Method for Controlling a Pneumatic Brake System and a Pneumatic Brake System for a Vehicle

A pneumatic brake system for a vehicle, wherein the brake system comprises:

• an electronic brake control device for receiving a driver's braking request signal and for carrying out an automatic brake control method by outputting brake signals and pilot-control brake signals,
• a pilot-control line, brake lines and pneumatic wheel brakes which are connected to the brake lines,
• at least one check valve which is connected directly or indirectly to the pilot-control line, receives a fed-through pilot-control pressure and sets a brake pressure in the connected brake line,
• a pilot-control valve for outputting a pilot-control pressure to the pilot-control line as a function of the pilot-control brake signals,
• wherein, in order to automatically modulate a median pilot-control pressure level in the pilot-control line, the electronic brake control device alternately outputs pilot-control brake signals to the pilot-control valve in such a way that said pilot-control pressure level modulates the pilot-control valve from a bled state in alternating venting phases and bleeding phases, and in the process increases the pilot-control pressure in the venting phases and decreases it in the bleeding phases.