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NONLINEAR MODEL-BASED CONTROLLER FOR PREMIXED CHARGE COMPRESSION IGNITION COMBUSTION TIMING IN DIESEL ENGINES

United States Patent Application

20150330326
A1
View the Complete Application at the US Patent & Trademark Office
Advanced combustion modes, such as PCCI, operate near the system stability limits. In PCCI, the combustion event begins without a direct combustion trigger in contrast to traditional spark-ignited gasoline engines and direct-injected diesel engines. The lack of a direct combustion trigger encourages the usage of model-based controls to provide robust control of the combustion phasing. The nonlinear relationships between the control inputs and the combustion system response often limit the effectiveness of traditional, non-model-based controllers. Accurate knowledge of the system states and inputs is helpful for implementation of an effective nonlinear controller. A nonlinear controller is developed and implemented to control the engine combustion timing during diesel PCCI operation by targeting desired values of the in-cylinder oxygen concentration, pressure, and temperature during early fuel injection.
Shaver, Gregory M. (Lafayette, IN), Kocher, Lyle E. (Whiteland, IN), Hall, Carrie (Chicago, IL), Van Alstine, Daniel (Lafayette, IN), Magee, Mark (Columbus, IN)
14/ 651,521
December 12, 2013
GOVERNMENT RIGHTS [0002] This invention was made with government support under DE-EE0003403 awarded by Department of Energy. The government has certain rights in the invention.