Abstract: A method actuates a fuel injector having a coil drive with a solenoid and a magnet armature. The magnet armature can be moved along a longitudinal axis by a magnetic field generated by the solenoid. In the method, an amplification voltage is applied to the solenoid at a predefined point in time to move the magnet armature from a closed position into an open position. The amplification voltage is made available by a voltage-regulated direct voltage transformer from a supply voltage. The direct voltage transformer has a storage capacitor for supporting the voltage made available at the output of the direct voltage transformer. The storage capacitor is charged to a pilot control voltage by the amplification voltage before the given point in time, with the result that the voltage present at the solenoid is higher than the amplification voltage at the predefined point in time.

Abstract: A control device actuates at least one fuel injection valve with a high voltage and a comparatively lower voltage in temporally consecutive phases. The control device has supply connections for supplying energy from a motor vehicle battery. One of the connections is connected to vehicle ground. First output connections provide a positive first output voltage with respect to vehicle ground, the voltage being smaller than or equal to a hazard voltage of 60 volts of direct current according to TRBS2131. Second output connections provide a positive second output voltage with respect to vehicle ground, the voltage being greater than the hazard voltage and smaller than a sum of the first output voltage and the hazard voltage. The positive potentials of the first and second output voltages (U1, U2) are linked together.

Abstract: An apparatus with a circuit arrangement having four actuatable switching elements and three output connections for actuating two magnetic actuator coils. A first switching element is connected between a first supply voltage connection for a high potential of a supply voltage source and a first output connection. A second switching element is connected between the first supply voltage connection and a second output connection. A third switching element is connected between a third output connection and a second supply voltage connection for low potential of the supply voltage source. A fourth switching element is connected between the second output connection and the second supply voltage connection. A magnetic actuator arrangement is electrically connected to the circuit arrangement via lines and includes two magnetic actuator coils and three actuator connections.

Abstract: An apparatus with a circuit arrangement having four actuatable switching elements and three output connections for actuating two magnetic actuator coils. A first switching element is connected between a first supply voltage connection for a high potential of a supply voltage source and a first output connection. A second switching element is connected between the first supply voltage connection and a second output connection. A third switching element is connected between a third output connection and a second supply voltage connection for low potential of the supply voltage source. A fourth switching element is connected between the second output connection and the second supply voltage connection. A magnetic actuator arrangement is electrically connected to the circuit arrangement via lines and includes two magnetic actuator coils and three actuator connections.

Abstract: A control device actuates at least one fuel injection valve with a high voltage and a comparatively lower voltage in temporally consecutive phases. The control device has supply connections for supplying energy from a motor vehicle battery. One of the connections is connected to vehicle ground. First output connections provide a positive first output voltage with respect to vehicle ground, the voltage being smaller than or equal to a hazard voltage of 60 volts of direct current according to TRBS2131. Second output connections provide a positive second output voltage with respect to vehicle ground, the voltage being greater than the hazard voltage and smaller than a sum of the first output voltage and the hazard voltage. The positive potentials of the first and second output voltages (U1, U2) are linked together.

Abstract: A method for actuating an electromagnetic actuator device having a coil includes providing a plunger to be activated having at least one section movably disposed in the magnetic field, after activation of the plunger, reducing a voltage again by applying an electrical voltage to end the activation, and after an end of the electrical activation of the plunger, applying a magnetization voltage, which is not sufficient for an activation, to the coil for a predefined time period.

Abstract: A method actuates a fuel injector having a coil drive with a solenoid and a magnet armature. The magnet armature can be moved along a longitudinal axis by a magnetic field generated by the solenoid. In the method, an amplification voltage is applied to the solenoid at a predefined point in time to move the magnet armature from a closed position into an open position. The amplification voltage is made available by a voltage-regulated direct voltage transformer from a supply voltage. The direct voltage transformer has a storage capacitor for supporting the voltage made available at the output of the direct voltage transformer. The storage capacitor is charged to a pilot control voltage by the amplification voltage before the given point in time, with the result that the voltage present at the solenoid is higher than the amplification voltage at the predefined point in time.

Abstract: A method instructs a user how to operate of an appliance. The method issues information via at least one output device for instructing the user with regard to the operation of the appliance. The method also identifies a control element of the device, which is to be taken into account by the user during the instruction of the latter by use of at least one marker element. A device is provided for carrying out the method.

Abstract: An electrical household appliance, in particular, a ventilator hood, includes a voice operating unit having a microphone and a voice recognition unit disposed downstream of the latter. The voice operating unit is characterized by a data memory in which voice reference data stored as electronic data are present. The voice operating unit can be calibrated using the evaluation result based upon a comparison between voice data picked up by the microphone and the voice reference data. Also provided are methods for testing a voice operating unit and for initializing a voice operating unit in the appliance.

Abstract: A household appliance, in particular, a ventilator hood, includes a voice operating unit with a microphone and a sensor serving as a motion detector that switches on the microphone only during reception of a signal. Also provided is a method for operating the appliance and hood including the steps of detecting movement of a person or an object with a motion detector generating a signal when motion is detected, switching on a microphone for a prescribed period of time dependent upon the signal, analyzing voice signals detected by the microphone, and passing the detected voice signals to a voice evaluation unit only when a voice is detected and activating a function of the household appliance.

Abstract: A ventilator hood includes a voice operating unit with a microphone. The microphone is a spatially selective sound pickup.