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Integrated hydraulic cooler and return rail in camless cylinder head

United States Patent

December 13, 2011
View the Complete Patent at the US Patent & Trademark Office
An engine assembly may include a cylinder head defining an engine coolant reservoir, a pressurized fluid supply, a valve actuation assembly, and a hydraulic fluid reservoir. The valve actuation assembly may be in fluid communication with the pressurized fluid supply and may include a valve member displaceable by a force applied by the pressurized fluid supply. The hydraulic fluid reservoir may be in fluid communication with the valve actuation assembly and in a heat exchange relation to the engine coolant reservoir.
Marriott; Craig D. (Clawson, MI), Neal; Timothy L. (Ortonville, MI), Swain; Jeff L. (Flushing, MI), Raimao; Miguel A. (Colorado Springs, CO)
GM Global Technology Operations LLC (Detroit, MI)
12/ 209,580
September 12, 2008
GOVERNMENT LICENSE RIGHTS The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Government Program Number DE-FC26-05NT42415 for the High Energy Clean Combustion Project awarded by the U.S. Department of Energy.