Brake module for a hydraulically braked tractor vehicle which can be coupled to a pneumatically braked trailer vehicle

A brake module for a hydraulically braked tractor vehicle which is coupled to a pneumatically braked trailer vehicle, wherein the tractor vehicle has a hydraulically activated service brake which has at least one master brake cylinder, which is activated by a brake activation element, for generating a hydraulic pressure in at least one wheel brake cylinder of at least one wheel of the tractor vehicle, and wherein the brake module has a trailer control valve which is connected via a hydraulic control inlet to a hydraulic pressure line which leaves the master brake cylinder, and via a pneumatic inlet to the compressed air reservoir, wherein the hydraulic control pressure determines the level of the pneumatic output pressure at a pneumatic outlet of the trailer control valve,

• wherein the brake module has a break-off prevention module which, in the case of leakage or tearing off of the control line from the trailer control valve with respect to the brake system of the trailer vehicle, shuts off a supply line to a supply pressure coupling head and brings about venting of the brake system of the trailer vehicle,
• wherein the break-off prevention module is provided with a pneumatic supply pressure inlet and with a pneumatic tear-off control pressure inlet, wherein the tear-off control pressure inlet is connected to a compressed air reservoir of the tractor vehicle independently of pneumatic pressure inlets of the trailer control valve, wherein supply pressure which is present at the supply pressure inlet passes through the break-off prevention module and fed to a pneumatic supply pressure inlet of the trailer control valve,
• wherein a normally closed 3/2-way valve is arranged between the compressed air reservoir and the tear-off control pressure inlet of the break-off prevention module, which 3/2-way valve is switched into an open position when the service brake is activated, and which 3/2-way valve releases compressed air to the tear-off control pressure inlet of the break-off prevention module,
• wherein the trailer control valve has a pneumatic pilot-control pressure inlet, into which compressed air for performing pilot-control of the brake system of the trailer vehicle is fed, and
• wherein a pressure-limiting valve is arranged in a supply line between the normally closed 3/2-way solenoid valve and the pilot-control pressure inlet of the trailer control valve.