Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Reexamination Certificate
2005-04-26
2005-04-26
Look, Edward K. (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
C123S090110, C123S090150, C251S058000, C251S129200, C091S368000, C091S384000
Reexamination Certificate
active
06883474
ABSTRACT:
An electrohydraulic valve actuator assembly for an engine includes a movable engine valve, a movable spool valve, and a driving channel interconnecting the spool valve and the engine valve. The electrohydraulic valve actuator assembly includes an actuator operatively cooperating with the spool valve to position the spool valve to prevent and allow fluid flow in and out of the driving channel to position the engine valve. The electrohydraulic valve actuator assembly further includes a mechanical feedback interconnecting the engine valve and the spool valve to control the position of the spool valve.
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General Motors Corporation
Look Edward K.
Marra Kathryn A.
Riddle Kyle M.
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