Patent ID: 6155365
Filing Date: 2000-12-05
Classification: B60K,B60L,B60T,B60W,Y02T,Y10S

Abstract:
A hybrid electric powertrain system for a vehicle, comprising:a transmission for driving a pair of wheels of said vehicle;a heat engine coupled to said transmission;an electric motor/generator coupled to said transmission;a friction brake system for applying brake torque to said vehicle; anda controller unit for generating control signals to said electric motor/generator and said friction brake system for controllably braking said vehicle in response to a driver's brake command, wherein said controller unit determines an amount of regenerative torque available, by multiplying the torque available at the transmission input shaft by a drivetrain gear ratio, and compares this value to a determined amount of brake torque requested for determining said control signals to said electric motor/generator and said friction brake system.