A method is for function checking of a pressure-medium operated electronic brake system of a vehicle, having a valve and sensor device, having a brake cylinder for actuating a brake, having an ABS solenoid control valve associated with the brake cylinder. For function checking of the control valve, it is temporarily activated and pressurized via the control unit and via the valve and sensor device such that pressure builds up at the input side of the control valve although a pressure increase in the associated brake cylinder is not expected, or a decrease after an interim increase is expected, and a malfunction of the anti-lock braking system solenoid control valve is identified if, contrary to expectations, a response of the vehicle due to a pressure increase in the brake cylinder, or due to the lack of a decrease after an increase, is established during this function check.

A method for adjusting brake pressures at pneumatically actuated wheel brakes of a vehicle includes, after an external braking demand, continuously ascertaining, by a brake control unit, in a pressure control mode, at least one differential slip value from measuring signals supplied by speed sensors of the wheels, as the difference between the slip of two axles of the vehicle before releasing the control signals; evaluating the differential slip value with consideration for a predefined or adjustable setpoint differential slip value; and depending on the evaluation, bringing the differential slip value closer to the setpoint differential slip value by adapting at least one control signal.

A valve module is provided for enabling a vehicle to control an autonomous event of the vehicle. The valve module comprises a relay valve, a first solenoid valve, and a second solenoid valve. A first control pressure can be delivered through the first solenoid valve and applied to a control port of the relay valve. In one embodiment, a second control pressure can be delivered through the second solenoid valve and combined with the first control pressure. The combined first and second control pressures are applied to the control port of the relay valve.

An electropneumatic pilot unit for controlling a pneumatic consumer is provided herein. The pilot unit comprises at least two electromagnetic pilot valves. Each of the electromagnetic pilot valves comprises a coil for producing a magnetic flux along a valve axis, an armature which can be moved in the axial direction of the valve axis, a valve seat which can be closed and opened by the armature, and a pneumatic inlet port and a pneumatic outlet port. At least two of the pilot valves lie next to each other with parallel valve axes. Each pilot valve has a port which protrudes towards a common underside for connection to a pilot chamber of the consumer controlled by the pilot valves.

Various examples are directed to systems and methods for controlling a vehicle. Power may be provided to a cut-off valve in fluid communication between an automated control (AC) valve and a shuttle valve. The cut-off valve may be configured to open in response to the power, causing fluid communication between the AC valve and the shuttle valve. A vehicle autonomy system may modulate the AC valve to control a level of pressurized air provided from a pressurized air reservoir to a foundation brake via the AC valve and the shuttle valve. In response to an automated disengage signal, the cut-off valve may close to prevent pressurized air from reaching the shuttle valve via the AC valve and permit pressurized air to reach the shuttle valve via a pedal valve.

An electronically controllable pneumatic braking system for a vehicle includes a first control unit for a primary system and a second control unit for a first fallback level, and a monostable fail-safety valve unit which pneumatically connects a main port, which provides a first pressure, and a failure brake port. The fail-safety valve unit is connected to both control units and in a fault situation, power failure and/or diagnostic situation of the control units, provides the failure brake pressure for triggering a failure braking operation. The failure brake port is connected to the primary system and/or to the first fallback level upstream of a functional pneumatic unit of the primary system and/or the first fallback level, in such a way that both front axle service brake actuators and rear axle service brake actuators have a brake pressure applied thereto in order to implement the failure braking operation.

A method for adjusting brake pressures on pneumatically operated wheel brakes of a motor vehicle includes adjusting, in a normal braking mode, the brake pressures depending on a driver brake request; and adjusting, by a control unit in a pressure control mode, the brake pressures at the respective wheel brakes during reception of an external brake request, which is independent of the driver brake request and defined for the control unit as an external target deceleration value, as a function of a resulting target deceleration value of the vehicle deceleration. The control unit determines the resulting target deceleration value by linking the external target deceleration value according to the external brake request and a value corresponding to the driver brake request. A braking power index is determined which quantitatively represents the braking effect of the wheel brakes, and is provided to be taken into account in pressure control mode.

A brake system for a vehicle includes a first brake device for braking a first wheel of the vehicle, a second brake device for braking a second wheel of the vehicle, a first brake pedal which is paired with the first wheel, a second brake pedal which is paired with the second wheel, a brake control valve which is designed to act on the first brake device and/or the second brake device, a first control valve for controlling a brake pressure in the first brake device, and a second control valve for controlling a brake pressure in the second brake device. The brake system further has an electromechanical switching module in order to block or at least reduce a braking effect of the second brake device while the first brake pedal is being actuated, and the switching module is designed to block or at least reduce a braking effect of the first brake device while the second brake pedal is being actuated.

A method for controlling a vehicle deceleration in a vehicle with an ABS brake system. The method includes detecting a target vehicle deceleration specified by a driver; defining a maximum deceleration and a minimum deceleration, each depending on the detected target vehicle deceleration; detecting an actual vehicle deceleration; and controlling a braking pressure on wheel brakes of a first vehicle axle and a second vehicle axle depending on the detected actual vehicle deceleration by actuation of ABS brake valves. Controlling the braking pressure by the actuation of the ABS brake valves comprises controlling the braking pressure on the wheel brakes of the second vehicle axle depending on a detected actual differential slip if the actual vehicle deceleration is less than the maximum deceleration and greater than the minimum deceleration, wherein the actual differential slip indicates the difference in a rotational behavior of the first vehicle axle.

A driver brake valve for a compressed air brake system of a commercial vehicle is configured to be controlled by a brake pedal and is further configured to output an analog driver braking pressure and an electrical sensor desired signal in dependence upon the actuation of the brake pedal. The driver brake valve includes a compressed air input configured to connect to a system pressure, a compressed air output configured to connect to a brake control line, a sensor configured to determine an actuation of the brake pedal, a characteristic curve storage device configured to store characteristic curve data, and a determining device. The sensor is configured to generate an actuating signal in dependence upon the actuation of the brake pedal. The determining device is configured to generate a sensor desired signal from the actuating signal in dependence upon the characteristic curve data.