Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1994-11-22
1996-05-14
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9022, F01L 1300
Patent
active
055158200
ABSTRACT:
A valve operating mechanism for an internal combustion engine for varying the operation of the valve dependent on engine operating conditions. A first rocker arm movable to follow a first cam and a second rocker arm movable to follow a second cam corresponding to a higher speed operating condition than that of the first cam are pivotally supported on a rocker arm shaft. A first connection switching device capable of switching the connection and disconnection between the third and first rocker arms and a second switching device capable of switching the connection and disconnection between at least one of the first and third rocker arms and the second rocker arm independently from the first connection switching device, are disposed at locations displaced circumferentially relative to the rocker arm shaft. Thus, it is possible to dispose a trigger mechanism and to dispose3 roller followers coaxially with the connection switching device, while avoiding the increase in width of the three rocker arms along their swinging axes.
REFERENCES:
patent: 4612884 (1986-09-01), Ajiki et al.
patent: 4869214 (1989-09-01), Inoue et al.
patent: 4887563 (1989-12-01), Ishida et al.
patent: 5042437 (1991-08-01), Sakuragi et al.
patent: 5085182 (1992-02-01), Nakamura et al.
Kajiwara Shigemasa
Kinoshita Masakazu
Saito Hideki
Sugimoto Chihaya
Sugiyama Izumi
Honda Giken Kogyo Kabushiki Kaisha
Lo Weilun
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