Provided is a plunger pump where quietness can be ensured. A plunger pump includes a cylinder, a piston, a discharge valve, and a plug member. The plug member includes: a recessed portion formed on a circumferential wall of a discharge chamber opposing an outer periphery of the discharge valve in a radial direction; and a discharge passage disposed at a position different from the recessed portion, formed on the circumferential wall of the discharge chamber opposing the outer periphery of the discharge valve in the radial direction, and connecting the discharge chamber and the outside with each other.

A pump assembly for generating a brake pressure in a hydraulic slip-controlled power vehicle braking system, including a fluid sensor between an electric motor and a piston cylinder unit with the aid of which a small brake fluid quantity inadvertently leaking from the piston cylinder unit in the form of leakage is ascertainable before it affects a function of an electronic control or the electric motor.

A master cylinder of a brake for a vehicle includes: a housing that is provided with ports through which oil flows; a motor that is connected to the housing and supplies rotation power; a screw that is rotatably installed inside the motor and is supplied and rotated with the rotation power of the motor; a movable piston that is engaged with an outside of the screw and is moved in a longitudinal direction of the housing by the rotation of the screw; a guide that is caught on the housing, subjected to restraint of rotation, and installed to be movable in the longitudinal direction of the housing, restrains rotation of the movable piston, and guides linear motion of the movable piston in the longitudinal direction.

The present disclosure relates to a method for controlling a hydraulic brake system during a regenerative braking process. In the method, a hydraulic fluid is displaced in the direction of a wheel brake by means of a brake cylinder. In the method, furthermore, at least a volume fraction of the hydraulic fluid is conducted via a pressure dissipation valve into an accumulator, an isolation valve is adjusted in the direction of a closed state in order to at least partially hydraulically isolate the wheel brake from the brake cylinder, and at least a volume fraction of the hydraulic fluid is conveyed out of the wheel brake by means of a pump. The present disclosure furthermore comprises a hydraulic brake system for a motor vehicle, a computer program product, a control unit and a motor vehicle.

The present disclosure relates to a method for controlling a hydraulic brake system during a regenerative braking process. In the method, a displacement of a hydraulic fluid in the direction of a wheel brake is performed by means of a brake cylinder. The method comprises the step whereby an isolation valve which is assigned in terms of flow to the wheel brake and which is situated in a flow path of the hydraulic fluid is adjusted in the direction of a closed state in order to set a pressure difference between a region positioned upstream of the isolation valve in terms of flow and a region positioned downstream of the isolation valve in terms of flow. The present disclosure furthermore comprises a hydraulic brake system for a motor vehicle, a computer program product, a control unit and a motor vehicle.

A method for controlling a hydraulic brake system during a regenerative braking process where a displacement of a hydraulic fluid in the direction of a wheel brake is performed by means of a brake cylinder and at least one volume fraction of the hydraulic fluid is conducted via a pressure dissipation valve, which is situated in an open position, into an accumulator. In the method, furthermore, the pressure dissipation valve is adjusted in the direction of a closed state, in order to realize an increase of a hydraulic braking torque effected by the wheel brake, if an overall braking torque which is made up of the hydraulic braking torque and a generator braking torque effected by an electric machine is lower than a braking torque demand, and if the generator braking torque lies below a braking torque limit of the electric machine.

A method for controlling a hydraulic brake system during a regenerative braking process which utilizes a generator braking torque effected by an electric machine is provided. A hydraulic fluid is displaced in the direction of a wheel brake by means of a brake cylinder, and at least a volume fraction of the hydraulic fluid is conducted into an accumulator. The method comprises the step whereby at least a volume fraction of the hydraulic fluid is conveyed from the accumulator in the direction of the wheel brake by means of a pump, in order to realize an increase of a hydraulic braking torque effected by the wheel brake, if a braking torque demand is higher than a braking torque limit of the electric machine.

A method for checking functionality of a motor vehicle braking system. The braking system has a main module, including: hydraulically actuatable wheel brakes, pairs being assigned to respective brake circuits; at least one electrically actuatable wheel valve per wheel brake sets wheel-specific brake pressures; a pressure provision device actively builds up pressure in the wheel brakes; a pressure-medium reservoir at atmospheric pressure, and an auxiliary module, which has for each of two wheel brakes: a pressure sensor for measuring pressure in a wheel brake line; an open when deenergized isolating valve in the wheel brake line; a pump. At least one variable is measured to assess functionality of the braking system. Using least one acceptance criterion, and checked whether the variable satisfies the acceptance criterion. Determining at least one variable representing the viscosity of the brake fluid, and the at least one acceptance criterion depends on a variable representing viscosity.

An electromechanical brake pressure generator for a hydraulic braking system of a vehicle, including a threaded drive system for converting a drive-side rotary motion into a translatory motion for brake pressure generation. The system includes a spindle rotatable via an electric motor, a spindle nut cooperating with a thread of the spindle so the spindle nut is axially displaceable with a rotation of the spindle and a brake fluid is loadable or relievable, and a housing which, together with the spindle nut, forms an anti-twist protection which secures the spindle nut against twisting during rotation of the spindle. The spindle nut forms at least one spindle nut reference surface, which cooperates with at least one stop surface, which is stationary with respect to the housing, in a relief end position of the spindle nut in such a way that an instantaneous axial position of the spindle nut is determinable therefrom.

An electromechanical brake pressure generator for a hydraulic braking system of a vehicle. The electromechanical brake pressure generator includes at least one threaded drive system for converting a drive-side rotary motion into a translatory motion for the brake pressure generation. The threaded drive system includes a rotatable spindle nut, and a spindle cooperating with a thread of the spindle nut so that the spindle is axially displaceable with a rotation of the spindle nut. The threaded drive system includes a drive wheel, which is non-rotatably situated on the spindle nut and via which the spindle nut is connected to the electric motor, the drive wheel and the spindle nut being designed as separate plastic components, including a plurality of mutually corresponding connecting structures which, in the assembled state, engage one another in a form-locked manner in such a way that a torque required for rotating the spindle nut is transmittable.