JPH0382834U

JPH0382834U -

Info

Publication number: JPH0382834U
Application number: JP14165289U
Authority: JP
Priority date: 1989-12-08
Filing date: 1989-12-08
Publication date: 1991-08-23

Description

[Brief explanation of drawings]

第１図は本考案のエンジンのロータリバルブの
回転弁体の第１の実施例を示す図、第２図は第２
の実施例を示す図、第３図及び第４図は第３の実
施例を示す図であつて、第４図は第３図の―
断面矢視図である。第５図はロータリバルブのエ
ンジンへの配置を示す図、第６図及び第７図は従
来行われているロータリバルブの構成例を示す図
であつて、第７図は第６図の−断面矢視図で
ある。符号の説明；１…回転弁体、２…回転軸、２−
１…キー溝、３…大径の両端部分、３−１…ねじ
溝が形成されていない部分、３−２…ねじ溝、４
…中央部分、５…透孔、６…リブ。 FIG. 1 is a diagram showing a first embodiment of a rotary valve body of a rotary valve for an engine according to the present invention, and FIG.
FIG. 3 and FIG. 4 are diagrams showing the third embodiment, and FIG. 4 is a diagram showing the embodiment of FIG. 3.
FIG. FIG. 5 is a diagram showing the arrangement of a rotary valve in an engine, and FIGS. 6 and 7 are diagrams showing an example of the configuration of a conventional rotary valve. It is an arrow view. Explanation of symbols; 1... Rotating valve body, 2... Rotating shaft, 2-
1...Keyway, 3...Both end portions of large diameter, 3-1...Part where no thread groove is formed, 3-2...Thread groove, 4
...Central part, 5...through hole, 6...rib.

Claims

[Scope of utility model registration request]

A columnar rotary valve body disposed in each branch pipe portion of the intake pipe between a throttle valve disposed in the intake pipe of the engine and an intake valve disposed in each cylinder of the engine rotates the engine. A rotary valve that rotates to open and close in synchronization with the intake valve, and whose opening timing relative to the opening timing of the intake valve is controlled depending on the engine load, the rotary valve comprising: the columnar rotary valve body; and the rotary valve. A valve chamber is formed in which the rotary valve body is housed and a valve port that is opened and closed by the rotation of the rotary valve body opens, and bearing means for supporting a rotating shaft formed on both end surfaces of the rotary valve body is formed. The outer circumferential surface of the rotary valve body has a diameter slightly larger at both end portions than the diameter of the columnar outer circumferential surface of the central portion, and the outer circumferential surface of the rotary valve body has a diameter slightly larger than that of the columnar outer circumferential surface of the central portion. Rotation of a rotary valve for an engine, characterized in that a gap at both ends is smaller than a gap at the center, and a screw groove is formed at both ends of the rotary valve body formed in a large diameter. Valve body.