KR0134560Y1 - Exhaust manifold - Google Patents

Abstract

To prevent the exhaust interference of the exhaust gas back to the engine, and to improve the combustion performance of the engine. To this end, this invention comprises a pre-manifold connected to the exhaust port formed in each combustion chamber of the engine; In the exhaust manifold of the vehicle composed of a collecting pipe connected to the front exhaust pipe, gathered in communication at one end of the pre-manifold; To smooth the flow of the exhaust gas discharged from the combustion chamber, and to block the exhaust gas which is flowed back by collision with the exhaust gas discharged from another combustion chamber in advance; The disk-shaped peripheral portion 15 is fitted to the coupling portion 14 of the two separate free manifold 11 and coupled to each other, and cut into a plurality of sections and bent in two directions in one direction while extending toward the center from the peripheral portion A counterflow prevention means composed of the elastic variable portion 16 is proposed.

Description

Exhaust manifold of car

1 is a perspective view showing an exhaust system of a general vehicle.

2 is a perspective view showing an exhaust manifold of a vehicle according to the present invention.

3 is a perspective view showing the exhaust gas backflow preventing means according to the present invention.

4 is a cross-sectional view taken along the line A-A of FIG.

* Explanation of symbols for main parts of the drawings

2: exhaust manifold 11: pre-manifold

12: collecting unit 13: backflow prevention means

14: coupling portion 15: circumference

16: elastic variable part

[Technical Area of Design]

This invention relates to an exhaust manifold of an automobile, and more particularly, an exhaust manifold that prevents exhaust gas from flowing back to the engine, thereby preventing exhaust interference (or pulsation) that affects the combustion performance of the engine. It is about.

[Private Technology]

As is well known, the exhaust system of an automobile is installed at the lower part of the vehicle body so as to exhaust the combustion gas discharged after being burned in the combustion chamber of the engine to the outside, and oxidizes and reduces the toxic components of the exhaust gas, exhaust pulsation and exhaust It is installed to reduce the loss.

The general structure of such an exhaust system is shown in FIG.

As shown, a conventional exhaust system includes an exhaust manifold 2 connected to an exhaust port of an engine 1, a front exhaust pipe 3 connected to the exhaust manifold 2, and a front exhaust pipe ( 3) the pre-silencer 4 connected to the pre-silencer 4, the center exhaust pipe 5 connected to the pre-silencer 4, the main silencer 6 and the main silencer coupled to the end of the center exhaust pipe 5; It consists of a baffle (7) connected to (6).

[Technical Challenges to be Done]

In the above-described conventional exhaust system, the exhaust manifold is one that collects exhaust gas at the center and one end, and both of them have a form in which exhaust interference is low.

In this case, the exhaust interference causes the combustion gas discharged sequentially from the combustion chamber of each cylinder to be gathered in one place, so that the following combustion gas flows back toward the exhaust port by the pressure of the preceding combustion gas. Will be degraded.

Conventionally, in order to reduce the exhaust interference, only the proper design of the length and speed to where the exhaust gas is collected is provided.

However, the design scheme does not completely block the reverse flow of the exhaust gas but rather reduces it. In addition, in recent years, a catalytic converter is installed in response to exhaust gas regulation, and therefore, the length of the exhaust manifolds is shorter, and thus the exhaust interference must be increased.

This invention is devised to solve the above-mentioned problems of the prior art, and its object is to block the exhaust gas flowing back to the engine by exhaust interference, thereby improving the combustion performance of the engine.

[Configuration and Action of Design]

As a means for realizing the above object, the present invention comprises a pre-manifold connected to exhaust ports formed in respective combustion chambers of an engine; In the exhaust manifold of an automobile composed of a collecting pipe connected to the front exhaust pipe and gathered together at one end of the pre-manifold, the exhaust gas discharged from the combustion chamber is smoothed and discharged from other combustion chambers in advance. A reverse flow prevention means for blocking the exhaust gas flowing back by collision with the exhaust gas thus obtained is provided for each of the free manifolds.

The backflow preventing means includes a disk-shaped peripheral portion which is fitted to the coupling portion of the two free manifolds and coupled together; It extends toward the center from the circumference and is cut into a plurality, and consists of an elastic variable portion that is bent in two stages in one direction.

According to the above configuration, the backflow preventing means allows the normal flow of the exhaust gas discharged through the exhaust port, while blocking the reverse flow of the exhaust gas back to the exhaust port, thereby substantially eliminating the exhaust interference. .

EXAMPLE

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment for implementing this invention is demonstrated in detail based on an accompanying drawing.

FIG. 2 is a perspective view showing an exhaust manifold according to this embodiment, and FIG. 3 is a perspective view showing the exhaust gas backflow preventing means as a main part of this embodiment, and FIG. 4 is a cutaway view taken along line AA of FIG. It is a cross section.

In describing this embodiment, the same reference numerals are used for the configuration of this embodiment, which is the same as the drawings cited in the prior art, and will not be described again.

Reference numeral 2 in the drawings refers to the entire exhaust manifold. The exhaust manifold (2) is a pre-manifold (11) connected to the exhaust port formed in each combustion chamber of the engine, and gathered in one at the end of the pre-manifold (11) and collected in the center, connected to the front exhaust pipe It consists of a collecting tube 12.

Here, the free manifold 11 according to this embodiment is formed in two pieces as can be seen from the drawings, and is formed by attaching exhaust gas backflow means 13 as the gist of this embodiment to the joining portion together. .

More specifically, the backflow preventing means 13 smoothes the normal flow of the exhaust gas discharged from the combustion chamber of the engine, and blocks the reverse flow of the exhaust gas backflowed by colliding with the exhaust gas previously discharged from the other combustion chamber. To be installed.

To this end, the backflow prevention means 13 are cut into a plurality of circumference portions 15 inserted into the coupling portions 14 of the pre-manifold 11 and fixed together, extending toward the center from the circumference portion 15. It consists of the elastic variable part 16 which opens by the pressure of waste gas, and makes the waste gas flow smoothly.

The elastic variable portion 16 is provided with a through hole 18 in the center, the through hole 18 to facilitate the discharge of the exhaust gas. In this case, the through hole 18 is preferably formed to the size of ½ of the inner diameter of the free manifold (11).

The reverse flow prevention means 13 having the above-described configuration is formed by pressing the spring steel of the thin plate, and then heat-treating again to have an elastic force.

On the other hand, the circumference 15 may be fastened by bolts (not shown) to the coupling portion 14 of the pre-manifold 11, for this purpose, the bolt fastening hole 17 in the circumference 15 Is formed.

In addition, the elastic variable portion 16 may be bent in two stages toward the front exhaust pipe to more smoothly achieve the normal flow of the exhaust gas.

According to the configuration of this embodiment described above, the operation of this invention is described.

The exhaust gas discharged from the combustion chamber of the engine is pushed by the continuous explosion pressure of the combustion chamber, pushing the elastic variable portion 16 of the backflow prevention means 13 together with the solid line 16 'in FIG. It is discharged smoothly to the side.

On the other hand, the exhaust gas may be flowed back by colliding at the collecting unit 12 with the exhaust gas previously discharged from the other combustion chamber, wherein the elastic variable unit 16 is the dashed line 16 in FIG. Deformed as it is to block the reverse flow of the exhaust gas.

According to this action, this embodiment can prevent the phenomenon of interference of the exhaust gas.

[Effect of design]

Through the embodiments described above, the exhaust manifold of the automobile according to the present invention substantially solves the problems of the prior art.

More specifically, this design has the effect of eliminating the interference phenomenon of the exhaust gas flowing back toward the engine by employing the exhaust gas backflow preventing means.

In addition, this effect is countercurrent to the combustion chamber of the conventional engine, thereby substantially eliminating the problem of disturbing the formation of the mixing ratio and the formation of the engine negative pressure, thereby obtaining an effect of improving the combustion performance of the engine.

On the other hand, this invention is not limited to the specific preferred embodiment described above, and anyone of ordinary skill in the art to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the utility model registration claims Modifications may be made.

Claims (5)

A free manifold connected to the exhaust port formed in each combustion chamber of the engine; In the exhaust manifold of the vehicle composed of a collecting pipe connected to the front exhaust pipe, gathered in communication at one end of the pre-manifold; Back flow prevention means for smoothing the normal flow of the exhaust gas discharged from the combustion chamber and blocking the exhaust gas flowed back by collision with the exhaust gas discharged from the other combustion chamber in advance is provided in the pre-manifold. Exhaust manifold of a car. 2. The motor vehicle according to claim 1, wherein the backflow prevention means comprises a circumferential portion fitted into two coupling portions of the pre-manifold separated by two, and an elastic variable portion cut into a plurality of portions extending toward the center from the circumferential portion. Exhaust manifold. 3. The exhaust manifold of a vehicle according to claim 2, wherein the circumference portion is fitted to the coupling portion of the two separate free manifolds and further fastened by bolts. 3. The exhaust manifold of a vehicle according to claim 2, wherein the elastic variable portion is bent in two stages toward the front exhaust pipe. The exhaust manifold of an automobile according to claim 1 or 2, wherein the backflow preventing means is formed by pressing the spring steel of the thin plate.