Method for controlling a hydraulic brake system

A method for controlling a hydraulic brake system, said hydraulic brake system including a hydraulic pump which is driven by an electric motor and generates a fluid volume flow for the hydraulic brake system, a hydraulic connection that conducts the fluid volume flow between the hydraulic pump and a wheel brake, and a reservoir that stores a fluid volume, the reservoir being connected to the hydraulic connection by a switching valve, the method comprising:

• actuating the switching valve in such a way that a fluid pulsation in the hydraulic connection is counteracted;
• and
• at least one of the following steps:
• defining the fluid volume flow of the hydraulic pump;
• determining a pressure difference between the hydraulic pump and the wheel brake that is required to smooth the fluid pulsation;
• determining a control flow resulting from a degree of opening of the switching valve that results in the pressure difference due to an attenuation of a volume flow gradient;
• actuating the switching valve based on the control flow to set the degree of opening of the switching valve;
• determining a volume flow loss, and an increase in rotational speed of the hydraulic pump that compensates for the volume flow loss;
• and
• actuating the hydraulic pump in order to set the increase in rotational speed to compensate for the volume flow loss.