Valve timing control device and control method for internal...

Details Valve timing control device and control method for internal... Valve timing control device and control method for internal...

2008-01-08

2008-01-08

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S347000

Reexamination Certificate

active

11528346

ABSTRACT:
A valve timing control device is provided, allowing downsizing of an electric motor that drives a variable mechanism of valve timing. An electronic control device drives a VVT drive electric motor with a crankshaft rotated towards reducing the cam torque qualified as a resistance through a motor generator when a valve timing modification request is made in preparation to engine startup.

REFERENCES:
patent: 5181484 (1993-01-01), Kan et al.
patent: 6619248 (2003-09-01), Bertelshofer et al.
patent: 2002/0010540 (2002-01-01), Moriya et al.
patent: 1 143 113 (2001-10-01), None
patent: A 63-268960 (1988-11-01), None
patent: A 11-159311 (1999-06-01), None
patent: A 2004-270488 (2004-09-01), None
patent: 2004-308570 (2004-11-01), None
Japan Institute of Invention and Innovation Technical Report, No. 2004-504520, Jul. 1, 2004.

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