A brake system for actuating a pair of front wheel brakes and a pair of rear wheel brakes is selectively operable during a manual push-through mode. A primary power transmission unit actuates at least one of wheel brakes in a normal braking mode. A secondary power transmission unit actuates the front wheel brakes in a backup braking mode. A primary electronic control unit controls at least one of the primary power transmission unit and a pair of rear brake motors. A secondary electronic control unit controls at least one of the secondary power transmission unit and the rear brake motors. An ABS modulator arrangement is hydraulically interposed between at least one of first and second three-way valves and at least a selected wheel brake. A multiplex control valve arrangement is hydraulically interposed between the secondary power transmission unit and the front wheel brakes.

A hydraulic assembly of a traction control system of a hydraulic vehicle brake system includes a hydraulic block, a motor block, and a control device. The hydraulic block includes at least one electric hydraulic valve and at least one electric hydraulic pump arranged therein. The motor block includes an electric motor arranged therein. The electric motor is configured to drive the at least one hydraulic pump. The control device is configured to control the at least one hydraulic valve, the at least one hydraulic pump, and the electric motor. The control device has two structurally separate control units, which include a first control unit with signal components and a second control unit with power components.

A hydraulic assembly of a traction control system of a hydraulic vehicle brake system includes a hydraulic block, a motor block, and a control device. The hydraulic block includes at least one electric hydraulic valve and at least one electric hydraulic pump arranged therein. The motor block includes an electric motor arranged therein. The electric motor is configured to drive the at least one hydraulic pump. The control device is configured to control the at least one hydraulic valve, the at least one hydraulic pump, and the electric motor. The control device has two structurally separate control units, which include a first control unit with signal components and a second control unit with power components.

The braking control device decelerates a vehicle by automatically increasing a brake fluid pressure as a hydraulic pressure in a wheel cylinder at the time when a braking operation member is not operated, and includes: a pressure regulating valve provided to a connection path for connecting a master cylinder and the wheel cylinder and regulating a differential pressure between a master cylinder hydraulic pressure as a hydraulic pressure in the master cylinder and the brake fluid pressure; a fluid pump driven by an electric motor and discharging a brake fluid into the connection path between the pressure regulating valve and the wheel cylinder; and a controller controlling the pressure regulating valve and the electric motor. When the brake fluid pressure no longer has to be increased, the controller closes the pressure regulating valve and stops driving the electric motor.

The braking control device decelerates a vehicle by automatically increasing a brake fluid pressure as a hydraulic pressure in a wheel cylinder at the time when a braking operation member is not operated, and includes: a pressure regulating valve provided to a connection path for connecting a master cylinder and the wheel cylinder and regulating a differential pressure between a master cylinder hydraulic pressure as a hydraulic pressure in the master cylinder and the brake fluid pressure; a fluid pump driven by an electric motor and discharging a brake fluid into the connection path between the pressure regulating valve and the wheel cylinder; and a controller controlling the pressure regulating valve and the electric motor. When the brake fluid pressure no longer has to be increased, the controller closes the pressure regulating valve and stops driving the electric motor.

This braking control device pumps a brake fluid from a reservoir to each wheel cylinder by one fluid pump and includes an electric motor which drives the fluid pump; and a controller which controls the electric motor. The controller calculates a target fluid pressure on the basis of at least one among the vehicle wheel speed, the vehicle deceleration state, and the turning state of the vehicle, calculates a target discharge amount for the fluid pump on the basis of the target fluid pressure, and controls the electric motor on the basis of the target discharge amount. The controller has a front wheel calculation map of the relationship between the fluid pressure and the inflow volume of the brake fluid corresponding to a front wheel cylinder, and a rear wheel calculation map corresponding to a rear wheel cylinder, and calculates the target discharge amount on the basis of the maps.

This braking control device pumps a brake fluid from a reservoir to each wheel cylinder by one fluid pump and includes an electric motor which drives the fluid pump; and a controller which controls the electric motor. The controller calculates a target fluid pressure on the basis of at least one among the vehicle wheel speed, the vehicle deceleration state, and the turning state of the vehicle, calculates a target discharge amount for the fluid pump on the basis of the target fluid pressure, and controls the electric motor on the basis of the target discharge amount. The controller has a front wheel calculation map of the relationship between the fluid pressure and the inflow volume of the brake fluid corresponding to a front wheel cylinder, and a rear wheel calculation map corresponding to a rear wheel cylinder, and calculates the target discharge amount on the basis of the maps.

A multiple-circuit hydraulically open braking system, for a highly automated or autonomous vehicle, includes at least two wheel brakes each assigned to a braking circuit having a pressure relief path, two multiple-circuit pressure generators hydraulically connected in series between a fluid container and the at least two wheel brakes, and a hydraulic unit for hydraulically connecting the pressure generator to the at least two wheel brakes and for individual brake pressure modulation in the at least two wheel brakes. A first pressure generator is configured as a plunger system and is assigned to a main system having a first energy supply and a first evaluation and control unit. A second pressure generator is configured as a second plunger system or as a pump system and is assigned to a secondary system having a second energy supply that is independent from the first energy supply and a second evaluation and control unit.

A multiple-circuit hydraulically open braking system, for a highly automated or autonomous vehicle, includes at least two wheel brakes each assigned to a braking circuit having a pressure relief path, two multiple-circuit pressure generators hydraulically connected in series between a fluid container and the at least two wheel brakes, and a hydraulic unit for hydraulically connecting the pressure generator to the at least two wheel brakes and for individual brake pressure modulation in the at least two wheel brakes. A first pressure generator is configured as a plunger system and is assigned to a main system having a first energy supply and a first evaluation and control unit. A second pressure generator is configured as a second plunger system or as a pump system and is assigned to a secondary system having a second energy supply that is independent from the first energy supply and a second evaluation and control unit.

A fluidic control system (1) for controlling a vehicle, which includes a controller (2) and a closed fluidic circuit. The circuit includes a pump (3) for pressurizing fluid in the circuit, valve means (40, 50, 60), an actuator (4, 5, 6) and a precharge accumulator (7). The valve means (40, 50, 60) is fluidly connected to the inlet and outlet of the pump (3) and the actuator (4, 6) is fluidly connected to the valve means (40, 50, 60) for selectively receiving pressurized fluid therefrom. The precharge accumulator (7) includes a movable member (73, FIG. 2) that describes a variable volume (71) fluidly connected to the circuit between the valve means (40, 50, 60) and the inlet of the pump (3). The system (1) also includes a sensor (70) for determining the position of the movable member (73) for estimating the quantity of fluid and/or detecting an abnormal pressure variation within the circuit.