JPH0410375Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to an improvement in the seal structure at the connection between the air cleaner and carburetor of an automobile.

(Prior art) Conventionally, as shown in Fig. 4, a sealing material C made of rubber or the like is interposed at the connection between the air cleaner B and the carburetor A, especially in a center bolt fixed type air cleaner, to prevent air from flowing into the carburetor A. A seal is formed by pressing cleaner B to prevent gasoline, etc. from leaking from this area to the outside.

(Problem to be solved by the invention) However, in the above-mentioned conventional air cleaner, when a large amount of oil or steam is sent into the air cleaner from the PCV pipe, or when the engine speed is accelerated or decelerated, air pulsation occurs. This causes some of the gasoline to splash up from the main nozzle of the carburetor, staining and deteriorating the sealing material. For this purpose, a rubber sealing material with strong oil resistance must be used, but the more oil resistant the sealing material, the more expensive it is, and in addition, the amount of evaporated emissions increases as gasoline comes into direct contact with the sealing part. It has some drawbacks. Therefore, this invention is intended to improve the above-mentioned drawbacks of the conventional ones, and is intended to prevent the sealing portion from being contaminated by oil or the like.

(Means for solving the problem) At the joint between the air cleaner and the carburetor, the seal between them is covered with a protective plate, and the covered part is designed to prevent gasoline, etc. from entering the seal from the side wall of the carburetor. A space is provided to prevent penetration.

(Function) With the above configuration, the seal part of the connection between the air cleaner and the carburetor is covered by the protective plate, so that oil or steam sent from the PCV pipe, or gasoline splashing up and flowing back from the main nozzle of the carburetor, is not directly exposed to it. There is no
Further, since a space is provided to prevent gasoline from penetrating between the protection plate and the side wall of the carburetor, the gasoline does not reach the sealing portion and the sealing portion is not contaminated.

(Example) This invention will be explained with reference to an example shown in the drawings. 1
is an air cleaner, 2 is an air cleaner case, and inside the air cleaner case 2,
The material 3 is housed therein, and the connection with the carburetor 7 is achieved by a center bolt 4 and a tightening nut 5 via packing. At the joint between the air cleaner 1 and the carburetor 7, there is a sealing material 8 made of rubber between the case 2 of the air cleaner 1 and the mounting opening of the carburetor 7.
interpose it, and connect it to the mounting port of the carburetor 7.
The case 2 of the air cleaner 1 is pressed and supported, and the sealing material 8 is covered with a protection plate 9. In order to prevent gasoline from penetrating into the sealing material 8 due to capillary action from the close contact between the protective plate 9 and the side wall of the carburetor 7, a space 12 with a wide gap is provided to prevent gasoline from penetrating. . This can also be achieved by enlarging the carburetor mounting opening as shown in Figure 2.
The protection plate 9 may be bulged inward of the carburetor 7 to provide a space between it and the side wall. 6 is a PCV pipe, and 10 and 11 are main nozzles of the carburetor 7.

Since the embodiment is configured as above, the PCV
When a large amount of oil or steam is sent through the pipe 6, or when gasoline in the carburetor 7 flows backwards, the rubber seal 8 is not contaminated and the gap between the side wall of the carburetor 7 and the protective plate 9 is penetrated. Since the space 12 prevents the fuel from reaching the sealing material 8, the sealing material 8 is not contaminated and deteriorated by the gasoline or the like.

(Effects of the invention) As described above, it is possible to improve the durability of the seal material and reduce evaporation without using an effective oil-resistant material as the seal material. It has excellent effects.

[Brief explanation of drawings]

FIG. 1 shows a longitudinal sectional view of the air cleaner of this invention, FIGS. 2 and 3 are enlarged longitudinal sectional views of the seal portion of this invention, and FIG. 4 shows a conventional one. 1... Air cleaner, 2... Air cleaner case, 3... Material, 4... Center bolt,
5...Tightening nut, 6...PCV pipe, 7...
...Carburetor, 8...Seal, 9...Protection plate,
10, 11... Main nozzle, 12... Penetration prevention space.

Claims (1)

[Scope of utility model registration request] An air cleaner seal structure in which a seal interposed at the connection with the carburetor is covered with a protection plate with a space to prevent penetration.