Patent ID: 6244674
Filing Date: 2001-06-12
Classification: B60L

Abstract:
A brake control system for controlling a braking force applied to a wheel of an electrically operated vehicle, comprising:an electric motor operatively connected to said wheel for rotating said wheel;a battery mounted on said vehicle and electrically connected to said electric motor for driving said electric motor;motor control means for controlling said electric motor to apply a rotating torque to said wheel and apply a regenerative braking torque to said wheel;a wheel brake cylinder operatively mounted on said wheel for applying a hydraulic braking torque to said wheel;pressure generating means for pressurizing brake fluid to generate a hydraulic braking pressure in response to operation of a manually operated braking member;pressure control means for controlling the hydraulic braking pressure generated by said pressure generating means and supplied to said wheel brake cylinder to apply the hydraulic braking torque to said wheel;monitor means for monitoring a rotational speed of said electric motor;regenerative braking torque reducing means for reducing the regenerative braking torque in response to the rotational speed of the electric motor monitored by said monitor means, said pressure control means applying the hydraulic braking torque to said wheel when said regenerative braking torque reducing means starts reducing the regenerative braking torque;pressure difference detection means for detecting a pressure difference between the hydraulic braking pressure of the brake fluid discharged from said pressure generating means and the hydraulic braking pressure in said wheel brake cylinder; andmodifying means for modifying a characteristic of the regenerative braking torque reduced by said regenerative braking torque reducing means, in response to the pressure difference detected by said pressure difference detection means.