Abstract: A hydraulic twin-pipe shock absorber for horizontal use and which is particularly suitable for use with rail vehicles. The shock absorber includes a cylindrical housing with a fluid-filled working cylinder provided inside the housing. A piston is displaceable in the working cylinder and is connected to a clearance between the housing and the working cylinder. The construction of the shock absorber removes air and foam from the working cylinder so that pressure builds up evenly and uniformly.

Abstract: A fuel injection pump volatiling fuel which has an inlet opening to a pump chamber, an impeller in the pump chamber and a side channel, at whose end an outlet opening is provided. The outlet opening is separated from the beginning of the side channel by a sealing surface having a vent hole. To improve the supply properties of fuel with higher temperature the outlet opening has two areas extending across finite angles which are adjacent to each other in the circumferential direction. The areas have radially differing widths and extend farther into the sealing surface with the narrower area externally than internally. The supply quantity of fuel with a higher temperature is accordingly increased.

Abstract: The present invention starts from a vehicle hydraulic brake system comprising a master cylinder (2) actuatable by a hydraulic power booster (1) and containing a working chamber (12, 21), to which latter wheel brakes (36, 37, 38, 39) are connected by way of valves (40, 41) controllable by a slip control electronics. On control action, pressure fluid can be taken from the wheel brakes (36, 37, 38, 39) through the valves (40, 41) and can be replenished out of the presser chamber (5) of the hydraulic power booster (1) by way of the working chamber of the hydraulic power booster by way of the working chamber (12, 21). On communication of the working chamber (12, 21) with the pressure chamber (5) of the hydraulic power booster (1), simultaneously, a resetting sleeve (11) is pressurized in the brake's release direction which is penetrated by a master cylinder piston (10) and which serves to limit the stroke of the brake pedal (6).

Abstract: A hydraulic brake system with slip control for automotive vehicles, comprises a master cylinder (2) pressurizable by a hydraulic power booster (1), in which system valve members (39, 40, 43, 44, 47) are inserted between the master cylinder (2) and the wheel brakes (45, 46, 41, 42) connected thereto which serve to remove pressure fluid from the wheel brakes (41, 42, 45, 46). Pressure fluid taken from the wheel brakes (41, 42, 45, 46) is replenished out of the pressure chamber (6) of the hydraulic power booster (1). A stroke limitation of the brake pedal (7) is effected during slip control.

Abstract: A vehicle hydraulic brake system with slip control, wherein a master cylinder (2) is pressurizable by a hydraulic poser booster (1). Valve means (23, 24, 29, 28, 32, 33, 34, 35) are inserted between the master cylinder (2) and the wheel brakes (25, 26, 30, 31) connected to the master cylinder (2), which valve means serve to remove pressure fluid from the wheel brakes (30, 31, 25, 26). Pressure fluid taken from the wheel brakes is replenished out of the pressure chamber (10) of the hydraulic power booster (1). A stroke limitation of the brake pedal (8) is effected during slip control. To simplify the design of the braking pressure generator (1, 2), the end surface of the master cylinder piston (5) close to the working chamber (16) is larger than the effective surface of the booster piston (4), and that a stepped piston is employed as master cylinder piston (5), an annular surface of said master cylinder piston (5) being adapted to be acted upon by the pressure prevailing in the working chamber (16).

Abstract: A slip-controlled brake system, wherein the brake pedal effort is transmitted power-assisted to a master cylinder (10) to the wheel cylinders through several hydraulic fluid paths which allow shut off independently of one another. The behavior of rotation of the wheels and the vehicle speed are measured by sensors (S1 to S4), with the signals logically linked and control signals generated from them for electromagnetically actuatable directional control valves (15, 16, 17). In the event of a control action, the power assisted pedal effort (F) directed on the master cylinder (10) is temporarily compensated by an external power action in an opposite direction whereby the pressure increase in the master cylinder (10) is slowed down or decreased.

Abstract: A spreading spring for a floating-caliper or a fist-type caliper spot-type disc brake for automotive vehicles, comprising a spreading spring portion (30) which extends substantially in axial direction and forms two legs (34,36), the end portions of the legs (34,36) abutting on backing portions of brake pads (16,18). A resilient bracket (28) connected thereto extends substantially in circumferential direction and forms two legs (54,56) with the ends of the resilient bracket being supported on retaining pins (22,24).

Abstract: A braking pressure control unit comprises a valve assembly with a valve seat (25) formed fast with the housing and a closure member (26) which latter, with the brake circuits (I, II) intact, when performing its relative movement to the valve seat (25), is kept in abutment on an extension (II) of a stepped piston (6) by a closure spring (28) supported on a malfunction piston (7). The valve (25, 26) is prevented from closing by the extension (11) at the stepped piston (6) and by a stop (29) for the closure member (26) at the malfunction piston (7). Because of the closure member (26) being in constant abutment on the extension (11) of the stepped piston (6) during its relative movement, there results a smaller stroke of the malfunction piston (7) and thus less fluid input of the braking pressure control unit and less wear of the sealing elements (22, 23) at the malfunction piston (7).

Abstract: For the control of a brake unit for automotive vehicles, electric signals are generated dependent on the operation of the brake pedal. The signals are processed in an electronic circuit (8) and logically linked to sensor signals containing information on the brake power, the braking effect and/or on the rotational behavior of the individual wheels. Electrically actuatable wheel brakes (1, 2, 3, 4, 32, 33) equipped with an electric drive (M) are controlled by the generated signals. Through a second brake system, brake power is transmitted by the brake pedal (5, 5') either simultaneously or upon overcoming a threshold value to the wheels of one axle, preferably to the front wheels, i.e. front right, front left wheels (VR, VL), the brake power becoming, however, effective exclusively in the event of a fault or a failure of the electrical brake system or of the electric power supply.

Abstract: A slip-controlled brake system for motor vehicles is provided with at least one static brake circuit (17, 18) into which, in the event of control, pressure medium can be fed from a dynamic pressure medium circuit through a control valve. The system comprises a brake pressure generator (1) including a master cylinder arrangement (12) and a positioning sleeve (33) maintaining the master cylinder piston or pistons (42, 43) in a defined position during the dynamically controlled inflow of pressue medium. The brake system is furnished with a monitoring means (39, 40, WU) to detect the path and the relative position of the positioning sleeve (33), respectively, in the master cylinder arrangement (12) and to evaluate the same as a signal indicative of the proper operation of the brake system. The path sensor (39) detecting the position of the positioning sleeve (33) is capable to mechanically or electrically open a contact (39) feasibly closed in the resting position to thereby release a signal.

Abstract: A hydraulic brake system for automotive vehicles with a master brake cylinder (51) and with a hydraulic power booster (49) connected upstream of the master brake cylinder, in which a pressure medium pump (18) which may be driven by an electric motor (17) is used for providing an auxiliary hydraulic energy, the drive of which may be switched on by a pressure accumulator (1), on the one hand, and by a brake pedal contact (58), on the other hand, in the unbraked operation of the automotive vehicle the pressure accumulator (1) permanently being kept on a pressure level sufficient for an initial actuation of the brake and the charge of the pressure accumulator (1) being monitored by a pressure control valve (19).

Abstract: A brake system provided for automotive vehicles comprises a braking pressure generator (3) and a braking pressure modulator (4) which is arranged in the pressure medium conduit leading to the rear wheel brakes (16, 17) and which allows to vary the apportioning of the braking pressure to the wheel brakes of the front and the rear axle to achieve approximation to an ideal brake force distribution in dependence on the instantaneous axle load. The braking pressure modulator (4) contains valve assemblies (5) serving to supply braking pressure alternately to the wheel brakes (16, 17) of the right and the left rear wheel in such a manner that one of the two rear wheels (HR or HL) furnishes the predominant portion of the brake force allotted to the rear axle. The pressure delivery alternates to connect to the other rear wheel on each braking operation or on each brake actuation or according to predetermined time criteria.

Abstract: A slip-controlled brake system for road vehicles in which one front wheel (VR, VL) and one rear wheel (HR, HL) at a time are connected to a common braking pressure control channel wherein the braking pressure variation in the two braking pressure control channels is influenced in dependence on predetermined selection criteria such as "select-low" and "select-high" criteria. A cornering identification circuit (20') is provided which adds up the slip values (S.sub.VL, S.sub.HL, S.sub.VR, S.sub.HR) of the two wheels of one side of the vehicle and compares them with the slip value sum (S.sub.L, S.sub.R) of the wheels of the other side of the vehicle. When the difference of the slip value sums of the two sides of the vehicle exceeds a limit value, the selection criteria and, hence, the braking pressure variations are temporarily changed. Because of the cornering identification circuit, it is possible to generate information about the driving direction, i.e.

Abstract: A hydraulic motor vehicle servo brake comprises a pedal-actuated master cylinder (11) with at least one master piston (24). In addition, a brake valve (17) is provided for boosting of the brake force, which brake valve upon actuation by the brake pedal (16) feeds pressure medium supplied by a hydraulic pump (18) connected to a supply reservoir (27) in a controlled way to the master piston (24). Furthermore, a pressure accumulator (45) is provided which is maintained in loaded condition by the pump (18) and is of such capacity as to ensure that it supplies sufficient pressure during the running-up phase of the pump (18) after the motor (147) is started. A control valve (46) connected to the pressure side of the pump (18) comprises a closing member 47 which normally closes a passage to a return conduit (48) leading to the supply reservoir and is pressurized by the pressure of the pump (18) against the force of a closing member spring (49).

Abstract: A device for monitoring the circumferential speed of a toothed disc (1) capable of being rotated, with a sensor (4) arranged at a defined distance (s) from the toothed rim (2) of the toothed disc (1) and with a sensor casing (7) supported at and securable to a stationay guide member. In order to avoid the need of any additional adjustment of the distance (s) in the event of remounting the sensor (4), a bushing (9) is provided as a guide member which is adapted to be fastened to a carrier element (14) by screw means and which projects into a bore (8) of the casing (7). To arrange a threaded bore (15) in the casing (7), the bore (15) is adapted to accommodate a screw (16) into contact with the bushing (9).

Abstract: A brake system wherein the piston (2) of a master cylinder (1) is actuated by the pressure controlled by a brake valve (6), a monitoring device is provided for detection of fail conditions. The monitoring device comprises a switch (18) which is closed by a trip cam (17) upon an actuating distance (s.sub.1) having been traveled by the actuating element (4), and further switches (20, 21), the switch (20) being closed after an actuating travel distance (s.sub.21) and the switch (21) being closed after an actuating travel distance (s.sub.22), each by a trip cam (19) at the master cylinder piston (2). If the master cylinder piston (2) has not yet traveled the actuating distance (s.sub.21) or has already traveled furher than the distance (s.sub.22) when the switch (18) closes, an evaluating circuit (22) which evaluates the positions of the switches (18, 20, 21) will switch on a signal lamp (23) to indicate a fail condition in the brake system.

Abstract: A double-cylinder shock absorber, which is particularly suitable for use in a MacPherson strut, includes an inner cylinder having a closed lower end and which is filled with oil. A piston rod extends into the inner cylinder through the upper end thereof. A piston is secured to the lower end of the piston rod and divides the cylinder into upper and lower oil chambers. The piston is provided with a fluid metering device providing a damping force mechanism. A rod guide head closes the upper end of the inner cylinder and is provided with an opening which is slightly spaced from the piston rod to form an annular clearance therebetween. An outer cylinder is coaxially disposed around the inner cylinder and forms therewith an annular reservoir chamber having closed upper and lower ends. The lower portion of the reservoir chamber is filled with oil and the upper portion is filled with gas.

Abstract: A slide switch comprising fixed contacts and a contact bridge which, by displacing a slider provided with cams, can be tilted so that one of its ends comes in touch with a further fixed contact. The contact bridge is firmly connected by being welded thereto. This results in a reliable center contact which avoids chatter and phenomena of wear.

Abstract: A brake pressure generator for an automotive hydraulic brake system, wherein a booster piston (13) which is displaceable by an auxiliary hydraulic pressure in the direction of actuation is adapted to mechanically strike an annular piston (18) and is displaceable in the actuating direction. Sealingly guided within the annular piston (18) is a master cylinder piston (25) confining at least one working chamber (23) separable from an unpressurized supply reservoir (32), by a valve (31) controllable in way-responsive manner. Annular piston (18) is of a stepped-piston configuration and is provided with a section (19) facing pedal actuation (6) and being of a smaller diameter. According to the invention it is suggested that the pedal-sided section (19) of annular piston (18) is of a smaller diameter than that of the booster piston (13) to confine an annular chamber (22) which via a check valve (33) adapted to be switched open toward working chamber (23), is in communication with working chamber (23).

Abstract: A protective cap (11) for a bolt guide of a spot-type disc brake, comprises an elastic (pleated) bellows, one end portion of which is fastened to the periphery of a first cylindrical part, while the other end portion thereof is secured to the periphery of a second cylindrical part. A rigid reinforcing and retaining member (15, 16) is provided on each one of said end portions (12, 13) with both reinforcing and retaining members being arranged with at least part of their radial extension on the same radius. To avoid damage to the cylindrical part and the guide surface thereof, at least one (16) of the reinforcing and retaining members is secured radially outwards at the corresponding end portion of the elastic bellows. Thus, an axially extending annular surface is formed which is free from the material of the elastic bellows and wherein the reinforcing and retaining members (16) together with this annular surface is arranged in press fit in a corresponding bore (20) of the associated cylindrical part.