Variable valve timing apparatus

Details Variable valve timing apparatus Variable valve timing apparatus

2007-02-21

2011-10-25

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

08042503

ABSTRACT:
In a variable valve timing apparatus having a VVT mechanism in each of a plurality of banks, start of a valve timing control is not permitted until reference position learning of valve timing is completed in the corresponding bank and in other banks. Accordingly, the plurality of banks come to have matching valve timing setting at the time of valve timing control, whereby variation in the amount of air introduced to cylinders can be suppressed, and satisfactory combustion characteristics can be maintained.

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Japanese Office Action for corresponding Application No. 2006-094881, dated Jun. 21, 2011.

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