This application provides a hydraulic adjustment unit, a brake system, an automobile, and a control method, to individually pressurize any brake pipe in a dual circuit brake pipe, to improve safety of a dual circuit brake system. This application is applicable to an intelligent car, a new energy car, a conventional car, or the like. In embodiments of this application, a second hydraulic chamber provides a braking force for a first group of brake wheel cylinders and through a first brake pipe provided with a first control valve, and provides a braking force for a second group of brake wheel cylinders and through a second brake pipe provided with a second control valve.

An electronic hydraulic brake device includes: a pedal master to generate hydraulic pressure through pressurization of a pedal and including first and second master chambers; a reservoir including first and second reservoirs to store hydraulic fluid; an electric master to generate hydraulic pressure and including forward and backward chambers; a wheel cylinder to provide a braking force to front and rear wheels; a storage line connecting the pedal master and the reservoir to guide hydraulic fluid; a forward chamber line connecting the first master chamber, the forward chamber, and the wheel cylinder to guide hydraulic fluid; a backward chamber line connecting the second master chamber, the backward chamber, and the wheel cylinder to guide hydraulic fluid; and a connector selectively connecting the forward chamber line and the backward chamber line to guide hydraulic fluid.

The present disclosure provides a vehicle brake comprising: a reservoir configured to store a fluid therein; a hydraulic circuit configured to transfer a hydraulic pressure to a wheel of a vehicle; a plurality of valves disposed to regulate a flow of the fluid in the hydraulic circuit; and a master cylinder including a cylinder body, a main piston which is movably disposed within the cylinder body and in which a receptacle is formed at one side thereof, and a center piston which is disposed within the cylinder body and in which a penetration hole is formed in at least a part thereof, wherein the penetration hole is formed to have a size smaller than a cross-sectional area of the receptacle, and as the main piston moves, at least a part of the center piston is inserted into the receptacle, and thus a pressurizing area of the main piston decreases.

A motor vehicle brake system includes a master brake cylinder actuatable by a brake pedal and having only one pressure chamber; an electrically controllable pressure supply device; a pressure medium reservoir, under atmospheric pressure from which the master brake cylinder and the pressure supply device are supplied with pressure medium; and at least two hydraulically actuatable wheel brakes. The wheel brakes can be actuated by the master brake cylinder or by the pressure supply device. The pressure chamber of the master brake cylinder is separably connected via an isolating valve to a first brake circuit supply line. The wheel brakes are divided into at least two wheel brake groups. The first wheel brake group connected to the first brake circuit supply line, and the pressure supply device connected to a second brake circuit supply line to which the second wheel brake group is connected.

A compensation control system is provided for preventing braking inconvenience of a flex brake that compensates for brake hydraulic pressure only for initial braking when a brake mode is forcibly switched, thus allowing a driver to recognize a change in braking force, and thereby improving stability when a vehicle is driven. The control system forcibly switches the brake mode, selected by a driver when a booster system fails, into a normal brake mode, and compensates to reduce the magnitude of brake hydraulic pressure, which is to be reduced when the brake mode is forcibly switched, during initial braking.

A brake pedal is operated by a pedal force of a driver. A sensor is capable of detecting a stroke amount of the brake pedal. A brake circuit generates braking force to apply a brake to a vehicle by applying hydraulic pressure to wheel cylinders provided to respective wheels. An electronic control device controls the braking force generated by the brake circuit based on an output signal from the sensor and a state of the vehicle. The electronic control device executes predetermined braking force control under which the braking force generated by the brake circuit is set to be predetermined braking force, when the stroke amount of the brake pedal is between a first threshold and a second threshold larger than the first threshold.

A brake system to couple between brakes and actuators provides a modular format that allows a plurality of braking modules to be coupled together at interfaces and coupled to other modules to handle a variety of different braking scenarios. Each braking module includes a housing forming a manifold for the delivery of fluid to the interfaces of the modules for exchange between the modules. The braking modules include a hydraulic valve coupled with a pressurized fluid source for delivering fluid to implement a braking function. The modules also include an electro-hydraulic valve configured for receiving electrical input signals and configured for delivering fluid from the pressurized fluid source to the hydraulic valve at an actuation pressure that is proportional to the system pressure based on the levels of the received electrical input signals. Module interfaces are positioned on respective sides of the housings for coupling the braking modules together and include a repeated pattern of apertures for aligning between the braking modules. The aligned apertures are configured for passing fluid at the system pressure and fluid at the tank pressure between the plurality of braking modules.

A brake system for vehicles, comprising hydraulically actuatable wheel brakes, a first electrohydraulic brake control device, having an associated pressure-medium. The first brake control device comprises a first pressure-providing device for supplying the wheel brakes. An inlet valve and an outlet valve for setting wheel-specific brake pressures, and a wheel-specific output pressure connection connected to the pressure-medium reservoir by the outlet valves. A second electrohydraulic brake control device, comprises a second pressure-providing device with a first pump having a suction side and a pressure side for supplying a first wheel brake of the wheel brakes. The second brake control device is connected downstream of the first brake control device and the suction side of the first pump is connected to a first of the output pressure connections of the first brake control device. A check valve is connected in parallel with the outlet valve of the first output pressure connection.

A brake system for a vehicle is provided. The brake system is designed to selectively apply pressure to and release it from at least two pressure connectors for brake actuators, and each of the pressure connectors can be coupled to an associated brake actuator of a wheel of the vehicle. The brake system has a master brake module and an auxiliary brake module, wherein the master brake module and the auxiliary brake module each have at least one sensor for detecting a fluid pressure in the respective brake module, and with a control unit which is configured to monitor and compare a fluid pressure in the master brake module and in the auxiliary brake module by the measured values detected by the sensors, and, based on the pressure and/or pressure curve, to draw a conclusion about the functional capability of the auxiliary brake module. A method is furthermore provided for performing a functional test of the brake system.

A method for braking a vehicle includes at least reducing a hydraulic brake pressure in at least one wheel brake device disposed on a vehicle axle in response to an at least partial failure of a brake boosting of a hydraulic brake with at least one first brake circuit and at least one second brake circuit. The method further includes operating an electric brake motor of an electromechanical braking device to produce a braking force on the at least one wheel brake device.