An Anti-lock Braking System and control method are disclosed. The control method is performed after a control module intervenes a vehicle's braking system and comprises: receiving a wheel speed signal of a wheel and a vehicle acceleration signal; computing a tire-slip feedback value according to the wheel speed signal of the wheels and the vehicle acceleration signal; generating a feedback control voltage according to a tire-slip difference between a tire-slip target value and the tire-slip feedback value; generating a tire-slip compensation value by performing a differential compensation to the tire-slip feedback value; obtaining a feedforward voltage according to the tire-slip compensation value via a look-up table approach; generating a braking control voltage by adding the feedback control voltage to the feedforward voltage; and outputting the braking control voltage to a proportioning-valve brake, such that the proportioning-valve brake adjusts a braking pressure according to the braking control voltage.

A valve assembly for a braking system having a master cylinder side opening, at least one caliper side opening, and at least one valve pipe, connecting the master cylinder side opening and the caliper side opening. A shutter element has a shutter body movable with respect to the valve body. When the shutter body is in a valve closing position, it interrupts a at least one main fluid passage and defines a master cylinder side pipe stretch facing a master cylinder side opening and a caliper side pipe stretch facing a caliper side opening in the valve pipe. The shutter body at least partially delimits at least one secondary fluid passage, so that, when the shutter body is in a valve closing position, the master cylinder side pipe stretch is in fluid communication with the caliper side pipe stretch only through the secondary fluid passage.

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 light weight, low cost, failsafe aircraft hydraulic brake control system featuring a park-on-return function that enables antiskid and differential brake control when selecting the parking brake for emergency braking, a paired wheel shuttle function that provides backup to a failed brake control channel without the addition of a backup brake control system, configurable as a system of identical autonomous brake control pods, each containing all the valves and sensors for controlling a subset of brakes thus limiting a worst case failure to affecting just those brakes, simplifying the hydraulic system installation and creating a complete reusable standard hydraulic brake control module.

A valve of a piston pump for a vehicle brake system having a closing body which is resiliently preloaded against a sealing seat. The closing body is formed in two parts with a damping piston and a closing element inserted therein. The damping piston is axially displaceably guided in a cylindrical piston guide. At least one flow channel is provided between the damping piston and the piston guide. The at least one flow channel is configured such that fluid can flow around the damping piston in the longitudinal direction thereof through the at least one flow channel.

The disclosure relates to an actuating system for a vehicle brake, with an actuating arrangement, in particular a brake pedal, at least one (first) piston-cylinder unit, which is connected via a hydraulic line to the vehicle brake (braking circuit) in order to supply the braking circuit with pressure medium and apply pressure to the vehicle brake, and with a drive for the piston-cylinder unit. Pressure medium can be fed to the braking circuit in controlled manner in both piston movement directions, in particular the advance stroke and the return stroke, by means of at least one, in particular stepped, piston of the piston-cylinder unit.

According to one embodiment, for example, when it is determined that a certain condition has been satisfied while first antilock control is being executed, a controller of a brake control apparatus executes second antilock control by opening and closing a solenoid valve with a motor stopped so that brake fluid of the wheel cylinder is caused to flow into a reservoir, the second antilock control including a second pressure reduction mode, the second pressure reduction mode reducing a pressure of a wheel cylinder while substantially equilibrating the pressure of the wheel cylinder and a pressure of the reservoir at a certain pressure or larger, the certain pressure being larger than zero.

A hydraulic brake system is disclosed which may include a supply pump pressurizing a brake control system via a brake control supply line; a pressure-released brake connected to the brake control system via a brake line; a pressure relief valve with an inlet connected to the brake control supply line and an outlet connected to a relief valve discharge line; a make-up line connecting the brake line and the relief valve discharge line; and a check valve on the make-up line allowing one-way flow from the relief valve discharge line to the brake line.

An electronic brake system and a method for operating the same are disclosed. The electronic brake system includes a hydraulic-pressure supply device and a hydraulic-pressure control unit. The hydraulic-pressure supply device operates a hydraulic piston using an electric signal corresponding to a displacement of a brake pedal, and thus generates hydraulic pressure. The hydraulic-pressure control unit controls hydraulic pressure of a pressure medium supplied to individual wheel cylinders. The electronic brake system controls a plurality of valves mounted to the hydraulic-pressure control unit, and thus performs a normal operation mode, an abnormal operation mode, a regenerative braking mode, and an inspection mode using the valves.

A hydraulic brake system is disclosed which may include a supply pump pressurizing a brake control system via a brake control supply line; a pressure-released brake connected to the brake control system via a brake line; a pressure relief valve with an inlet connected to the brake control supply line and an outlet connected to a relief valve discharge line; a make-up line connecting the brake line and the relief valve discharge line; and a check valve on the make-up line allowing one-way flow from the relief valve discharge line to the brake line.