Control apparatus for variable valve apparatus and method...

Details Control apparatus for variable valve apparatus and method... Control apparatus for variable valve apparatus and method...

2007-12-18

2007-12-18

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090170, C123S090110

Reexamination Certificate

active

11049868

ABSTRACT:
An engine control unit diagnoses whether or not a unit that controls a variable valve apparatus is failed, and when it is diagnosed that the unit is failed, the engine control unit shuts off the power supply to a drive circuit for an actuator of the variable valve apparatus.

REFERENCES:
patent: 5024191 (1991-06-01), Nagahiro et al.
patent: 6073610 (2000-06-01), Matsumoto et al.
patent: 6135085 (2000-10-01), Toyohara et al.
patent: 6595172 (2003-07-01), Kabasin et al.
patent: 2001-254637 (2001-09-01), None

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