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System and method for controlling hydraulic pressure in electro-hydraulic valve actuation systems

United States Patent

September 23, 2014
View the Complete Patent at the US Patent & Trademark Office
A control system for an engine includes a first lift control module and a second lift control module. The first lift control module increases lift of M valves of the engine to a predetermined valve lift during a period before disabling or re-enabling N valves of the engine. The second lift control module decreases the lift of the M valves to a desired valve lift during a period after enabling or re-enabling the N valves of the engine, wherein N and M are integers greater than or equal to one.
Brennan; Daniel G. (Brighton, MI), Marriott; Craig D. (Clawson, MI), Cowgill; Joel (White Lake, MI), Wiles; Matthew A. (Royal Oak, MI), Patton; Kenneth James (Howell, MI)
GM Global Technology Operations LLC (N/A)
12/ 910,212
October 22, 2010
STATEMENT OF GOVERNMENT RIGHTS This invention was produced pursuant to U.S. Government Contract No. DE-FC26-05 NT42415 with the Department of Energy (DoE). The U.S. Government has certain rights in this invention.