JPH0240927U

JPH0240927U -

Info

Publication number: JPH0240927U
Application number: JP11974788U
Authority: JP
Priority date: 1988-09-14
Filing date: 1988-09-14
Publication date: 1990-03-20

Description

[Brief explanation of drawings]

第１図は第３図の−線断面図、第２図は第
１図の−線断面図、第３図はエンジンの側面
図である。１……シリンダ、１０……ボア、１２……排気
通路、１４……流入室、１５……上部水室、１６
……縦連通路、１７……下部水室、１８……縦水
室、２０ａ〜２０ｎ……ボス、２１……ねじ穴、
２１ａ，２１ｂ……絞り部。 1 is a cross-sectional view taken along the line -- in FIG. 3, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 3 is a side view of the engine. 1...Cylinder, 10...Bore, 12...Exhaust passage, 14...Inflow chamber, 15...Upper water chamber, 16
... Vertical communication passage, 17 ... Lower water chamber, 18 ... Vertical water chamber, 20a to 20n ... Boss, 21 ... Screw hole,
21a, 21b...Aperture section.

Claims

[Claims for Utility Model Registration] 1. In a water jacket for a two-stroke engine, in which a water chamber is provided surrounding the bore of the cylinder, and cooling water is allowed to flow through the water chamber, the water jacket crosses above the exhaust passage of the cylinder. A cooling water inflow chamber is provided, the inflow chamber is communicated with an upper water chamber surrounding the upper part of the bore through a constriction part, the inflow chamber is communicated with a lower water chamber surrounding the lower part of the bore through a vertical communication passage, and the upper water A water jacket for a two-stroke engine, characterized in that the chamber and lower water chamber are connected through a vertical water chamber. 2. Claim 1, wherein a part of the wall of the cylinder projects into the upper water chamber to form the constricted part, and the projecting part is provided with a screw hole for mounting the cylinder head to serve as a mounting boss. Water jacket for the two-stroke engine described.