US Patent 9315187 Plug-in hybrid electric vehicle system

A plug-in hybrid electric vehicle system employs an improved integrated propulsion device, a drive system and battery management system that is operable to be used in the commercial vehicle business. The vehicle system is operable to provide optimal performance for particular fleet applications by taking into consideration driving patterns and load demands. The vehicle system also provides a drive for auxiliary equipment for work vehicles and driver selectable driving modes for when a vehicle encounters different driving demands.