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Cylinder to cylinder balancing using intake valve actuation

United States Patent

January 18, 2005
View the Complete Patent at the US Patent & Trademark Office
A method and apparatus for balancing a combustion phasing between a plurality of cylinders located in an engine. The method and apparatus includes a determining a combustion timing in each cylinder, establishing a baseline parameter for a desired combustion timing, and varying actuation of at least one of a plurality of intake valves, each intake valve being in fluid communication with a corresponding cylinder, such that the combustion timing in each cylinder is substantially equal to the desired combustion timing.
Duffy; Kevin P. (East Peoria, IL), Kieser; Andrew J. (Morton, IL), Kilkenny; Jonathan P. (Peoria, IL)
Caterpillar Inc (Peoria, IL)
10/ 742,544
December 19, 2003
This invention was made with Government support under DOE Contract No. DE-FC05-00OR22806; awarded by the U.S. Department of Energy. The Government has certain rights to this invention.