Patent ID: 8512208

Claim:
A braking system for a utility vehicle which is coupleable pneumatically to a trailer, comprising: at least one electronic control unit, a valve device which is switchable electrically by the at least one electronic control unit, wherein in a switched state of the valve device pressure is capable of being built up for the trailer braking system, which pressure brings about braking of the trailer, and a pressure sensor which senses the pressure for the trailer braking system and transmits a corresponding signal to the electronic control unit, wherein the pressure for the trailer braking system can be influenced by the electronic control unit by pulsed switching of the valve device taking into account the pressure, sensed by the pressure sensor, for the trailer braking system, wherein the electronic control unit permits the pulsed switching in order to brake the trailer in the case of an inactive service brake of the traction vehicle based on at least one driving state of the utility vehicle.