Controller for controlling valve operating characteristic in...

Details Controller for controlling valve operating characteristic in... Controller for controlling valve operating characteristic in...

2006-09-05

2006-09-05

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

07100554

ABSTRACT:
A controller for controlling valve timing imbalance between cylinder groups of an engine. For each cylinder group, the controller has a variable mechanism for varying the valve timing. A lock mechanism locks the variable mechanism so as to maintain the valve timing of the cylinder group at a lock value. An ECU sets a valve timing target value based on the operating condition of the engine. The ECU and an oil control valve drive the variable mechanism. The ECU restricts the valve timing target value of at least one of the variable mechanisms of which operation is unlocked when the operation of at least one of the variable mechanisms is locked so that difference between the target value and the lock value decreases.

REFERENCES:
patent: 6330870 (2001-12-01), Inoue et al.
patent: 04-063922 (1992-02-01), None
patent: 2000-227034 (2000-08-01), None
patent: 2001-055935 (2001-02-01), None
patent: 2003-041994 (2003-02-01), None

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