Abstract: A temperature sensor is described having a measuring resistor, a printed circuit board onto which the measuring resistor is soldered, a cover plate which is fastened onto the printed circuit board, the cover plate having a recess in which the measuring resistor sits.

Abstract: This document describes a heating rod for a glow plug with a ceramic glow element having a glow tip at its front end and a connector portion at its rear end, a contact element making electrical contact with the connector portion of the glow element, and a sheath, from which the front end of the glow element protrudes. According to this disclosure, the contact element is pressed against the glow element under pre-tension. Furthermore, this document describes a method for producing such a heating rod and a glow plug with such a heating rod.

Abstract: A continuous-flow heater is described, with a housing made from an aluminium-based alloy, in which a flow channel for a fluid to be heated extends from an inlet to an outlet, and a heating plate which is arranged in the housing, with a substrate made from steel, which carries heating conductor tracks, a frame embedded in a wall of the housing, wherein the heating plate forms one wall of the flow channel in the housing, and is welded to the frame.

Abstract: A method is described for the assembly of a magnetic core for a transformer, with the following steps: Cutting sheet metal blanks from transformer sheet, stacking the sheet metal blanks to form magnetic core segments, placing a permanent magnet at one of the magnetic core segments so that the latter is magnetized by the permanent magnet, formation of the magnetic core by placing the remaining magnetic core segments against the permanent magnet, or against a magnetic core segment already magnetized by the permanent magnet. A magnetic core is also disclosed.

Abstract: An ignition coil is described for an internal combustion engine, with a housing, a transformer, which is arranged in an interior space of the housing, and potting compound, with which the interior space of the housing is cast. In accordance with this disclosure provision is made for the transformer to be covered by a mat, which is embedded in the potting compound.

Abstract: A primary coil former for an ignition coil has a winding carrier surface configured for a primary coil wound thereon. Two primary winding stops limit the winding carrier surface at first and second axial ends of the carrier surface, respectively. Two holders are formed at the first axial end, each configured for holding one end of a winding wire. Two deflection domes are formed at the second axial end, one of the domes configured for guiding a winding wire back to the winding carrier surface for a clockwise winding and the other dome configured for guiding a winding wire back to the winding carrier surface for a counterclockwise winding. A groove in the winding carrier surface receives a winding wire which leads from one of the ends of the winding carrier surface up to a gap between the two deflection domes at the opposite end of the winding carrier surface.

Abstract: Described is a liquid heater having a housing, in which a flow channel runs from an inlet to an outlet, a heating resistor arranged within the housing for heating liquid flowing through the flow channel, control electronics which are arranged in an interior space of the housing, the interior space being sealed off from the flow channel, and a plug connector attached to the housing. Provided according to this disclosure, the plug connector has a vent duct which is closed by a membrane and which leads to the interior space sealed against the ingress of liquid, in which interior space the control electronics are arranged.

Abstract: What is described is a mounting aid for mounting electrical components, in particular electrolytic capacitors or chokes, on a printed circuit board, said mounting aid comprising a body, which has compartments for receiving the electrical components, wherein the compartments have a base with openings for the insertion of connection wires of the electrical components, and metal parts fastened to the body, which metal parts each form at least one contact pin on the underside of the body and each from a busbar for connection to electrical components in a plurality of compartments of the body.

Abstract: Disclosed is a heating device comprising a plate-shaped ceramic PTC resistor having a thickness, a front side, a back side and narrow sides, wherein the distance from the front side to the back side equals the thickness, and a first contact element and a second contact element, which are electrically contacting the PTC resistor. The PTC resistor is electrically contacted by the contact elements on opposite narrow sides.

Abstract: Described is a method for regulating the temperature of a glow plug of an internal combustion engine, wherein a target resistance is determined from a target temperature by means of a resistance temperature characteristic of the glow plug and the actual resistance of the glow plug is regulated to the target resistance, the glow plug is heated to determine the resistance temperature characteristic of the glow plug, and thereby determining a resistance gradient and an electrical resistance of the glow plug is measured before the heating or at a defined time during the heating, using both the measured resistance and the resistance gradient, the resistance temperature characteristic is determined.

Abstract: A method is described for determining the resistance temperature characteristic of a ceramic glow plug, wherein the glow plug is heated at a specified power, wherein before the heating it is first determined whether the glow plug is an aged glow plug, and then, if the glow plug has not been detected as an aged glow plug, the glow plug is heated at a first specified power and the resistance value thereby achieved is assigned to a temperature that is anticipated to be the final temperature when heating a factory-outlet glow plug at this first power, or if the glow plug has been detected as an aged glow plug, the glow plug is heated at a reduced power which is smaller than the first power, and the resistance value achieved thereby is assigned to the same temperature that is also anticipated when heating a factory-outlet glow plug at the first power.

Abstract: Disclosed is a heating rod comprising a ceramic heating element, a strip shaped contact sheet, and a housing in which the heating element and the contact sheet are arranged. The contact sheet is coated with nickel.

Abstract: An inventive ignition coil has a transformer that includes a primary coil, a secondary coil and a core formed from stacked metal sheets. A plastic frame holds the sheets. A housing surrounds an interior in which the transformer is arranged and the interior is sealed with an electrically insulating casting compound. The housing comprises an interior wall bounding bounds a compartment in which a part of the core is arranged, the part of the core being outside the primary coil and the secondary coil.

Abstract: A method for detecting glow plug replacement or an aging glow plug. The glow plugs are heated and monitored. When a threshold value is reached for a first glow plug, a first value of a temperature-dependent variable is measured for all other glow plugs and is stored as reference values associated with the first glow plug. This process is repeated until reference values associated with each glow plug have been determined and stored for each glow plug. The process is repeated to determine a set of comparative values. The comparative values are compared with the reference values. A deviation of a comparative from a reference value of less than a specified tolerance value is considered an agreement. The inventive process concludes which of the glow plugs of the engine are unaltered and which have a resistance-temperature characteristic that has been altered to an extent indicating replacement, aging or a defect.

Abstract: A heating rod having a plurality of ceramic heating elements, a first strip-shaped contact sheet, a second strip-shaped contact sheet, and a housing in which the plurality of heating elements and the contact sheets are arranged. The first contact sheet electrically contacts only a part of the plurality of the heating elements, and the second contact sheet electronically contacts a second part of the plurality of the heating elements.

Abstract: An electric heating device for heating fluids, comprising a housing, inlet and outlet connection pieces arranged at inlet and outlet openings of the housing, respectively, a flow path in the housing through which the fluid to be heated flows leading from the inlet connection piece to the outlet connection piece, and an electric heating unit attached to the housing. The flow path comprises inlet and outlet chambers and at least two flow channels running side by side from the inlet to the outlet chambers. A separating wall separates two flow channels from one another. Each flow channel has an inlet section connected to the inlet chamber and defining an inlet flow direction and an outlet section connected to the outlet chamber and defining an outlet flow direction. The inlet connection piece is oriented in the inlet flow direction and/or the outlet connection piece is oriented in the outlet flow direction.

Abstract: A method for determining a need for changing a spark plug of a combustion engine, comprising the following steps: monitoring a current flowing through the spark plug, analyzing the current and thereby determine a time interval that is indicative for the time between application of a voltage to the spark plug and formation of an arc discharge between electrodes of the spark plug, creating a signal indicative of the need to change the spark plug if the duration of the determined time interval is outside predefined bounds.

Abstract: Flow heater comprising a housing having an inlet and an outlet, a plate shaped heating insert that is arranged in the housing and defines a flow path from the inlet to the outlet. According to this disclosure the plate shaped heating insert comprises a first heating plate, a second heating plate, and a plate support arranged between the first heating plate and the second heating plate, wherein the first heating plate and the second heating plate are arranged on opposite sides of the plate support, and the first heating plate and the second heating plate each comprise a substrate plate carrying a resistive layer.

Abstract: This disclosure relates to a fluid friction clutch having a housing, a clutch disc which is arranged at one end of a shaft which is mounted within the housing, a working chamber which is configured between the housing and the clutch disc, a storage chamber for clutch fluid, and at least one feed duct which leads from the storage chamber to the working chamber. Moreover, a pressure relief device for discharging clutch fluid from the feed duct into the storage chamber is provided.

Abstract: Described is an exhaust-gas switch, in particular for trucks, having a housing that has an inlet, a first outlet and a second outlet, having a shaft led out from the housing, and having a valve flap arranged in the housing that is pivotable about a geometric pivot axis by means of the shaft between a first position and a second position, the valve flap having a blocking portion that in the first position blocks the first outlet and in the second position blocks the second outlet. According to this disclosure, provision is made such that the valve flap bears a counterweight to the blocking portion, the geometric pivot axis being arranged between the blocking portion and the counterweight.