Abstract: In an air quantity measuring device for a continuously operating fuel injection system, the baffle plate which actuates the control piston of the fuel quantity distributor by way of a lever, is provided with a raised portion on the inflow side thereof; to reduce the air-resistance of the baffle plate in a predeterminable manner, the peak of the raised portion is disposed eccentrically to the baffle plate in the lever-side half thereof, whereby the same air quantity measuring devices can be used for different measuring ranges by installing baffle plates with differently shaped raised portions.

Abstract: A numerically controlled groove-stamping machine which includes an indexing unit rotatable stepwise by means of a positioning drive about a rotational axis as a function of a stroke of a punch of the groove-stamping machine. The indexing unit is adapted to be driven, in a stepwise fashion, in two intersecting directions running at right angles to the rotational axis. A numerically controlled automatic multiple tool set is provided with the set being equipped with, for example, a stator groove and cut-off tool, a rotor groove tool, and vent hole tools. The tools of the multiple tool set, in accordance with the work steps to be executed, are adapted to be brought into engagement in an individually controllable manner.

Abstract: The safety helmet has a viewing opening which can be covered by a visor. Several vent openings and air passage openings are arranged at the chin protector of the safety helmet. Such openings terminate together into an air-collecting chamber provided on the inside of the chin protector. Two ventilating tubes extending to the top edge of the viewing opening lead away from this air-collecting chamber. An air stream produced by a pressure head passes through the vent openings--as well as through the air passage openings if the visor is opened somewhat--into the air-collecting chamber and is conducted by the ventilating tubes onto the inside of the visor, thereby substantially preventing any fogging of the visor by moisture precipitation.

Abstract: An installation for damping periodically alternating longitudinal accelerations of a motor vehicle, which are also designated as jerking movements and which occur, above all, in motor vehicles whose internal combustion engines are equipped with electronic fuel injection systems and have a high torque already in the lower rotational speed so that they react very rapidly and sensitively to movements of the gas pedal; the jerking oscillations are thereby damped by the installation of electric and/or hydraulic damping devices into the control system for the fuel-, respectively, mixture-admixing installation.

Abstract: A wheel cover with a retainment arrangement that includes several U-shaped retaining springs clipped onto a circumferential ring; the retaining springs engage thereby with one leg in a groove-shaped recess provided in the wheel rim while the circumferential ring consists of a separate essentially non-springy support ring; the wheel cover is thereby supported at the support ring while the retaining springs are clipped onto the support ring.

Abstract: The invention relates to a drive axle for a motor vehicle, which axle can be driven by an internal combustion engine or an electric motor, according to choice.For the above-mentioned purpose, a changeover gear unit is installed on the axle beam of the drive axle, this gear unit being equipped with one gear unit input shaft for each drive unit, it being possible to connect these drive unit input shafts, individually, to the gear unit output shaft driving the differential gear, coupling being effected by means of a shifting clutch, the axes of the shafts extending at right angles to the axis of the axle beam.The drive ends of the two gear unit input shafts are located on opposite sides of the changeover gear unit, so that the two drive units can be positioned on different sides of the axle and, as a result, the axle loading is configured in a correspondingly advantageous manner.

Abstract: A headrest in passenger cars which is pivotable from its foremost position, required for performing its safety function, into at least one rearward position, from which latter position the headrest can be pivoted automatically back into the foremost position under the force of inertia acting on the headrest in case of strong deceleration of the automotive vehicle and can be locked into such foremost position, so that the headrest, even if pivoted into the rearward position to enhance the occupant's comfort, is, in case of necessity, automatically ready in the foremost position to fulfill its safety function. In connection with a headrest at the rear vehicle seat, such headrest can additionally or alternatively be pivoted onto the hat shelf underneath the rear window of the vehicle so that, when the rear vehicle seat is unoccupied, the driver's unobstructed field of vision via the inside rearview mirror toward the rear is not impaired.

Abstract: Cooling circuit for internal combustion engines, with an excess-pressure valve which, when the cooling circuit is under full thermal load, limits the pressure in the feed to a value at which the pressure on the suction side of the coolant pump is always above the boiling pressure of the cooling medium, even at full delivery level of the coolant pump. The efficiency of the cooling function is improved as also the structural expenditure in connection with the cooling circuit is reduced thereby and also by the central arrangement, in the filling stub, respectively, the cap thereof, of additional excess-pressure and vacuum valves, of a throttle for a venting flow, of a level float switch for the filling level indication in the cooling circuit and of a blocking device against the opening of the cap which is under pressure.

Abstract: A reciprocating piston internal combustion engine equipped with a vibration-damping balancing shaft that is rotatably supported in a bearing housing which in turn is secured at the cylinder crankcase by means of a threaded connection; in order to support the rotational forces of the balancing shaft between bearing housing and cylinder housing without play, at least one of the bolts of the threaded connection includes a conically shaped neck that cooperates with a corresponding chamfering in the bearing housing.

Abstract: The present invention describes a method for increasing the endurance of oil lubricated conical roller bearings, in which the guide surface is coated with a lubricating paint that is insoluble in oil. A coating of a molybdenum disulphide lubricating paint with a thickness of 3 to 8 .mu.m is preferred. The coated bearing also exhibits reduced friction and quieter running, even when the lubricating paint has been worn off.

Abstract: The invention relates to an exterior mirror for vehicles, with a mirror-housing which, in normal operation, is retained in a fixed location on the vehicle and which, in the event of a collision, can fold away, forwards or backwards, until it assumes at least an approximately flat position against the vehicle. Folding occurs about a pair of pivot-axes. A mirror-shell, carrying a reflector, is retained in the interior of the mirror-housing. An aerodynamically efficient fairing is provided on the leading side of the mirror-housing. In order to be able to design the fairing with a shape which is particularly aerodynamically efficient, namely with a shape which is particularly long in the direction in which the vehicle travels and which resembles a wedge, while nevertheless being able, on the other hand, to permit the mirror to fold away effectively and with little overhang, at least one separate pivot-axis is provided for the fairing of the mirror-housing.

Abstract: A table-like support installation for papers and the like is mounted to a covering frame of a sliding window. In order for the support installation to be arranged on the covering frame in a non-disturbing manner, two support elements are included, of which one support element is fixed to a first frame section and the other support element is movable from a rest or recessed position into an operating or extended position. Movement from the operating or extended position to the rest or recessed position of the movable support element is accomplished by the manual release of a latching mechanism or automatically when the sliding window is moved toward an open position.

Abstract: A process for intermittent control of a cyclically operating internal combustion engine wherein, in the succession of working cycles, working strokes are skipped--in approximately uniform distribution--and the number of skips is varied in dependence on the load. Fuel is fed in a controlled fashion only to the nonskipping working chambers of the internal combustion engine independently of the load in a constant quantity optimal for consumption. For a sensitive power distribution, especially in the low load range, the number of skips is varied chronologically at least approximately randomly and independently of the speed, i.e., the temporal density of the working strokes is varied. This can be accomplished by setting differently finely staggered firing patterns or by a stochastic ignition setting.

Abstract: A reciprocating lens-like combustion space is formed in a piston internal combustion engine which is located with approximately one-half in a recess of the piston top and with approximately the other half in the cylinder head. By the dimensioning of the combustion space and the coordination thereof to the inlet and exhaust valve, a vortex flow is produced with a ring-shaped mixing zone of high fuel concentration, in which the ignition electrodes of two spark plugs are arranged diametrally opposite one another.

Abstract: The timing of the signal to the primary of an ignition coil is controlled by selectively connecting impedance to a transducer in accordance with an engine operating parameter such as revolutions per minute.

Abstract: A diesel internal combustion engine with a soot filter in the exhaust system is equipped with a controllable soot burn-off device. The latter comprises a burner arranged in the soot filter and is operable with fresh air separately fed to the soot filter.In order to render the soot burn-off device useful for several purposes, this device is switchable to serve as a warm-up means which heats up the engine and or its running and operating media during or before operation.

Abstract: A hydraulic chain tightener with a hollow piston longitudinally movably guided within a hydraulic housing; the hollow piston is closed off at the top by a throttling plug and the hydraulic housing is to be vented by way of the channels of the throttling plug; an expansion space is formed between the throttling plug and the pressure space present at the bottom side of the hollow piston, which is closed off with respect to the pressure space by a ball check valve; during chain impacts on the hollow piston and corresponding pressure increases in the pressure space, the check valve opens and enables by pump action a rapid venting of the hydraulic housing.

Abstract: In a valve control, at least two valves (16, 17) per cylinder head (11) are actuated in unison by a cross member (18) moved by a rocker arm (13). The rocker arm (13) and a guide member (15) are pivotally connected with the cross member (18) and form a parellelogram for the rectilinear guidance of the cross member (18). The valve clearance compensation and the accurate abutment of the cross member (18) at both valve stems is attained by adjustment of the fixed points of rotation of rocker arm (13) and guide member (15). Adjustable eccentrics are arranged in the points of rotation, which cooperate with at least one automatic adjusting mechanism (28, 30). The eccentricities (23, 26) of the two eccentrics are disposed perpendicular to one another in the starting position. During the entire operating period, freedom from clearance and a constant control geometry are assured for the valve control.

Abstract: An arrangement for regulating the torque transmitted by friction type gear shifting elements whereby, at every point in time throughout a previously specified time duration of a gear shifting operation, the clutch torque which is necessary at that point in time and is defined as a minimum torque, is computed utilizing measured values of an input and output rotational speed of a change-speed transmission or a gearbox, as well as measured values of an operating pressure of the friction-type gear shifting elements. At the minimum torque the relative rotational speed of the parts of the friction-type gear shifting elements, for example, parts of a friction-type clutch, a difference between an input and output speed of the change-speed transmission or gearbox remains constant. At the same time, an additional torque is computed in accordance with a prespecified function.