Switchable valvetrain system and method of operation

Details Switchable valvetrain system and method of operation Switchable valvetrain system and method of operation

2007-08-01

2010-11-02

Chang, Ching (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C123S090130, C137S625000

Reexamination Certificate

active

07823549

ABSTRACT:
A switchable valvetrain system is provided having a control unit and a pressure regulator valve responsive to control signals from the control unit. A pressurized fluid source is provided in communication with the pressure regulator valve. A switchable valvetrain component having a latching mechanism and lubrication circuit in selective communication with the pressurized fluid source through the pressure regulator valve is also provided. The pressure regulator valve is operable to selectively and variably communicate fluid pressure from the pressurized fluid source to the latching mechanism and the lubrication circuit in response to control signals from the control unit. A method of operating the switchable valvetrain system is also provided.

REFERENCES:
patent: 4167931 (1979-09-01), Iizuka
patent: 5680841 (1997-10-01), Hu
patent: 7004122 (2006-02-01), Cornell et al.
patent: 7086374 (2006-08-01), McDonald et al.
patent: 2333322 (1999-07-01), None

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