Gm Global Technolgoy Operations, Inc.

Kenneth James Patton

Craig D Marriott

Thomas A Spix

Daniel G Brennan

Joel Cowgill

Matthew A Wiles

Michael B Fleck

An engine assembly includes an engine block at least partially defining a combustion chamber and a crankcase volume. The engine block defines an opening in fluid communication with the crankcase volume. An air-oil separator is mounted to the engine block at the opening and is configured to separate oil from blowby gasses flowing from the crankcase volume through the air-oil separator. A method of venting an engine crankcase volume is also included.

Engine assembly with engine block-mounted air-oil separator and method of ventilating an engine crankcase

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.

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

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Howell, MI, United States of America

Kenneth James Patton