JPS6245340U

JPS6245340U -

Info

Publication number: JPS6245340U
Application number: JP13770685U
Authority: JP
Priority date: 1985-09-09
Filing date: 1985-09-09
Publication date: 1987-03-19

Description

[Brief explanation of drawings]

第１図ないし第５図は本考案の一実施例を示し
、第１図は２サイクルエンジンの縦断面図、第２
図はシリンダの平面図、第３図は第１図の―
線に沿う断面図、第４図は第２図の―線に沿
う断面図、第５図はフラツプバルブとスライドバ
ルブの斜視図である。１……シリンダ、２……シリンダヘツド、４…
…掃気通路、５……排気通路、５ａ……（排気ポ
ート）開口、６……リブ、１２，１４……制御面
、１３……フラツプバルブ（第１制御弁）、１３
Ａ，１３Ｂ……バルブ半体、１５……スライドバ
ルブ（第２制御弁）、１６……つば、１９……駆
動機構、２２……作用部、２３……基部、３２，
３２ａ，３２ｂ……冷却水通路。 1 to 5 show one embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view of a two-stroke engine, and FIG.
The figure is a plan view of the cylinder, and Figure 3 is the same as Figure 1.
FIG. 4 is a cross-sectional view taken along the line -- in FIG. 2, and FIG. 5 is a perspective view of the flap valve and the slide valve. 1...Cylinder, 2...Cylinder head, 4...
...Scavenging passage, 5...Exhaust passage, 5a... (exhaust port) opening, 6...Rib, 12, 14...Control surface, 13...Flap valve (first control valve), 13
A, 13B...Valve half body, 15...Slide valve (second control valve), 16...Brim, 19...Drive mechanism, 22...Action part, 23...Base, 32,
32a, 32b...Cooling water passage.

Claims

[Scope of utility model registration request]

An exhaust timing control device that changes the timing of communication between the inside of the cylinder and the exhaust passage by a piston slidably fitted inside the cylinder by opening and closing the upper part of the exhaust passage near the opening to the inner peripheral surface of the cylinder. is swingably provided near the opening to the inner circumferential surface of the cylinder at the upper part of the exhaust passage, and has a control surface having approximately the same curvature as the inner circumferential surface of the cylinder at the tip of the swing; a first control valve that opens and closes the upper part of the opening by a surface; a control surface that is provided above the first control valve so as to be movable in the length direction thereof and has a control surface that has approximately the same curvature as the inner circumferential surface of the cylinder; And the first
A second control that enters between the upper edge of the control surface of the first control valve and the upper edge of the opening to close the gap between the two when the control valve is swung to a position that closes the opening. 1. An exhaust timing control device for a two-stroke engine, characterized in that the first control valve is provided with a collar projecting upward at the center of the swinging tip of the first control valve.