Variable valve timing controller for internal combustion engine

Details Variable valve timing controller for internal combustion engine Variable valve timing controller for internal combustion engine

2005-08-16

2005-08-16

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090170, C464S160000

Reexamination Certificate

active

06928968

ABSTRACT:
When a target advance angle VTT1of an intake valve is a threshold K1or less and when a target retard angle VTT2of an exhaust valve is a threshold K2or less, an intake-side variable valve timing device and an exhaust-side variable valve timing device are turned into a base mode. When a target advance angle VTT1of an intake valve exceed the threshold K1or when the target retard angle VTT2of an exhaust valve exceeds the threshold K2, both of the variable valve timing devices are turned into a feedback mode at the same time.

REFERENCES:
patent: 6397800 (2002-06-01), Nohara et al.
patent: 6405694 (2002-06-01), Sato
patent: 2001/0025615 (2001-10-01), Nohara et al.
patent: 2001/0050067 (2001-12-01), Sato

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