Electronically pressure-controllable braking system and methods for controlling an electronically pressure-controllable braking system
AssigneeRobert Bosch GmbH
InventorsFanny Palomba, Horst Beling, Thomas Friedrich, Vaclav Kocourek
Life of this patent
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Abstract
An electronically pressure-controllable braking system and methods for controlling an electronically pressure-controllable braking system. Each wheel brake of the braking system is connected respectively to at least two brake circuits, pump units and valve devices of one brake circuit are operable respectively independently of the pump units and the valve devices of the respective other brake circuit. This provides a cost-effectively and compactly designed redundant braking system, which is suitable for use in autonomously, i.e., driverlessly drivable, motor vehicles.
Claims14
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.
A method for controlling an electronically pressure-controllable braking system, in which each connected wheel brake is connected to at least two mutually separated brake circuits, which are respectively equipped with a pump unit and with a valve device for controlling brake pressure in the wheel brake, the pump units and the valve devices being respectively operable independently and separately from one another, the method comprising:
- controlling the brake pressure in successive braking actions alternately by an operation of the pump unit and the valve device of one of the brake circuits, and by operating the pump unit and the valve device of a respective other one of the brake circuits.
A method for controlling an electronically pressure-controllable braking system, in which each connected wheel brake is connected to at least two mutually separated brake circuits, which are respectively equipped with a pump unit and with a valve device for controlling brake pressure in the wheel brake, the pump units and the valve devices being respectively operable independently and separately from one another, the method comprising:
- controlling the brake pressure in successive braking actions by an operation of the pump unit and of the valve device of one of the brake circuits;
- and
- operating the pump unit and the valve device of a respective other one of the brake circuits when a malfunction of the one of the brake circuits is determined.
A method for controlling an electronically pressure-controllable braking system, in which each connected wheel brake is connected to at least two mutually separated brake circuits, which are respectively equipped with a pump unit and with a valve device for controlling brake pressure in the wheel brake, the pump units and the valve devices being respectively operable independently and separately from one another, the method comprising:
- operating the pump units of the brake circuits simultaneously and operating the valve devices of the brake circuits in such a way that pressure medium-conducting connections are established between respectively one of the wheel brakes and respectively exactly one pump of the pump units.
Dependencies are inferred from the claim text.