Internal-combustion engines – Poppet valve operating mechanism – With means for varying timing
Reexamination Certificate
2004-05-24
2008-12-02
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
With means for varying timing
C123S090150, C123S090170, C123S346000, C123S348000
Reexamination Certificate
active
07458347
ABSTRACT:
In an internal combustion engine equipped with a variable valve operating mechanism that performs a valve timing control and a valve lift amount control of at least one of an intake valve and an exhaust valve, target values of the valve timing and the valve lift amount set based on an engine operating condition are limited by a limit value to limit a control range of one of the valve timing and the valve lift amount in accordance with a control state of the other of the valve timing and the valve lift amount, so that the valve timing and the valve lift amount are controlled based on the respective target values one of which has been limited as above.
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Chang Ching
Foley & Lardner LLP
Hitachi , Ltd.
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