Patent ID: 8014927

Claim:
An antilock brake system control device that regulates an antilock brake system of a vehicle that has a retarder to control constant speed running while avoiding wheels of the vehicle to be locked upon braking of the vehicle, the control device comprising: a rotation speed detector that detects a rotation speed of each of the wheels; a brake controller that controls the braking of each of the wheels based on the rotation speed of each of the wheels which is detected by the rotation speed detector; a retarder control judging unit that judges whether constant speed running control is conducted by the retarder or not; a set speed monitor that monitors a set speed determined by the retarder when the retarder control judging unit judges that the constant speed running control is conducted by the retarder; an actual speed monitor that monitors an actual speed of the vehicle which is calculated based on the rotation speed of each of the wheels detected by the rotation speed detector; a constant speed keeping judging unit that judges whether a running speed is being kept constant at the set speed determined by the retarder or not using the set speed monitor and the actual speed monitor, and an ABS control regulator that regulates brake control by the brake controller when it is judged that the running speed is not being kept constant at the set speed.