Oil circuit for continuous variable valve timing device

Details Oil circuit for continuous variable valve timing device Oil circuit for continuous variable valve timing device

2008-12-17

2011-10-11

Eshete, Zelalem (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Lubrication

C123S090150, C123S090170, C123S090310

Reexamination Certificate

active

08033258

ABSTRACT:
An oil circuit for a continuous variable valve timing (CVVT) device includes a main oil passage from a cylinder block toward a cylinder head to feed oil from a main gallery to a cam shaft, and a control oil passage branching off from the main oil passage on a side of the cylinder block and formed so as to feed the oil from the main oil passage to the continuous variable valve timing devices via an intake-side oil control valve and an exhaust-side oil control valve. The oil is fed to the cam shaft, the intake-side CVVT device, the exhaust-side CVVT device and a timing chain tensioner at one time. Thereby, the hydraulic pressure the hydraulic pressure applied to two cam shafts can be equally maintained, and the tension of a belt or a chain can be simultaneously regulated so as to improve the driving force of a crank.

REFERENCES:
patent: 6662771 (2003-12-01), Kobayashi
patent: 6823825 (2004-11-01), Hwang et al.
patent: 04-301112 (1992-10-01), None
patent: 1020050064047 (2005-06-01), None
patent: 1020060000641 (2006-01-01), None
patent: 100783540 (2007-12-01), None

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