Engine valve actuator assembly with automatic regulation

Details Engine valve actuator assembly with automatic regulation Engine valve actuator assembly with automatic regulation

2005-01-04

2005-01-04

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C123S090150

Reexamination Certificate

active

06837196

ABSTRACT:
A valve actuator assembly for an engine includes a movable engine valve, a movable first spool valve, and a movable second spool valve. The valve actuator assembly also includes a driving channel interconnecting the second spool valve and the engine valve, an intermediate channel interconnecting the first spool valve and the second spool valve, and a feedback channel interconnecting the second spool valve and the engine valve. The valve actuator assembly includes an actuator operatively cooperating with the first spool valve to position the first spool valve to prevent and allow fluid flow in and out of the second spool valve and the driving channel to position the engine valve. The valve actuator assembly further includes an on/off valve in fluid communication with the feedback channel to enable and disable the feedback channel to control motion of the second spool valve.

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