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HYBRID VEHICLE CONTROL

United States Patent Application

20130338863
A1
View the Complete Application at the US Patent & Trademark Office
A method and powertrain apparatus for controlling a hybrid electric vehicle powertrain to maintain a catalyst within a catalytic converter at an efficient operating temperature while also maximizing the use of electric vehicle operating mode. The method and apparatus determine, during an electric vehicle operating mode, whether a catalyst efficiency is below a predetermined threshold and, if it is determined that the catalyst efficiency is below the predetermined threshold, suspend the electric vehicle operating mode and turn on the vehicle's engine to bring the catalyst efficiency to or above the predetermined threshold.
Shallvari, Iva (Troy, MI), Velnati, Sashidhar (Oxford, MI), DeGroot, Kenneth P. (Macomb Township, MI)
CHRYSLER GROUP LLC (Auburn Hills MI)
13/ 523,943
June 15, 2012
GOVERNMENT INTEREST [0001] This invention was made, at least in part, under U.S. Government, Department of Energy, Contract No. DE-EE0002720. The Government may have rights in this invention.