Variable valve operating control apparatus for internal...

Details Variable valve operating control apparatus for internal... Variable valve operating control apparatus for internal...

2006-03-14

2006-03-14

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090170, C123S090200, C123S090310

Reexamination Certificate

active

07011057

ABSTRACT:
A centric phase of an operating angle of an engine valve is detected on the basis of an interval between a reference rotational position of a crankshaft and a reference rotational position of a camshaft, and on the other hand, the centric phase is detected each predetermined time, and a Variable valve Timing Control mechanism is feedback-controlled on the basis of a value which has been updated more recently between both detected results.

REFERENCES:
patent: 6776130 (2004-08-01), Miyakoshi et al.
patent: 6920852 (2005-07-01), Machida
patent: 2000-297686 (2000-10-01), None
U.S. Appl. No. 11/065,521, filed Feb. 25, 2005, Machida et al.

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