Patent ID: 6099089
Filing Date: 2000-08-08
Classification: B60L,B60T

Abstract:
A regenerative and friction braking apparatus for a vehicle having one or more wheels driven by a drive motor, comprising:a master cylinder for generating a hydraulic signal in response to a driver brake command;a pressure sensor for generating a pressure signal representative of said hydraulic signal;a throttle sensor for generating an acceleration signal in response to a driver acceleration command;an undriven wheel having a first brake actuator;a driven wheel connected to the drive motor and having a third brake actuator;a hydraulic control unit in fluid communication with said master cylinder and said first and third brake actuators, respectively;a power storage device in communication with the drive motor;brake control means for commanding said hydraulic control unit in response to said pressure signal; anddrive motor control means for determining a coast down regenerative torque signal and a driver brake command regenerative torque signal, said driver brake command regenerative torque signal including a drive motor inertia component, said drive motor control means further commanding the drive motor to regeneratively brake said driven wheel in response thereto, thereby providing a desirable proportioning of front to rear braking.