Continental Teves, Ag and Company Ohg

Itt Automotive Europe Gmbh

Itt Manufacturing Enterprises, Inc.

Alfred Teves Gmbh

Albrecht Otto

Dieter Dinkel

Erhard Beck

Hans-Dieter Reinartz

Helmut Steffes

Axel Hinz

Hans-Georg Zentgraf

Peter Volz

Uwe Greiff

Georg Sonnenschein

Jochen Burgdorf

Dalibor Zaviska

Stephan Risch

Stefan Risch

Joachim B&ouml;ing

Daniel Zuk

Georg Obersteiner

Kristian Tarandek

Daniela Zuk

A supply device for the supply of pressure fluid into at least one vehicle brake or into a pressure fluid accumulator, wherein a piston is movably arranged in an accommodating member, a carrier bears a non-return valve arranged coaxially to the piston for the purpose of ventilating a working chamber into which the piston plunges, and wherein a resetting spring is arranged between the carrier and the piston. A multi-piece cage facilitating inserting the resetting spring into the cage parts, the cage parts comprise a fastener that locks the cage due to relative displacement of the cage parts, and the resetting spring is caged and simultaneously elastically preloaded under the relative displacement of the cage parts.

Supply device

The invention relates to a supply device for the supply of pressure fluid into at least one vehicle brake or into a pressure fluid accumulator, wherein a piston is movably arranged in an accommodating member, a carrier bears a non-return valve arranged coaxially to the piston for the purpose of ventilating a working chamber into which the piston plunges , and wherein a resetting spring is arranged between the carrier and the piston. It is the essence of the invention that a multi-piece cage allows inserting the resetting Spring into the cage parts, the cage parts comprise fastening means that lock the cage due to relative displacement of the cage parts, and the resetting spring is caged and simultaneously elastically preloaded under the relative displacement of the cage parts.

A hydraulic unit for a slip-controlled brake system includes noise damping chambers (), and at least one element which defines a direction of inflow and outflow of the pressure fluid for the throughflow and deviation of the pressure fluid in the noise damping chamber (). In one embodiment, this is accomplished by two inclined channels (). An inclined channel () extends from a lateral surface of the accommodating member () through the wall of the pump bore (), said inclined channel () opening at an acute angle in the area of the bottom of the noise damping chamber (). Likewise, an additional inclined channel () extends from the lateral surface of the accommodating member () at an acute angle through the wall of the noise damping chamber, said inclined channel () opening in the bottom area of a valve accommodating bore () in the first valve row X.

Hydraulic unit

A piston pump () for a hydraulic consumer of an electronically controlled vehicle brake system, carries a stepped piston () and centers a sealing assembly () which is retained in an axial direction Ax by a step () on the stepped piston (), on the one hand, and is retained by a spring cage (), on the other hand. The stepped piston () includes a plane support () for plane support legs () of the spring cage () The stepped piston () includes radially inwards, with respect to the support (), a stepped bore (), with the bore () accommodating centering legs () of the spring cage (). Coaxially as well as inside the stepped bore (), a spring-loaded valve member () of a non-return valve is arranged. A resetting spring () is supported on an abutment () of the bushing () on the one hand and on the spring cage () on the other hand The bushing () is provided with a stop () for the stepped piston (), so that stepped piston (), resetting spring (), non-return valve, and sealing assembly () are arranged within the bushing () as a subassembly that can be handled independently.

Piston pump

In order to produce a compact hydraulic unit for use in an electrohydraulic braking system, the invention discloses that a first accommodating bore for a first feeding device of a pump is passed through between valve accommodating bores of a first and second valve row, and in that second and third accommodating bores for the accommodation of second and third feeding devices of the pump ae passed through between valve accommodating bores; of a third valve row.

Hydraulic unit for anti-slip braking systems

The present invention relates to a hydraulic unit for slip-controlled brake systems which includes a third row of valves in the accommodating member between a first row of valves having the valve-accommodating bores for the inlet valves and the second housing surface wherein the third row of valves includes at least in one valve-accommodating bore an electric change-over valve which is closed in its basic position and hydraulically linked to the pump-accommodating bore by way of a portion of a suction channel that traverses the first row of valves for connection to the pump-accommodating bore.

Hydraulic unit for slip-controlled brake systems

A hydraulic unit whose inlet valves are arranged in valve accommodating bores of a first valve row which is spatially separated by way of a pump accommodating bore from a second valve row accommodating the outlet valves, wherein several valve accommodating bores of a third valve row remote from the pump accommodating bore open directly between the second valve row and the braking pressure generator ports into a first housing surface of the accommodating member, and wherein an electric change-over valve closed in its basic position is provided in at least one valve accommodating bore of the third valve row for the hydraulic communication between at least one braking pressure generator port and a suction-side connection of the pump accommodating bore, the hydraulic communication between said changeover valve and the pump accommodating bore being established by way of a portion of a suction channel, the length thereof being determined by the distance between the pump accommodating bore and the third valve row.

Hydraulic unit for anti-slip regulated braking systems

In a piston pump, in particular for pressure medium delivery in slip-controlled hydraulic brake systems, including a suction valve and a delivery valve, external preassembly and possibilities of external testing of the delivery and suction valves result from providing the suction valve and the delivery valve within a component which can be handled independently. The component preferably includes a delivery valve provided radially to the center line and a valve seat member, with a valve body of the delivery valve being prestressed by a tongue of a clamp, placed onto the valve seat member, against a valve seat formed within the valve seat member.

In a piston pump ( ), in particular for pressure medium delivery in slip-controlled hydraulic brake systems, including a suction valve ( ) and a delivery valve ( ), external preassembly and possibilities of external testing of the delivery and suction valves ( ) result from providing the suction valve ( ) and the delivery valve ( ) within a component ( ) which can be handled independently. The component ( ) preferably includes a delivery valve ( ) provided radially to the center line and a valve seat member ( ), with a valve body ( ) of the delivery valve ( ) being prestressed by a tongue ( ) of a clamp ( ), placed onto the valve seat member ( ), against a valve seat ( ) formed within the valve seat member ( ).

In an electrohydraulic unit for pressure control in brake systems for automotive vehicles which includes mechanical, hydraulic and/or electric structural elements such as control valves, accumulator pistons, pump components and pump drive parts arranged in accommodating bores of a one-part housing, and with parallel accommodating bores for control valves disposed in pairs side by side in two rows in a housing surface, the control valves which are connected to the slave cylinders of one vehicle axle that have a volume requirement lower than the volume requirement of the slave cylinders of the other vehicle axle, and the accommodating bores of these control valves have a smaller diameter and are arranged offset from the middle of the row in the direction of a lateral housing surface.

Electrohydraulic unit for pressure control in brake systems for automotive vehicles

A system for retrofitting a four-valve ABS system for traction slip control. According to the present invention, only the wheel brakes associated with the driven wheels are furnished with outlet valves apart from the prevailing electromagnetically operated inlet valves. A separating valve is additionally inserted into the brake line, and a self-priming return pump is used which additionally has a suction line to the brake line between the master cylinder and the separating valve. Preferably, the suction line is adapted to be closed by a hydraulic valve. The separating valve may also be replaced by a hydraulically operated valve version. The resulting advantage is that at most four additional solenoid valves are required for the entire brake system in order to realize traction slip control.

Hydraulic brake system with anti-skid control

The present invention relates to a hydraulic assembly, which includes a housing and at least one cover closing the housing, wherein a retaining device is mounted on the cover for attachment of the hydraulic assembly to a stationary component.

Securing device for hydraulic assembly

In a pump with a pump housing which includes at least one working chamber and a valve bore connected to the working chamber and wherein an inlet valve and an outlet valve are arranged one behind the other, and with a displacement element that is adapted to reciprocate and, by its movement, varies the volume of the working chamber, the valve sea, the closing element and a valve spring of the inlet valve or the outlet valve which presses the closing element against the valve seat, are interconnected to provide a cartridge which can be installed into the valve bore so as to seal, and the cartridges of both valves are installed from the same side into the valve bore and are supported in the installation direction on the pump housing by a step in the valve bore.

Pump, in particular for an hydraulic wheel-slip brake control system

The present invention relates to a hydraulic brake system which operates by the feedback principle during brake slip control operations and includes a self-priming pump that aspirates pressure fluid from a pressure fluid reservoir for traction slip control operations. In order to improve the delivery rate of the pump, having a parallel arrangement of the two suction valves, a special construction of the pump-assembly is proposed, wherein the two suction valves are integrated in the pump housing. Advantageously, the suction valves are in axially opposed relationship, and the first suction valve is arranged on the movable piston, and the second suction valve is connected with a screw cap. Further, a pump for a slip-controlled hydraulic brake system according to the present invention is suggested having at least one suction valve with a valve seat, a closure member and a valve spring, the preload of the valve spring being variable in response to the position of a delivery piston. A means is provided that is capable of exerting a force on the closure member which counteracts the force exerted by the valve spring during the suction stroke of the delivery piston.

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Schöneck, Germany

Albrecht Otto