An electrohydraulic vehicle power brake system for a motor vehicle driving autonomously on public roads. A power brake pressure generator of the vehicle power brake system having two hydraulically parallel power valves is connected to the vehicle brake system and the two power valves are controlled using two redundant electronic control units.

A brake control device adjusts a fluid pressure of a brake fluid in a wheel cylinder, and is provided with: a fluid passage which connects a master cylinder and the wheel cylinder; a first electromagnetic valve which is provided in the fluid passage; a second electromagnetic valve which is provided in the fluid passage between the first electromagnetic valve and the wheel cylinder; a fluid pump which is driven by an electric motor, suctions the brake fluid from the fluid passage at a suction part between the first electromagnetic valve and the second electromagnetic valve, and discharges the brake fluid to the fluid passage at a discharge part between the first electromagnetic valve UP and the second electromagnetic valve; a check valve which is provided between the fluid pump and the discharge part; and a controller which controls the first electromagnetic valve, the second electromagnetic valve, and the electric motor.

A hydraulic block of an electronic braking device for a vehicle may include: a block body including a controller mounting part to which an electronic control unit (ECU) is coupled and a motor mounting part to which a motor is coupled; an input port part disposed closer to the controller mounting part between the controller mounting part and the motor mounting part; an output port part disposed closer to the motor mounting part between the controller mounting part and the motor mounting part; and a hydraulic circuit part formed in the block body so as to extend from the input port part to the output port part, and housing a valve controlled by the ECU.

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.

A braking control device comprising: an operation amount acquisition device that obtains an operation amount for a braking operation member; a pressurizing unit that presses a friction member to a rotating member fixed to a wheel using an electric motor; a control that controls output of the electric motor based on the operation amount; a pressing force acquisition device that obtains the actual pressing force of the friction member pressing on the rotating member; and a rotation angle acquisition device that obtains the actual rotation angle of the motor. The control: stores the correlation between the actual pressing force and the actual rotation angle; approximates a function map indicated by a second degree or higher polynominal, based on the correlation; calculates a target rotation angle based on the operation amount and the function map; and controls the electric motor to match actual rotation angle and the target rotation angle.

A hydraulic circuit comprises: a first pressure-boosting flow path that connects a first main flow path and a first wheel cylinder; a first pressure-boosting valve that is disposed in the first pressure-boosting flow path and that opens in a non-energized state; a first pressure-reducing flow path that connects the first wheel cylinder and a reservoir; a first pressure-reducing valve that is disposed in the first pressure-reducing flow path and that closes in a non-energized state; a second pressure-boosting flow path; a second pressure-boosting valve; a second pressure-reducing flow path; and a second pressure-reducing valve. A control unit comprises: a first drive circuit that controls the first pressure-reducing valve; and a second drive circuit that is separate from the first drive circuit and that controls the second pressure-reducing valve.

A vehicle braking device includes a master cylinder device, a motor cylinder device, first and second shutoff valves (solenoid valves) of a normally-open type which are provided in piping tubes (hydraulic pressure passages) providing communication between the master cylinder device and the motor cylinder device and which operate to open or close the hydraulic pressure passages, and an integrated control unit which performs drive control to close the solenoid valves in response to a pressure rise request. When a pressure rise request is received from any requester, the integrated control unit sets a valve closing characteristic in the course of closing the solenoid valves from the time of reception of the pressure rise request such that the valve closing characteristic for the pressure rise request issued by a second group requester is gentler than the valve closing characteristic for the pressure rise request issued by a first group requester.

A method for ascertaining a leakage in a hydraulic braking system of a motor vehicle, the braking system including at least one hydraulically actuatable wheel brake, at least one pressure generator and at least one discharge valve which is assigned to the wheel brake and actuated as a function of a driving situation of the motor vehicle to maintain driving stability, and a hydraulic volume of the braking system being monitored. It is provided that the leakage is ascertained as a function of the ascertained hydraulic volume and as a function of an actuation of the discharge valve.

A brake system for a motor vehicle, wherein the brake system is divided into two blocks, wherein a separate electric pressure generator is arranged in each block, and a motor vehicle having such a brake system.

A vehicular braking device including a pump that discharges a brake fluid to an upstream part connected to two wheel cylinders; a first solenoid valve that adjusts a differential pressure between a master pressure and an upstream pressure that is the pressure of the upstream part; a second solenoid valve that adjusts the pressure of a wheel cylinder; a third solenoid valve that adjusts the pressure an other wheel cylinder; and a control part that controls the pressures of the two wheel cylinders. The control part sets the amount of the brake fluid discharged by the pump on the basis of a required fluid amount to increase the pressure of the low-pressure-side wheel cylinder among the two wheel cylinders up to the same pressure as a target value for the pressure of the high-pressure-side wheel cylinder.