JPH03114561U

JPH03114561U -

Info

Publication number: JPH03114561U
Application number: JP2473290U
Authority: JP
Priority date: 1990-03-12
Filing date: 1990-03-12
Publication date: 1991-11-25
Anticipated expiration: 2005-03-12
Also published as: JPH0741877Y2

Description

[Brief explanation of drawings]

第１図は本考案になる摺動絞り弁型気化器の一
実施例を示す縦断面図、第２図は第１図−線
における横断面図、第３図はシール部材の一実施
例を示す縦断面図、第４図は第３図の斜視図、第
５図はシール部材の他の実施例を示す縦断面図で
ある。１……気化器本体、Ｆ……摺動絞り弁、Ｍ……
主絞り弁、Ｓ……副絞り弁、Ｐ……受圧室、１０
Ｂ……主絞り弁Ｍの機関側の側面、１０Ｅ……受
圧室形成凹部、１０Ｆ……内壁、１４……区画体
突部、１５……制御板部、１５Ｂ……背面、１８
……シール部材、１８Ａ……基部、１８Ｂ……薄
板弁体。 Fig. 1 is a longitudinal sectional view showing an embodiment of the sliding throttle valve type carburetor according to the present invention, Fig. 2 is a cross sectional view taken along the line - Fig. 1, and Fig. 3 is an embodiment of the sealing member. 4 is a perspective view of FIG. 3, and FIG. 5 is a longitudinal sectional view showing another embodiment of the sealing member. 1... Carburetor body, F... Sliding throttle valve, M...
Main throttle valve, S... Sub-throttle valve, P... Pressure receiving chamber, 10
B...Side surface of the main throttle valve M on the engine side, 10E...Pressure chamber forming recess, 10F...Inner wall, 14...Dividing body protrusion, 15...Control plate portion, 15B...Back surface, 18
... Seal member, 18A ... Base, 18B ... Thin plate valve body.

Claims

[Claims for Utility Model Registration] A sliding throttle valve F disposed within the throttle valve guide tube 3 of the carburetor body 1 is composed of a main throttle valve M and a sub-throttle valve S, the main throttle valve M being , at least the engine-side side surface 10B of the main throttle valve M and the engine-side guide cylinder surface 3B of the throttle valve guide cylinder 3 are brought into rolling contact via the rotating member 11, and are mechanically operated in the opening/closing direction of the intake passage 2; Furthermore, a pressure receiving chamber forming recess 10E that opens toward the side surface 10B is bored in the side surface 10B on the engine side of the main throttle valve M, while the sub-throttle valve S
The partition body protrusion 14 is movably arranged in the pressure receiving chamber forming recess 10E, and the control plate part 15 is formed integrally with the partition body protrusion 14 and can close the intake passage 2.
The partition protrusion 1 of the sub-throttle valve S is formed by
4 into the pressure-receiving chamber-forming recess 10E of the main throttle valve M, the pressure-receiving chamber P is formed by the pressure-receiving chamber-forming recess 10E and the partition protrusion 14, and the control plate 15 of the sub-throttle valve S This forms a side surface on the engine side as a sliding throttle valve F that controls opening and closing of the intake passage 2, and furthermore, in the pressure receiving chamber P, there is a negative pressure in the intake passage 2A on the engine side from the sliding throttle valve F. The control plate part 15 opens the effective pressure receiving area _S1 of the pressure receiving chamber P into the intake passage 2A on the engine side from the sliding throttle valve F at least when the sliding throttle valve F is opened at idling. Effective pressure receiving area S of side surface 15A
In a sliding throttle valve type carburetor smaller than ₂ , the partition protrusion 14 has an outer diameter L slightly smaller than the inner diameter H of the inner wall 10F of the pressure receiving chamber forming recess 10E.
The inner part 18C is the outer periphery 14A of the partition protrusion 14.
A base 18A made of an elastic material, the outer diameter N of which is airtightly fitted into the outer diameter N of the partition protrusion 14;
A thin plate valve body 18 extending outward from D to the entire circumference
The thin plate valve body 18B is placed in the pressure receiving chamber forming recess 10.
E, the engine-side side surface 10B of the main throttle valve M that is connected to the vicinity of the opening opening in the engine-side side surface 10B of the main throttle valve M; and the engine-side side surface of the main throttle valve M of the control plate section 15. A sliding throttle valve type carburetor is disposed within a gap R formed between a side surface 10B of the control plate section 15 and a rear surface 15B of the control plate section 15. The base 18A of the seal member is connected to the partition protrusion 1
4. The sliding throttle valve type carburetor according to claim 1, wherein the sliding throttle valve type carburetor is fitted into a guide groove 15B formed on the outer periphery 14A of the sliding throttle valve type carburetor. The base portion 18A of the sealing member and the thin plate valve body 18
2. The sliding throttle valve type carburetor according to claim 1, wherein the sliding throttle valve type carburetor and B are integrally formed of rubber. 2. The sliding throttle valve type carburetor according to claim 1, wherein the thin plate valve body 18B of the sealing member is inclined toward the engine-side side surface 10B of the main throttle valve M. 2. The sliding throttle valve type carburetor according to claim 1, wherein the base portion 18A of the sealing member is made of rubber, and the thin plate valve body is made of a synthetic resin thin plate or a metal thin plate.