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Electric-drive tractability indicator integrated in hybrid electric vehicle tachometer

United States Patent

September 2, 2014
View the Complete Patent at the US Patent & Trademark Office
An indicator, system and method of indicating electric drive usability in a hybrid electric vehicle. A tachometer is used that includes a display having an all-electric drive portion and a hybrid drive portion. The all-electric drive portion and the hybrid drive portion share a first boundary which indicates a minimum electric drive usability and a beginning of hybrid drive operation of the vehicle. The indicated level of electric drive usability is derived from at least one of a percent battery discharge, a percent maximum torque provided by the electric drive, and a percent electric drive to hybrid drive operating cost for the hybrid electric vehicle.
Tamai; Goro (West Bloomfield, MI), Zhou; Jing (Auburn Hills, MI), Weslati; Feisel (Troy, MI)
Chrysler Group LLC (Auburn Hills, MI)
13/ 593,589
August 24, 2012
GOVERNMENT INTEREST This invention was made, at least in part, under U.S. Government, Department of Energy, Contract Nos. DE-EE0002720 and DE-EE0004529. The Government may have rights in this invention.