METHOD AND DEVICE FOR CONTROLLING AN ELECTROHYDRAULIC BRAKING SYSTEM FOR MOTOR VEHICLES

摘要

The invention relates to a method for controlling an electrohydraulic braking system for motor vehicles, comprising at least one brake pressure control or brake pressure regulation function, in particular an anti-lock regulation function and one other brake pressure control or brake pressure regulation function, which can preferably be controlled in a "brake-by-wire" operating mode. Said system comprises a pressure supply device (50) that can be regulated by an electronic control and regulation unit which is connected or can be connected to hydraulically operated wheel brakes (9) and by means of which the wheel brakes (9) can be hydraulically operated using at least one pressure control valve (6). The pressure supply device comprises a cylinder-piston assembly with a hydraulic pressure chamber (4), the piston (3) of said assembly being displaced by an electromechanic actuator (1, 2). A target pressure value (PRequest_i) is determined for each wheel brake (9) and the cylinder-piston assembly (3, 4) is regulated in such a way that a pre-determined pre-pressure (PPre_Pressure) is set in the hydraulic chamber (4) by the displacement (s, 14) of the piston (3), said pressure being determined from the target pressure values (PRequest_i). The invention also relates to a device for regulating the pre-determined pre-pressure (PPre_Pressure).