Patent ID: 6012782
Filing Date: 2000-01-11
Classification: B60T

Abstract:
An apparatus for controlling a left-wheel and a right-wheel braking torque applied to a left and a right wheel of a motor vehicle running on a road surface, respectively, when the vehicle is braked, comprising:a torque changing device which changes each of said left-wheel and right-wheel braking torques; anda controller which controls, in an anti-lock control mode thereof, said torque changing device to prevent each of said left and right wheels from being locked on the road surface,said controller comprising torque-difference control means for controlling said torque changing device to change at least one of said left-wheel and right-wheel braking torques such that a difference between the left-wheel and right-wheel braking torques is smaller when a deceleration of the vehicle is higher than a threshold value than when said deceleration is not higher than said threshold valuewherein said controller further comprises:normal control means for controlling said torque changing device to change said at least one of said left-wheel and right-wheel braking torques, so that said each of said left and right wheels is prevented from being locked on the road surface; andspecial control means for controlling said torque changing device to change said at least one of said left-wheel and right-wheel braking torques such that the difference between the left-wheel and right-wheel braking torques when said special control means controls the torque changing device is smaller than the difference between the left-wheel and right-wheel braking torques when said normal control means controls the torque changing device, so that said each of said left and right wheels is prevented from being locked on the road surface,and wherein said torque-difference control means comprises selecting means for, when said deceleration of the vehicle is higher than said threshold value, selecting said special control means for controlling said torque changing device, and inhibiting said normal control means from controlling the torque changing device and, when said deceleration is not higher than said threshold value, selecting said normal control means for controlling the torque changing device, and inhibiting said special control means from controlling the torque changing device.