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.

To provide a brake system for a saddled vehicle that exerts proper braking force control considering changes in the driver's posture during deceleration. A brake system for a saddled vehicle including a control device exerting automatic control over a brake fluid pressure of a front-wheel brake and that of a rear-wheel brake according to various information, and a throttle position detector for detecting a throttle position of a rotary-type throttle operating element mounted on a steering handlebar. When an operation on the throttle operating element is detected at start of automatic control over the front-wheel brake and the rear-wheel brake, if the throttle position is less than a predetermined threshold value, the control device maintains the automatic control, and if the throttle position is equal to or greater than the predetermined threshold value, the control device cancels the automatic control.

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 vehicle spring brake having a parking brake housing that defines a parking brake chamber and a service brake housing that defines a service brake chamber. A flexible membrane separates the parking brake chamber from the service brake chamber and flexes into and out of the service brake chamber based upon a pressure differential between an air pressure in the parking brake chamber and an air pressure in the service brake chamber. A pushrod extends out of the service brake housing when the flexible membrane flexes into the service brake chamber and retracts into the service brake housing when the flexible membrane flexes back out of the service brake chamber. A control valve controls the pressure differential to thereby control movement of the flexible membrane and the pushrod.

The pressure sensor functions as a first detection portion for detecting hydraulic pressure set according to operation of a brake pedal. The control unit detects the hydraulic pressure acting on the second piston portion through the pipe. The control unit controls differential pressure in the detected hydraulic pressure to a target value set according to vehicle speed.

A module for generating and supplying a control pressure for a pressure-controlled fluidic brake system of a first vehicle, the module comprising a valve unit comprising at least two stable switching states; a pressure source configured to provide a supply pressure to the valve unit; and an outlet port configured to supply the control pressure to the brake system of the first vehicle; wherein the module is configured to generate the control pressure from the supply pressure according to at least two operating modes which are respectively activated according to one of the at least two switching states of the valve unit; wherein the module is configured to set the generated control pressure according to a second of the at least two operating modes to a constant control pressure value to activate the brake system of the first vehicle to hold the first vehicle in at least one of a non-moving state and a parking state.

A vehicle brake system device is provided. The vehicle brake system device includes having a signal input apparatus for inputting request signals from a driver of the vehicle which includes a sensor device which gradually detects a degree of operation of a driver-operated operating element between a position which represents non-operation and a position which represents maximum operation, and generates an operating signal which represents this degree of operation. The signal input apparatus also includes an evaluation electronics system into which the sensor device operating signal is introduced for evaluation purposes. In a switched-off state of a vehicle ignition system the sensor device and/or the evaluation electronics system cyclically assume either a standby mode with reduced electrical energy consumption from an electrical energy source in comparison to an operating mode which prevails in the switched-on state of the vehicle ignition system, the reduced energy consumption is an energy consumption level insufficient to ensure operation of the sensor device and/or the evaluation electronics system for detecting and evaluating operation of the operating element as intended, or assume an energy-saving operating mode which ensures operation of the sensor device and/or of the evaluation electronics system to detect and evaluate operation of the operating element.

A method for controlling a pneumatic or electro-pneumatic service brake device of a vehicle is provided. In the method a driver brake request occurs by actuating a service brake actuating element of a service brake valve device of the braking device. In response to actuating the service brake actuating element, at least one control piston of the service brake valve device is loaded with a first actuating force in order to generate a pneumatic brake pressure or brake control pressure in at least one pneumatic service brake circuit of the service brake device. The control piston directly or indirectly controls at least one double-seat valve of the service brake valve device. The at least one double-seat valve includes an inlet seat and an outlet seat. The at least one control piston of the service brake valve device in addition is loaded by a second actuation force additionally or instead of the first actuation force. The second actuation force, which is generated independently of a driver braking request, is applied to the at least one control piston in parallel to the first actuation force, either in the same direction or in the counter direction.

A brake valve (10) for providing a brake pressure (pB) to a vehicle brake system (100) includes a housing (20), a pressure piece (16), configured to apply a force to a valve system (18) and slidably arranged in the housing (20) along a valve axis (22) between a neutral position and an actuation position, and a magnet (42) forming a moving part (40) of a position sensor (38) for detecting the position of the pressure piece (16). The magnet (42) is attached to the pressure piece (16) by a magnet support (64), and the magnet support (64) includes a saddle portion (68). The saddle portion (68) is detachably connected to the pressure piece (16).

A valve assembly includes a housing having an interior wall defining a chamber having a longitudinal axis. A piston is disposed in the chamber and is movable between first and second positions along the longitudinal axis, wherein the piston includes a piston head. The piston head has opposite first and second sides, longitudinally spaced first and second peripheral grooves disposed between the first and second sides, wherein the first and second grooves define a space therebetween, and a relief passage extending radially inwardly from the first groove and communicating between the space and the first side of the piston. Longitudinally spaced first and second O-rings are disposed in the first and second grooves and engage the interior wall.