A stroke simulator is configured in such a manner that an elastic member disposed in a cylinder of the stroke simulator is restricted from being deformed in a radial direction of the cylinder.

A control device operates a vehicle hydraulic brake system (a) in a fallback mode during which a simulator isolating valve is closed and a brake circuit isolating valve is open, (b) in a simulator mode during which the simulator isolating valve is open and the brake circuit isolating valve is closed, and (c) to transition from the fallback mode to the simulator mode using an intermediate mode in which, at least once, the simulator isolating valve and the at least one brake circuit isolating valve are simultaneously closed for a first time interval, the simulator isolating valve and the at least one brake circuit isolating valve are simultaneously open for a second time interval, and the simulator isolating valve is closed for a third time interval, while the at least one brake circuit isolating valve is open at least part of the time during the third time interval.

A hydraulic apparatus is disclosed, which includes a hydraulic cylinder body, a piston, a push assembly, and a first sealing component; the hydraulic cylinder body is of a hollow cylinder shape, provided with a first opening and a second opening respectively at two ends; the piston is disposed in the hydraulic cylinder body and is located at the first opening; the first sealing component covers the second opening; the hydraulic cylinder body, the piston, and the first sealing component are configured to form a hydraulic chamber; the hydraulic cylinder body is provided with a liquid flow opening which is located between the first sealing component and the piston; and the piston is configured to be enabled to move in the hydraulic cylinder body, driven by the push assembly.

A brake system for selectively actuating at least one of a pair of front wheel brakes and a pair of rear wheel brakes includes a reservoir and a master cylinder. A power transmission unit is configured for selectively providing pressurized hydraulic fluid. A pair of rear brake motors selectively electrically actuate rear parking brakes. An electronic control unit controls at least one of the power transmission unit and the pair of rear brake motors. A normally-closed DAP valve is located hydraulically between the power transmission unit and at least one of a two-position three-way valve and at least the selected one of the pairs of wheel brakes. An isolation valve and a dump valve are associated with each wheel brake.

A pedal-travel simulator of a hydraulic power vehicle brake system is connected to a brake-fluid reservoir by way of a groove between two piston seals of a power brake-pressure generator. Any air bubbles in the brake fluid get out of the pedal-travel simulator into the brake-fluid reservoir, and the piston seals are lubricated with the brake fluid.

The present disclosure in at least one embodiment provides a braking apparatus including a rod configured to translate in response to a depression of a brake pedal, a master cylinder configured to receive brake oil and to be responsive to insertion of the rod for discharging brake oil contained, a motor, a gear mechanism having at least some part connected to the master cylinder and at least some other part connected to the motor, and a securing member which includes a gear-side joint configured in at least some part of the securing member to be fastened to the gear mechanism and the master cylinder, and a motor-side joint configured in at least some other part of the securing member to be fastened to the motor.

A brake actuating device of a vehicle brake system has a pump housing which has a housing opening surrounded by a wall. The housing opening includes a housing axis along which a piston is to be accommodated in the housing opening in an axially displaceable manner. The housing opening further has a guide region in which a guide element to be arranged between the wall and the piston is to be accommodated. The brake actuating device further has a projection projecting from the wall into the housing opening. The projection is provided axially next to the guide region in the housing opening. The guide element is placed axially on the projection.

A hydraulic control unit for a vehicle, including a hydraulic fluid reservoir with a hydraulic fluid reservoir space, out of which a hydraulic pressure generator is able to suction hydraulic fluid, an air space and a piston movingly accommodated in the hydraulic fluid reservoir, which separates the hydraulic fluid reservoir space and the air space from each other, wherein the air space is connectable and/or connected to an interior space of the hydraulic control unit, and a hydraulic motor vehicle braking system.

A vehicle braking device includes a first pressurizing unit including a cylinder, a piston slidable in the cylinder, an electric motor that drives the piston, and an output chamber partitioned by the cylinder and the piston. The first pressurizing unit is configured such that a connection state between the output chamber and a reservoir is switched between communication and cut-off states according to the piston position, and the first pressurizing unit is capable of pressurizing fluid by decreasing a volume of the output chamber by movement of the piston to one axial direction side; a pressure sensor that detects a pressure of the output chamber; and an estimation unit that executes a position estimation process of moving the piston and estimating a switching position of the piston at which the connection state of the output chamber and the reservoir is switched based on a detection value of the pressure sensor.

A hydraulic block of an electronic braking device for vehicles, includes: a first input port for receiving brake oil from a master cylinder; a first output port for discharging the brake oil to a wheel brake; a first inlet valve port for accommodating a first inlet valve disposed on a first inlet flow path connecting the first input port to the first output port; and a first outlet valve port for accommodating a first outlet valve disposed on a first outlet flow path configured to depressurize the brake oil. The first outlet flow path is configured to pressurize the first outlet valve in an axial direction of a first plunger mounted inside the first outlet valve and to deliver the brake oil to the first outlet valve.