Engine valve drive device

Details Engine valve drive device Engine valve drive device

1995-08-31

1996-11-05

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9036, 123 9044, F01L 1300

Patent

active

055706649

ABSTRACT:
A rocker arm is provided free to pivot on a rocker shaft fixed to an engine. A valve that opens and closes according to the oscillation of this rocker arm, and a cam that causes this rocker arm to oscillate in synchronism with the engine, are also provided. A thrust fin projecting in a radial direction is formed in a one-piece construction with the rocker and is narrower than the rocker arm. A guide groove engaging with the thrust fin is formed on the engine so as to prevent the rocker arm from displacing in the axial direction of the rocker shaft. As the width of the guide groove is small, it can be formed easily and with high precision by cutting a part of the engine with an end mill.

REFERENCES:
patent: 4791893 (1988-12-01), Muranaka et al.
patent: 5152267 (1992-10-01), Komatsu et al.
patent: 5183015 (1993-02-01), Morita et al.
patent: 5297516 (1994-03-01), Hara

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