Robert Boschgmbh

Ernst-Dieter Schaefer

Guenter Krenz

Norbert Alaze

Wolfgang Schuller

Klaus Mueller

Heinz Siegel

Gerhard Wetzel

Edgar Schmitt

Guenther Schnalzger

Peter Lang

Friedrich Megerle

Eberhardt Schunck

Manfred Hauser

Michael Hellebrandt

Dieter Merklein

Ursula Eckstein

Steffen Schneider

Jochen Braun

Erwin Sinnl

Frank Schumann

Ralf Zitzelsberger

Peter Zimmermann

Thomas Butz

Gerd A Baur

Michael Klose

Manfred Dreyer

Andreas Kaessmann

Dirk Merbold

Christian Doberschuetz

Christian Debusmann

Hans-Heinz Kauschke

Timo Zundel

Guy-Edward Michalski

Marcus Egle

Ralf Breit

Marcel Munoz Greschuchna

A piston pump for brake systems employs a pulsation-smoothing device that functions especially well in the region of the outlet valve. As a result, substantially less noise occurs, and the durability of the piston pump is substantially better. The piston pump is used essentially in traction-controlled motor vehicle brake systems.

Piston pump

A pressure accumulator has a housing having at least one pressure medium opening, a diaphragm chamber arranged inside the housing and having a side wall which is at least partially deformable, and a pressure medium chamber arranged outside of the diaphragm chamber, the pressure medium chamber at least partially being limited by a partially permeable material which allows an exit of gas from the pressure medium chamber but prevents an exit of a pressure medium from the pressure medium chamber.

Pressure accumulator, and method for producing the same

A method of employing a hydraulic unit of a brake system containing brake lines extending between a master cylinder and wheel brakes and valves which are actuatable by exertion of magnetic force and which have removable electrical coils and when unactuated assume their blocking position, including the steps of removing coils from the valves; connecting the hydraulic unit, toward the master cylinder or the wheel brakes, to an air source of adequately high pressure; switching the valves to their open position by the exertion of magnetic force of a permanent magnet; positively displacing the pressure medium contained in the hydraulic unit from the air source by air and caught.

Method for emptying the pressure medium from a hydraulic unit of a hydraulic brake system of motor vehicles

A pump assembly having a piston pump, which is driven by an eccentric element. To prevent leakage brake fluid from reaching an eccentric element chamber, a groove surrounds the pump piston in the pump housing and a seal and a porous metal sintered ring is inserted into the groove. A drain which extends obliquely downwardly from the groove drains leakage fluid from the sintered ring.

Pump assembly for a slip-controlled hydraulic brake system for a vehicle

A motor-and-pump unit having an electric motor in combination with a housing of the pump. The pump has at least one displaceable pump piston. To that end, on the side toward the pump housing and originating at one end wall, the electric motor has a bearing neck, which is tubular and into which the pump housing protrudes. This bearing neck fixes an outer ball bearing race of a ball bearing for a shaft of the electric motor. Protruding from the ball bearing is a shaft end that carries an eccentric element for moving the at least one pump piston. The eccentric element is disposed at an axial spacing from an inner ball bearing race that surrounds the shaft in stationary fashion. The eccentric element is brought directly up to the inner ball bearing race, and the inner ball bearing race and the eccentric element are embodied as a one-piece, multifunctional component. This one-piece construction offers the advantage that both the inner ball bearing race and the eccentric element firmly surround the end of the shaft like a reinforcing sleeve and thus reinforce this shaft end. Furthermore, bringing the eccentric element close to the ball bearing reduces the bending moment that tends to cause warping.

Motor-and-pump unit for a vehicle hydraulic brake system

A piston pump, which is provided as a return feed pump for a slip-regulated motor vehicle brake system. In order to simplify the manufacture, a sleeve in the form of a tubular piece is clamped between a fastening element which is inserted into the cylinder bore using a self-clinching technique, and the cylinder bore, and is thus sealed and fixed in place. In addition to the simple manufacture of the sleeve out of reasonably priced tubular material, the piston pump has the advantage of a sealing of the sleeve in the cylinder bore without a separate sealing element such as a sealing ring.

The invention relates to a piston pump with a piston received axially displaceably in a pump bore. To improve the aspiration performance of the piston pump. A cuff with a U-shaped annular cross section is provided, the cuff is inserted into the pump bore surrounding the piston, an outer lip forms a diaphragm, which rests against a wall of the pump bore and is acted upon on its outside with ambient pressure through a venting bore. The cuff is part of a fluid storage element, which makes an additional fluid volume available to the piston pump. The diaphragm acted upon by ambient pressure creates a pumping effect, if a fluid pressure in the fluid storage element drops below ambient pressure in an intake stroke of the piston.

Hydraulic braking system for road vehicles, in particular passenger cars

Reciprocating piston pump with radial cylinders based by a wire hoop

The present invention relates to an eccentric arrangement for a reciprocating piston pump, having a drive shaft drivable by a drive device, an eccentric part of a rubber-elastically deformable material is disposed on the drive shaft in a manner fixed against relative rotation. A bearing ring is provided on an outer circumferential surface of the eccentric part, by which ring a reciprocating piston is displaceable driven substantially perpendicular to the drive shaft. To avoid stroke losses, first and second support faces are provided on the drive shaft which the eccentric part disposed between them in such a way that the eccentric part rests with its axial ends on the first and second support faces.

Eccentric arrangement for a reciprocating piston pump

The invention relates to a damper for a slip-controlled brake system of a vehicle. An elastic damper body is disposed in a damper chamber cut as a bore into a hydraulic housing block of the vehicle brake system. The elastic damper body includes an encompassing sealing edge that partitions the damper chamber into a chamber that can be acted upon by fluid and a residual volume. During pressurization, this damper body is elastically compressed or expanded. The advantages of the damper of the invention are a simple design, good damping properties and its ability to avoid the formation of cracks in its damper body.

Damper for damping pressure fluctuations in brake fluid of hydraulic

An oscillation damper that has a cup-shaped elastomer diaphragm body, with a bottom diaphragm. The diaphragm body is received tightly on an opening side in a bore of a housing, and fits around a protrusion of a closure body that closes the bore. Between the closure body and the diaphragm, a support body having an end face that is concave toward the diaphragm is received in the diaphragm body. A void formed between the diaphragm and the support body communicates with the atmosphere, through a conduit embodied on the support body and through an opening in the closure body. The oscillation damper can be used in hydraulic slip-controlled motor vehicle brake systems.

Damper for damping fluid oscillations in a hydraulic, slip-controlled

A pressure limiting valve has a valve closing member (ball), which is subjected to a hydraulic opening force and is indirectly subjected to a closing force generated by a compression spring which avoids hysteresis that impairs the switching behavior of the pressure limiting valve. A tappet, which passes through a sealing ring and is exposed to a control pressure, is also capable of acting in a closing manner upon the pressure limiting valve. When there is no operative control pressure, the tappet is pushed back by the opening of the pressure limiting valve and is retained in this position by frictional forces brought about by a sealing ring. The switching plays of the pressure limiting valve are free of frictional forces. The pressure limiting valve is suitable for use in hydraulic motor vehicle brake systems.

Pressure limiting valve with uncoupled valve closing body and tappet

A hydraulic system having a pressure generator which is protected against destructive overload. The hydraulic system has a pulsating feeding pressure generator, such as a piston pump, which feeds pressure fluid at high pressure into a damper chamber of a housing. A throttle body having a throttle bore is disposed on the outlet side of the damper chamber. For producing the protective effect, the damper chamber is preceded by a rupture disk communicating with the outlet. The throttle body suitably has a thin-walled portion, embodied as a rupture disk, in which the throttle bore is located. The embodiment described is advantageously usable in hydraulic systems in which pressure fluids are pulsatingly fed at high pressures.

Hydraulic system for a motor vehicle brake system having a pump with

A pressure fluid reservoir is made from two housing components, that are brought together with an outer and inner thread arrangement with end stops formed by adjacent ends of the two housing components. The first housing component of the pressure fluid reservoir includes two segments and the second housing component includes two guide faces with an inner thread and an outer thread located between them. The guide faces are disposed with such a length and such a spacing with respect to one another that prior to the threads being screwed together during assembly, the threads are sealed off from the reservoir chambers and two stop faces facing one another on the housing components come into contact on their ends once the screwing operation is completed. The ends are exposed to the outside so that the contact between the ends can be seen from the outside.

Growing community of inventors

Brackenheim, Germany

Ernst-Dieter Schaefer