Abstract: In a cooling system for floatable and/or submersible motor vehicles having a liquid-cooled engine the radiator (1) is accommodated in a chamber (2), which during land travel is flown through by air supplied by a fan (V) and which admits water when the vehicle is submerged or floating. In order to decrease the loss of buoyancy when the vehicle is floating or submerged and to reduce any lateral shifting of weight, the chamber (2) contains a partition (5), which divides the heat exchange surfaces of the radiator into two sections at least on the cold side. The air supply duct (6) opens into the preferably larger compartment (2a), which is disposed on one side of the partition and provided with flow passages (8), which lead to the outside and are adapted to be closed. The other compartment (2b) is preferably smaller and is adapted to be shut off from the compartment (2a) and is the only compartment which is floodable.

Abstract: In a plate clutch, an annular cylinder chamber with a moveable annular cylinder portion is located in a transition region between a radial flange and a cylindrical external plate carrier integral with the radial flange. The position of the annular cylinder portion is fixed in the radial and axial directions relative to the external plate carrier by the flange which fixes the annular cylinder in one axial direction of the clutch axis and by means of a circlip in the other axial direction of the clutch axis. In order to improve the sealing of the working pressure chamber enclosed by the annular cylinder portion, the annular cylinder is supported in the radial directions by means of a ring seal, so that it can move and be also elastically carried on the external plate carrier.

Abstract: A transmission unit particularly intended for use as a differential between driven axles of a vehicle comprises an epicyclic gear train having three rotatable members, specifically, an input member connected to an input shaft, a second member connected to one section of a liquid friction coupling, and an output member connected to an output shaft. To avoid an occurrence of constraining torques as the vehicle is steered and to permit a modulation within a wide range of the relationship between the speed difference between the sections of the coupling and the torque limit of the transmission unit, the second section of the liquid friction coupling is non-rotatably connected to a stationary structure of the transmission unit, specifically to a housing of the epicyclic gear train. Alternatively, said second section of the coupling may be adapted to be held against rotation by a brake, so that the axles of the vehicles can easily be uncoupled from each other.

Abstract: An interaxle differential system connecting two driven axles of a motor vehicle comprises a restrainable differential and a planetary gear train, which comprises three torque-transmitting members which have parallel axes. Two of said torque-transmitting members are operatively connected to two output shafts of the differential. A restraining device is connected to the third of said torque-transmitting members. In an interaxle differential system for use in a passenger car, the restraining device is a controllable liquid friction coupling, one coupling half of which is held against rotation.

Abstract: In a pressure-regulating arrangement for the control pressure of a shifting arrangement of a change-speed transmission, a slide valve member is actuatable by an adjusting sleeve connected with a control member of a driving engine by way of a pressure member. A hydraulic damping device with two mutually relatively movable damping parts of the piston-cylinder-type construction is provided in which one damping part is adapted to be supported with respect to the housing and the other is actuatable by way of the pressure member and damping medium is thereby displaced against the action of a throttle.

Abstract: A control system for controlling an internal combustion engine which is provided with at least one fuel injection pump which comprises for the control of the fuel injection pump a control rod, a servomotor, which is adapted to be mechanically coupled to said control rod, and a microcomputer for controlling said servomotor in dependence on operating conditions of the engine and on the position of an arbitrarily operable travel control lever. Means are provided for establishing a direct mechanical connection between the arbitrarily operable travel control lever and the control rod so that the latter can be moved under the control of the travel control lever in case of a failure of the electric system which comprises the sensors, the microcomputer and the servomotor.

Abstract: The invention relates to a lock for safety belts, which is designed to receive a lock tongue provided with a deflection web and is equipped with a press button and which is arranged next to a high storage compartment, center armrest or the like. To make it possible to actuate the lock easily and properly for safety purposes in spite of the high storage compartment located next to it, according to the invention, the top edge of the lock tongue and/or of the press button extends upwards relative to the load bearing deflection web of the lock tongue into the vicinity of the top edge of the storage compartment, center armrest or the like.

Abstract: A modulator for a vehicle with a power-assisted hydraulic multiple-circuit brake system, providing an output pressure to a static brake circuit that is proportional to the sum of the forces affecting a pressure modulator piston. These forces include a pedal pressure from the brake-pressure control device to a first driving pressure space of the modulator and booster pressure from the pressure of a proportional control valve to a second driving pressure space of the modulator, which shifts the modulator piston to decrease the output pressure space. Forces produced by auxiliary pressure in a counterpressure space shifts the modulator piston to enlarge the output pressure space. A control valve arrangement disconnects the second driving pressure space from the booster pressure and instead relieves pressure of the second driving pressure space in pressure-reduction phases of the antilock control.

Abstract: A foot-supporting body in a motor vehicle is provided which is capable of supporting both feet of a passenger while reducing the intrusion depth, reducing the change in intrusion speed and performing deformation work. The foot-supporting body is made as a pure hard-foam moulded body which--arranged on the passenger/driver side of the end wall--extends beyond the left-hand foot-placement area at least as far as the area covered by the brake pedal. The inherent rigidity of the foot-supporting body, as viewed in the loading direction, which can be permanently deformed, is below that of the allocated area of the end wall. Polystyrene--or polyurethane--foamed plastic, with a lower volumetric-weight limit of about 20 g/dm.sup.3 is preferably used as the moulded body material in certain exemplary embodiments.

Abstract: A thrust-control device for a motor vehicle having wheels driven on one axle, with a dual-circuit brake system having a tandem main brake cylinder and a brake booster supplied from a special auxiliary pressure source, with an anti-lock system having a brake-pressure medium return device, and with a pressure accumulator serving for thrust control, is extended for use on vehicles with a connectable or permanent all-wheel drive, to the effect that a stop valve is arranged in the brake circuit of the wheels of the further axle and there is a control valve controlling the accumulator pressure and acting on a pressure modulator, the pressure modulator influencing the brake pressure in the brake circuit of the wheels of the further axle when the drive of these wheels is connected and drive slip occurs. This simple extension requires no additional accumulator and makes it possible to preserve the independence of the brake circuits.

Abstract: A hydraulic brake-power booster unit is provided for a vehicle having a dual-circuit brake system and an antilock system operating according to the drain principle. When the brake system is intact, the booster unit provides dynamic pressure to one of the two brake circuits and static pressure admission to the other. The pressure to the static brake circuit takes place by the separate-power-assisted shifting of an emergency piston. On one side, the emergency piston delimits an output pressure space to which the brake circuit that can be statically acted upon by pressure is connected. This brake circuit also remains operable in the case of a breakdown of the hydraulic power source only by the operation of the pedal and the resulting possible shifting of the emergency piston. A path transducer generates an electrical signal proportional to the position of the emergency piston.

Abstract: A split flywheel for reducing the transmission of vibrations from the engine to the drive shaft at certain frequencies of the flywheel is provided. Included are two flywheel elements drivingly connected to one another wherein one of which is connected or can be connected in a driven manner to the engine and the other of which is connected or can be connected in a driven manner to the drive line. The resonant frequency of the split flywheel unit is well below the frequency of engine vibrations which occur during normal traveling, so that only slight amplitudes of vibration occur between the flywheel elements during normal travel operation. However, during start-up of the engine, the resonant frequency of the flywheel is passed through. The drive connection between the elements a slip clutch having a greater friction contact than the maximum torque of the engine, placed in series with a spring mounting and positioned between the two flywheel elements.

Abstract: A system for the air-conditioning of the interior of a motor vehicle having an engine cooling circuit is provided which has a water/air heat exchanger and a water/water heat exchanger connected in series in the engine cooling circuit. The water/air heat exchanger is arranged upstream of the water/water heat exchanger. The water/water heat exchanger is between the water/air heat exchanger and panel heat exchangers which are located in the interior of the vehicle.

Abstract: This invention relates to a suction housing of a lubricating-oil pump inserted in a lubricating-oil storage tank of an aggregate of vehicles having a distributing regulator with a mass that is guided in the direction of the accelerating forces affecting the vehicle for the regulating of valve openings. In order to obtain a suction housing with a low overall height and a simple arrangement of valves, the distributing regulator is developed to be plate-shaped in which case the valves are movably suspended at the sides of the distributing regulator.

Abstract: A process for increasing the process temperature of an air compressing internal combustion engine includes mixing exhaust gas with the intake air. The amount of exhaust gas to be recirculated is set with reference to speed and load. To achieve an increased process temperature within a short period and with unrestricted internal combustion engine power, the intake air is preheated, taking into account a predetermined limit temperature of the coolant, when the engine is operating between a lower and upper speed range at 90% useful power. The intake air is also preheated in a subsequent speed range, extending up to 90% of the nominal engine speed, at 75% useful power of the engine. Exhaust gas is mixed in with the intake air between a medium to upper speed range and up to 75% of the useful power. The recirculated stream of exhaust gas is reduced, depending on the vehicle velocity and the percentage of useful power.

Abstract: A circuit arrangement for the automatic engagement of a motor vehicle hazard warning system in case of impact accidents and emergency braking situations which includes an inertia switch with high response threshold and an acceleration sensor connected in parallel thereto with low response threshold whose output signals each serve for engaging the hazard warning system. The output of the acceleration sensor is connected to an evaluation circuit with an integrator and an threshold switch which prevents that also pulse-shaped output signals of the acceleration sensor lead already to turning on the hazard warning system.

Abstract: A fresh air supply device in a motor vehicle which is installed in an accessories compartment. The engine compartment partition and passenger compartment partition which adjoin the accessories compartment are joined together in the center of the vehicle by means of a frame in which a lower trough-like casing part equipped with a blower is suspended from above. A water separator forming an integral component part of the upper casing part disposed on the lower casing part surrounds an upwardly projecting connection piece carrying a fine filter by its collecting vessel and by the two water outlets leading away therefrom.

Abstract: An axle and suspension assembly for mounting two unsteerable wheels of a motor vehicle comprises a crosspiece secured by means of elastic mounting bodies to a rigid structure of the vehicle. The mounting bodies have different stiffnesses in different directions in a generally horizontal plane. Two wheel carriers are linked to the crosspiece by means of two lower transverse control arms arranged at acute angles to each other, and, in addition, each wheel carrier is connected to the rigid structure by a longitudinal control arm. The crosspiece is also connected to the rigid structure of the vehicle by two diagonal struts.

Abstract: A planet-wheel power divider operates with a planet carrier and other transmission members in the form of three central wheels, with an input shaft connected to one central wheel, with an output shaft drivingly connected to one central wheel, with an output shaft drivingly connected to one of the other three transmission members and arranged centrally relative to the main axis. A second coaxial output shaft in the form of a hollow shaft is used to drive a parallel auxiliary drive shaft and can be coupled alternately to two of the three transmission members by shiftable clutches. A main planet meshes with an auxiliary planet and an outer central wheel, used for the constant connection to the input shaft, and an inner central wheel meshes with the main planet and a further inner central wheel meshes with the auxiliary planet.

Abstract: A shifting arrangement for the shifting between a single-axle standard drive and an all-wheel drive having a first clutch for the locking of a central differential gear and a second clutch for the connecting and disconnecting of one vehicle axle actuated by first and second pressure medium control element respectively against the force of a spring having first and second shift valve respectively controlled by an electronic control unit, to either supply working pressure or relieve from pressure respective control elements. The improvement including a hydraulic identifying valve for bringing the control elements into a mutual interaction. The identifying valve operates, as a function of the working pressure of at least one of the control elements and exclusively during the simultaneous controlling of both shift valves, in such a way that the clutch torque at both clutches increases and decreases approximately to the same extent.