Abstract: An apparatus for damping pressure fluctuations in hydraulic motor vehicle systems with an anti-skid and/or traction control system, the apparatus comprises a throttle and a pressure limiting valve. The apparatus comprises a sleeve-like housing with a screen-like throttle body received in it along with a prestressed compression spring with which the throttle body is supported on the bottom of the housing. The housing and the throttle body are embodied as molded sheet-metal parts. On its bottom, the housing has an opening, with a valve seat, made by stamping without metal cutting, of a pressure limiting valve, which is engaged by the throttle body, which has a stamped bulge of rounded shape. A throttle opening of the throttle body, located in the bulge, is disposed coaxially with the larger-diameter opening of the housing. The apparatus can be used in hydraulic motor vehicle brake systems with an anti-skid and/or traction control system.

Abstract: A housing block for a hydraulic braking system which accommodates inlet and outlet solenoid valves in such a way that a flow medium through the inlet and outlet valves is circulated in pairs in immediate succession The inlet solenoid valves are located lower in said housing block than the outlet solenoid valves so that the fluid can flow back to low pressure reservoirs, and air can flow upwards via the outlet solenoid valves to the wheel brake cylinders for the purpose of venting air from the system. The housing block is intended for a hydraulic braking system which is equipped with an anti locking device.

Abstract: A brake booster for a pressure-fluid-actuated, and in particular hydraulic, brake system equipped with both ABS and traction control has a servo piston that is controllable by a brake pedal, and an additional piston that is controllable via a magnetic valve assembly in traction control operation; to control a brake pressure in the brake system, both pistons act via a pressure rod upon the brake piston of a master brake cylinder. For the sake of a short structural length of the brake booster, the additional piston is embodied as an annular piston, which coaxially surrounds the pressure rod and is sealed off from it, and which rests on a radially protruding driver element of the pressure rod in order to displace it.

Abstract: A brake system with traction control, having a master brake cylinder for at least one brake circuit and having a brake booster is proposed. By operation of a pump, servo pressure is fed into the brake booster via a pressure connection provided on the brake booster, and the servo pressure reaches a pressure reservoir through a bore provided on the brake booster. From there, given a corresponding open passage position of magnetic valves, the servo pressure, via a supply line, reaches the pressure cylinder present in the brake booster, and in the pressure cylinder there is a valve slide that, via a servo piston, actuates a pressure rod leading to the master brake cylinder.

Abstract: The invention is directed to a connection that can be easily made, produced at little expense, and can carry heavy loads. A housing block has a receiving bore with undercut portions, embodied by a groove, that extend over circumferential regions of this bore. A magnet valve has primary flange segments formed onto the valve body, which along their end face which face toward the opening of the receiving bore of the housing block are conically limited in cross section. These flange segments which extend over circumferential regions of the magnet valve body engage the undercut portions, formed in accordance with the cross section of the flange segments, in the manner of a bayonet mount type of connection. The connection is particularly suitable for use in hydraulic vehicle brake systems, where particularly strong forces between the magnet valve and the housing block must be absorbed.

Abstract: A brake system having a master brake cylinder embodied as an electrohydraulic followup booster, this cylinder communicates with a brake pedal via a piston rod. The piston rod acts upon a master cylinder piston, which in turn puts a brake chamber under brake pressure. As a result, brake fluid flows via brake lines to various wheel brake cylinders. The master cylinder piston is also assigned a servo piston chamber, which communicates via a control element with a device for supplying servo brake fluid. This control element is controlled via a travel transducer that detects the motion of the piston rod. Additionally, however, the master cylinder piston is assigned a travel transducer which independently of the motion of the piston rod detects the actual motion of the master cylinder piston, and by way of which the control element is likewise triggered for the servo brake fluid, via an electronic unit.

Abstract: A brake system including an apparatus for limiting drive slip at drivable vehicle wheels by feeding brake pressure into wheel brakes associated with these vehicle wheels. The brake pressure is generated in a pressure modulator having a spring-loaded stepped piston including a primary piston. The primary piston can be acted upon by pressure fuid from a supply container by a motor which drives a pump. A secondary piston of the stepped piston effects the brake pressure and feeds it via a valve assembly into a brake line extending between the master brake cylinder of the brake system and a wheel brake. The brake pressure can be diminished by controlling the drive motor of the pump. The pump is embodied with reversible pumping directions, and the pressure fluid flows through it both during a working stroke and a return stroke of the stepped piston. The valve assembly is actuatable by the stepped piston as a function of the position thereof.

Abstract: The vehicle brake system has a master brake cylinder to generate brake pressure in at least one wheel brake. To avoid wheel locking during braking, a pressure control valve assembly and a pump for drawing pressure fluid out of the wheel brake are disposed between the master brake cylinder and the wheel brake. With its outlet, the pump communicates with the master brake cylinder via a damper chamber and a throttle having a pressure limiting valve disposed to bypass the throttle. The throttle and the pressure limiting valve have a common sleevelike housing, in which a cylindrically embodiment closing element is guided longitudinally movably. This closing element has a hollow collar on its face end that in the closing position fits over an inflow opening for pressure fluid. The collar of the closing element, in order to form the throttle, is provided with at least one aperture open toward this face end.

Abstract: The brake system has at least one valve assembly, disposed between a master brake cylinder and at least one wheel for controlling the brake pressure during anti-skid operation. A pump is also provided for pumping pressure fluid, withdrawn from the wheel brake during a pressure reduction phase, to the master brake cylinder. A valve assembly comprising two parallel-connected 2/2-way valves is provided between the master brake cylinder and the pressure control valve assembly. During anti-skid operation, the first 2/2-way valve can be switched into a position (b) that throttles the flow of pressure fluid both from the pump to the master brake cylinder and from the master brake cylinder to the wheel brake. As a result, pulsations at the brake pedal of the master brake cylinder are largely avoided.

Abstract: The invention relates to an apparatus for pressure regulation in hydraulic systems, in particular in anti-skid systems of vehicle brake systems. According to the invention, a throttle switchover valve that includes a bypass valve and a throttle assembly is disposed in the brake circuit between a damper chamber and the master cylinder. The throttle switchover valve either creates an unhindered passage for the brake fluid or throttles it, depending on the intensity of the brake pressure. This suppresses pulsations transmitted to the foot pedal, yet nevertheless, rapid braking and fast release of the brake of a motor vehicle are assured.

Abstract: A brake system having a master brake cylinder embodied as an electrohydraulic booster, this cylinder communicates via a piston rod with a brake pedal. The piston rod acts upon at least one master cylinder piston, via which in turn a brake chamber can be put at brake pressure. As a result, brake fluid flows via brake lines to corresponding wheel brake cylinders. Also associated with the master cylinder piston is a servo piston chamber, which communicates via a control element with an apparatus for supplying power brake fluid. This control element is controlled via a controller. The controller controls the control deviation, which is derived from a set-point value forced by a piston rod travel transducer having a following control unit, and from the actual value, which originates in a travel transducer of the master cylinder piston.

Abstract: The invention relates to a brake device for a hydraulic vehicle brake system. In this device, a return feed pump located in a feed pump housing is supported at several points between an assembly housing and a fastening plate and is movable relative to the other components. The mounting is done by screws resting in bearing tubes, the screws being surrounded by elastic damping sleeves in order to enable the elastic mobility of the feed pump housing. The line connections between the feed pump housing and the assembly housing are made by small connecting tubes resting in housing bores in the feed pump housing on one side and in the assembly housing on the other. The through bore extending through the feed pump housing in this region is sealed off on the side of the feed pump housing opposite the small connecting tubes by bolts, which with their part remote from the feed pump housing rest on the fastening plate.

Abstract: In a brake booster, a master brake cylinder is connected to a brake pedal via a piston rod, which acts upon a master cylinder piston by way of which at least one brake chamber can be put at brake pressure. In this way, servo fluid flows via brake lines to corresponding wheel brake cylinder is a servo chamber, which via a control element communicates with a device for supplying servo fluid to the servo chamber. This control element is controlled via a travel transducer that detects the motion of the piston rod. A lever arrangement is also connected to the piston rod, and on its other end is operatively connected to the travel transducer, which triggers the control element via an electronic unit to maintain the servo pressure.

Abstract: A brake booster which includes a control slide that is displaceably supported in a servo piston and acted upon by a piston rod under the influence of brake pressure. The control slide has bores that establish communication between a pressure chamber and a pressure source or return for power brake fluid in the pressure chamber. The control slide is intended to penetrate a control bush in a stepped bore in the servo piston, which has a radial bore for connecting the pressure source with a radial bore in the control slide toward the pressure chamber. The control bush is supported radially movably in the stepped bore.

Abstract: A brake booster in a housing, having a servo piston slidably supported in the housing and having a piston rod protruding into the housing for transmitting a brake force. In the servo piston, a work chamber is provided for receiving brake fluid drawn after the opening of a valve from a reservoir or supply container and pumped via a pump or the like. The work chamber also communicates via a further valve or the like with a return line to the supply container. To improve valve closing and to shorten the idle travel, the valve preceding the work chamber and arranged for the admission of the brake fluid is embodied by a valve bushing in a blind bore of the servo piston and by a spring-loaded closing element, such as a ball. The valve bushing is disposed between the piston rod and the ball and is traversed by a pin or the like, capable of being acted upon by the piston rod, for lifting the ball from its valve seat.

Abstract: The invention relates to a brake cylinder suitable for a hydraulic vehicle brake system, having at least one brake chamber and a brake booster, actuatable by a piston rod, with a brake valve assembly that has an inlet and an outlet for power brake fluid and communicates with a pressure chamber of the brake booster. The pressure chamber is located in a longitudinally bored housing section and is defined in the axial direction by one end of a sealed and displaceable sheath and of a rod that is sealed and displaceable within the sheath. The sheath and rod form two servo pistons for generating brake pressure in the brake chamber. The rod is displaceable in an emergency by means of the coaxially aligned piston rod. In a space-saving manner, the brake valve assembly is built into the rod and piston rod.

Abstract: A feed pump, preferably for anti-skid brake systems, having at least one shaft-driven pump piston and at least one compensation element. Some of the brake fluid fed by the pump piston into the brake system during the compression stroke is received in a compensation chamber of the compensation element. During the ensuing intake stroke of the pump piston, an eccentric shaft that also actuates the pump piston actuates a compensation piston of the compensation element, in order to feed the brake fluid that has been temporarily stored in the compensation chamber into the brake system.

Abstract: A brake booster in which a servo piston is slidably supported in a housing. The transmission of a brake force is effected via a piston rod protruding into the housing, and a work chamber is formed between the piston rod and the servo piston. After the opening of a valve, this work chamber can be filled with brake fluid from a reservoir or supply container via a pump or the like. A return line also leads out of the work chamber back to the supply container, via a further valve. To improve the closing or sealing behavior of the valves, the first valve is to be embodied for admitting the brake fluid from a valve cone, or its shoulder, the valve cone extending axially in a blind bore of the servo piston, and a valve seat formed out of a valve bushing. The second valve is likewise embodied as a seat valve, and an element connected with the valve cone cooperates with an element connected with the piston rod.

Abstract: An anti-skid control system including a return feed device disposed between a self-priming pressure fluid pump and a multi-circuit master includes a first valve assembly associated with the wheel brake cylinder, a control valve assembly that communicates with the self-priming pressure fluid pump is connected to the feed device embodied as a piston pump, which in one displacement direction can be connected to at least one wheel brake cylinder by a first valve assembly, and in another displacement direction can be connected to at least one brake circuit chamber of a multi-circuit master cylinder.

Abstract: A brake booster having a brake valve disposed inside a booster piston, the brake valve comprises a valve bushing including a valve seat and a slide that is pressed by a spring against the valve seat of the valve bushing. The slide is supported with play at a great distance from the valve seat, so that it can be pivoted slightly around the vicinity of its bearing. The pivotability of the slide facilitates its centering in the valve seat, so that the valve closes dependably even in the presence of bearing tolerances or valve seat tolerances. Seals required for sealing off the slide have an elastic behavior, and are disposed in the vicinity of the bearing. As a result, reliable sealing is assured despite the pivotability of the slide.