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Eccentric crank variable compression ratio mechanism

United States Patent

May 13, 2008
View the Complete Patent at the US Patent & Trademark Office
A variable compression ratio mechanism for an internal combustion engine that has an engine block and a crankshaft is disclosed. The variable compression ratio mechanism has a plurality of eccentric disks configured to support the crankshaft. Each of the plurality of eccentric disks has at least one cylindrical portion annularly surrounded by the engine block. The variable compression ratio mechanism also has at least one actuator configured to rotate the plurality of eccentric disks.
Lawrence; Keith Edward (Kobe, JP), Moser; William Elliott (Peoria, IL), Roozenboom; Stephan Donald (Washington, IL), Knox; Kevin Jay (Peoria, IL)
Caterpillar Inc. (Peoria, IL)
10/ 998,895
November 30, 2004
U.S. GOVERNMENT RIGHTS This invention was made with government support under the terms of Contract No. DE-FC05-00OR-22806 awarded by the Department of Energy. The government may have certain rights in this invention.