Abstract: Tubing for a liquid medium that is to be conditioned, including an inner tube for the liquid-medium that is to be conditioned encompassed by an outer tube, parallel to the inner tube. An outermost tube surrounds the outer tube. At least one duct for the liquid conditioning medium, is disposed between the inner tube and the outer tube and at least one duct for the liquid conditioning medium is disposed between the outer tube and the outermost tube. A redirecting region connects the ducts between the inner tube and outer tube and the outer tube and the outermost tube. The inner tube and the outer tube consist of thermoplastic plastics, and the unit, consisting of the inner tube and the outer tube, is produced by co-extrusion.

Abstract: A welding method, in particular a tack welding method for connecting two components, preferably two components of a fuel system, wherein the regions, of the two components that are to be connected to one another are each heated, and each at least partially melted with a first energy pulse. The partially melted, regions of the two components are connected to one another through the formation of a welding seam. Preferably, after the hardening of the welding seam, a further energy pulse is directed onto the welding seam, with the stipulation that only a midsection of the welding seam is again melted.

Abstract: Tubing for a liquid medium that is to be conditioned, in particular for a carbamide solution that is to be conditioned, wherein an inner tube is provided for the liquid medium that is to be conditioned, or for a liquid conditioning medium. The inner tube is encompassed by an outer tube, and runs parallel, or substantially parallel to the outer tube. At least one duct for the liquid conditioning medium, or for the liquid medium that is to be conditioned, is disposed between the inner tube and the outer tube. The inner tube and the outer tube consist of thermoplastic plastics, and the unit, consisting of the inner tube and the outer tube, is produced by means of co-extrusion.

Abstract: A pipe connection arrangement for the connection of pipelines, in particular of motor vehicle pipelines to a connection element, wherein a connection fitting is provided which encompasses the pipeline to be connected in the region of one of its pipeline ends and which, with a front side press surface of a of a rear side surface facing a flange connected to the pipeline end.

Abstract: The invention relates to a fan blower (18) for a heating/air conditioning system, in particular for a motor vehicle, with an impeller (22) and a motor (24) that drives this impeller (22).

Abstract: The invention relates to a climate control system for the interior of a motor vehicle, having a blower regulator, heating control unit or brushless blower motor, as well as function components such as operating elements, sensors, clocking valves and adjusting drive mechanisms, which are connected to one another and to the vehicle battery via connecting lines and to which the information required to operate the blower regulator, heating control unit or brushless blower motor are transmitted.

Abstract: A power MOS transistor having a PMT chip located in a transistor housing in which the temperature of the transistor barrier junction is monitored is described. Protection of the PMT chip against overload and permanent damage is guaranteed without negatively affecting its switching function in that a protective circuit is provided in the transistor housing which directly measures the temperature of the transistor barrier junction using a temperature measuring element, and when a predefined or predefinable limit barrier junction temperature is reached reduces the drain current and thus the power loss of the PMT chip, the temperature measuring element being integrated in the PMT chip or accommodated in the transistor housing together with the protective circuit as an additional chip.

Abstract: A display gauge in which an electroluminescent display is arranged between a dial face and a support plate, the electroluminescent display being connected to electrical components arranged on the back side of the support plate.

Abstract: To prevent change of data in a non-volatile programmable, ready-only memory (25) forming, together with a microprocessor (23) a control unit, for example for an automotive vehicle, while permitting programming of the memory from an external programming unit (P, 1), an interface (3, 11, 12) is provided through which a release-enable bus (13) also passes, data being transmitted in accordance with a predetermined characteristic--even or odd parity--, the parity correctness being checked. If the parity is correct, an "enter" signal is provided on the release-enable bus for storing the data; if not, retransmission is attempted for a predetermined number of time, and if it cannot be correctly effected, a malfunction indication output signal is generated.