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Method and apparatus for active control of combustion rate through modulation of heat transfer from the combustion chamber wall

United States Patent

6,792,899
September 21, 2004
View the Complete Patent at the US Patent & Trademark Office
The flame propagation rate resulting from a combustion event in the combustion chamber of an internal combustion engine is controlled by modulation of the heat transfer from the combustion flame to the combustion chamber walls. In one embodiment, heat transfer from the combustion flame to the combustion chamber walls is mechanically modulated by a movable member that is inserted into, or withdrawn from, the combustion chamber thereby changing the shape of the combustion chamber and the combustion chamber wall surface area. In another embodiment, heat transfer from the combustion flame to the combustion chamber walls is modulated by cooling the surface of a portion of the combustion chamber wall that is in close proximity to the area of the combustion chamber where flame speed control is desired.
Roberts, Jr.; Charles E. (San Antonio, TX), Chadwell; Christopher J. (San Antonio, TX)
Southwest Research Institute (San Antonio, TX)
10/ 272,261
20040074455
October 17, 2002
GOVERNMENT LICENSE RIGHTS The U.S. Government has a paid up license in this invention in the right in certain circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Contract No. DE-AT26-98FT40398, awarded by the U.S. Department of Energy.