Abstract: An arrangement for the switching of devices in motor vehicles, particularly for the changing of switching thresholds in driving or braking control systems or for the limiting of the steering angle of rear axle steering systems, as a function of snow chains that are in place on at least one wheel or the wheels of one axle that are detected by at least one sensor having an amplifier, an evaluating circuit and a threshold value switch that are connected behind it.

Abstract: A propulsion control system for motor vehicles for preventing unstable driving conditions that are caused by a tendency to spin of at least one driven wheel, having a longitudinal acceleration sensor, a vehicle speed sensor and a steering angle sensor, in which case, in an electronic device, a maximum lateral acceleration value assigned to the longitudinal acceleration is determined, and a vehicle speed limit value is formed that is assigned to said lateral acceleration value and to the steering angle, and when said vehicle speed limit value is exceeded an intervention takes place in the sense of a power reduction into the control element of the vehicle engine.

Abstract: A sealing device is provided for sealing the bearing journal area of a rotatable flap within the housing of an air guiding duct which sealing device allows for a reliable sealing, increased rotational mobility of the flap and a saving of material cost and weight. The sealing device is formed with a sealing lip arranged over and extending around approximately half the circumference of a bearing journal creating a front-side sealing surface disposed against the interior wall of a housing. The sealing device is connected to the bearing journals and flap body by the engagement of connecting pieces into holes provided in the flap body and a flange provided on a bearing collar all displaced from the interior wall of the housing.

Abstract: A brake unit for a road vehicle with a hydraulic dual-circuit brake system having two master cylinders, the brake booster and elements for antilock and/or propulsion or slip control in a common housing. A brake booster drive cylinder which can be subjected to the outlet pressure, proportional to the pedal travel, of a brake valve, is arranged between static master cylinders. Coupled to the piston of the drive cylinder is a pivotable rocker, the arms of which are each supported on one of the master cylinder pistons via tappet. Assigned to at least one of the master cylinders is a regulating cylinder having an opposed piston which can be supported on the piston of the master cylinder and which, when subjected on one side to the outlet pressure of the auxiliary pressure source of the brake booster, causes the piston of the master cylinder to be returnable towards its basic position counter to the actuating force exerted on it.

Abstract: The application relates to a front bumper moulding for motor vehicles with an integrated bumper wherein lateral portions of the front bumper moulding are designed so that they can be swung out or extended from a retracted to an extended position, thus providing an unchanged appearance at a retracted position when the vehicle is stopped and at low driving speeds and an especially favorable flow behavior at high vehicle driving speeds, and wherein lateral portion of the front bumper moulding are located in front of the vehicle front wheels and are designed as moveable air spoiler elements.

Abstract: To protect brake fluid against evaporation under extreme braking conditions, the brake fluid contained in the wheel brake cylinders is kept at a minimum pressure between 5 and 10 bar even after completion of a braking operation, thereby increasing the boiling point of the brake fluid. The wheel brake cylinders are designed as stepped cylinders with a counterpressure space, into which a likewise constantly kept counterpressure can be introduced, which maintains equilibrium with the admission pressure prevailing in the inlet pressure space of the respective wheel brake cylinder. A non-return valve arrangement, connected between the brake booster and the inlet pressure spaces of the wheel brake cylinders, blocks the return of the brake fluid to the brake booster when the pressure differential between the wheel brake cylinders and the brake booster drops below a threshold value P.sub.S.

Abstract: A device for the shifting of a multi-disk clutch for the locking of a transfer differntial for the drive of two vehicle axles of a motor vehicle, wherein the multi-disk clutch is engaged by means of the force of a spring and is released by means of an axial piston that can be acted upon by working pressure. The axial piston acts upon the set of disks via a pressure ring that, with respect to the disk carrier of one half of the clutch, is fixed in the direction of the clutch axis pointing away from a first counterbearing of the set of disks by a second counterbearing. The first counterbearing of the set of disks is coupled with the disk carrier by means of an adjusting arrangement that works toward displacing the first counterbearing by an additional spring force toward the pressure ring along the clutch axis.

Abstract: A monolithic exhaust gas catalyst, or catalytic converter, is arranged in a metallic housing and is supported against the inner surfaces of the housing by a resilient fiber material positioned therebetween. The resilient fiber material is provided with a catalytically active coating so that the exhaust gases which flow outside the exhaust gas catalyst and through the fiber material, are also converted by the treated fiber material.

Abstract: A floating-caliper disc brake is designed to prevent both tangential and radial oblique wear of the brake linings, especially under high brake stress. To achieve this, the floating caliper, which is guided displaceably on a brake carrier in the direction of the disc axis and carries a brake piston and which engages over the brake disc, forms a frame which in the transitional region of the transverse frame leg on the run-out side, extending in the direction of the disc axis, and of the longitudinal frame leg supported on one brake pad is more pliant than in the transitional region between the longitudinal frame leg and the transverse frame leg located on the run-in side. The brake piston is arranged in the frame so as to be offset in the forward direction of rotation of the brake disc relative to the surface center of gravity of the brake pad actuable by the said brake piston, and the longitudinal frame leg supported on one brake pad extends level with the brake piston.

Abstract: A heat pipe of aluminum is provided on the inside on all sides thereof with a completely closed fluid-tight coating of a water-resistant nickel in order to make the same resistant against water as heat carrier medium or to make the same vacuum-tight for long periods of time. Also, a coating of hard solder material is possible. The coating thickness is no less than 10 .mu.m and no more than 15 .mu.m. Individual parts of the heat pipe, prior to the soldering, are coated with the nickel material, each by itself, completely up to the joint areas. A process of making the heat pipe is also provided.

Abstract: In a vehicle seat having a seat cushion subdivided, for set depth adjustment, into individual upholstery elements in the transverse direction of the seat, the individual upholstery elements are connected together by a coupling mechanism. The coupling mechanism is designed so that each of the gaps appearing between the upholstery elements when the depth is adjusted has the same gap width, and the upholstery elements, after conclusion of the set depth adjustment, are fixed in their particular adjusted position.

Abstract: An unlocking prevention device for a steering wheel lock of that type having a driver acting on a detent pin and controlled by a locking cylinder shaft. During the unlawful removal of the locking cylinder, the shaft is shifted in its pull out direction by means of a force and the driver thereby engages into a groove, as a result of which the shaft cannot be removed and, because of the changed form of the shaft, the driver can no longer be actuated.

Abstract: A water diversion device is provided for directing dirty water from a vehicle window. A dirty water channel extends along an A-frame surrounding a vehicle windshield. The water diversion device includes a profile member extending toward the channel in an upwardly inclined direction. Guide webs hold the profile member in position and are also inclined to guide the water flow to the channel.

Abstract: A door holder for motor vehicle doors includes a housing with guide tracks and detent recesses as well as a guide body secured at a holding strap whose balls mounted in a bushing and acted upon by a compression spring by way of intermediate plates engage in the detent recesses, whereby the bushing surrounds the balls beyond half of their height, and in which the bushing includes at half of its length within its bore a support part for the compression spring, and the guide tracks are extended beyond the detent recesses up to an end abutment.

Abstract: A steering wheel arrangement for motor vehicles with a dish-shaped steering wheel provided with a steering wheel hub which is adapted to be flangedly connected on a central steering spindle rotatably supported in a casing, and with an impact device arranged inside of the steering wheel dish which maintains its position independently of the rotation of a steering wheel rim, whereby a gearing in the form of a pinion shaft is provided which is supported parallel to the steering spindle and has two identical pinions non-rotatably arranged on the same; the pinions are in engagement with gears coaxially supported with respect to the steering spindle, of which the first gear is arranged on the side of the steering column casing and the second gear on the side of the impact device.

Abstract: A low pressure fuel circulation with fuel preheating for an air-compressing injection-type internal combustion engine, preferably for commercial vehicles, in which a heat-exchanger and a by-pass by-passing the fine filter and having an excess pressure valve opening in dependence on a predetermined maximum pressure acting on the fine filter as a result of paraffin formation is arranged in an inlet line leading to a high pressure injection pump.

Abstract: An aerodynamic underfloor panel for the front end region of motor vehicles is disclosed. The panel includes an elastically deformable plate attached at its rear end behind the front wheel casings of the vehicle body and moveably guided at its front end by a guide arrangement disposed at a front bumper skirt. An hydraulically actuated adjusting mechanism is provided which includes a stirrup engaging the top side of the plate to bend the plate downwardly toward the roadway at high vehicle speeds to thereby decrease the aerodynamic lift. During the elastic bending of the plate, the front end of the plate is moved longitudinally of the vehicle along its guide support of the front bumper skirt.

Abstract: A shaft coupling comprises two coupling members, which are connected or adapted to be connected to respective shafts. One of the two coupling members is provided on a coupling face with an even number of bores, which have a uniform angular spacing and are either parallel to the axis of rotation of the coupling or radial with respect to said axis. A piston is slidably mounted in each bore and has a coupling end face with is beveled or crowned. Hydraulic lines are provided for applying fluid pressure to each piston at its rear end. The other coupling member is provided on a coupling face with an annular series of alternating elevations and depressions, which also have a uniform angular spacing. By the application of hydraulic pressure to the rear end faces of the pistons, the coupling end faces of the pistons are urged against the elevations and depressions.

Abstract: Use of a metallic partial composite laminate body which is provided with a large number of axially extending channels and is made by expanding a large number of layers, as support for exhaust gas catalysts of Otto-engines in which the mutually oppositely disposed non-inflated edge portions of the expanded partial composite laminate body serve for a particularly stable fastening of the support in the catalyst housing.

Abstract: An injection nozzle for injecting fuel into the combustion chamber of an air-compressing internal combustion engine is provided, having a valve closing member which lifts inwards from its valve seat as a function of the fuel pressure. The valve closing member is formed by a diaphragm which is firmly clamped in the nozzle body and lifts to a greater extent during the opening pressure of the injected fuel in the direction of the spray openings. A dilatant liquid or a non-dilatant liquid with a certain portion of gas is used as a closing spring for the diaphragm.