whole.

Meanwhile, the integral flange 40 allows the single exhaust pipe 10 to be simultaneously fastened by the fastening members of the two flanges 30, so that the installation reliability of the single exhaust pipe 10 can be ensured, and the problem of air leakage caused by gaps on the exhaust pipe 10 due to unreliable installation is avoided.

Specifically, a collecting pipe 50 can respectively be drawn from one end of two exhaust pipes 10 of the same exhaust pipe group, one end of each collecting pipe 50 far away from the exhaust pipe 10 is crossed to form a second connecting port 501, and the second connecting port 501 is used for communicating with a supercharger of an engine, so that exhaust gas discharged from the two exhaust pipes 10 of the same exhaust pipe group can be converged together and enters the supercharger, and the supercharging effect is ensured more favorably. Of course, in practical implementation, the collecting pipe 50 may not be provided, and the exhaust gas discharged from the single exhaust pipe 10 may be separately introduced into the supercharger.

Specifically, the exhaust pipe 10 may be provided with an expansion joint 60, the manifold 50 may be provided with an expansion joint 60, and of course, one of the exhaust pipe 10 and the manifold 50 may be provided with an expansion joint 60.

The expansion joint 60 is arranged, so that the thermal deformation of the exhaust pipe 10 and the collecting pipe 50 can be absorbed, and the thermal deformation capacity of the exhaust assembly is improved.

In addition, this application still provides an engine, and this engine adopts above-mentioned exhaust assembly to carry out the exhaust.

Specifically, when the number of cylinders of the engine is eight, the number of the exhaust pipes 10 may be four, and two exhaust manifolds 20 are led out from a side wall of each exhaust pipe 10, so that each exhaust pipe 10 is respectively communicated with exhaust ports of two cylinders through the two exhaust manifolds 20. Therefore, four-pulse exhaust can be realized, and the four-pulse exhaust supercharger has quick response and good low-load performance of the engine.

Specifically, the first cylinder, the second cylinder, the third cylinder, the fourth cylinder, the fifth cylinder, the sixth cylinder, the seventh cylinder, and the eighth cylinder of the engine may be sequentially arranged in a row, that is, in-line arrangement, in which case, the first exhaust pipe 10a may communicate with the exhaust ports of the first cylinder and the eighth cylinder, the second exhaust pipe 10b may communicate with the exhaust ports of the second cylinder and the seventh cylinder, the third exhaust pipe 10c may communicate with the exhaust ports of the third cylinder and the sixth cylinder, and the fourth exhaust pipe 10d may communicate with the exhaust ports of the fourth cylinder and the fifth cylinder. The firing order of the engine may be first cylinder-third cylinder-second cylinder-fifth cylinder-eighth cylinder-sixth cylinder-seventh cylinder-fourth cylinder. Thus, the exhaust interval between the two cylinders communicating with the same exhaust pipe 10 is 360 CA, which is larger than the exhaust continuation angle, so that there is no exhaust interference between the two cylinders communicating with the same exhaust pipe 10, resulting in more uniform operation of the respective cylinders.

Specifically, the first exhaust pipe 10a and the second exhaust pipe 10b may be arranged adjacent to each other to form an exhaust pipe group, and the third exhaust pipe 10c and the fourth exhaust pipe 10d may be arranged adjacent to each other to form another exhaust pipe group. In this way, the exhaust manifolds 20 leading out of the four exhaust pipes 10 are relatively easily staggered.

The foregoing has been a description of the principles and implementations of the present application using specific examples, which are provided solely to aid in understanding the methods and their core concepts of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.

Claims

1. Exhaust assembly of an engine, characterized in that it comprises a plurality of exhaust pipes (10); an exhaust manifold (20) is led out from the side wall of each exhaust pipe (10), a first connecting port (201) is formed at one end, far away from the exhaust pipe (10), of each exhaust manifold (20), and the first connecting port (201) is used for being communicated with an exhaust port of a cylinder; the central axes of all the exhaust pipes (10) are positioned on the same plane and are parallel to each other.

2. The exhaust assembly of an engine according to claim 1, characterized in that all the first connection ports (201) are located on the same plane, and the plane in which the central axis of the exhaust pipe (10) is located is parallel to the plane in which the first connection ports (201) are located.

3. The exhaust assembly of an engine according to any one of claims 1-2, characterized in that the number of exhaust pipes (10) is 2n, the exhaust pipes (10) being provided with flanges (30); every two exhaust pipes (10) are an exhaust pipe group, the two exhaust pipes (10) of the same exhaust pipe group are at least partially overlapped, the flanges (30) on the overlapped parts of the two exhaust pipes (10) are aligned one by one, and the fastener connecting holes (301) on the sides, close to each other, of the two aligned flanges (30) are integrated together to form an integral flange (40); wherein n is an integer greater than or equal to 1.

4. The engine exhaust assembly according to claim 3, wherein the number of exhaust pipe groups is a plurality of groups, and any two groups of exhaust pipe groups are at least partially stacked.

5. An exhaust assembly according to claim 3, characterized in that a manifold (50) is led out from one end of each of the two exhaust pipes (10) of the same exhaust pipe group, and the ends of the two manifold pipes (50) far away from the exhaust pipes (10) are converged to form a second connection port (501), and the second connection port (501) is used for communicating with a supercharger of the engine.

6. Exhaust assembly of an engine according to claim 5, characterized in that the exhaust pipe (10) is provided with an expansion joint (60) and/or that the collecting pipe (50) is provided with an expansion joint (60).

7. An engine, characterized in that it employs an exhaust assembly according to any one of claims 1-6.

8. An engine according to claim 7, characterized in that the number of cylinders of the engine is eight, the number of exhaust pipes (10) is four, and two exhaust manifolds (20) are led out from the side wall of each exhaust pipe (10), so that each exhaust pipe (10) is communicated with the exhaust ports of two cylinders of the engine through the two exhaust manifolds (20).

9. An engine according to claim 8, wherein the first, second, third, fourth, fifth, sixth, seventh and eighth cylinders of the engine are arranged in a row in this order, a first exhaust pipe (10 a) is in communication with the exhaust ports of the first and eighth cylinders, a second exhaust pipe (10 b) is in communication with the exhaust ports of the second and seventh cylinders, a third exhaust pipe (10 c) is in communication with the exhaust ports of the third and sixth cylinders, and a fourth exhaust pipe (10 d) is in communication with the exhaust ports of the fourth and fifth cylinders.

10. An engine according to claim 9, characterized in that said first exhaust pipe (10 a) and said second exhaust pipe (10 b) are arranged adjacent to each other to form an exhaust pipe group, and said third exhaust pipe (10 c) and said fourth exhaust pipe (10 d) are arranged adjacent to each other to form another exhaust pipe group.