ENGINE VALVE DRIVER - YAMAHA MOTOR CO LTD

Title:

ENGINE VALVE DRIVER

Document Type and Number:

WIPO Patent Application WO/2003/098013

Kind Code:

A1

Abstract:

An engine valve driver adapted to openingly and closingly drive a valve that opens and closes the valve opening in a combustion chamber by rocking a rocker arm (11) rockably supported by a rocker shaft (14), comprising a rocking member (9) driven for rocking by a rockably disposed drive means, an intermediate rocker member (10) disposed between a rocking cam surface (9b) formed on the rocking member (9) and a rocker pressing surface (11b) formed on the rocker arm (11) and adapted to transmit the motion of the rocking cam surface (9b) to the rocker pressing surface (11b), and an intermediate rocker moving mechanism for moving a point of contact between the rocking cam surface (9b) of the intermediate rocker member (10) and the rocker pressing surface (11b) by turning the rocker shaft (14), thereby making it possible to continuously adjust the valve opening period and the amount of lift.

Inventors:

FUJITA HIDEO (JP)
HATAMURA KOICHI (JP)

Application Number:

PCT/JP2003/006236

Publication Date:

November 27, 2003

Filing Date:

May 19, 2003

Export Citation:

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Assignee:

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

International Classes:

F01L1/14; F01L1/18; F01L1/26; F01L13/00; (IPC1-7): F01L13/00

Foreign References:

US5189998A	1993-03-02
US20010052329A1	2001-12-20
JPH1136833A	1999-02-09
US4572118A	1986-02-25
JP2003106123A	2003-04-09
JPS59500002A	1984-01-05

Other References: