Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2007-06-15
2009-02-03
Eshete, Zelalem (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090170, C123S090310
Reexamination Certificate
active
07484485
ABSTRACT:
A VVA apparatus includes a control shaft arranged rotatable in accordance with the engine operating conditions, an alteration mechanism for changing a lift amount and an operating angle of an engine valve in accordance with rotation of the control shaft, and a drive mechanism for rotating the control shaft and including an electric motor and a reduction mechanism. The reduction mechanism has a reduction ratio set to be larger when the valve is under small lift-amount and operating-angle control than when the valve is under large lift-amount and operating-angle control.
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Search Report for French Application 03 09 863 dated Sep. 22, 2008.
Nakamura Makoto
Yamada Yoshihiko
Eshete Zelalem
Foley & Lardner LLP
Hitachi , Ltd.
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