ELECTROPNEUMATIC PARKING BRAKE MODULATOR FOR CONTROLLING A PARKING BRAKE MODE.OF BRAKES OF A TRAILER IN A VEHICLE/TRAILER COMBINATION.

摘要

The invention relates to an electropneumatic parking brake modulator for controlling a parking brake mode of brakes of at least one trailer in a vehicle/trailer combination that consists of a towing vehicle and the trailer. The parking brake, modulator (1) comprises a valve element (12) for airing and bleeding the spring brake cylinders of the brakes of the trailer. The parking brake modulator (1) further comprises at least one compressed air reservoir inlet (7, 8) for airing at least one compressed air line (10) in the parking brake modulator (1) with compressed air from a compressed air reservoir (3, 4) of the towing vehicle and at least one compressed air reservoir outlet (14) at which a reservoir pressure can be made available for the brakes of the trailer. The parking brake modulator (1) finally comprises at least one compressed air control outlet (17) at which a control pressure can be made available for the brakes of the trailer. In order to increase the cost-effectiveness of such a device, a towing vehicle protection valve (2) is integrated into the parking brake modulator (1), a compressed air line (16) to the at least one compressed air control outlet (17) being automatically blockable in the case of a pressure drop of the reservoir pressure made available for the trailer below a predetermined threshold value.