KR970009534B1 - Intake manifold gasket for internal combustion engine - Google Patents

Abstract

The suction manifold gasket of vehicle LPG engine installs a predetermined wire mesh on each of through holes formed on a typical suction manifold gasket, to thereby minimize the reduction of the suction efficiency of the engine and prevent explosion generated due to backfire from the engine. The suction manifold gasket is inserted into a coupled portion of a cylinder head(16) of an LPG engine with a suction manifold(12) and forms a plurality of through holes(20) on the positions corresponding to a plurality of suction ports(18) on the cylinder head(16). The suction manifold gasket comprises a wire mesh(24) on each of the through holes(20).

Description

Intake manifold gasket for vehicle LPG engine

1 is an exploded perspective view showing the cylinder head portion of the LPG engine.

2 is a plan view showing an intake manifold gasket according to the present invention.

* Explanation of symbols for main parts of the drawings

12: intake manifold 16: cylinder head

20: through hole 22: intake manifold gasket

24: wire mesh

The present invention relates to an intake manifold gasket of a vehicle LPG engine, and more particularly, by installing a predetermined wire mesh in a through hole formed in a conventional intake manifold gasket, minimizing a decrease in engine intake efficiency. The present invention relates to an intake manifold gasket of an LPG engine for a vehicle that can prevent an explosion caused by backfire from an engine.

In general, in an LPG engine using LPG mixed with propane gas and butane gas in a proportion, the fuel supply device includes the filtration air supplied from an air cleaner as shown in FIG. A throttle body (10) having a mixer for mixing fuel gas at a predetermined ratio is coupled to the intake manifold (12), and the intake manifold (12) is a cylinder head above the cylinder block (14). The intake manifold 12 and the cylinder head 16 are connected to each other so that the intake manifold 12 and the intake port 18 formed on the cylinder head 16 can communicate with each other. The intake manifold gasket 22 is formed by inserting the through hole 20 so as to allow airtightness of the coupling portion to be maintained.

On the other hand, in the LPG engine, when the valve opening / closing timing is inappropriate, for example, the intake valve starts to open even before the exhaust valve in the cylinder head 14 is closed, the concentration of the mixed gas supplied at the time of acceleration becomes lean temporarily. As the propagation speed increases, a backfire occurs. In the conventional intake manifold gasket structure as described above, the flame generated during backfire passes through the through hole 20 and then passes through the intake manifold 12 to the throttle body. By reaching (10), there was a problem that the mixture gas inside the throttle body 10 exploded, and even the air cleaner hood could be damaged.

The present invention is to solve the conventional problems, and to minimize the intake efficiency of the engine while minimizing the intake manifold gasket of the vehicle LPG engine of the new type to prevent the explosion caused by backfire by using the cooling effect of the wire mesh The purpose is to provide.

In order to achieve the above object, the present invention is inserted into the coupling portion of the cylinder head and the intake manifold of the LPG engine, the intake manifold gasket of the structure is formed in the through hole corresponding to each intake port on the cylinder head, It has the feature of installing a wire mesh in the through hole.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a plan view of the intake manifold gasket of the vehicle LPG engine according to the present invention, the cylinder head 16 in the intake manifold gasket 22 which is installed for airtightness between the cylinder head 16 and the intake manifold 12 It is shown that the wire mesh 24 is provided in each of the plurality of through holes 20 drilled at positions corresponding to the respective intake ports 18 of FIG.

In the present invention as described above, the size of the eye of the wire mesh 24 is installed in the through hole 20 so that one side is about 1.5mm in order to maximize the cooling effect while minimizing the decrease in suction efficiency of the mixed gas. Form.

Such action of the present invention is as follows.

When backfire occurs due to inaccuracy of the valve opening / closing timing such as the intake valve starts to open before the exhaust valve in the cylinder head 14 is completely closed during the operation of the LPG engine, the flame generated by the backfire The intake manifold 12 is to be propagated through the intake port 18 on the intake port 18. In this case, the intake manifold gasket 22 is caused by the cooling effect of the wire mesh 24 installed on the intake manifold gasket 22. It is blocked at the installation position so that it does not propagate into the intake manifold 22.

According to the present invention, the wire mesh is installed in the through hole on the intake manifold gasket which is inserted between the cylinder head and the intake manifold, thereby minimizing the engine suction efficiency and reducing the back mesh from the engine due to the cooling effect of the wire mesh. There is an effect that can prevent the explosion caused by.

Claims (1)

An intake manifold gasket fitted to a coupling portion of the cylinder head 16 and the intake manifold 12 of the LPG engine and having a through hole 20 formed at a position corresponding to each intake port 18 on the cylinder head 16. The intake manifold gasket of the vehicle LPG engine according to (22), wherein a wire mesh (24) is provided in each of the through holes (20).