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Homogenous charge compression ignition engine having a cylinder including a high compression space

United States Patent

December 30, 2003
View the Complete Patent at the US Patent & Trademark Office
The present invention relates generally to the field of homogeneous charge compression engines. In these engines, fuel is injected upstream or directly into the cylinder when the power piston is relatively close to its bottom dead center position. The fuel mixes with air in the cylinder as the power piston advances to create a relatively lean homogeneous mixture that preferably ignites when the power piston is relatively close to the top dead center position. However, if the ignition event occurs either earlier or later than desired, lowered performance, engine misfire, or even engine damage, can result. Thus, the present invention divides the homogeneous charge between a controlled volume higher compression space and a lower compression space to better control the start of ignition.
Agama; Jorge R. (Peoria, IL), Fiveland; Scott B. (Peoria, IL), Maloney; Ronald P. (Peoria, IL), Faletti; James J. (Spring Valley, IL), Clarke; John M. (Chillicothe, IL)
Caterpillar Inc (Peoria, IL)
10/ 029,417
December 20, 2001
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 DE-FC05-97OR22605, awarded by the Department of Energy. In other words, this invention was made with Government support under DE-FC05-97OR22605 awarded by the Department of Energy. The Government has certain rights in this invention.