JP2006022802A - Exhaust manifold for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust manifold for an automobile mountable on even a vehicle in which the space of an engine compartment is small. <P>SOLUTION: This exhaust manifold for the automobile comprises a plurality of runners connected to a plurality of exhaust ports, and a first flow passage allowed to communicate with a part of the plurality of runners and a second flow passage allowed to communicate with the remaining runners not allowed to communicate with the first flow passage among the plurality of runners. The plurality of runners and the first and second flow passages are formed in an integrally formed body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an automobile exhaust system, and more particularly to an automobile exhaust manifold.

  Generally, an exhaust system of an automobile is for exhausting gas burned in a plurality of cylinders, and includes an exhaust manifold 1 and a muffler 2 as shown in FIG.

  In particular, as shown in FIG. 1, the conventional exhaust manifold 1 includes a first exhaust pipe 11, a second exhaust pipe 12, and a third exhaust pipe respectively connected to a plurality of exhaust ports (not shown) of the engine. 13 and the fourth exhaust pipe 14.

  At the same time, the exhaust manifold 1 connects the first exhaust pipe 11 and the third exhaust pipe 13 to collect and guide the exhaust gas of the first exhaust pipe 11 and the exhaust gas of the third exhaust pipe 13 together. The second connecting pipe 21, the second exhaust pipe 12 and the fourth exhaust pipe 14 are connected to collect and guide the exhaust gas of the second exhaust pipe 12 and the exhaust gas of the fourth exhaust pipe 14 together. It further includes a connecting pipe 22.

  At the same time, the exhaust manifold 1 connects the first connecting pipe 21 and the second connecting pipe 22 to collect the exhaust gas of the first connecting pipe 21 and the exhaust gas of the second connecting pipe 22 into one muffler (M ) Is further included.

  Accordingly, the exhaust gases discharged to the exhaust ports of the odd-numbered cylinders flow into the first connection pipe 21 through the first and third exhaust pipes 11 and 13 according to the explosion order, and then are integrated through the first connection pipe 21. 30. And finally, it is discharged to the outside through the muffler 2.

  The exhaust gases discharged to the exhaust ports of the even-numbered cylinders flow into the second connecting pipe 22 through the second and fourth exhaust pipes 12 and 14 in the order of explosion, and then are integrated through the second connecting pipe 22. 30. And finally, it is discharged outside through the muffler 2.

However, the conventional exhaust manifold has a problem that it occupies a lot of space in terms of layout.
That is, in order to provide each of the first, second, third, and fourth exhaust pipes, the first and second connecting pipes, and the integrated duct, a wide space is required in the engine room. The exhaust manifold could not be used in vehicles with a small engine room.
As a technique for reducing the space occupied by the exhaust manifold, for example, Patent Document 1 discloses a technique in which the arrangement and shape of exhaust pipes and communication pipes are improved. However, the effect of reducing the volume of the entire exhaust manifold is small.
JP 2000-328937 A

  An object of the present invention is to provide an automobile exhaust manifold that can be applied to a vehicle having a narrow engine room space.

  To achieve the above object, an automobile exhaust manifold according to the present invention includes a plurality of runners respectively connected to a plurality of exhaust ports, a first flow path communicating with a part of the plurality of runners, and the A second flow path communicating with the rest of the plurality of runners, wherein the plurality of runners and the first and second flow paths are formed in an integrally formed main body. .

Further, it is preferable that the first channel and the second channel are separated and partitioned by one partition.
Further, it is preferable that the plurality of runners are separated and partitioned by one partition wall.
Moreover, it is preferable that the main body is formed in a substantially rectangular parallelepiped shape.
The plurality of runners are preferably connected to the first and second flow paths substantially perpendicularly.
The plurality of runners are preferably formed in parallel to each other.
The first and second flow paths are preferably formed in parallel to each other.

According to the present invention, the runner is formed by the single body, which is advantageous in terms of layout.
Further, according to the present invention, in order to separate the first flow path and the second flow path, the volume is further reduced by adopting one partition wall, rather than adopting a double partition wall or individual pipes. There are advantages that can be made.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
2 is a perspective view showing an automobile exhaust manifold according to the present invention, FIG. 3 is a cross-sectional view taken along the line II of FIG. 2, and FIG. 4 is a cross-sectional view of the main part of FIG. It is II sectional drawing.
As shown in FIG. 2, an automobile exhaust manifold according to an embodiment of the present invention includes an integrally formed manifold body 100, and a plurality of runners (O, E) and first and second flow paths in the body 100. 210, 220 are formed. The plurality of runners (O, E) are respectively connected to a plurality of exhaust ports (P) of the engine. The first flow path 210 communicates with a part of the plurality of runners (refer to the reference sign “O”), and the second flow path 220 is connected to the rest of the plurality of runners (refer to the reference sign “E”). The

In an embodiment of the present invention, no separate pipe is used to provide the runner. That is, the main body 100 forms runners (O, E) all at once. Therefore, the automobile exhaust manifold according to the embodiment of the present invention has various advantages in terms of layout.
Further, the first flow path 210 and the second flow path 220 are preferably formed in the length direction inside the main body 100.

Also, the odd-numbered runners (O) of the plurality of runners are connected to the first flow path 210, and the even-numbered runners (E) of the plurality of runners are connected to the second flow path 220. Is preferred.
Specifically, as shown in FIGS. 2 and 3, each of the odd-numbered runners (O) is formed in the lateral direction inside the main body 100 so as to be able to penetrate the first flow path 110. Is preferred.
Further, like the odd-numbered runners (O) shown in FIG. 3, each of the even-numbered runners (E) is formed in the lateral direction inside the main body 100 so as to be able to penetrate the second flow path 220. Preferably it is done. Here, the shape which can penetrate is the same as that of FIG.

Further, it is more preferable that the first flow path 210 and the second flow path 220 are separated and partitioned by one partition wall 300.
Moreover, it is preferable that the plurality of runners (O, E) are separated and separated by one partition different from the above.

  A double partition wall (not shown) may be used to separate the first flow path 210 and the second flow path 220, or a separate pipe (not shown) may be inserted into the main body 100. is there. However, in terms of layout, the main body 100 employing one partition 300 has an advantage that its volume can be reduced as compared with a main body employing a double partition or individual tubes. Further, since the first flow path 210 and the second flow path 220 are separated, the effect of preventing exhaust interference between cylinders due to the stroke is maintained.

  As shown in FIGS. 2 to 4, according to the present embodiment, the main body 100 is formed in a substantially rectangular parallelepiped shape. Further, the plurality of runners (O, E) are connected to the first and second flow paths 210 and 220 substantially vertically. The plurality of runners (O, E) are formed in parallel to each other. Further, the first and second flow paths 210 and 220 are formed in a linear shape in parallel with each other.

Hereinafter, the flow of the exhaust gas by the exhaust manifold for automobile according to the embodiment of the present invention configured as described above will be described in detail.
The odd-numbered runner (O) includes the first runner 110 and the third runner 130, and the even-numbered runner (E) includes the second runner 120 and the fourth runner 140. . However, since the number of runners may vary depending on the number of cylinders of the engine, the present invention is not limited to this.

  First, exhaust gas that has passed through the first and third exhaust ports (see “P” in FIG. 2) flows into the first flow path 210 through the first and third runners 110 and 130 according to the explosion order, and then the first flow. It flows into the integrated duct (see 30 in FIG. 1) through the path 210. And finally, it is discharged outside through a muffler (see 2 in FIG. 1).

Exhaust gases that have passed through the second and fourth exhaust ports (see “P” in FIG. 2) flow into the second flow path 210 through the second and fourth runners 120 and 140 according to the explosion order, and then the second flow. It flows into the integrated duct (see 30 in FIG. 1) through the path 210. And finally, it is discharged outside through a muffler (see 2 in FIG. 1).
Therefore, the exhaust manifold for automobiles according to the embodiment of the present invention can reduce the exhaust interference between the cylinders due to the explosion order, and at the same time is advantageous in terms of layout.

  Although the preferred embodiments of the present invention have been described above, those having ordinary knowledge in the technical field to which the present invention pertains may change to embodiments of a different form within the scope of the technical idea of the present invention. It goes without saying that it can be done.

It is the perspective view which showed the exhaust manifold for motor vehicles by a prior art. It is the perspective view which showed the exhaust manifold for motor vehicles by this invention. It is II sectional drawing which showed the principal part of FIG. It is II-II sectional drawing which showed the principal part of FIG.

Explanation of symbols

1 exhaust manifold 2 muffler 11 first exhaust pipe 12 second exhaust pipe 13 third exhaust pipe 14 fourth exhaust pipe 21 first connection pipe 22 second connection pipe 30 integrated duct 100 main body 110 first runner 120 second runner 130 second 3 runners 140 4th runner 210 1st flow path 220 2nd flow path 300 One partition

Claims (8)

A plurality of runners each connected to a plurality of exhaust ports; and a first flow path communicating with a part of the plurality of runners and a second flow path communicating with the rest of the plurality of runners;
The exhaust manifold for automobiles, wherein the plurality of runners and the first and second flow paths are formed in an integrally formed main body.   2. The automobile exhaust manifold according to claim 1, wherein the first flow path and the second flow path are separated by one partition wall.   The automobile exhaust manifold according to claim 1, wherein the plurality of runners are separated by one partition wall.   The automobile exhaust manifold according to claim 1, wherein the main body has a substantially rectangular parallelepiped shape.   2. The automobile exhaust manifold according to claim 1, wherein the plurality of runners are connected substantially vertically to the first and second flow paths.   The automobile exhaust manifold according to claim 1, wherein the plurality of runners are formed in parallel to each other.   The exhaust manifold for an automobile according to claim 1, wherein the first and second flow paths are formed in parallel to each other. The body has a generally hexahedral shape;
The plurality of runners are connected substantially vertically to the first and second flow paths;
2. The automobile exhaust manifold according to claim 1, wherein the plurality of runners are linearly formed in parallel with each other; and the first and second flow paths are linearly formed in parallel with each other.

Images