Variable valve timing control apparatus of internal...

Details Variable valve timing control apparatus of internal... Variable valve timing control apparatus of internal...

2008-06-24

2010-11-09

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

C123S090150, C123S090310

Reexamination Certificate

active

07827949

ABSTRACT:
A variable valve timing control apparatus employs a five-blade vane member fixedly connected to a camshaft end and rotatably disposed in a phase-converter housing formed integral with a sprocket driven by an engine crankshaft. Five phase-retard chambers and five phase-advance chambers are defined by five blades of the vane member and the housing, for creating a phase change of the vane member relative to the housing. A circumferential width of each of a first pair of blades, located on both sides of a first blade having a maximum circumferential width, is dimensioned to be less than a circumferential width of each of a second pair of blades, circumferentially spaced apart from the first blade rather than the first pair. The circumferential width of each of the second pair of blades is dimensioned to be less than the maximum circumferential width of the first blade.

REFERENCES:
patent: 6006708 (1999-12-01), Ken et al.
patent: 2001/0039932 (2001-11-01), Sekiya et al.
patent: 2003/0164149 (2003-09-01), Kondou et al.
patent: 2002-030908 (2002-01-01), None

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