Abstract: An electromagnetically actuatable valve is proposed, which serves as a fuel injection valve for fuel injection systems in internal combustion engines. The valve includes a valve housing of ferromagnetic material, at least one magnetic coil mounted on a core of ferromagnetic material, and an armature arranged to actuate a valve closing element which cooperates with a valve seat. The armature protrudes beyond a ferromagnetic annular disk supported on a support shoulder of the valve housing and a stop disk of hard, nonmagnetic material is arranged in the annular groove of the annular disk such that when the armature is resting on the stop disk, a remnant air gap is formed in the axial direction between the annular disk and the armature.

Abstract: In a method and apparatus for controlling tank venting in internal combustion engines, a regenerative flow of fuel is released from the activated charcoal container to the negative-pressure side of the intake tube of the engine and an adaptation in the computer area for the fuel metering quantity simultaneously is prohibited, or vice versa, an adaptation is authorized and a regenerative fuel flow is prohibited, by cyclical triggering, as a function of whether the throttle flap angle drops below, or exceeds, a predetermined threshold value. Parallel to this, a continuous activated charcoal filter regeneration is provided that comes into play at relatively large air throughputs, by means of a branch line leading into the air filter area upstream of the throttle flap; furthermore, if the throttle flap angle threshold value is exceeded, both the regenerative fuel flow via the tank venting valve and the adaptation in the computer area are authorized.

Abstract: The synchronously demodulated chrominance signals (C.sub.1d, C.sub.2d) each alternately represent, line by line, the sum and difference of the color difference signals U and V. They are supplied to a multiplexer (21) switched by a meander wave having a 2H oscillation period and supplied therefrom to an accumulator for evaluation of the synchronizing color carrier bursts. During the burst, a succession of sampling frequency pulses sample the burst portion of one chrominance signal (C.sub.2d) with the results being added in an accumulator and then loaded in a first register (25) to provide a control signal for the color carrier oscillator and from the burst portion of the other chrominance signal (C.sub.1d) a potential is similarly produced by the accumulator, loaded in a second register (26) and evaluated in a PROM to determine whether the switching of the reversal circuit or one of the color difference signals (V) is timed for the correct horizontal line or for the wrong one.

Abstract: A fuel injection pump for internal combustion engines, in which at least during normal engine operation the injection quantity is effected by controlling a fuel quantity control conduit which is provided in the pump piston in communication with the pump work chamber, via a control slide that is displaceable on the pump piston in cooperation with fuel quantity control openings, the axial position of the control slide determining the onset and end of supply. The earliest possible supply onset is further determined by a supply onset control opening disposed in the pump piston, which opening is sealed by entering into the cylinder liner after a pre-determined stroke extent has been traversed. Subsequent to this entry, an injection pressure can build up in the pump work chamber.

Abstract: In a potentiometer, wherein switching functions are triggered in association with the potentiometer position electrical switches (21-24) are mounted on the potentiometer plate (1) which supports the collector path (11) for the purpose of the very accurate association of the switching operations with respect to the potentiometer position and with spatially fixed switch on and switch off points with respect to the collector path (11). The switch elements which effect the switching on and off are mounted ona potentiometer setting member (17) electrically insulated which supports the customary potentiometer slider (19,20). Advantageously, each switch (21-24) is formed by a contact path (25-28) and a contact finger (29,30) rotating and sliding over the associated contact path (25,28), whereby the contact finger is mechanically connected with the potentiometer member (17). The beginning and the end of the contact paths (25-28) define the switching on and off point of each switch (21-24) (FIG. 1).

Abstract: An electromagnetically actuable fuel injection valve, which serves to supply fuel to mixture-compressing internal combustion engines having externally supplied ignition. The fuel injection valve includes a base plate into which pole pieces having bent poles are inserted. Magnetic coils are fitted onto the pole pieces. A first permanent magnet is inserted between the poles and a second permanent magnet is disposed between the magnetic conductor elements disposed on the other end of the pole pieces. Beginning at the base plate, the magnetic coils and the pole pieces are provided with a sprayed-on plastic jacket. The plastic jacket is inserted together with the base plate into an internal housing bore of a valve housing.

Abstract: A fuel injection pump including a control device is proposed in which a control lever which determines the fuel injection quantity is placed at an adjustable spring which is not supported by the main power source of a governor lever. The control lever is subjected to lesser forces provided by the intended auxiliary springs, starting springs or idling springs.

Abstract: To protect electrical equipment against excessive applied input signals which, for example, may be analog signals, excessive with respect to positive or negative excess voltage in relation to an upper reference level (U.sub.Ref) and/or a lower reference level (GND), collector current control of the transistor (12) at the input (3) of the protective circuit by three transistors (11, 13, 14) holds the voltage level at the input (3) at the reference voltage level when a driving or signal supply circuit provides an excess voltage. The input transistors, and the further transistors, are connected in the form of a current mirror. The circuit can be constructed in dual form (11-14; 21-24) to provide for protection against negative over-voltage as well. Due to the symmetrical circuit structure, excellent temperature compensation is obtained. The circuit can easily be constructed in the form of an integrated circuit.

Abstract: A fuel injection pump for internal combustion engines has at least one pump working chamber which is defined on one side by the end face of the pump piston and the wall of the cylinder, and on the other side by a screw closure, the screw closure comprising a stopper containing a plug. The stopper can be tightened onto the cylinder by a sealing sleeve, and the stopper preferably comprises an outer threaded ring and an internal threaded sleeve soldered into the latter.

Abstract: A plurality of controller devices in a motor vehicle are tested via a single test line to indicate the occurrence of a function error which is stored in a corresponding device. To initiate the test, the test line is set to logic zero, e.g. Then all devices apply to the test line predetermined priority pulses whose lengths correspond to the order of the assigned priority and which keep the test line at zero level. After the expiration of the longest priority pulse, the test line is automatically set to logic one and the control device with the highest priority is interrogated during a predetermined time interval for the function error. Then the remaining control devices automatically apply their priority pulses to the test line, a control device with the subsequent highest priority is interrogated as to its function error, and the testing process is repeated until all devices are interrogated in the order of their priorities.

Abstract: A fuel filter includes a housing made of plastics and having a main housing portion accommodating a filter element, and a cover. The housing portions are tightly connected to each other at a single ring-shaped glue spot. The housing portion is formed with a pocket filled with glue and the cover is formed with a collar partially projecting into the pocket to form an annular Z-shaped gap in which the glue is distributed. When the glue is solidified the housing and the cover become rigidly and tightly connected to each other. The shape of the gap protects the glue against aggressive fuel.

Abstract: A self-securing ball-and-socket joint which has a ball head integrally formed on a rod, an outer structural part having a bore that pivotably receives the ball head and a radially elastic CIRCLIP brand retaining ring as well as a separate auxiliary assembly tool for the retaining ring. In the outer structural part beside the center of the ball head, there is a circumferential groove having a support face for the retaining ring. When the ball-and-socket joint is assembled, the retaining ring is first inserted into the circumferential groove. Then the auxiliary assembly tool is inserted into the bore. At its initial end the auxiliary assembly tool is embodied in the manner of a centering and expansion tool, so that it aligns the retaining ring with respect to the circumferential groove and finally forces it into this groove. Upon further displacement of the auxiliary assembly tool, the retaining ring snaps home into a detent notch provided on the circumference of the auxiliary assembly tool.

Abstract: To facilitate assembly and provide for high-level output from a deceleration sensor which provides, inherently, only very low level output, an evaluation circuit, such as an amplifier structure, is connected immediately adjacent the deceleration sensor on a common metal plate, interconnected thereby by bonding wires, the common plate having connecting pins (18) passing therethrough for connection to a standard plug-and-socket connector; the evaluation circuit and the deceleration sensor are enclosed within a common sealed housing, so that both the deceleration sensor (12, 12') as well as the evaluation circuit (16, 17) are sealed against ambient influences, preferably retained within a high-viscosity fluid, such as insulating oil.

Abstract: A method for controlling the operating characteristics of an internal combustion engine is disclosed. An injection signal for metering fuel and an idling charge signal for the supply of idling air are present. Engine overrun is also recognized in this method. To diminish the bucking ordinarily occurring during the transition to overrun, after the overrunning is recognized the supply of idling air is first reduced, and then the fuel metering to the engine is interrrupted. This affords the advantage that the transition to the overrun mode of operation occurs precisely at the time when the engine has the least possible torque. An analogous procedure is described for the resumption of normal operation following overrun.

Abstract: To provide for adaptive change of the operating characteristics of an engine, so that it will operate at its optimum effectiveness, just below the knocking limit, while reliably preventing knocking thereof, a computer receives engine data from respective sensors and a knock sensor (5), from which the computer calculates, based on data stored in a memory (3), operating parameters for the engine (1). The engine is, for example, an Otto-type internal combustion engine (ICE) or a Diesel engine. The operating characteristics, as computer-modified based on sensed knocking, and the modification data, are then placed into the memory to modify the basic memory content. Preferably, the memory has a basic memory content section and a programmable differential or modification section, in which algebraic constants or modifying factors are stored, based on actual experience of operation of the engine, just under the knocking limit.

Abstract: A headlight for dim head lamps of motor vehicles includes a paraboloid reflector which has a glowing spiral, and a transparent pane on the inner surface of which seven fields with differently acting optical means are provided. These fields reflect light rays emitted by the glowing spiral and reflected by predetermined zones of the reflector and form a dimming light.

Abstract: A device for monitoring operational condition of electrical consumers in a motor vehicle, particularly of heater plugs of a diesel engine, includes inductances connected in series between respective heater plugs and their d.c. supply. Alternating or pulsating current is supplied to a connection point of the inductances with the d.c. supply, and potentials across the inductances and the heater plugs are simultaneously evaluated to indicate a defective heater plug.

Abstract: A food processor wherein the tool in the bowl is rotated by a spindle, which is driven by an electric motor, through the medium of an insulating sleeve and an adapter which receives torque from the sleeve and transmits torque directly to the tool or through the medium of a tool carrier. The insulating sleeve, the spindle and an inner tubular portion of the adapter are surrounded by a tubular extension which is integral with the bottom wall and extends into the interior of the bowl. An outer tubular portion of the adapter has a coupling device which cooperates with the internal coupling device of a tool when the latter is placed around the outer tubular portion. A shank which extends upwardly from the outer tubular portion of the adapter can be centered at the underside of a cover for the bowl and can have an additional external coupling element which transmits torque to a tool or to the carrier. The selected tool or the carrier can but need not be removed from the bowl with the adapter.