Abstract: A method and a corresponding system for detecting a malfunction in an electric drive unit. The method comprises the following steps: ascertain (S17) a current flow characteristic (1) of an electric drive unit; detect (S33) a gradient change in the current flow characteristic (1) at a first point in time (t=n); compare (S35, S39) the gradient change with a predefinable gradient change range; establish (S45) a malfunction in the electric drive unit if the gradient change is outside the predefinable gradient change range.

Abstract: The invention relates to a system (1) and to a corresponding method for tank leakage diagnosis. The system (1) comprises a fuel tank (3), a pressure source (5, 9), and a pressure sensor (7). The pressure source (5, 9) is configured to increase the pressure in the fuel tank (3). The pressure sensor (7) is configured to detect the pressure progression at the fuel tank (3). The system (1) is configured to seal the fuel tank (3) in a gas-tight manner such that the fuel tank (3) can be used as a pressure store. Furthermore, the system (1) is configured to conclude, independently of a current operation of the pressure source (5, 9) based on the determined pressure progression at the fuel tank (3), that a leak is present.

Abstract: The invention relates to a system (1) and to a corresponding method for tank leakage diagnosis. The system (1) comprises a fuel tank (3), a pressure source (5, 9), and a pressure sensor (7). The pressure source (5, 9) is configured to increase the pressure in the fuel tank (3). The pressure sensor (7) is configured to detect the pressure progression at the fuel tank (3). The system (1) is configured to seal the fuel tank (3) in a gas-tight manner such that the fuel tank (3) can be used as a pressure store. Furthermore, the system (1) is configured to conclude, independently of a current operation of the pressure source (5, 9) based on the determined pressure progression at the fuel tank (3), that a leak is present.

Abstract: A method and a corresponding system for detecting a malfunction in an electric drive unit. The method comprises the following steps: ascertain (S17) a current flow characteristic (1) of an electric drive unit; detect (S33) a gradient change in the current flow characteristic (1) at a first point in time (t=n); compare (S35, S39) the gradient change with a predefinable gradient change range; establish (S45) a malfunction in the electric drive unit if the gradient change is outside the predefinable gradient change range.

Abstract: The present invention relates to a weld-on fastener for an electrical contact with a weld nut (1) which, on its topside has an electric contact face (9) and, on its bottom side, has an annular axial projection (6) which surrounds a cavity (4) of a pre-determinable depth (T), and with a screw (3) screwed into the weld nut (1), which screw (3) also has an electric contact face (9), a spacer ring (2) being clamped between the contact faces (9). The spacer ring (2) preferably has a thickness (D) which is approximately equal to the depth (T) of the cavity (4). When the spacer ring (2) is clamped in, the screw (3) ends approximately flush with the end of the internal thread (12) of the weld nut (1). This combination is distinctive in that it has only a low overall height, no metal scabs reach the thread (12) during welding-on, the contact faces (9) are protected during assembly and the welded connection can absorb high torques even when welding onto thin work pieces (7).

Abstract: The present invention relates to a weld-on fastener for an electrical contact with a weld nut (1) which, on its topside has an electric contact face (9) and, on its bottom side, has an annular axial projection (6) which surrounds a cavity (4) of a pre-determinable depth (T), and with a screw (3) screwed into the weld nut (1), which screw (3) also has an electric contact face (9), a spacer ring (2) being clamped between the contact faces (9). The spacer ring (2) preferably has a thickness (D) which is approximately equal to the depth (T) of the cavity (4). When the spacer ring (2) is clamped in, the screw (3) ends approximately flush with the end of the internal thread (12) of the weld nut (1). This combination is distinctive in that it has only a low overall height, no metal scabs reach the thread (12) during welding-on, the contact faces (9) are protected during assembly and the welded connection can absorb high torques even when welding onto thin work pieces (7).

Abstract: A welding device includes a holder for a weld part (1) adapted to be moved substantially perpendicularly to, and away from, a surface of a workpiece (2) on which the weld part (1) is to be welded. An arc producing system produces an arc between the weld part (1) and the surface of the workpiece (2) with the arc generating a magnetic flux. A field former (3) includes a low-retentivity steel and provides a flux path for the magnetic flux generated by the arc.

Abstract: A process and apparatus for welding a metal component to a metal workpiece. The component typically comprises a metal weld region and a threaded connector region and the apparatus includes a weld head comprising a nozzle for holding the weld region of the component adjacent the workpiece. The weld head induces a weld arc between the weld region of the component and the workpiece to create a weld pool of molten material. The weld head subsequently moves the weld region into the weld pool to permanently join the component to the workpiece. The apparatus further comprises a pressurized fluid source and a fluid flow control means for directing the pressurized fluid between the weld head and the component an weld pool so as to deflect any airborne fluid residue of the weld pool away from the connector region of the component.

Abstract: A welding device includes a holder for a weld part (1) adapted to be moved substantially perpendicularly to, and away from, a surface of a workpiece (2) on which the weld part (1) is to be welded. An arc producing system produces an arc between the weld part (1) and the surface of the workpiece (2) with the arc generating a magnetic flux. A field former (3) includes a low-retentivity steel and provides a flux path for the magnetic flux generated by the arc.

Abstract: A method and a device for decontaminating interior spaces are proposed. It is provided here that a base station and at least one mobile subunit are provided, the base station comprising a supply of decontamination agent and fuel and the subunit comprising decontamination equipment and a tank for ready-to-use decontamination agent, that the subunit is supplied with decontamination agent and with fuel at the base station and then transported to the item requiring decontamination of its interior space, the decontamination of the interior space is carried out and subsequently the subunit is returned to the base station to be re-supplied there with decontamination agent and fuel. Also proposed is a device with an off-road, automotive undercarriage with a drive motor, a storage tank for a decontamination liquid and a receiving tank for used decontamination liquid as well as a spray-extraction device for decontaminating the interior surface and with a generator for supplying power.

Abstract: A process and apparatus for welding a metal component (28) to a metal workpiece (40). The component (28) typically comprises a metal weld region (36) and a threaded connector region and the apparatus includes a weld head comprising a nozzle (8) for holding the weld region (36) of the component (28) adjacent the workpiece (40). The weld head induces a weld arc between the weld region (36) of the component (28) and the workpiece (40) to create a weld pool of molten material. The weld head subsequently moves the weld region into the weld pool to permanently join the component (28) to the workpiece (40). The apparatus further comprises a pressurised fluid source and a fluid flow control means for directing the pressurised fluid between the weld head and the component and weld pool so as to deflect any airborne fluid residue of the weld pool away from the connector region of the component (28).

Abstract: A method and a device for decontaminating interior spaces are proposed. It is provided here that a base station and at least one mobile subunit are provided, the base station comprising a supply of decontamination agent and fuel and the subunit comprising decontamination equipment and a tank for ready-to-use decontamination agent, that the subunit is supplied with decontamination agent and with fuel at the base station and then transported to the item requiring decontamination of its interior space, the decontamination of the interior space is carried out and subsequently the subunit is returned to the base station to be re-supplied there with decontamination agent and fuel. Also proposed is a device with an off-road, automotive undercarriage with a drive motor, a storage tank for a decontamination liquid and a receiving tank for used decontamination liquid as well as a spray-extraction device for decontaminating the interior surface and with a generator for supplying power.

Abstract: An electric welding device for welding a fastening element (4) having a through-duct (17) on a workpiece is proposed. The welding device comprises a conveying and holding system (1) having a guide member (2) with a guide duct (3). The fastening element (4) is supplied to the guide duct and is held in one of its ends during the welding process. Within the guide duct there is arranged a loading member (6) which is capable of moving to and fro in the longitudinal direction thereof and has a head (7) which can be brought to rest on the fastening element (4). The loading member has a duct (9) with an inlet (10) and an outlet (11) formed on the head (7). A gas supply duct (12) opens into the guide duct (3). The loading member (6) closes the gas supply duct (12) in a first position. In a second position, the loading member (6) connects the inlet (11) to the gas supply duct (12) so a gas flows to the welding position during the welding process.

Abstract: The invention relates to a method of welding weld studs to a workpiece, in particular of aluminum in each case, by the stroke ignition method, in which the stroke height(s) of the weld stud (1) is altered as a function of the measured arc voltage and optionally of the arc firing time. In particular, the stroke height(s) of the stud (1) can be increased during the occurrence of short circuits, i.e. during a sudden drop in the arc voltage, preferably in predetermined steps. The weld stud is immersed into a pool of melt after a predetermined period of time of between 5 and 10 ms after the welding current has been switched off. The polarity of the stud or of the workpiece is changed at least once during the welding process. The welding current is interrupted for a predetermined period of time for this purpose. The method leads to an improved, readily reproducible quality of weld.

Abstract: In an apparatus for treating an article comprising a treatment bridge with a head beam which is arranged above the article and two side beams which are arranged at the sides of the article and extend transversely to the head beam, and delivery devices which are arranged on the beams for respectively directing at least one treating agent at the article, in order to improve the transportability of the bridge, it is proposed that the side beams of the bridge be pivotable from a working position in which they stand transversely to the head beam to a resting position in which they are arranged parallel to the head beam.