Control system for vehicle braking acting on both driven wheels

摘要

The hydraulic control unit (61) incorporates pressure adaptation circuits (13,14) for wheelslip correction or antilock braking, a master cylinder (1) and individual wheel brake cylinders (2RL,2RR,2FL,2FR). The wheelslip correction portion (13) includes a blocking valve (21), pressure switch (22) and hydraulic pump (24). The antilock braking portion features electromagnetic pressure-boosting valves (41) and reducing valves (46), reservoirs (44) and pumps (49). Road speed and coefficient of friction are calculated from the monitored road wheel speeds, and control is applied to the driven wheel (nearside or offside) at which the coefficient is smaller.