JPS6354819U

JPS6354819U -

Info

Publication number: JPS6354819U
Application number: JP14911786U
Authority: JP
Priority date: 1986-09-29
Filing date: 1986-09-29
Publication date: 1988-04-13

Description

[Brief explanation of the drawing]

第１図は本考案によるピストン冷却装置の一実
施例を示す概略構成図、第２図は第１図の要部を
示す拡大断面図、第３図および第４図は本考案に
よるピストン往復動時の作動状態を示す説明図、
第５図は本考案によるピストン冷却装置の他の実
施例を示す要部の拡大断面図である。１…ピストン、１ｃ…ガイド通路、３…クラン
クケース、５…シリンダ、７…ロツカカバー、８
…エアクリーナ、９…オイルポンプ、１０…流体
導入管、１１…逆止弁、１２…噴射ノズル、１３
…還流通路、１４…逆止弁、１５…オイル供給管
。 Fig. 1 is a schematic configuration diagram showing an embodiment of a piston cooling device according to the present invention, Fig. 2 is an enlarged sectional view showing the main part of Fig. 1, and Figs. 3 and 4 are reciprocating piston movements according to the present invention. An explanatory diagram showing the operating state at the time,
FIG. 5 is an enlarged sectional view of the main parts of another embodiment of the piston cooling device according to the present invention. 1...Piston, 1c...Guide passage, 3...Crankcase, 5...Cylinder, 7...Rock cover, 8
...Air cleaner, 9...Oil pump, 10...Fluid introduction pipe, 11...Check valve, 12...Injection nozzle, 13
...Return passage, 14...Check valve, 15...Oil supply pipe.

Claims

[Claims for Utility Model Registration] (1) In an internal combustion engine in which blow-by gas is guided to an air cleaner, the back side of the top of the piston of the internal combustion engine is formed into a smooth curved surface, and the inside of the skirt portion of the piston is formed into a smooth curved surface. A guide passage is integrally formed on the circumferential surface, parallel to the direction of movement of the piston, with one end opening on the back side of the top of the piston and the other end slidably fitting into a nozzle fixed to the crankcase side, A piston cooling device characterized in that a fluid introduction pipe for supplying outside air from an air cleaner via a check valve is connected to the nozzle on the crankcase side, so that the outside air is circulated to the air cleaner together with blow-by gas. . (2) A part of the engine lubricating oil pumped from the oil pump is mixed with the fluid introduction pipe that supplies outside air from the air cleaner via the check valve, and the outside air and oil are mixed through the nozzle at the tip of the fluid introduction pipe. The piston cooling device according to claim 1, characterized in that it is configured to supply a mixed fluid.