A vehicle braking device includes: a brake fluid pressure generation device arranged in a storage chamber separated from a vehicle cabin; and a brake operation part mechanically connected to the brake fluid pressure generation device, the brake operation part being not provided in the vehicle cabin. The brake fluid pressure generation device includes a cylinder and pistons configured to slide inside the cylinder. The brake fluid pressure generation device is configured to generate brake fluid pressure in accordance with strokes of the pistons. The brake fluid pressure generation device is arranged such that a sliding direction of the pistons is along a direction different from the vehicle front-rear direction in a plan view.

Provided is a support structure for a plurality of electrically actuated brake fluid pressure generation devices provided in a vehicle in which automated driving is enabled, the brake fluid pressure generation devices being configured to generate brake fluid pressure. The support structure includes a support member (a first bracket, a second bracket, and an actuator bracket) via which a brake actuator and a brake unit are supported by frame members forming a storage chamber separated from a vehicle cabin. The support member is supported by the frame members at two points. The brake actuator and the brake unit are mechanically connected to each other via the support member.

Provided is a braking device capable of increasing boost responsiveness of wheel cylinders. The braking device includes a second chamber from which a brake fluid is discharged by a movement of a piston caused by inflow of the brake fluid flowed out from a master cylinder to a first chamber through a brake operation by a driver, and a pump configured to discharge the brake fluid into an oil passage for supplying the brake fluid flowed out from the second chamber to a wheel cylinder.

The present disclosure relates to a piston pump assembly comprising a piston with a variable stroke and to a hydraulic braking system comprising the same. The piston pump assembly comprises at least: a rotatable drive shaft defining an axis of rotation of the rotatable drive shaft; a cam disposed on the drive shaft; and the piston biased toward the cam and configured to reciprocate along a piston axis for displacing a hydraulic fluid. The cam is movable relative to the piston axis and is selectively placed in one of a first position at a first distance from the piston axis and a second position at a second distance from the piston axis; and wherein the cam comprises at least two portions each of which has, at a given position of the cam relative to the piston axis, a different non-circular cross section in a plane perpendicular to the axis of rotation and/or a different eccentricity with respect to the axis of rotation, the at least two portions of the cam comprising at least a first cam portion having a first non-circular cross section and/or a first eccentricity, and a second cam portion having a second non-circular cross section and/or a second eccentricity.

A piston pump for pumping a pressure medium in an electronically slip-controllable vehicle brake system includes a pressure-medium control valve configured to control a throughflow direction in a pressure medium circuit. The pressure-medium control valve has a valve housing, a valve seat, and a valve-closing body that is received in the valve housing in an axially movable and radially guided manner. The valve-closing body is configured to control the valve seat according to the prevailing pressure ratios upstream and downstream of the valve seat. The valve seat is configured as a single component with the valve housing. The pressure-medium control valve is produced by forming in a compact and cost-effective manner. The pressure-medium control valve operates quietly and is configured to be used alternatively as an independent unit that is configured to be tested prior to use.

A hydraulic unit, in particular for a controllable-slip vehicle brake system, includes a housing block, a pump, a first fluid duct, and a second fluid duct. The housing block defines a pump receptacle that receives the pump, which has a suction side and a pressure side. The first duct crosses the pump receptacle in a region of the pressure side of the pump. The second duct leads into the pump receptacle in the region of the pressure side. The first and second ducts are sealed off from each over via a separation point. The hydraulic unit is configured to enable contact with a damping device configured to damp pulsations and reduce operating noise of the hydraulic unit without negatively impacting functional properties of the hydraulic unit, in particular on pressure build-up dynamics of the vehicle brake system, or without jeopardizing a compact construction of the hydraulic unit.

A mechanical automotive vacuum pump includes a housing with a housing cylindrical bearing surface. A pumping chamber is arranged in the housing. A pump rotor which includes a rotor body having a rotor body bearing section and a chamber section is rotatably supported by the housing. A radial vane slit is arranged at the chamber section. A rotor body cylindrical bearing surface is arranged at the rotor body bearing section. The rotor body bearing section includes a circular lubrication ring groove. A radially shiftable pump vane is supported in the radial vane slit. A friction bearing is defined by the rotor body cylindrical bearing surface and the housing cylindrical bearing surface. The housing cylindrical bearing surface includes a lubrication inlet opening which lies in a same transversal plane as and opposite to the circular lubrication ring groove. The lubrication inlet opening is directly connected to a lubricant pump connector.

In a pump arrangement for a hydraulic unit of a vehicle brake system having a pump housing and a pump piston which is guided so as to be displaceable axially back and forth in the pump housing, a damping element is provided radially between the pump piston and the pump housing. The damping element damps vibrations of the pump piston which occur during an operation of the pump arrangement.

A piston pump includes a perforated disk as a throttle, in a central hole of which an outlet valve is arranged and its inner edge is fixed externally on a cylinder sleeve base of the piston pump and an outer edge of which lies with prestress on an annular support. Brake fluid displaced out of the piston pump lifts the perforated disk-shaped throttle off from the annular support, with which a dynamic throttle is formed. A throttle channel which negotiates the annular support in the perforated disk-shaped throttle also enables a throughflow in the case of a throttle lying on the annular support.

An electrohydraulic actuator assembly for use in a brake-by-wire hydraulic brake system. The electrohydraulic actuator assembly includes a pair of electrohydraulic actuator EHA units. One EHA unit provides fluid to front brakes and the other EHA unit provides fluid to rear brakes. Each EHA unit includes an electric motor, a reduction gear unit, a pair of magnetorheological clutches, and a pair of fluid pumps. The system further including an ECU that actuates the electric motor and controls engagement of the clutches to cause the fluid pump to pump brake fluid to at least one of the front and rear brakes. The system further includes a regeneration system for providing supplemental electricity to the electric motors.