Method for operating an electromechanical vehicle brake system

An electromechanical vehicle brake system, comprising:

• an ESP module;
• at least two brake circuits, each brake circuit comprising high and low pressure switching valves, a low pressure storage device, and two wheel brakes;
• and
• a controller configured to:
• in advance of a possible braking procedure and based on a trigger factor:
• fill the low pressure storage device with an amount of brake fluid at a first pre-pressure while a respective inlet valve of each wheel brake is closed and a respective outlet valve of each wheel brake is opened;
• subsequently actuate an ESP pump of the ESP module to fill the vehicle brake system, including the low pressure storage device, with an adjustable amount of final pre-pressure;
• close at least the respective inlet valve and the respective outlet valve of each wheel brake when the final pre-pressure is achieved;
• and
• during a braking procedure, open at least the respective inlet valves and supply at least a part of the final pre-pressure to the wheel brakes of the vehicle brake system.

A method of operating a vehicle brake system, comprising:

• based on a trigger factor:
• filling a low pressure storage device with brake fluid at a pre-pressure while a respective inlet valve of a wheel brake of the vehicle brake system is closed and a respective outlet valve the wheel brake is opened;
• and
• during a braking procedure, opening the inlet valve and supplying at least a part of the pre-pressure to the wheel brake.