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.

A brake system and method for a motor vehicle with at least four hydraulically actuatable wheel brakes, includes a first electrically controllable pressure source separably connects a first brake circuit supply line via a first isolating valve, a second electrically controllable pressure source separably connects a second brake circuit supply line via a second isolating valve, at least four electrically actuatable inlet valves, each assigned to one of the wheel brakes, the first and second brake circuit supply lines are each connected to two inlet valves, an electrically actuatable outlet valve per brake, an electrically actuatable circuit separation device, by which the first and the second brake circuit supply line are hydraulically separated and connected. First and second electronic devices actuate the first and second pressure sources, respectively. The first isolating valve actuates the second electronic device and the second isolating valve actuates the first electronic device.

A sensor arrangement for a braking system of a vehicle is disclosed comprising a connection interface, a control unit, and a sensor. The sensor has an external interface with electrical contacts via which the sensor is connected to the control unit. The control unit is connected to and supplied with power via the connection interface and exchanges data with a higher-level unit via the connection interface. The sensor is provided power via the electrical contact points and provides electrical output signals via the electrical contact points. A first contact point provides a first electrical output signal and is connected to the connection interface via a first switching element such that the first contact point is connected to the connection interface when the first switching element is in the deenergized state and is disconnected from the connection interface when the first switching element is in the energized state.

A work machine with a mechanical brake touch-up system includes a power source that provides power to a rotational element. The work machine includes a brake that is configured with a piston to selectively engage a frictional element rotationally coupled to the rotational element, a position sensor for generating a position signal of the piston, and a control valve configured to supply hydraulic pressure to the piston to selectively apply a retarding torque to the frictional element, a speed sensor for generating a rotational speed signal. The work machine includes a touch-up controller which is configured to detect a retarding condition of the work machine based on the speed signal, and, upon detection of a retarding condition, control the position of the piston to a touch-up position between an engaged and retracted position.

The disclosure relates to a main brake cylinder arrangement for a motor vehicle brake system, comprising: at least one piston, which can be displaced along a displacement axis (V) and, together with a housing arrangement, delimits a pressure chamber; a force input member, which is displaceable according to a brake pedal actuation and is coupled or can be coupled to the piston for common displacement; an elongated position encoder element, which is displaceable according to an actuation of the force input member; a detection unit, which is designed to detect a displacement of the position encoder element; and a receiving region, which is designed to receive the position encoder element at least in part. The ends of the position encoder element are each arranged in a different housing region (F, S), which is arranged in a fluid path between the first and second housing region (F, S).

An electrohydraulic brake actuator for a motor vehicle. The brake actuator has a piston-cylinder unit, whose piston is displaceable by an electric motor via a screw drive. Two pistons are provided, of which initially only a piston having a greater pressure-generating piston surface is displaced in order to build up pressure quickly and subsequently a second piston having a smaller pressure-generating piston surface is displaced in order to increase pressure.

An emergency braking device including an actuator (2), a pressurizing circuit (3) supplying the actuator (2) via a control pressure and a discharge circuit (4). The discharge circuit (4) includes restrictors (13, 14) for controlling the pressure and/or flow rate of the supply fluid of the actuator (2) during a discharge of the actuator. The restrictors (13, 14) are configured to define an intermediate pressure between a low pressure level and the control pressure of the actuator (2).

The invention relates to a braking device for a work machine comprising a pressure supply, a brake circuit, at least one brake actuable via the brake circuit, a manually controllable brake valve by means of which the brake circuit is actuable, a control unit, and at least one control valve that is controllable by the control unit and by means of which the brake circuit is actuable. In accordance with the invention, the total brake torque exerted by the at least one brake is adjustable by means of a corresponding control or regulation of the at least one control valve in dependence on at least two input signals detectable by the control unit, with a first input signal relating to a current state of the manual actuation of the brake valve and a second input signal relating to a current driving state of the work machine

The disclosure relates to controlling braking behaviors a vehicle in an autonomous driving mode in the event of a hydraulic system failure. For instance, the vehicle may be controlled in the autonomous driving mode according to a first braking control behavior based on a first relationship between position of a brake pedal of the vehicle and amount of deceleration for the vehicle. While controlling the vehicle, a failure of a hydraulic system may be determined. Based on the determination, the vehicle may be controlled in the autonomous driving mode according to a second braking control behavior by moving the brake pedal until the vehicle reaches a deceleration target defined by the second braking control behavior.

A method (purge procedure) for purging a decoupled brake system including: a brake fluid reservoir, a master cylinder, a brake circuit connected to the wheel brakes, a pump equipped with a plunger. A segment of the brake circuit to be purged is isolated by closing the solenoid valves at the extremities of the segment, a vacuum is created with the plunger, and an extremity of this segment is placed in communication with the exterior to evacuate the trapped air bubble.