Abstract: An actuating device for actuators, such as switching, throttle or swirl flaps, in internal combustion engines for motor vehicles comprises a shaft connected with an actuating motor. The shaft is connected with an actuator, such as a switching flap or the like. In a predetermined position relative to the shaft two pin-type magnets are arranged and preferably connected with a partly toothed gearwheel. When the shaft is rotated, the pin-type magnets move relative to a preferably fixed magnetic field sensor. The magnetic field sensor is a linear Hall sensor. Provision of a linear Hall sensor allows three different shaft positions to be determined. The positions are the two shaft positions defined by the pin-type magnets in which the magnets are arranged opposite the Hall sensor, and a position in which the location of the pin-type magnets does not allow the Hall sensor to detect a magnetic field. In the latter position the linear Hall sensor has a defined bridge voltage.

Abstract: An actuating device for actuators, such as switching, throttle or swirl flaps, in internal combustion engines for motor vehicles comprises a shaft connected with an actuating motor. The shaft is connected with an actuator, such as a switching flap or the like. In a predetermined position relative to the shaft two pin-type magnets are arranged and preferably connected with a partly toothed gearwheel. When the shaft is rotated, the pin-type magnets move relative to a preferably fixed magnetic field sensor. The magnetic field sensor is a linear Hall sensor. Provision of a linear Hall sensor allows three different shaft positions to be determined. The positions are the two shaft positions defined by the pin-type magnets in which the magnets are arranged opposite the Hall sensor, and a position in which the location of the pin-type magnets does not allow the Hall sensor to detect a magnetic field. In the latter position the linear Hall sensor has a defined bridge voltage.

Abstract: In a method for controlling a switching flap (10) arranged in an intake pipe connected with an internal-combustion engine the switching flap (10) is rotated with the aid of a switching-flap shaft (12) connected with an electromotor (18). With the aid of a position-detecting device (22,26;24,26) an end position of the switching flap (10) is detected. Subsequently, a rotation force is continued to be applied to the shaft (12) to hold the switching flap (10) in the end position. For detecting a breakage of the switching-flap shaft (12), an error message is generated when the switching-flap shaft (12) continues to rotate beyond the end position.

Abstract: The invention relates to a device for recognizing a shaft break of an actuated shaft made of plastic, in which a conductor is injected. This conductor extends essentially over the entire axial length of the shaft, whereby both its ends are connected to an electronics unit, so that upon a break of the shaft, and thus of the conductor, a current flow is interrupted and the conclusion can be drawn that the shaft has broken. According to the invention, the contacting of the conductor ends takes place via two electrically conductive rings arranged on the shaft, which rings in turn produce the contact to the electronics unit via carbon brushes arranged on sheet-metal springs.

Abstract: A level transmitter for liquid containers, particularly fuel store tanks, comprising a housing in which a contactless sensor is arranged which is connected with an evaluating unit and operatively connected with a magnet that moves relative to the sensor when a float arranged at a first end of a lever moves so that the change of the magnetic field acting upon the sensor is transformed into an electric signal so that an output signal corresponding to the level of the liquid in the container is obtainable by the evaluating means. The magnet is configured at least as a segment of an annular magnet that is arranged at a second end of the lever and integrated therein.

Abstract: In a method for controlling a switching flap (10) arranged in an intake pipe connected with an internal-combustion engine the switching flap (10) is rotated with the aid of a switching-flap shaft (12) connected with an electromotor (18). With the aid of a position-detecting means (22,26; 24,26) an end position of the switching flap (10) is detected. Subsequently, a rotation force is continued to be applied to the shaft (12) to hold the switching flap (10) in the end position. For detecting a breakage of the switching-flap shaft (12), an error message is generated when the switching-flap shaft (12) continues to rotate beyond the end position.

Abstract: The invention relates to an adjustment device (1) for an internal combustion engine, particularly for adjustment of shafts with adjusting members. Heretofore known open/close switches are relatively large and cost-intensive in their production. For this reason, an adjustment device (1) is proposed, in which a set of gears (5) simply comprising a worm (7) and a partial ring worm gear (8) wherein pin magnets are disposed on the partial ring worm gear. The pin magnets (11) work functionally together with a non-moving switch (16) disposed in a housing (2,3) when a signal is produced by means of the magnetic field of the magnets (11) passing by the switch (16), which stops motor (4) and, as the case may be, predetermines a direction change. Thus, a right/left movement of the motor (4), along with a timely turning off of the motor can be achieved with only one external control signal.

Abstract: The invention relates to a control device for a motor for adjusting a control unit. A motor (5) that serves for adjusting a control unit (20) is shut off in a known control device with at least one Hall switch, when the control unit (20) has achieved a desired position. In the aforementioned variant, it is proposed that the running direction of the motor (5) is determined by a signal (UH) obtained from such a Hall switch, and, if necessary, the motor (5) is prepared for reversal.

Abstract: A position sensor which is particularly suitable for the rotational angle detection of throttle or exhaust gas valves comprises a permanent magnet and at least two magnetic field sensors arranged adjacently to the permanent magnet. The magnetic field sensors are, for example, Hall sensors. By a relative movement between the permanent magnet and the magnetic field sensors, a position-dependent signal, for example in dependence on a rotational angle of the shaft, is produced. According to the invention, the two magnetic field sensors are arranged behind each other in field direction of the permanent magnet.

Abstract: The invention relates to an adjustment device (1) for an internal combustion engine, particularly for adjustment of shafts with adjusting members. Heretofore known open/close switches are relatively large and cost-intensive in their production. For this reason, an adjustment device (1) is proposed, in which a set of gears (5) simply comprising a worm (7) and a partial ring worm gear (8) wherein pin magnets are disposed on the partial ring worm gear. The pin magnets (11) work functionally together with a non-moving switch (16) disposed in a housing (2,3) when a signal is produced by means of the magnetic field of the magnets (11) passing by the switch (16), which stops motor (4) and, as the case may be, predetermines a direction change. Thus, a right/left movement of the motor (4), along with a timely turning off of the motor can be achieved with only one external control signal.

Abstract: The invention provides a level transmitter for liquid containers, particularly fuel store tanks, comprising a housing in which a contactless sensor is arranged which is connected with an evaluating unit and operatively connected with a magnet that moves relative to the sensor when a float arranged at a first end of a lever moves so that the change of the magnetic field acting upon the sensor is transformed into an electric signal so that an output signal corresponding to the level of the liquid in the container is obtainable by the evaluating means. It is characterized in that the magnet (5) is configured at least as a segment of an annular magnet (5) that is arranged at a second end of the lever (3) and integrated therein.

Abstract: A fluid level indicator for a fluid container of a motor vehicle, including a housing having at least one opening through which a fluid may flow; a float disposed to move in the housing; and a first magnet integrated with the float; wherein the first magnet is functionally connected to a first non-contact sensor integrated into the housing; and wherein the float carries out a translational motion relative to the housing when fluid flows into or out of the at least one opening.

Abstract: The invention relates to a control device for a motor for adjusting a control unit. A motor (5) that serves for adjusting a control unit (20) is shut off in a known control device with at least one Hall switch, when the control unit (20) has achieved a desired position. In the aforementioned variant, it is proposed that the running direction of the motor (5) is determined by a signal (UH) obtained from such a Hall switch, and, if necessary, the motor (5) is prepared for reversal.

Abstract: A position sensor which is particularly suitable for the rotational angle detection of throttle or exhaust gas valves comprises a permanent magnet and at least two magnetic field sensors arranged adjacently to the permanent magnet. The magnetic field sensors are, for example, Hall sensors. By a relative movement between the permanent magnet and the magnetic field sensors, a position-dependent signal, for example in dependence on a rotational angle of the shaft, is produced. According to the invention, the two magnetic field sensors are arranged behind each other in field direction of the permanent magnet.

Abstract: A fuel delivery unit for a motor vehicle is disclosed. The fuel delivery unit has a fuel pump (5) which is clamped in between a retaining part (1) and an elastically configured pump-retaining means (6) which is clipped on the retaining part (1). The retaining part (1) is open toward one side, so that the fuel pump (5) can be fitted once the delivery unit has been preassembled. It is thus possible to replace the fuel pump (5) in the case of a defect.

Abstract: A measuring device for determining the position of a control element, such as a throttle valve in which a temperature-resistant Hal sensor (4) cooperates with a permanent magnet (2), which is connected to the control element by a spindle (3), in order to obviate the need for a conventional mechanical potentiometer. By virtue of the Hall effect, the Hall sensor (4) produces during movement of the control element and thus of the position of the permanent magnet (2) relative to the Hall sensor (4), an output signal (Ua) that is preferably linearly proportional to the movement of the control element. The Hall sensor (4) is programmed to correct temperature, related measurement errors in the permanent magnet.

Abstract: The invention relates to a system for the production of powders from metals. This system has a melting chamber (2) and a powder container (3) separated herefrom. In the melting chamber a metal rod (15) is melted through the high-frequency field of a coil (10) with differently dimensioned windings. The melted metal (28) penetrates through an opening (6) into the powder container (3) wherein it is pulverized in the region of the opening (6) due to different pressures in the melting chamber (2) and powder container (3) as well as by means of a dispersion system (5).

Abstract: For the remelting of titanium or zirconium, the electroslag remelting method is used. To prevent any reaction of the melt with oxygen or nitrogen, the remelting is performed in an inert gas atmosphere. Fluorspar with an addition of calcium oxide is used as the slag forming substance. This calcium oxide dissolves in the fluorspar and reacts with oxygen, nitrogen and hydrogen in the titanium, so that the reactive metal is purified of these substances.