Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Patent
1994-01-18
1995-10-24
Yuen, Henry C.
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
123 9023, F01L 1300
Patent
active
054601304
ABSTRACT:
An SOHC-type valve operating system in an internal combustion engine having a single cam shaft commonly provided for a pair of intake valves and a pair of exhaust valves. A plurality of intake valve driving members are rockably disposed between the cam shaft and the pair of intake valves and have an operative-connection switchover mechanism for switching over the connection and disconnection of the intake valve driving members. A pair of exhaust valve driving members are rockably disposed between the cam shaft and the pair of exhaust valves and independently operate each of the exhaust valves. The operative-connection switchover mechanism includes a switchover pin movable between a position for operatively connecting adjacent intake valve driving members and a position for releasing such connection, which pin is slidably mounted in a cylindrical sleeve secured to the intake valve driving members for guiding the movement of the switchover pin. The cylindrical sleeve also rotatably supports a cylindrical rotor in rolling contact with a cam provided on the cam shaft. The operative-connection switchover mechanism is disposed on the opposite side of the intake valves with respect to the rocking axis of the intake valve driving member whereby space for disposing a component such as an ignition plug is available on the intake side of the engine.
REFERENCES:
patent: 4768475 (1988-09-01), Ikemura
patent: 5101777 (1992-04-01), Onishi et al.
patent: 5101778 (1992-04-01), Fukuo et al.
patent: 5207193 (1993-05-01), Sugimoto et al.
Arai Hidemi
Fujiyoshi Yoshihiro
Fukuo Koichi
Fukuzawa Masami
Kobayashi Masayuki
Honda Giken Kogyo Kabushiki Kaisha
Lo Weilun
Yuen Henry C.
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