Oil supply circuit for cylinder deactivation system

Details Oil supply circuit for cylinder deactivation system Oil supply circuit for cylinder deactivation system

2007-01-24

2008-09-23

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C123S090130, C123S090310, C123S090480

Reexamination Certificate

active

07426912

ABSTRACT:
An oil supply circuit for a cylinder deactivation system having a simple structure and capable of being installed at a cylinder head without needing additional extraneous elements by forming an oil line within a cam shaft. An embodiment may include a hydraulic pump, a plurality of tappets for controlling opening of intake and exhaust valves, a first oil circuit connected to the hydraulic pump through an oil supply line and supplying a high pressure oil to the tappets, and a second oil circuit connected to the hydraulic pump and supplying an oil to the tappets. The second oil circuit includes an oil line formed in a hollow space of the cam shaft.

REFERENCES:
patent: 4794893 (1989-01-01), Masuda et al.
patent: 5645022 (1997-07-01), Yamamoto et al.

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