Patent Number: 6,837,196

Title: Engine valve actuator assembly with automatic regulation

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.

Inventors: Sun; Zongxuan (Troy, MI)

Assignee: General Motors Corporation

International Classification: F01L 9/02 (20060101); F01L 9/00 (20060101); F01L 009/02 ()

Expiration Date: 1/04/02017