PARKING BRAKE MODULE, BRAKE SYSTEM AND VEHICLE USING SAME AND METHOD FOR OPERATING A PARKING BRAKE HAVING SUCH A MODULE

The invention relates to a parking brake module (2) of a parking brake device with an emergency braking function, by means of which pressure medium supply to at least one brake actuator (40) can be controlled. To this end, the parking brake module (2) has an electronic control device (20), at least one solenoid valve (14) that can be actuated by the electronic control device, a pressure medium quantity amplifying valve (16) for pressure medium supply to the at least one brake actuator (40), and at least one pressure medium inlet (4), via which pressure medium can be supplied to the parking brake module (2). To provide the emergency braking function, the parking brake module (2) further has a dual check valve (48) and a pressure medium connection (46), wherein the dual check valve (48) has two inlets (50, 52) and one outlet (54). The dual check valve (48) is designed such that that inlet (50, 52) at which the lower pressure is present is connected to the outlet (54) of the dual check valve (48), and the outlet (54) of the dual check valve (48) is connected to the control inlet (44) of the pressure medium quantity amplifying valve (16).