Patent ID: 7119454

Claim:
A vehicle power system for a heavy-duty hybrid vehicle including an engine compartment and a drive shaft, comprising: a main power unit configured to supply a DC power to the heavy-duty hybrid vehicle and located in the engine compartment; an electric propulsion motor to propel the heavy-duty hybrid vehicle using the drive shaft; a DC bus electrically coupled with the main power unit, the DC bus configured to receive the DC power from the main power unit; a vehicle accessory traditionally powered directly from an internal combustion engine of a conventional heavy-duty vehicle and requiring more than 1 kilowatt of power, the vehicle accessory including at least one of a compressor and a pump; an electric accessory motor, which is separate from the electric propulsion motor, electrically coupled with the DC bus and mechanically coupled with the vehicle accessory, the electric accessory motor configured to supply power to the vehicle accessory, and the electric accessory motor and vehicle accessory carried by the heavy-duty vehicle outside of the engine compartment.