Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2008-02-21
2011-11-08
Eshete, Zelalem (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090480
Reexamination Certificate
active
08051814
ABSTRACT:
A simpler configuration of a mechanism for stopping intake/exhaust valves opened/closed by a valve opening/closing mechanism of a rocker arm. An engine E includes an exhaust valve for opening/closing an exhaust port of an exhaust path with a first exhaust valve spring for energizing the exhaust valve in a valve closing direction. An exhaust valve drive cam is rotated in correspondence with the rotation of an engine crankshaft. A rocker arm is swingably provided between the exhaust valve and the exhaust valve drive cam with one end that abuts on the exhaust valve drive cam being pressed according to rotation of the exhaust valve drive cam and swinging to press the exhaust valve by a press member at the other end to move to the open side. An exhaust valve stopping mechanism is provided between the press member of the rocker arm and the exhaust valve.
REFERENCES:
patent: 6076491 (2000-06-01), Allen
patent: 2006/0081213 (2006-04-01), Yang et al.
patent: 2006/0213470 (2006-09-01), Maehara et al.
patent: 1260443 (2000-07-01), None
patent: 1020619 (2000-07-01), None
patent: 61-201808 (1986-09-01), None
Hirayama Taku
Maehara Hayato
Tsukui Takaaki
Birch & Stewart Kolasch & Birch, LLP
Eshete Zelalem
Honda Motor Co. Ltd.
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