JPH0484706U

JPH0484706U -

Info

Publication number: JPH0484706U
Application number: JP12805390U
Authority: JP
Priority date: 1990-11-29
Filing date: 1990-11-29
Publication date: 1992-07-23

Description

[Brief explanation of the drawing]

第１図は内燃機関のシリンダヘツド４部分の側
面断面図、第２図は始動時通路２７の部分に円筒
状の還流防止弁７を介装した実施例の側面断面図
、第３図は第２図の実施例の内燃機関が転倒した
状態の側面断面図、第４図は保持バネ８により内
燃機関が転倒して還流防止弁７が閉鎖した状態で
保持する実施例の側面断面図、第５図は保持バネ
８の斜視図、第６図は転倒した状態の側面断面図
、第７図は保持バネの他の実施例を示す側面断面
図、第８図は転倒した状態の側面断面図、第９図
は保持バネ１８の斜視図、第１０図は弁腕室と吸
気ポート２９とを始動時通路２７を介して連通し
た構成を示す第１図のＸ−Ｘ矢視断面図である。１……ボンネツト、２……逆止弁、３……始動
補助プランジヤ、４……シリンダヘツド、６……
還流通路、７……還流防止弁、８……保持バネ、
９……ロツカーアーム、２７……始動時通路、２
８……連通路、２９……吸気ポート。 FIG. 1 is a side sectional view of the cylinder head 4 of an internal combustion engine, FIG. 2 is a side sectional view of an embodiment in which a cylindrical reflux prevention valve 7 is interposed in the starting passage 27, and FIG. FIG. 2 is a side sectional view of the embodiment in which the internal combustion engine is in an overturned state; FIG. 5 is a perspective view of the holding spring 8, FIG. 6 is a side sectional view of the holding spring in an overturned state, FIG. 7 is a side sectional view showing another embodiment of the holding spring, and FIG. 8 is a side sectional view of the holding spring in an overturned state. , FIG. 9 is a perspective view of the holding spring 18, and FIG. 10 is a sectional view taken along the line X-X in FIG. . 1...Bonnet, 2...Check valve, 3...Starting assist plunger, 4...Cylinder head, 6...
Reflux passage, 7... Reflux prevention valve, 8... Holding spring,
9...Rotzker arm, 27...Passage at startup, 2
8...Communication path, 29...Intake port.

Claims

[Scope of utility model registration request]

A breather mechanism A having a built-in check valve 2 is formed on the side wall of a bonnet forming a valve arm chamber of the internal combustion engine, and a starting passage 27 for lubricating oil at starting is provided, and the starting passage 27 and the breather mechanism A are provided. In a configuration in which the internal combustion engine is in communication with the
A breather passage blocking device in the event of an engine overturn, characterized in that a valve mechanism for preventing oil from flowing into a combustion chamber is provided in a portion that serves both as a starting passage and a breather passage.