System for controlling valve timing in event of failure

Details System for controlling valve timing in event of failure System for controlling valve timing in event of failure

2005-04-12

2005-04-12

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

06877468

ABSTRACT:
A valve timing control apparatus for an internal combustion engine is provided which is designed to ensure the drivability of the engine in the event of failure in operation of a variable valve timing control system made up of intake and exhaust side variable valve timing control mechanisms. If one of intake and exhaust side variable valve timing control mechanism has failed, the control apparatus actuates the other variable valve timing control mechanism to control the timing of opening and closing of a corresponding one of intake and exhaust valves so as to decrease an amount of overlap between the opening and closing of the intake and exhaust valves.

REFERENCES:
patent: 6301543 (2001-10-01), Fujiwara et al.
patent: 6305350 (2001-10-01), Livshiz et al.
patent: 6401675 (2002-06-01), Nakamura et al.
patent: 58-158335 (1983-09-01), None
patent: 01-110844 (1989-04-01), None
patent: 10-121999 (1998-05-01), None
patent: 11-36907 (1999-02-01), None

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