JPS581745U

JPS581745U - Gasoline engine startup pressure reducing device

Info

Publication number: JPS581745U
Application number: JP9578381U
Authority: JP
Inventors: 古沢　隆嗣
Original assignee: 富士重工業株式会社
Priority date: 1981-06-27
Filing date: 1981-06-27
Publication date: 1983-01-07

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す上死点時の縦断面図、
第２図および第３図は同減圧開始時および減圧終了時の
要部の縦断面図、第４図は本考案の一実施例のものを従
来のものと比較して示す作動説明図、第５図は本考案の
一実施例のものと従来のものとを比較して示す始動時に
おける圧縮行程の作用説明図である。１・・・シリンダ、２・・・ガスケット、３・・・シリ
ンダヘッド、４・・・点火栓、５・・・ピストン、６・
・・ピストンピン、７・・・コンロッド、８・・・排気
口、９・・・上小孔、１０・・・縦小孔、１１・・・下
小孔、１２・・・切欠溝、１３・・・盲栓、１４・・・
減圧通路、１５・・・起動時減圧室。FIG. 1 is a longitudinal sectional view at top dead center showing an embodiment of the present invention;
2 and 3 are longitudinal cross-sectional views of the main parts at the start and end of decompression, FIG. FIG. 5 is an explanatory diagram of the operation of the compression stroke at the time of starting, showing a comparison between one embodiment of the present invention and a conventional one. 1... Cylinder, 2... Gasket, 3... Cylinder head, 4... Spark plug, 5... Piston, 6...
... Piston pin, 7... Connecting rod, 8... Exhaust port, 9... Upper small hole, 10... Vertical small hole, 11... Lower small hole, 12... Notch groove, 13 ...Blind stopper, 14...
Decompression passage, 15... Decompression chamber at startup.

Claims

[Scope of utility model registration request]

A decompression passage with a small cross-sectional area that opens on the cylinder inner circumferential surface only during a certain period of time during the compression stroke from the end of exhaust until the piston reaches top dead center is surrounded by the piston, cylinder, and piston pin. A device for reducing pressure at startup of a gasoline engine, characterized in that the device communicates with a pressure reducing chamber.