Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1996-10-16
1997-12-02
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9039, 123 9051, F01L 1300, F01L 118
Patent
active
056924658
ABSTRACT:
A main rocker arm is supported for swinging motion to operate one of the intake and exhaust valves of an internal combustion engine. A high-speed rocker arm is supported on the main rocker arm for swinging motion according to rotation of a high-speed cam rotating in synchronism with engine rotation. The high-speed rocker arm has a slip surface for engagement with the high-speed cam. The high-speed rocker arm is drivingly connected to the main rocker arm for swinging motion in unison with the main rocker arm when the engine is operating at a high speed. The driving connection is released to permit swinging motion of the main rocker arm according to rotation of a low-speed cam independently of the swinging motion of the high-speed rocker arm when the engine is operating at a low speed. The slip surface of the high-speed rocker arm is made of an alloy tool steel having carbide deposited and dispersed to provide a hardness of HRC55 or more to the slip surface. A hard coat is formed through physical vapor deposition on the slip surface of the high-speed rocker arm.
REFERENCES:
patent: 4476824 (1984-10-01), Reinke et al.
patent: 4485770 (1984-12-01), Saka et al.
patent: 4870931 (1989-10-01), Nakamura et al.
patent: 4873150 (1989-10-01), Doi et al.
patent: 5195473 (1993-03-01), Kano et al.
patent: 5445116 (1995-08-01), Hara
patent: 5452694 (1995-09-01), Hara
Ehira Atsushi
Kano Makoto
Morita Shoji
Sawada Takanori
Takemura Shinichi
Lo Weilun
Nissan Motor Co,. Ltd.
Unisia Jecs Corporation
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