Abstract: A vehicle passenger, or the like headrest equipped with an arrangement to secure an end position is disclosed. In order to accommodate removal of the head rest with both hands after the cancelling of a locking effect, a remote control is provided in the form of an operating rod extending approximately in axial direction of a headrest support rod. When the operating rod is operated, the catch is guided into a secured disengaged position which, when the support rod is pushed in again, by the effect of the support rod, is cancelled again so that safety is not sacrificed.

Abstract: A heating or air-conditioning system for passenger cars is described that is equipped with a main heat exchanger comprising a ribbed-tube block against which the air flows that is guided into the passenger space and of a forward-flow radiator tank through which water flows and a return-flow radiator tank. The heating or air-conditioning system is also equipped with one or several additional panel radiators that are connected to an additional circulating system and are arranged so that they are distributed at or in the interior of the vehicle. This additional circulating system has a forward-flow chamber that is assigned to the return-flow radiator tank of the main heat exchanger. As a result, the advantage is achieved that the panel radiators, during the heating operation, can be acted upon directly from the main heat exchanger by a lower temperature. Also, the advantage is achieved that the panel heat exchangers in the cooling operation of the air-conditioning system, may also be used for cooling.

Abstract: A road heating installation which is supplied by heat stored in the ground and which includes heat pipes placed heat-conductingly with the road surface, is provided with sensors for detecting the climate factors relevant for the road condition and is equipped with a control apparatus that controls the heating installation as a function of the climate. In order to remove the heat energy stored in the ground only in case of need and to avoid the unnecessary exhaustion thereof, the invention provides that the heat transfer capacity of the heat pipe is controllable by a reversible blocking of the condensation zones of the heat pipes and the blocking is brought about in case of a dry-cold by the supply of an inert gas into the condensation zones of the heat pipes which is quantity-regulatable directly from the outside.

Abstract: The invention concerns a device for increasing the rotational speed of an exhaust gas turbo-charger on an internal combustion engine. The compressor casing of the exhaust gas turbo-charger is located in the engine air induction duct. The compressor includes a compressor impeller and a volute-shaped gas duct, a guide device being located in the induction duct upstream of the suction-side opening of the gas duct. In order to reduce the power consumption of the compressor during idling and lower part-load operation, the inducted air is guided into a bypass duct by means of the guide device, the bypass duct entering the induction duct downstream of the compressor. The compressor is partially evacuated by means of a pressure-reducing device located in the bypass duct.

Abstract: A process is described for the determination of the aging condition of an exhaust-gas catalyst for an internal combustion engine which is fitted with .lambda.-controlled regulation of the fuel/air ratio. In the process, the switching of the fuel/air ratio from rich to lean and vice versa is delayed and the content of the combustibles in the exhaust gas downstream of the catalyst is measured. With delayed switching, complete conversion of the exhaust gas only occurs when the catalyst still possesses its full oxygen-storage capability. Since the oxygen-storage capability decreases with increasing age of the catalyst, the degree of conversion or the proportion of combustible components arising in the exhaust gas when conversion is no longer complete is a direct measure of the aging condition of the catalyst. A catalyst can thus be replaced in good time before it is completely destroyed and before undesired components of the exhaust gas reach the atmosphere.

Abstract: A locking arrangement for a motor vehicle door in which a lock housing with a rotary catch acting on a locking bolt on the side of the body, a spring-loaded locking latch, a knee lever arrangement engaging at the rotary catch and at the housing which is formed by two lever members connected in a dead-center joint, and an actuating mechanism is provided, whereby two end positions of the dead-center joint which are coordinated to the locking, respectively, the open position of the rotary catch, are determined by control abutments, and whereby a torque is to be introduced into the rotary catch by means of the actuating mechanism by way of the knee lever, by means of which the door is adapted to be transferred into the locked position against the force of an elastically deformed door seal. This lock arrangement is characterized in that the closing force is to be introduced manually into the actuating mechanism by a door handle at which a return device is effective.

Abstract: In order to bring about a single-handed actuation during the insertion operation of the buckle latch into a belt buckle arranged recessed in its non-use position in a pocket of a seat part, the pocket is lined by a shell and the shell is provided with a guide surface along which slides the emplaced buckle latch in the direction of the receiving funnel of the belt buckle. The guide surface may be provided with a guide groove for the positionally correct latch guidance. However, also a push button may extend therethrough whereby the stroke movement produced by actuation by the belt latch is transmitted onto the belt buckle by means of a transmission device.

Abstract: In a mechanical sighting device for rifles, the front sight (6) is adjustable vis-a-vis the rifle barrel (1) as to height and sidewardly. In order to enable a height- and a sideward-adjustment independently of each other, and to guarantee at the same time a sturdy construction to be operable in a simple manner, the carrier (3) is supported slewably about the rifle barrel (1), and there is provided a finger (2) affixed on the rifle barrel (1). In the carrier (3) there is supported a setting screw (11) which crosses at right angle the rifle barrel (1), or the swivel axis of the carrier (3), respectively, and is supported on the finger (2). The foresight (6) is screwed into a bore (5) radial to the swivel axis of the carrier (3).

Abstract: Apparatus for controlling a vehicle suspension system includes acceleration sensors mounted on the vehicle for producing electrical signals representative of road surface undulations or irregularities, processing circuitry for processing the sensor signals to produce control signals, and a shock absorber or damper having adjustable damping characteristics. The damper preferably includes two chambers connected by a controllable bypass. One of the chambers becomes smaller during compression of the suspension system, and one becomes smaller during expansion. A controllable throttle and/or valve is provided in the bypass to adjust the damping characteristic of the absorber. The circuitry produces control signals H and w which are representative of the average height of the overall road surface undulations, and a ratio of average heights of long-wave and short-wave undulations, respectively.

Abstract: In a steering system with auxiliary force assist for vehicles, especially motor vehicles, steerable vehicle wheels are connected by way of a steering gear with a steering hand wheel as also with a pressure medium servo motor. A central steering limit valve which reduces the working pressure of the servo motor upon reaching a maximum value of the deflection angle of a steering wheel as fixed by mechanical end abutments at the vehicle, is connected directly with the pump pressure line of a steering assist pump connected with the servo motor and is also controllable by sensors influenced by the deflection angle. In order to be able to utilize the smallest possible turning radius with auxiliary force assist, without having to expose vehicle frame and steering linkage to high servo forces in the abutment positions, the sensors are arranged at the end abutments and produce a control signal changing with the deflection angle.

Abstract: A temperature compensating fluid friction clutch is disclosed. The fluid friction clutch comprises a housing substantially filled with a viscous fluid, a shaft disposed within the housing, and mutually interengaging inner and outer plates connected to the shaft and housing for rotation about an axis within the housing. Spacers are located in the gaps between the plates, while the plates are axially displaceable so as to vary the size of the gaps. Temperature responsive elements are also provided to compensate for any reduction in the fluid viscosity when the temperature of the fluid rises. The temperature responsive elements, which may be in various forms, act to decrease the size of the gaps between the inner and outer plates when the temperature of the viscous fluid rises. In one embodiment, the temperature responsive elements comprise an expansion element connected to the inner and outer plates and which expands upon an increase in temperature.

Abstract: Apparatus for the automatic engagement and disengagement of the drive components of a motor vehicle, particularly of the drive of at least one additional axle and/or of locks for auxiliary gear and/or differential gear. The apparatus has sensors for sensing the rotary speeds of the wheels and the steering angle of the vehicle and a control unit which activates the drive components individually, simultaneously or in a given sequence as a function of: The travelling speed; the vehicle acceleration; the slip of the wheels; and the movement condition of the vehicle as a function of the steering angle. The apparatus also has an adaptively operating matching electronic system for accounting for the rotary speeds of the wheels and for the steering angle. An advantage of this apparatus is the engaging of required drive components automatically with narrow limit values and tolerances in necessary situations.

Abstract: A sliding and lifting roof construction for vehicles having a rigid cover of the type which closes a roof opening in a fixed roof surface in a closed position thereof and is selectively shiftable from the closed position by either being upwardly tilted so that a rear edge of the cover is disposed above the fixed roof surface or by being slid rearwardly after lowering of the cover rear edge below the fixed roof surface, and has a tiltable, sliding roof liner panel that is slidable together with the cover and which, upon raising the cover, is induced into a raising movement that, starting from the closed position of the cover, is faster than the raising movement of the cover; wherein the tiltable siding roof liner panel, at least on one of its sides, is coupled with a pivotable lifting arm.

Abstract: The breech block of a hand firearm consists essentially of a breech block carrier being displaceable against the force of a return spring, and a breech block being supported for relative movement in the breech block carrier and being traversed by an ignition pin. The barrel of the hand firearm is firmly connected with the stock or similar part thereof. In order to reduce the return speed of the breech block without increasing its mass, the breech block carrier is provided, behind the closing element being longitudinally displaceable in the same, with a latch which is located in the plane of symmetry of the lock and can be displaced transversely to the direction in which the barrel extends. In closed position of the breech block, the latch is in contact, with little play, by means of a rearward oblique face thereof, with a counter face of the stock or the like part. Moveover, the latch and the breech block have faces of equal slope adapted for cooperation as a pair of "inclined planes".

Abstract: A driving connection between spline shafts and spline bore hubs of safety steering columns, where the shaft and the hub, because of prestressing torque existing between the two, can be shifted with respect to one another axially but are free from torsional play. The prestressing torque is generated by a torsion spring element supported between the shaft and the hub. The required freedom from torsional play is achieved by arranging a main hub and an additional hub on the shaft with the torsion spring element connecting the main hub with the additional hub so that the main hub and the additional hub are spring loaded in opposite rotational directions.

Abstract: A unit for coupling a displaceable operating member such as a bar or shaft with a regulating member, in particular a regulating rod of a fuel injection aggregate of an internal combustion engine, comprises a casing and a cam which can be clamped on the operating member, by means of a screw, to project therefrom. This cam which comprises an internally threaded nut engages the regulating member whose movement in one direction is limited by a stop or the like abutting organ. The operating member is provided with a transverse bore which can register with a bore in the casing, and a fixing pin is lodged in the casing bore and the transverse bore when the regulating members are in a basic position. In order to attain automatically the positioning of the cam and the operating member relative to each other, achieved by a basic adjustment, and to provide a relatively simple construction facilitating assembly of the unit, the internal nut threading is designed to be self-locking.

Abstract: A transmission for a motor vehicle comprises a multispeed change gear set comprising a plurality of loose spur gears and a plurality of fixed spur gears, each of which is permanently in mesh with one of the loose spur gears. The transmission comprises a second gear set, which is adapted to be selectively driven by the change gear set. The change gear set comprises an input shaft and two gear set output shafts. The loose spur gears for relatively low speeds are rotatably mounted on and adapted to be coupled to the first gear set output shaft. The loose spur gears for relatively high speeds are rotatably mounted on and adapted to be coupled to the second gear set output shaft. To simplify the structure and to reduce the overall size of the transmission in the direction of the input and output shafts, an additional spur gear is non-rotatably mounted on each gear set output shaft and is in mesh with a common idler gear, which is adapted to be coupled to a pinion, which is in mesh with a final output gear.

Abstract: An air-compressing reciprocating piston-equipped internal combustion engine comprises, in a piston head of the piston, a cavity being axially symmetrical about a central cavity axis and constituting a combustion chamber, as well as a fuel injection nozzle for injecting fuel directly into the said cavity. The nozzle has a longitudinal nozzle axis which encloses with the central cavity axis an acute angle. In order to generate a rotary motion of an air charge fed into the said cavity, there is provided a correspondingly designed air-feeding unit.

Abstract: A central locking system in a motor vehicle, by means of which an automatic locking of at least the rear lid is effected in every case when the vehicle is driven with non-desired locking of the doors.

Abstract: An air-compressing reciprocating piston-equipped internal combustion engine comprises, in the frontal face of a piston head, a rotation-symmetrical cavity as a combustion chamber, a fuel-feeding unit generating a rotary motion of the air charge entering the cavity, and a fuel injection unit. The fuel injection unit is provided with an injection nozzle for injecting fuel directly into the cavity constituting the combustion chamber. In order to achieve a higher degree of efficiency, a decrease of the emission of polluting gases and of noise, as well as a relief of the mechanically highly stressed parts of the engine, the rotary motion of the air charge generated by the fuel-feeding unit is given a swirl number of about 1.5 to 2.5. Furthermore, the diameter (d) of the combustion chamber-constituting cavity is between about 55 to 75% of the diameter (D) of the cylinder, and finally, the fuel injection nozzle has at least four orifices.