Internal-combustion engines – Poppet valve operating mechanism – Rocker
Patent
1996-09-19
1998-05-19
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Rocker
123 9027, 123 9031, F01L 118
Patent
active
057524793
ABSTRACT:
A number of embodiments of valve actuating mechanisms for four-cycle engines including a camshaft and a rocker arm actuated by the camshaft for operating an associated poppet valve. The camshaft and rocker arm followers are configured so as to provide an increasing lever ratio on valve opening for effective rapid valve opening and a decreased lever ratio on valve closing so as to avoid valve bounce. Various arrangements of camshafts and rocker arm positions are disclosed.
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European Search Report dated Feb. 28, 1994.
Kinoshita Hisatoshi
Tsuchida Naoki
Lo Weilun
Yamaha Hatsudoki Kabushiki Kaisha
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