A brake system for actuating a pair of front wheel brakes and a pair of rear wheel brakes includes a reservoir and a deceleration signal transmitter. First and second power transmission units are configured for selectively providing pressurized hydraulic fluid during a braking event. The first power transmission unit actuates a selected one of the front wheel brakes and a selected one of the rear wheel brakes. The second power transmission unit actuates the other one of the front wheel brakes and the other one of the rear wheel brakes. First and second electronic control units control the first and second power transmission units. A pair of rear brake motors selectively electrically actuate rear wheel brakes. Multiplex control of each of the pairs of front and rear wheel brakes is provided by an arrangement of first and second parallel valves for each wheel brake.

A brake system for actuating front and rear wheel brakes includes a reservoir and a master cylinder operable by actuation of a brake pedal connected to the master cylinder to generate brake actuating pressure at a first output for hydraulically actuating the front wheel brakes. A power transmission unit is configured for selectively providing pressurized hydraulic fluid for actuating the front wheel brakes. A pair of rear brake motors selectively electrically actuate respective rear wheel brakes. An electronic control unit controls at least one of the power transmission unit and the rear brake motors. A two-position three-way valve is hydraulically connected with the master cylinder and the power transmission unit and with the front wheel brakes. The three-way valve selectively controls hydraulic fluid flow from a chosen one of the master cylinder and the power transmission unit to at least one of the front wheel brakes.

A brake system includes two brake circuits having brake circuit lines for two vehicle axles and at least one hydraulic wheel brake in each brake circuit. Each wheel brake is connectable to a corresponding brake circuit or brake circuit line via a paired switch valve for pressure build-up and release in the wheel brake using a pressure supply device that can build up pressure in both brake circuits. At least one circuit separating valve blocks or releases a hydraulic connection line connecting the two brake circuits. At least one outlet valve connects an accumulator container to at least one brake circuit to release pressure. A master cylinder having only one working chamber is actuable by a brake pedal. The working chamber is connectable to the brake circuit line of a brake circuit. A switch valve is used to close or release the hydraulic line.

A brake system for motor vehicles may include an actuation device (e.g., brake pedal), a first piston-cylinder unit having at least one piston that separates two working chambers, a control device and a pressure supply unit driven by an electric motor and having a double-stroke piston delimiting working chambers. At least one brake circuit may have associated therewith at least one wheel brake, and each wheel brake may be connected to an associated hydraulic connecting line via a controllable switching valve. An outlet valve may be assigned to a single wheel brake or to a single wheel brake of each brake circuit in a hydraulic connection between the wheel brake and a pressure medium storage container.

The present disclosure relates to a valve block for a hydraulic brake system. The valve block for a hydraulic brake system includes a first valve row in which NO valve receiving bores to receive a plurality of NO valves are disposed, a second valve row in which NC valve receiving bores to receive a plurality of NC valves are disposed, a pair of pump receiving bores formed symmetrically to each other on opposite side surfaces to be disposed between the first and second valve rows and receiving a piston pump, a pair of first damping bores formed symmetrically to each other on the opposite side surfaces to be disposed above the first valve row and receiving a first pressure pulsation reducing device, a pair of second damping bores formed symmetrically to each other on an upper surface to be disposed above the first damping bores and receiving a second pressure pulsation reducing device, a pair of low pressure accumulator receiving bores formed symmetrically to each other on a lower surface, and a pressure sensor receiving bore formed on a front surface to be disposed adjacent to the pair of low pressure accumulator receiving bores.

A hydraulic arrangement for distributing a fluid in pressure coming from a source among multiple hydraulic units of a work vehicle. At least one of the hydraulic units provides an electronic load sensing signal and of the hydraulic units provides a hydraulic load sensing signal. The hydraulic arrangement includes a priority valve configured to divide the flow of fluid between the hydraulic units. The priority valve and source are hydraulically controlled by a first hydraulic load sensing signal resulting as the greatest of a plurality of hydraulic load pressure signals taken from the hydraulic unit. The hydraulic arrangement also includes a conversion unit configured to transform an electronic load sensing signal of at least one of the hydraulic units in an equivalent hydraulic load sensing signal so as to define the first hydraulic load sensing signal.

To check the functionality/leak-tightness of a brake-by-wire brake system, a motor-operated brake pressure transducer is actuated. In this case, a pressure medium would flow out into a reservoir via a master brake cylinder. A diagnostic valve is therefore provided between the master brake cylinder and the reservoir, which diagnostic valve is composed of a check valve and a restrictor connected in parallel with respect to the check valve. The outflow of pressure medium is limited by the restrictor. Because the gradient of the pressure dissipation can be calculated, a measured pressure build-up can be compared with that which is to be expected, and a determination of functionality/leak-tightness can be derived from the comparison.

A method for driving a braking circuit for a vehicle equipped with a coupling is disclosed.

The vehicle incudes a hydraulic supply circuit and a hydraulic control circuit equipped with a driving device.

The coupling includes a hydraulic braking circuit linked to the hydraulic supply circuit and to the hydraulic control circuit and includes a hydraulic accumulator.

When the vehicle is stopped and the pressure inside the hydraulic accumulator is less than or equal to a threshold pressure value, the driving deice increases the pressure of the hydraulic accumulator via the hydraulic control circuit.

A solenoid valve, in particular for controlling a brake pressure of a wheel brake of a motor vehicle, includes a pole core, an axially moveably mounted armature, a valve element, a closure element, a plunger, and a pressure spring. One end of the armature is associated with the pole core. The valve sealing element is arranged at another end of the armature. The armature has an axial through-opening. The closure element is force-lockingly and/or interlockingly retained in the axial through-opening in a selectable position. The plunger is axially moveably mounted in the axial through-opening, which provides a connection to the pole core in an installation position. The pressure spring is positioned in the axial through-opening and is retained in a pretensioned manner between the plunger and the closure element. The closure element is designed as a three-dimensionally convex element.

A solenoid valve for brake system includes a valve housing installed in a modulator block, and having an oil flow path; a valve seat installed in the inside of the valve housing, and forming an orifice; an armature configured to move up and down by a magnet core in the valve housing, and to open or close the orifice; a sleeve coupled with the valve housing, and accommodating the armature therein; a restoring spring configured to provide an elastic restoring force to the armature to close the orifice normally; and a damper member interposed between the magnet core and the armature.