Operational method for controlling the brake pressure generator of the main system

A hydraulically closed brake system for a vehicle, the brake system comprising:

• a main system;
• a secondary system, which is hydraulically connected to the main system;
• a first brake pressure generator configured to generate brake pressure, the first brake pressure generator being situated in the main system;
• a second brake pressure generator configured to generate brake pressure, the second brake pressure generator being situated in the secondary system;
• a hydraulic unit situated in the secondary system and by which the brake pressure at a respective wheel is switchable via valves;
• a secondary control unit, by which the hydraulic unit is controllable based on wheel speeds, so that a pressure modulation is realizable;
• and
• a brake pressure generator control unit, situated in the main system and configured to:
• simulate a control strategy of the secondary control unit based on the wheel speeds, and via which the first brake pressure generator is able to be activated,
• predict a pressure resulting from the control strategy of the secondary control unit and the brake pressure at the first brake pressure generator;
• and
• control the first brake pressure generator in accordance with the predicted resulting pressure when the predicted resulting pressure exceeds a limit value, so that the pressure resulting at the brake pressure generator is smaller than the predicted pressure, as a result of an activation of the first brake pressure generator.

A vehicle, comprising:

• a hydraulically closed brake system including:
• a main system,
• a secondary system, which is hydraulically connected to the main system,
• a first brake pressure generator configured to generate brake pressure, the first brake pressure generator being situated in the main system,
• a second brake pressure generator configured to generate brake pressure, the second brake pressure generator being situated in the secondary system,
• a hydraulic unit situated in the secondary system and by which the brake pressure at a respective wheel is switchable via valves,
• a secondary control unit, by which the hydraulic unit is controllable based on wheel speeds, so that a pressure modulation is realizable, and
• a brake pressure generator control unit, situated in the main system and configured to:
• simulate a control strategy of the secondary control unit based on the wheel speeds, and via which the first brake pressure generator is able to be activated,
• predict a pressure resulting from the control strategy of the secondary control unit and the brake pressure at the first brake pressure generator;
• and
• control the first brake pressure generator in accordance with the predicted resulting pressure when the predicted resulting pressure exceeds a limit value, so that the pressure resulting at the brake pressure generator is smaller than the predicted pressure, as a result of an activation of the first brake pressure generator.

A non-transitory computer-readable data carrier on which is stored a computer program including program code for use in controlling a first brake pressure generator, which is operated in a main system of a hydraulically closed brake system for a vehicle, the brake system including at least the first brake pressure generator and a brake pressure generator control unit configured to control the first brake pressure generator, and a secondary system, including a second brake pressure generator, a hydraulic unit, and a secondary control unit configured to activate the hydraulic unit and the second brake pressure generator for pressure modulation, the program code, when executed by the brake pressure generator control unit, causing the brake pressure generator control unit to perform:

• simulating a control strategy of the secondary control unit for controlling the hydraulic unit based on detected wheel speeds of the vehicle so that a brake pressure required at a respective wheel is ascertained, wherein the program code further causes the brake pressure control unit to perform:
• predicting a pressure resulting from the control strategy of the secondary control unit and the brake pressure at the first brake pressure generator;
• and
• controlling the first brake pressure generator in accordance with the predicted resulting pressure when the predicted resulting pressure exceeds a limit value, so that the pressure resulting at the brake pressure generator is smaller than the predicted pressure, as a result of an activation of the first brake pressure generator.