초록 ▼

In an antilock brake device, a determining function of which the sign varies when a wheel slip ratio is identical to a target value, and a switching function comprising an integral term which is a time integral of the determining function, are set, and a brake torque target value is determined so th

In an antilock brake device, a determining function of which the sign varies when a wheel slip ratio is identical to a target value, and a switching function comprising an integral term which is a time integral of the determining function, are set, and a brake torque target value is determined so that it is proportional to the switching function. Alternatively, the brake torque target value computed according to the determining function is corrected according to a wheel angular acceleration. In this way, a brake torque or the wheel slip ratio between a road surface and tires is precisely controlled.

대표청구항 ▼

[ The embodiments of this invention in which an exclusive property or privilege is claimed are defined as follows:] [4.] An antilock brake device comprising:a first sensor for detecting a wheel speed,a second sensor for detecting a vehicle speed,a third sensor for detecting a wheel angular accelerat

[ The embodiments of this invention in which an exclusive property or privilege is claimed are defined as follows:] [4.] An antilock brake device comprising:a first sensor for detecting a wheel speed,a second sensor for detecting a vehicle speed,a third sensor for detecting a wheel angular acceleration, a controller configured to:calculate a wheel slip ratio from said wheel speed and said vehicle speed,set a switching function which takes a positive value when said wheel slip ratio is less than said target value, and which takes a negative value when said wheel slip ratio is larger than said target value,compute a brake torque target value according to the value of said switching function, andcorrect said brake torque target value by a correction value according to said angular acceleration, and said brake devise further comprising:a brake torque generating mechanism for generating a brake torque corresponding to said brake torque target value.