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Variable compression ratio device for internal combustion engine

United States Patent

March 23, 2004
View the Complete Patent at the US Patent & Trademark Office
An internal combustion engine, particularly suitable for use in a work machine, is provided with a combustion cylinder, a cylinder head at an end of the combustion cylinder and a primary piston reciprocally disposed within the combustion cylinder. The cylinder head includes a secondary cylinder and a secondary piston reciprocally disposed within the secondary cylinder. An actuator is coupled with the secondary piston for controlling the position of the secondary piston dependent upon the position of the primary piston. A communication port establishes fluid flow communication between the combustion cylinder and the secondary cylinder.
Maloney; Ronald P. (Peoria, IL), Faletti; James J. (Spring Valley, IL)
Caterpillar Inc (Peoria, IL)
10/ 122,560
April 15, 2002
The Government of the United States of America has rights in this invention pursuant to Contract No. DE-FC05-970R22605 (LTCD) awarded by the U.S. Department of Energy.