Abstract: A displacement device for a throttle valve of an internal combustion engine in idling condition, has a housing, a diaphragm which is arranged in a chamber in the housing and is operatively connected to the throttle valve, a spring in the chamber, which spring acts with one end against the diaphragm, a vacuum connection to the one chamber, a connection for atmospheric pressure, a coil, and an armature which is axially displaceable in the coil, a valve body being firmly connected to the armature and keeping a connection for atmospheric pressure open or closed corresponding to its instantaneous position. A single connection for atmospheric pressure leads to the chamber and is kept open or closed by the valve body. The connection for vacuum is also kept open or closed by the valve body, the two connections being opened alternately. The valve body is acted on by the spring. The coil current is provided as control variable for the position of the throttle valve.

Abstract: A device for electrically measuring the oil level of a machine, particularly of an internal combustion engine, is connected with a device for temporarily blocking re-measurement. The device for the measurement of the oil level comprises a measurement probe (2) which is heated by a constant current during a connect time which is commenced in an automotive vehicle by a switch on a battery terminal (15). Furthermore, means are provided for comparing an initial voltage U.sub.O of the measurement probe at the start of the connect time with a measured voltage at the end of the connect time of a measurement period in order to form a result of the comparison which corresponds to the oil level. A signalling logic (7) which signals ranges of the oil level can be controlled by said result. The blocking-time transmitter, in combination with a control logic (10) for the total program control, blocks repeated measurement during at least one predetermined period of time after the machine is turned off or again turned on.

Abstract: A combination instrument, particularly for motor vehicles, which has an instrument holder (10) on which a plurality of display units can be mounted. The combination instrument also has a cover glass (5) which is arranged in front of the instrument holder (10) on the observer side and covers jointly all the display units. The display units can be mounted on the instrument holder (10) from the side facing away from the observer.

Abstract: A level measuring device for measuring the level of a liquid in a container. The device has an elongated support which extends approximately horizontally into the container and is fastened at a fastening end 6 to a wall 3 of the container while its other resting end 3 rests under initial spring pressure against the bottom 2 of the container. On the support there is fastened a carrier 12 on which a mechanical-electrical transducer is disposed and on which there is pivotally mounted a lever 13 which bears a float 14 and acts on the transducer. The support is developed as an elastic spring in the region between its fastening end 6 and the carrier 12.

Abstract: The present invention refers to a setting device for a feed device, particularly a throttle valve of an internal combustion engine with idling speed-of-rotation control in which the throttle valve, arranged in the intake pipe, is connected with a displacement rod and is pretensioned by a return spring. A first adjustable stop and a second fixed stop are provided for an actuating lever of the throttle valve, the second, fixed stop limiting the adjustment range of the first stop for a minimum opening of the throttle valve. An abutment member which is preferably developed as a lever cooperates with the two stops and is acted on by a mechanical reset means.

Abstract: A method of regulating the fuel/air ratio of an internal combustion engine, in which the output voltage of an oxygen measurement probe, located in the exhaust pipe of the engine, is used to regulate the fuel/air ratio in the manner that, upon a sudden change of the output voltage of the oxygen measurement probe, a signal jump takes place which is dependent on the direction of the sudden change, followed then by a change, which is substantilly continuous in time, of a correcting variable for the fuel/air ratio. Under substantially steady-state operating conditions the times of the jumps are controlled independently of the sudden changes in the output voltage of the oxygen measurement probe in the manner that the times between the jumps are smaller than the times between previous sudden changes in the output voltage of the oxygen measurement probe.

Abstract: By the fastening device, two electric transmitters are to be arranged on a supporting structural part from which two extensions (11) protrude spaced from each other. For this purpose, one bored attachment end (15, 16) each of the two transmitters are arranged each on one side (13, 14) of one of the two extensions (11) on a threaded bolt (1, 2). The threaded bolt is screwed, with one collar (5, 6) each lying on both sides against the extension (11), directly to the latter. The attachment ends each have such a large recess (20 22) that they rest only on the extension without resting on the collars (5, 6). The threaded bolt (1, 2) is provided on the outside on both ends with a threaded section (9, 10). Nuts (25, 26) which are screwed on the respective threaded sections press in each case one of the two attachment ends (15, 16) against the extension (11).

Abstract: In a system having an electronic controller for internal combustion engines, particularly injection engines in which the controller is functionally connected to a plurality of sensors and at least one actuator, the controller is part of an assembly which furthermore comprises a throttle-valve arrangement, an air-mass sensor and a throttle-valve position sensor. In systems with central injection, the injection valve can also be arranged within the assembly. By the compact structural unit thus obtained, cable connections are reduced to a minimum, so that, in their turn, reliability is increased and expense is saved. Furthermore, the arrangement facilitates maintenance and repair.

Abstract: A device is described for the electrical transmission of a mechanical variable, particularly an electric gas pedal for automotive vehicles. The device comprises a first potentiometer system as desired-value transmitter and a second potentiometer system as actual-value transmitter. At least one of the potentiometer systems has, in addition to the first wiper, a second wiper the wiper contact of which is at a predetermined fixed distance from the wiper contact of the first wiper and lies at a separate electric potential with respect to it.

Abstract: In an apparatus for measuring the velocity of flow of fluids, and particularly of the intake air of internal combustion engines, having an electrically heatable resistance layer which is applied in insulated manner on a support and is in thermal contact with the flowing fluid, the support is developed in rectangular shape with a flat central part bearing the resistance layer and is provided with reinforcement strips integral with it on at least three sides. Furthermore, the central part is provided at its edges with slits which adjoin the reinforcement strips. The apparatus of the invention can be produced preferably from silicon by etching and can be developed to receive further resistors and other electronic elements.

Abstract: A fastening device can be rapidly handled without tools for securing a module of electronic components within a housing. The device brings the module into thermally conductive contact with the housing to assure heat transfer for cooling the module. For this purpose there is proposed a hook-shaped lever which is pivoted on the module and is suspended on the housing. During a swinging movement, the lever moves the module initially parallel to a contact surface and thereupon towards it. The module is additionally supported on an outer support in the housing.

Abstract: A foil (15) has cutouts (17) which are bridged over by strips of solder (18, 19). The cutouts (17) are so dimensioned that the strips of solder (18, 19) can be placed transversely over the ends of conductive paths (9-14). The terminals (3-8) of the corresponding electronic component (2) are then placed on the strips of solder (18, 19). Pressure is exerted by means of a ram and heat applied, which leads to the melting of the strips of solder (18, 19) and thus to the soldering of the terminals (3-8) to the conductive paths (9-14).

Abstract: In a method for controlling the air-fuel ratio of an internal combustion engine in which the output voltage of an oxygen measurement probe which is arranged in the exhaust gas duct of the internal combustion engine is fed to a controller and the controller gives off a correcting variable for the air-fuel ratio, signals corresponding to the load and the speed of rotation of the internal combustion engine are furthermore fed to the controller. After each jump in the output voltage of the oxygen measurement probe there take place a first jump followed by, in each case, successive further jumps in the correcting variable. The direction of the jumps depends on the direction of the jump of the output voltage of the oxygen measurement probe while the amplitude of the further jumps is dependent on the load and the speed of rotation.

Abstract: In a circuit arrangement for the timed control of semiconductor switches (1-4) to each of which a freerunning diode (D1-D4) is connected in parallel and which are arranged in branches of a bridge, an ohmic-inductive load (5) of low loss power which lies in the diagonals of the bridge is to be acted on by a controlled average current value. For this purpose two semiconductor switches (for instance 1, 4) lying diagonally opposite each other in the bridge are closed in a current-application phase while in the following freerunning phase a freerunning current flows through the load. For the reduction of the loss power, at the start of the freerunning phase only one (1) of the two diagonally opposite semiconductors (1,4) is opened and a semiconductor switch (3) which lies in the bridge alongside the conductive semiconductor switch (4) is then closed.

Abstract: In an electric controlling member for the power-setting element of an internal combustion engine in which a clutch having an electromagnet is arranged between a drive device and the power-setting element of the engine. Upon the passage of current through said electromagnet, an armature is attracted against the force of a spring, the clutch being thereby closed. A switch is provided which can be actuated as a function of the distance between the electromagnet and the armature.

Abstract: A control system for an internal combustion engine comprises an electronic controller unit (3) which evaluates signals of a speed transmitter (8) and, upon reaching a predetermined maximum speed, displaces, via a controlling element (4), a displacement device (7) which is provided for the regulating of the engine output. In order to make the intermediate giving of gas possible even upon reaching the maximum speed and thus upon the downward regulation of the engine output, there is provided a neutral position recognition switch (10) which in the neutral position of the transmission (9) feeds a signal to the controller unit (3), which signal is so processed in a recognition circuit of said controller unit that the speed limitation is placed out of operation.

Abstract: In an electric desired-value transmitter for automotive vehicles, particularly as electric gas pedal, having an actuating element and a potentiometer the wiper of which is coupled to the actuating element, a switch which is also coupled with the actuating element is connected to a comparison device to which the output voltage of the desired-value transmitter and at leasst one comparison voltage are fed. When the actuating element is in that position in which the switch is actuated, the comparison device is preferably fed two comparison voltages, one of which lines somewhat below the value of the output voltage which is given off by the desired-value transmitter upon proper operation and the other of which lies somewhat above said value.

Abstract: In a solderable layer system in which a conductor layer which is partially covered with a layer of solder is applied to a support, the solder layer consists of an alloy in which a reducing agent is contained. The alloy is preferably brass.

Abstract: In a method and arrangement for controlling the fuel/air ratio of an internal combustion engine in which the output voltage of an oxygen measurement probe which is arranged in the exhaust pipe of the internal combustion engine is used, after comparison with threshold values, for regulating the fuel/air ratio, the threshold values can be controlled as a function of extreme values of the output voltage.

Abstract: A load setting device having a control element (11) which acts on a setting member (16) which determines the power of an internal combustion engine, which control element is connected to a driver (4) coupled to an accelerator pedal (1) and in addition can be moved by means of an electric actuator (9), having a desired-value detection element (7) associated with the driver (4), an actual-value detection element (12) cooperating with said desired-value detection element and acting on the electric actuator (9), the electric actuator (9) being controllable as a function of the detected values by an electronic control device (22). The driver (4) and the control element (11) are coupled by means of a coupling spring (13) and the control element (11) is urged in the direction towards a stop (14) of the driver (4).