A hydraulic brake system for a vehicle includes a master brake cylinder, a hydraulic unit, and multiple wheel brakes. The hydraulic unit Ha at least one brake circuit for modulating the braking pressure in the wheel brakes. At least one wheel brake is paired with a bistable solenoid valve, which is looped into the corresponding fluid channel directly upstream of the paired wheel brake and which enables the braking pressure in the paired wheel brake to be modulated in a de-energized open position and locks the current braking pressure in the paired wheel brake in a de-energized closed position, wherein a volume equalization device which comprises a connectable accumulator opens into the corresponding fluid channel between the bistable solenoid valve and the paired wheel brake.

A control system for wheel-slip prevention in a railway vehicle with a pneumatic brake is provided. The control system comprises an input interface configured to accept a deceleration reference for controlling the pneumatic brake, and a memory configured to store a reference governor providing executable instructions for modifying the deceleration reference upon its violation of a wheel-slip constraint, and configured to store a controller providing executable instructions for mapping the modified deceleration reference to a sequence of control commands for controlling pressure applied by the pneumatic brake. The control system further comprises a processor configured to execute the reference governor to modify the deceleration reference and configured to execute the controller to map the modified deceleration reference to the sequence of control commands. Further, an output interface of the control system is configured to output the sequence of control commands to control the pneumatic brake.

A vehicle braking system includes a master cylinder, and a wheel cylinder. A primary braking unit includes a first pressure generating unit distinct from the master cylinder and is operable to actuate a braking action at the wheel cylinder in a primary mode of operation. The primary braking unit further includes an outlet port connecting the primary braking unit to the wheel cylinder. A secondary braking unit includes a second pressure generating unit distinct from the master cylinder and operable to actuate a braking action at the wheel cylinder in a secondary mode of operation. The secondary braking unit an inlet port connected to the outlet port of the primary braking unit. The primary braking unit includes one or more ABS valves operable to control traction control and anti-lock braking in the primary mode of operation and located between the first pressure generating unit and the outlet port of the primary braking unit. The secondary braking unit is located between the one or more ABS valves and the wheel cylinder.

In a method for the automatic parameterization of a braking system in a vehicle, a brake pressure profile is predefined as a test run during a test drive operation, and the wheel slip which thereafter arises is ascertained. If the wheel slip is outside a permissible value range, the brake pressure is modified and a new test run is carried out.

A method for defining at least one characteristic curve which, in a pressure-actuated brake system of a vehicle, represents a relationship between a brake pressure and a brake demand), and for operating a pressure-actuated brake system of a vehicle, in which at least one brake cylinder can be supplied with a pressurized medium under a brake pressure, and in which the brake pressure is formed based on at least one such characteristic curve, and to a pressure-actuated brake system of a vehicle in which at least one brake cylinder can be supplied with a pressurized medium under a brake pressure.

A variable type flex brake system includes: a driving control unit that receives interior or exterior information of a vehicle, provides an autonomous driving control mode or a normal driving control mode, calculates a required braking force in the autonomous driving and normal driving control modes, and generates a braking force signal corresponding to the required braking force; a first selection unit selecting a braking slope corresponding to a speed belonging to any one of low-speed, medium-speed, and high-speed sections to generate a first braking map; a second selection unit selecting a braking slope corresponding to a speed belonging to remaining speed sections that are not selected in the first selection unit, to generate a second braking map; and a braking control unit generating a braking-hydraulic-pressure signal based on the first or second braking map in response to the required braking force signal.

A device for actuating valves and determines an actuation duration for a valve of a target system from a specified actuation duration for a valve of a reference system with which a required pressure change can be achieved in the reference system in order to achieve the required pressure change in the target system. The device ascertains the effective valve opening time belonging to the specified actuation duration for the valve of the reference system, calculates the effective opening time of the valve of the target system from the effective opening time said opening time of the valve of the target system being used to achieve the same pressure change in the target system as in the reference system, and then determines a valve actuation duration required to achieve the effective opening time of the valve of the target system.

A motor vehicle includes at least one hydraulically actuatable wheel braking device and at least one electric drive motor. A method for operating the vehicle includes monitoring a driver behavior upon an emergency braking operation, and activating the hydraulic wheel braking device for generating a hydraulic emergency braking torque when an emergency braking operation is detected. When the emergency braking torque is detected, the drive motor is also operated as a generator in order to generate an additional electrical emergency braking torque.

A method for monitoring a hydraulic brake system for a motor vehicle, wherein a diagnostic valve is omitted and, instead, air volume and leakage are identified by a volume balance during generation of a dynamic pressure. An associated brake system is also disclosed.

A hydraulic braking arrangement for controlling front brakes and rear brakes of an off-road vehicle includes a hydro-mechanical service brake system fluidly connecting front and rear brakes to a first source of fluid in pressure by means of a mechanical input which may be imparted by a driver of said off-road vehicle. The hydraulic braking arrangement also includes an additional service brake system fluidly connecting front and rear brakes to a second source of fluid in pressure by means of an electro-hydraulic proportional valve and a remote input.