Variable valve timing apparatus and control method therefor

Details Variable valve timing apparatus and control method therefor Variable valve timing apparatus and control method therefor

2007-03-22

2011-11-01

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

08047169

ABSTRACT:
An ECU executes a program including the steps of: controlling, when the phase of an intake valve is a phase advanced relative to a threshold value CA (FF) (NO in S106), an electric motor operating an intake VVT mechanism by feedback control (S202); and controlling, when the phase of the intake valve is a phase retarded relative to the threshold value CA (FF) (YES in S106), the electric motor by feed-forward control (S200). Under the feed-forward control, a duty command value is output that is smaller than an upper limit of a duty command value under the feedback control.

REFERENCES:
patent: 6032623 (2000-03-01), Yamagishi et al.
patent: 2002/0189563 (2002-12-01), Muraki et al.
patent: 2005/0061276 (2005-03-01), Ichimura et al.
patent: 2005/0061278 (2005-03-01), Schafer et al.
patent: 2005/0103298 (2005-05-01), Schafer et al.
patent: 2006/0124091 (2006-06-01), Shikata et al.
patent: 2007/0113806 (2007-05-01), Ezaki et al.
patent: 1 426 568 (2004-06-01), None
patent: 9-256878 (1997-09-01), None
patent: 10103029 (1998-04-01), None
patent: 11002142 (1999-06-01), None
patent: 2004-150397 (2004-05-01), None
patent: 2004-257249 (2004-09-01), None
patent: 2005-048706 (2005-02-01), None
patent: 2005-048707 (2005-02-01), None
patent: 2005-098142 (2005-04-01), None
patent: 2005-180238 (2005-07-01), None
patent: 2005-525495 (2005-08-01), None
patent: 2005-532502 (2005-10-01), None
Japanese Office Action for corresponding Japanese Patent Application No. 2006-157600 mailed Dec. 21, 2010.
Japanese Office Action dated Jun. 28, 2011, issued in Japanese Patent Application No. 2006-157600 with English translation.

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