Brake system with adaptively controllable brake lining clearance

A hydraulically acting brake system having a master brake cylinder, the at least one working chamber of which is connected via at least one hydraulic line to at least one wheel brake of the vehicle, characterised in that a negative pressure may be generated by adjusting the piston of the master brake cylinder, whereby in the at least one hydraulic line, the brake piston of at least one wheel brake is adjusted in order to generate a brake clearance, wherein by means of a sensor the negative pressure in the brake line or in the master brake cylinder may be determined, and a controller adjusts on the basis of the value of the determined pressure a defined stroke of the pistons and thus a defined brake clearance.

A method for operating a hydraulically acting brake system having a master brake cylinder, the at least one working chamber of which is connected via at least one hydraulic line to at least one wheel brake of the vehicle, wherein by means of negative pressure in the at least one hydraulic line, the brake piston of at least one wheel brake may be adjusted in order to generate a brake clearance, or by means of a brake system as claimed in any one of the preceding claims, wherein part of the volume in the master brake cylinder is displaced into one or several re-feeding chambers by means of the master brake cylinder with the re-feeding valve open, wherein subsequently, with the re-feeding valve closed and the control valve open, the brake pistons in the wheel brakes are lifted off by retracting the piston of the master brake cylinder from the brake discs in order to achieve a lining clearance.