INTAKE PORT STRUCTURE OF INTERNAL COMBUSTION ENGINE

Title:

INTAKE PORT STRUCTURE OF INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JP2005120998

Kind Code:

A

Abstract:

To provide an intake port structure of an internal combustion engine capable of suppressing decrease in flow coefficient.

In an intake port structure of an internal combustion engine, an intake port 10 has a vertical passage 12 vertically extending to a combustion chamber top surface 2 so as to open to it and a tilt passage 11 communicating with the vertical passage 12 and extending in the direction tilted in a vertical direction of the combustion chamber top surface 2. A recess 21 is formed in a tilt wall surface 11a which is a lower wall surface of the tilt passage 11. In the recess 21, an end of the combustion chamber side is extended to the boundary D between the tilt passage 11 and the vertical passage 12 so as to be gradually widened toward the combustion chamber side. The end of the combustion chamber side in the recess 21 is provided with a connecting surface 22 in which an edge 31 is formed with respect to a vertical wall surface 12a of the vertical passage 12 to be connected.

Inventors:

KATAYAMA SHIKIO
OKUMURA TAKESHI
TAKAMIYA FUMIRO
NAKAWATASE AKIRA
HASHIZUME HIDESHI

Application Number:

JP2003360030A

Publication Date:

May 12, 2005

Filing Date:

October 20, 2003

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

F02B17/00; F02F1/42; (IPC1-7): F02F1/42; F02B17/00

Attorney, Agent or Firm:

Hironobu Onda
Makoto Onda

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