e g disengagement of the clutch with standard transmissions corresponding signals in the case of an automatic transmission or actuation of the gas pedal taking a minimum engine rpm into account and using it this is followed first by triggering of the abs control valves 15a 15b here embodied as 3 3 way valves into the third position in which the brake pressure that has been fed in and so far maintained is relieved by flowing into the end chamber of tank 17 the process then continues as follows if the vehicle is set into motion without excessive loss of traction as detected by the already existing abs wheel sensors then when a certain speed is attained which may be on the order of 40 km h 25 mph the asr magnet valve 24 is de excited and by briefly triggering the recirculating pump motor the volume of pressure fluid relieved into the end chamber of tank 17 is returned to the master brake cylinder on the other hand if on starting to move an an excessive loss of traction spinning is detected at a wheel then with the abs control valves now back in the first position that assures normal communication between the master brake cylinder and the wheel brake cylinders although the communication with the master brake cylinder is still interrupted by the position of the asr valve brake pressure is generated by immediately triggering the recirculating pump as noted this pressure is blocked off toward the master brake cylinder 10 by the excited asr magnet valve 24 and is now modulated as required in the wheel brake cylinder of the spinning wheel by the abs control valves 15a or 15b suitably triggered for attaining traction control functions it is recommended that the.