Electronically pressure-controllable braking system and methods for controlling an electronically pressure-controllable braking system

An electronically pressure-controllable braking system for an autonomously driving motor vehicle, comprising:

• a pressure medium unit for setting and controlling wheel-specific brake pressures on wheel brakes, which are respectively associated with one of several brake circuits of the braking system and are connected to the pressure medium unit, the pressure medium unit being equipped per brake circuit with one electronically controllable pump unit, and per connected wheel brake, with one electronically controllable valve device which controls a pressure medium flow to the wheel brake;
• wherein each wheel brake of the braking system is connected in each case to at least one second brake circuit, which is equipped with an electronically controllable second pump unit and is equipped per connected wheel brake with one electronically controllable second valve device, the pump unit and the valve device of the one brake circuit being operable in each case independently of the pump unit and the valve device of the respective other brake circuit;
• wherein the valve device associated with one wheel brake is respectively composed of one intake valve controlling a pressure medium flow to the wheel brake and one discharge valve controlling a pressure medium discharge from the wheel brake, the discharge valves being changeable as a function of an electronic control from a blocking position in an unlimited number of intermediate positions into a pass-through position;
• and
• wherein downstream from the intake valves, respectively one springless non-return valve, is provided, which is pervious in a direction of flow from the valve device to wheel brake and blocks in an opposite direction of flow.