Method for calibrating analog-controlled hydraulic valves and brake system comprising an electronic control and regulating unit in which the method is carried out

A method for determining a control characteristic of an analogized or analog-controlled hydraulic valve of a brake system for motor vehicles, having hydraulically actuable wheel brakes, in which a brake pressure (pDBE), which is produced with the aid of an electrically controllable, electric-motor-driven pressure supply device, passes via an inlet valve to a wheel brake and can be passed out of the wheel brake into a pressure medium reservoir, via an outlet valve, wherein the pressure supply device and the inlet valves, and the outlet valves, can be controlled by an electronic control and regulating unit, wherein the control characteristic describes at least one relationship of dependence between an electric valve control variable and a differential pressure (Δp) or pressure (p) present at the valve, wherein to determine the control characteristic of an analogized or analog-controlled inlet or outlet valve, a brake pressure is produced by the control and regulating unit by the pressure supply device, and the brake pressure (pDBE) is determined by a pressure sensor associated with the pressure supply device, and the brake pressure (pDBE) determined and an associated valve control variable are stored as a calibration point of the control characteristic in the control and regulating unit.