VALVE GEAR OF INTERNAL COMBUSTION ENGINE

Title:

VALVE GEAR OF INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2005/019609

Kind Code:

A1

Abstract:

A valve gear of an internal combustion engine, wherein a swing cam performs reciprocating motion by swinging about a swing shaft in a specified range, and a rocker arm performs reciprocating motion by swinging interlockingly with the swing cam in a specified range. A roller for interlocking the swing of the swing cam with the rocker arm is fitted to the rocker arm, and a cam face in contact with the roller is formed on the swing cam. When the roller is positioned at the base circular part of the cam face, a clearance is formed between parts on the downstream side of the contact portion of the roller with the cam face in a force transmitting route. The valve gear comprises a spring member to always bring the roller into contact with the cam face while the swing cam and the rocker arm perform the reciprocating operation.

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Inventors:

HATAMURA KOICHI (JP)
FUJITA HIDEO (JP)

Application Number:

PCT/JP2004/012192

Publication Date:

March 03, 2005

Filing Date:

August 25, 2004

Export Citation:

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Assignee:

YAMAHA MOTOR CO LTD (JP)
HATAMURA KOICHI (JP)
FUJITA HIDEO (JP)

International Classes:

F01L13/00; F01L1/18; (IPC1-7): F01L1/20; F01L13/00

Foreign References:

JPS634313U	1988-01-12
JPS63309707A	1988-12-16
JPH09268907A	1997-10-14

Other References: