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Engine control system having pressure-based timing

United States Patent

October 4, 2011
View the Complete Patent at the US Patent & Trademark Office
A control system for an engine having a first cylinder and a second cylinder is disclosed having a first engine valve movable to regulate a fluid flow of the first cylinder and a first actuator associated with the first engine valve. The control system also has a second engine valve movable to regulate a fluid flow of the second cylinder and a sensor configured to generate a signal indicative of a pressure within the first cylinder. The control system also has a controller that is in communication with the first actuator and the sensor. The controller is configured to compare the pressure within the first cylinder with a desired pressure and selectively regulate the first actuator to adjust a timing of the first engine valve independently of the timing of the second engine valve based on the comparison.
Willi; Martin L. (Dunlap, IL), Fiveland; Scott B. (Metamora, IL), Montgomery; David T. (Edelstein, IL), Gong; Weidong (Dunlap, IL)
Caterpillar Inc. (Peoria, IL)
12/ 292,832
November 26, 2008
STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under Contract No. DE-FC02-01CH11079, awarded by the Department of Energy. The Government may have certain rights in this invention.