Abstract: A circuit configuration for an electronic controller has a monitoring circuit which, upon detecting a defective condition, malfunction or defective power supply, maintains the actuator elements of the controller in their initial positions or restores the actuator elements of the controller to their initial positions. These actuator elements can be, for example, the magnetic valves of an antilocking brake system. The monitoring circuit checks, before excitation of a power supply relay, the connection of the relay to the power supply, the blocking condition of a switching transistor, through which the power supply relay (Rel) is activated, and the separating position of the power supply contact of the power supply relay. Moreover, the monitoring circuit responds to overvoltages.

Abstract: A retaining system for passengers of an automotive vehicle in which an impact element, which is movable toward the part of the body to be retained in case of a crash, is fixed to the vehicle in front of the passenger of the vehicle and is moved into position to block the space in front of the seat on which the passenger is seated only in a crash situation. This retaining system is intended to prevent the so-called "submerging" effect, by which a passenger slides into the space in front of the seat upon which the passenger is seated in a crash situation. The retaining system includes an impact element which is swingable toward the passenger about an axis which extends transversely to the longitudinal axis of the vehicle. If the interior design of the vehicle requires, the impact element can be arranged to undergo translatory movement in the direction of the passenger in addition to the swinging movement.

Abstract: An improved spring energy accumulators are used to actuate brake units mounted to either end of a transmission for a track laying vehicle drive train. The housing of the spring energy accumulator is directly mounted to the housing of the brake unit. The spring energy accumulators are designed to allow installation and removal of hydraulic components contained in an insert cylinder without disturbing a spring mounted highly compressed within the housing.

Abstract: The invention relates to a load-sensitive twin brake power controller whose change-over pressure is determined by a lever through a rocking element. The housing is extruded. Traditionally, a large-volume cylindrical chamber for the accommodation of the rocking element and a circular dust cover seat are mill cut into the housing. Such a loss of material is avoided by the present invention in that in conjunction with the extruded profile section two housing projections are molded which are each provided with one groove. Between the latter the dust cover is pressed with a sheet metal ring against the housing until the sheet metal ring comes to be locked in the grooves.

Abstract: In a spot-type disc brake assembly with an electric friction lining warning device and a bleeder screw, a warning contact plug is supported at the brake caliper by using a holder. The holder is fixedly attached to the bleeder screw and has tongues that abut against the brake caliper. The tongues are a safeguard against the holder rotating relative to the caliper and position the warning contact plug on the brake.

Abstract: The present invention relates to a hydraulic assembly for motor vehicle brake systems with slip control which includes at least a valve arrangement (4), a pressure accumulator system (2, 3) and an auxiliary pressure pump. In order to provide a hydraulic assembly which is as operatively safe as possible and has the greatest possible compactness, a central housing (1) shaped as an assembly carrier is provided which accommodates at least the pump pistons of the auxiliary pressure pump with the drive motor as well as the accumulator pistons of the accumulator system and the valve arrangement.

Abstract: In a duo-servo drum brake comprising a mechanical expander adjacent a thrust bearing for supporting the brake shoes, with the expander including an operating lever to which is transmitted the operating force of an actuator substantially in a direction tangential to the edge of the brake drum. The brake shoe is movable through an expander in the direction of the operating force and connected to a thrust bearing through a prestressed spring. The spring force of the prestressed spring opposes the expanding force of the expander and exceeds the operating force required for placing the brake shoes in abutment with the brake drum on the operating lever.

Abstract: A two-tube shock absorber for automotive vehicles is furnished with a shock absorber piston and an electromagnetically actuatable unidirectional shock absorber valve to adjust a "smooth" characteristic which is desired for enhancing driving comfort. The shock absorber valve is alternatively configurated in the shape of a single-stage, or a two-stage slide valve. The position of the slide depends on the hydraulic pressure differential which decreases above the shock absorber valve, the volumetric stream which flows through the shock absorber valve, and the actuating current of the electromagnetic actuating unit. The inventive shock absorber allows the selection of a special characteristic curve out of a family of potential characteristic curves. Simultaneously, the sensitivity of the shock absorber to errors of the electromagnetic actuation is eliminated.

Abstract: A brake pressure control apparatus having a brake pressure master unit, a brake connected to the brake pressure master unit through a pressure line, a pressure-controlled inlet valve which is positioned in the pressure line and through which the brake pressure master unit is connected, in a first switching position, through a restrictor orifice to the brake and which is furnished with a control piston which in one direction is subject to the pressure in the pressure line and in the opposite direction is subject to the action of a spring and of the pressure in a return line which contains an outlet valve which is controllable by a control device, which blocks the return line in its position of rest and which releases the return line in its switching position.

Abstract: This invention relates to a solenoid valve where a volume governor which governs the hydraulic flow is inserted coaxially to the valve closure member into the valve accommodating body of the valve. The volume governor is integrated by way of series connection between the first pressure medium connection, emanating from a pressure medium source, and the valve closure member. A reduction of the valve operating noises is ensured with a smallest-requirement-answering structural size, thus the control noises being prevented from propagating over the entire connected system.

Abstract: A controllable hydraulic vibration absorber is disclosed whose power cylinder and a tube defines a connecting duct which affords a balance of volume between both power chambers of the vibration absorber and a balancing chamber which is formed between the tube and an external tube disposed coaxially with it. The controllable vibration absorber valve affords variations of the vibration absorbing power and allows a flow through it in one direction only and is arranged between the connecting duct and the balancing chamber so as to be integrated as to its action in a valve assembly which is constituted by a non-return valve and by a switching valve. The switching valve is inserted between the second power chamber and the connecting duct.

Abstract: The invention is concerned with a slip-controlled brake system, adapted for use in automotive vehicles, provided with a master cylinder connected to wheel brakes through main pressure conduits. The brake system is made up of hydraulic auxiliary pressure pumps, wheel sensors and electronic circuits for determining the wheel rotation pattern and for generating electrical brake pressure control signals which control electromagnetically actuable pressure fluid inlet and outlet valves provided in the pressure fluid conduits for slip control purposes. At least one volume-displacing pressure pulsation snubber cooperating with the pressure column of the two main pressure conduits is being disposed between the wheel brakes and the appertaining inlet valves of two main pressure conduits.

Abstract: A brake system which can be employed both for brake slip control and for traction slip control, wherein the brake slip control is performed according to the return delivery principle, while an open-loop system is set up during traction slip control. In order to manage with the same pump (10) in both cases, a valve system composed of a first non-return valve (16) and a second non-return valve (17) is provided at the suction side of the pump. The opening pressure of the first non-return valve (16) is greater than that of the second non-return valve (17). Further, the initial pressure of a low-pressure accumulator (9) is in excess of the opening pressure of the first non-return valve (16). The first non-return valve (16) is operative during brake slip control, while the second non-return valve (17) is operative during traction slip control. Switch-over can be effected for instance by the master cylinder pressure via a control line (18).

Abstract: A hydraulic brake system with anti-lock control, in particular for automotive vehicles, comprising a braking pressure generator (18), at least one wheel brake (5), an auxiliary-pressure pump (1), a low-pressure accumulator (22), and a shut-off valve and outlet valve (12, 7) for controlling the braking pressure. The shut-off valve is controlled to permit or prevent pressure fluid flow between the braking pressure generator and the wheel brake by a stepped piston positioned in a stepped bore in a housing. Initially, the stepped-piston maintains the shut-off valve open to permit pressure fluid flow. During slip control operation when pressure fluid from the low-pressure accumulator is delivered to the stepped-bore by the auxiliary-pressure pump, the stepped-piston closes the shut-off valve to prevent pressure fluid flow.

Abstract: An electrohydraulic pressure control device consisting of one or several electromagnetically operable hydraulic valves arranged in a block-shaped manner on a valve accommodating body. In order to provide both a compact and operationally optimized pressure control device which makes manufacture, checking and assembly as easy as possible and where different thermal expansions of the components are to be received possibly without any tensions, this invention provides that the coils (1), flexibly held frictionally and/or positively by an elastic or plastic holding device (4) arranged on the carrier element (2) of the cover (3), are flexibly alignable with respect to the valve accommodating body (5).

Abstract: A brake pressure control apparatus for automotive vehicles with an anti-locking control system is presented. It is comprised of a master cylinder, of one or of a plurality of wheel cylinders for wheel brakes, of a pressure modulator for the modulation of the hydraulic pressure in the wheel cylinders of the wheel brakes during a brake pressure control modus, of at least one motor-driven pump for the generation of a hydraulic pressure, of an electronic controller. The outlet valve associated with a wheel cylinder is furnished with a closing element (5) which is connected to the closing element (6) of the inlet valve through a captivating apparatus which is configurated and positioned in such a manner that in its closing position the said closing element (5) of said outlet valve opens the said closing element (6) of said inlet valve and in its open position it closes said closing element of the inlet valve.

Abstract: A bumper system including an extendable bumper resiliently disposed in the direction of impact. The system is compact and, even at elevated impact speeds, protects the automotive vehicle against damage. The bumper is extended by an adequate amount before or during the situation of danger. A progressive damping characteristic and a suitable drive to quickly extend and to safely return the bumper are provided.

Abstract: A floating-frame spot-type disc brake is described comprising a floating frame (1) guided in a manner axially displaceable on a brake carrier (12), and being furnished with two brake cylinders (2, 3) and two brake pistons (4, 5) directly acting on two axially inwardly disposed brake shoes (6, 7). The brake carrier (12) is located entirely on one side of the brake disc and no portion extends across the outer edge of the brake disc (15), so that the maximum diameter of the brake disc is limited only by the relatively thin sections of the floating frame (1) extending across the outer edge of the brake disc. Additional brake shoes (8, 9, 22), on the axially outer side, are fixed to the floating frame (1), in turn transmitting the circumferential force acting on the outer shoes occurring during braking through a bolt guide (10), into the brake carrier (12).

Abstract: An anti-lock-controlled brake system which, with a minimum number of locking valves between the pressure medium storage reservoir (20) and the wheel brakes (31, 32, 33, 34), is equally suitable for traction slip control with all types of brake circuit allocation. An electromagnetically operated locking valve (27) is provided in the connection line (18) from the pressure medium storage reservoir (20) to the first pressure chamber (8), while the connection through connection line (19) to the second pressure chamber (9) is controlled via the stroke of the floating piston (7) applied by the pressure of the primary brake circuit (I). The pressure build-up required in the primary brake circuit (I) at the beginning of a traction slip control operation is brought about by a pump (26) or the like which either is already provided for brake-slip-dependent braking pressure control or is additionally incorporated in the hydraulic circuitry exclusively for traction slip control.

Abstract: A method of assembling elements into a valve block is described, especially for use with slip-controlled brake systems, a sealing ball, valve covers or valve seats are inserted into the valve block to be sealed without using force fitting swaging or other mechanical working of the parts, to avoid contaminating abrasive particles generated by those processors. The elements are inserted into openings in the valve block housing with a clearance fit, and heated to a temperature higher than the austenite starting temperature causing a memory shape to be restored, which provides a sealing fixation of the elements in respective openings in the valve block.