JPS6284646U

JPS6284646U -

Info

Publication number: JPS6284646U
Application number: JP17522885U
Authority: JP
Priority date: 1985-11-14
Filing date: 1985-11-14
Publication date: 1987-05-29
Anticipated expiration: 2000-11-14
Also published as: JPH0627815Y2

Description

[Brief explanation of the drawing]

第１図は本考案による冷却水通路構造を備えた
多気筒内燃機関のシリンダヘツドの部分的平断面
図、第２図乃至第４図は各々第１図の線―、
線―及び線―に沿う断面図である。１……シリンダブロツク、２……シリンダヘツ
ド、３……シリンダボア、４……ピストン、５…
…燃焼室、６，７……吸気ポート、８，９……排
気ポート、１０，１１……吸気弁、１２，１３…
…排気弁、１４，１５……ステムガイド、１６，
１７……圧縮コイルばね、１８，１９……バルブ
リフタ、２０……カム軸、２１……キヤツプ部材
、２２，２３……ステムガイド、２４，２５……
圧縮コイルばね、２６，２７……バルブリフタ、
２８……カム軸、２９……キヤツプ部材、３０…
…点火プラグ取り付けねじ孔、３１……点火プラ
グ、３２……中央最上部壁、３３……点火プラグ
ホール、３４……筒状部、３５……筒状壁、３６
……シリンダヘツドカバー、３７……点火プラグ
着脱作業ホール、３８……冷却水通路、３９ａ〜
３９ｃ……連通孔、４０……シリンダヘツド内下
部冷却水通路、４１……シリンダヘツド内上部冷
却水通路、４２……中間隔壁、４３……連通孔。 FIG. 1 is a partial plan cross-sectional view of a cylinder head of a multi-cylinder internal combustion engine equipped with a cooling water passage structure according to the present invention, and FIGS. 2 to 4 are respectively taken along the lines shown in FIG.
FIG. 1... Cylinder block, 2... Cylinder head, 3... Cylinder bore, 4... Piston, 5...
...Combustion chamber, 6,7...Intake port, 8,9...Exhaust port, 10,11...Intake valve, 12,13...
...Exhaust valve, 14, 15...Stem guide, 16,
17... Compression coil spring, 18, 19... Valve lifter, 20... Camshaft, 21... Cap member, 22, 23... Stem guide, 24, 25...
Compression coil spring, 26, 27...valve lifter,
28...Camshaft, 29...Cap member, 30...
... Spark plug mounting screw hole, 31 ... Spark plug, 32 ... Center top wall, 33 ... Spark plug hole, 34 ... Cylindrical part, 35 ... Cylindrical wall, 36
...Cylinder head cover, 37...Spark plug attachment/removal work hole, 38...Cooling water passage, 39a~
39c...Communication hole, 40...Lower cooling water passage in the cylinder head, 41...Upper cooling water passage in the cylinder head, 42...Middle partition wall, 43...Communication hole.

Claims

[Claims for Utility Model Registration] (1) A lower cooling water passage in the cylinder head extending from the head of the combustion chamber across the head wall thereof, and an intermediate partition wall for the lower cooling water passage in the cylinder head. A plurality of communication holes extending along the cylinder arrangement direction between the intake valve support part and the exhaust valve support part, and are provided in the middle partition wall and spaced apart from each other in the cylinder arrangement direction, allow communication within the cylinder head. A cooling water passage structure in a cylinder head of a multi-cylinder internal combustion engine, which has an upper cooling water passage in the cylinder head communicating with a lower cooling water passage. (2) In the cooling water passage structure of the cylinder head of a multi-cylinder internal combustion engine according to claim 1 of the utility model registration claim, a spark plug is provided in the communication hole at the center of the head of the combustion chamber of each cylinder. A cooling water passage structure characterized by being provided surrounding the outer periphery of a cylindrical part of a hole. (3) In the cooling water passage structure of the cylinder head of a multi-cylinder internal combustion engine according to claim 1 or 2 of the utility model registration claim, the lower cooling water passage surface in the cylinder head of the intermediate partition is located at the top of the combustion chamber. A cooling water passage structure extending substantially parallel to a lower cooling water passage surface in a cylinder head of a part wall.