Parking brake module for a pressure-medium-operated brake system of a vehicle suitable for coupling a trailer, brake system and vehicle with the parking brake module and method therefor

摘要

The invention relates to a parking brake module 42, 42 ', 42' 'for a pressure-medium-operated brake system 18 of a suitable for coupling a trailer 16 vehicle 14 with a parking brake function, the brake system 18 and the vehicle 14 so and an associated method 110. The parking brake module 42, 42nd ', 42' 'has a trailer control valve port 56 for connection to a trailer control valve 46 for controlling a trailer brake 20 of the trailer 16. Next, the parking brake module 42, 42 ', 42' 'on a control valve 74, 74' with a first Ansteuerventileingang 80, by in the event of a voltage drop on Feststellbremsmdul 42, 42 ', 42' 'in a first state of the parking brake module 42, 42 ', 42' 'for pressure reduction and in an alternatively einnehmbaren second state of the parking brake module 42, 42', 42 '' pressure increase at the trailer control valve port 56 pressure medium is feasible. The control valve 74, 74 'has a first switching position 76 for shutting off the trailer control valve port 56 against the first Ansteuerventileingang 80 and a second switching position 78 for connecting the trailer control valve port 56 through the control valve 74, 74' with the first Ansteuerventileingang 80. According to the invention, the control valve 74, 74 'is a bistable valve, in particular bistable solenoid valve, with a bistable switching function. As a result, the vehicle 14 with the parking brake module 42, 42 ', 42' 'either with actuated or dissolved trailer brake 20 of the trailer 16 safely parked.