JPH0471757U

JPH0471757U -

Info

Publication number: JPH0471757U
Application number: JP11411990U
Authority: JP
Priority date: 1990-10-31
Filing date: 1990-10-31
Publication date: 1992-06-25
Anticipated expiration: 2005-10-31
Also published as: JP2538593Y2

Description

[Brief explanation of the drawing]

第１〜４図はこの考案の実施例を示し、第１図
は第４図の−線による要部拡大断面図、第２
図はシリンダヘツドの底面図、第３図は第２図の
−線による断面図、第４図は第３図の−
線による断面図である。第５図はこの考案の従来
技術を示すシリンダヘツドの冷却水通路を説明す
る要部拡大断面図である。図において、２はシリンダヘツド、４は吸気ポ
ート、６は排気ポート、８はウオータジヤケツト
、１０はポート形成部、１０−１は第１ポート形
成部、１０−２は第２ポート形成部、１２は凸部
、１４は冷却水通路、１４−１は上流側第１冷却
水通路、１４−２は下流側第２冷却水通路、１４
−３は狭窄部である。 Figures 1 to 4 show examples of this invention; Figure 1 is an enlarged sectional view of the main part taken along the - line in Figure 4;
The figure is a bottom view of the cylinder head, Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4 is a - line in Figure 3.
FIG. FIG. 5 is an enlarged sectional view of a main part illustrating a cooling water passage of a cylinder head showing the prior art of this invention. In the figure, 2 is a cylinder head, 4 is an intake port, 6 is an exhaust port, 8 is a water jacket, 10 is a port forming part, 10-1 is a first port forming part, 10-2 is a second port forming part, 12 is a convex portion, 14 is a cooling water passage, 14-1 is a first upstream cooling water passage, 14-2 is a downstream second cooling water passage, 14
-3 is the narrowing part.

Claims

[Scope of utility model registration request]

In the water jacket structure of the cylinder head, which is formed inside the cylinder head and allows cooling water to pass through to cool various parts, a port forming part is provided that protrudes into the water jacket and forms a constricted area, and the water passes through the port forming part. A water jacket structure for a cylinder head, characterized in that a convex portion is formed in the port forming portion to direct the flow direction of the cooling water to the downstream side.