Abstract: A method for regulating the surface temperature of a glow plug is described, wherein the electrical resistance of the glow plug is continuously measured and used to regulate the surface temperature of the glow plug to a target temperature or a target resistance corresponding to the target temperature by means of a resistance temperature characteristic. According to this disclosure, it is provided that the resistance temperature characteristic used for the temperature regulation is adjusted as a function of the present motor operating state.

Abstract: Described is a pressure measuring glow plug with a housing, a glow pin, which projects out of the housing and can be displaced in its longitudinal direction relative to the housing against a restoring force. A sensor acquires the position of the glow pin or a pressure acting on the glow pin, and a center pole is arranged in the housing and electrically connected to the glow pin via a contact spring. This disclosure provides that the contact spring is a U-shaped, bent metal strip, which in a middle section has a reduced width, and broadens from the middle section toward its two ends.

Abstract: Described is a glow plug having a casing and a ceramic glow pin protruding out of the casing. The glow pin has a tapered end section inside the casing. A metal protective tube protrudes out of the casing and surrounds the glow pin. The protective tube has a widened end section inside the casing. A center electrode is arranged in the casing and electrically connected to the glow pin. The glow plug includes an annular or sleeve-shaped contact element through which the glow pin projects and to which the tapered end section of the glow pin is soldered. The contact element is at least partly surrounded by the widened end section of the protective tube.

Abstract: A thermal fuse for an electrical circuit is described, with a contact arm by way of which two electrical conductors are electrically conductively connected to each other, wherein the connection of the contact arm to at least one of the two conductors is a soldered joint, which loses its strength when a activation temperature of the fuse is reached. In accordance with this disclosure a permanent magnet is provided, which generates a magnetic force, which lifts the contact arm from at least one of the two conductors as soon as the soldered joint loses its strength.

Abstract: Described is an ignition coil comprising a housing, in which a transformer is arranged, and a plug connector, wherein the plug connector has a high voltage contact, which is connected to the secondary side of the transformer by means of a wire, which resiliently presses against an electrical contact surface. The contact surface is concavely shaped.

Abstract: A connector plug is described for connecting an ignition coil to a spark plug, comprising an electrical conductor, which has a first end for contacting the ignition coil and a second end for contacting the spark plug, and a protective tube, which surrounds the electrical conductor. In accordance with this disclosure it is proposed that the protective tube has a predetermined bending point with a reduced bending stiffness.

Abstract: A method for operating an ignition coil is described, wherein a secondary voltage pulse is generated by feeding a primary voltage pulse into a transformer of the ignition coil, and a primary current, a primary voltage, a secondary current and/or a secondary voltage are measured, wherein the course of the primary current, the primary voltage, the secondary voltage and/or the secondary current are monitored and, when a malfunction is determined during subsequent primary voltage pulse, an error signal is generated which indicates that a malfunction has occurred during the previous primary voltage pulse and classifies the malfunction. In addition, a corresponding ignition coil is described.

Abstract: Described is a supply circuit for a corona ignition device, with an input for connection to a direct voltage source, a first converter, a second converter, and an output for connecting a load. The two converters each generate an output voltage, which is provided on its secondary side and exceeds the input voltage. The two converters each contain a transformer that galvanically separates the primary side of the converter from its secondary side. At least one transistor switch is arranged between the input and primary side of the two converters for pulse width-modulation of the input voltage.

Abstract: This disclosure pertains to a protective sleeve for protecting a corona igniter in a spark plug shaft of an internal combustion engine, wherein the protective sleeve comprises a collar for sitting on a rim of a spark plug shaft opening and a tubular section for being inserted into the spark plug shaft and for receiving the corona igniter.

Abstract: A glow plug is described, having a body, a glow pin which protrudes from a first end of the body, and an inner pole which protrudes from a second end of the body and is electrically connected to the glow pin. A section of the inner pole that protrudes out of the body has an embossed structure for improving the mechanical and electrical connection to a plug connector. A method for producing a glow plug is also disclosed.

Abstract: The invention relates to a vehicle heater, comprising at least one pipe, which has a plurality of chambers, ceramic heating elements, which are arranged in the chambers, and contact plates, which rest against the heating elements in the chambers via a front side and face an upper side or underside of the chamber via a rear side, wherein at least two chambers of the pipe are separated by an intermediate wall, which runs from the upper side to the underside of these two chambers. The contact plates have a slit, in which the intermediate wall is arranged.

Abstract: This disclosure pertains to a control device for the coolant flow in a cooling circuit of an internal combustion engine with the following characteristics: a housing with an inlet opening, an outlet opening and a movable control element for varying the flow-through cross section of the channel; an annular seal arrangement comprising a sealing frame and a sealing ring is seated between a sealing surface of the housing and a sealing surface of the control element. According to this disclosure, it is proposed that the sealing ring rests against a plane sealing surface of the housing in a sealing fashion and meets this plane sealing surface along a contact line that encloses a first surface area. Depending on the flow direction through the seal arrangement, the sealing ring features a surface section that has a defined circumference referred to the length of the contact line between the sealing ring and the housing.

Abstract: A corona ignition device is described, with a central electrode, an insulator, in which the central electrode sits, a coil, which is connected to the central electrode, a metal housing, which holds the insulator and surrounds the coil, and a cover, which closes the metal housing at its end facing away from the insulator. According to this disclosure, provision is made for a spring arranged between the cover and the coil. In another aspect, a shield is provided that surrounds the housing and comprises several shell elements which each surround a section of the circumference of the coil.

Abstract: A method for controlling the temperature of glow plugs of a combustion engine is described, wherein all glow plugs are heated up for an engine start by the input of electrical energy according to a profile which is uniformly specified for all glow plugs of the engine, a change in resistance ?R is ascertained for each of the glow plugs for at least one specified time span, and a target resistance value is calculated for each glow plug from the associated change in resistance ?R, this value being expected for the glow plug when it has reached its target temperature, and the target resistance value is used to control the temperature of the glow plug to the target temperature.

Abstract: Described is an ignition coil for an internal combustion engine having a housing with a plug connector, wherein the plug connector has an elastomeric cap slid onto a tubular housing section that surrounds a terminal contact. This disclosure provides that the terminal contact is surrounded by a circumferential slot, in which an inner edge of the cap sits.

Abstract: This disclosure relates to a corona ignition device having a coil, which has an elongate coil body and a coil winding wound onto the coil body, an ignition electrode connected to the coil, and an insulator, inside which the ignition electrode is situated. According to the present disclosure, the coil body has a hollow section.

Abstract: What is described is a connection element for fastening a metal part to a printed circuit board, wherein the connection element has a first portion, which is formed as a press-fit pin to be pressed into a bore of the printed circuit board, and a second portion, which is formed as a screw to be screwed into the metal part.

Abstract: A corona ignition system is described for igniting fuel in a combustion chamber of an internal combustion engine, with a resonant circuit, which contains an ignition electrode, a high frequency generator connected to the resonant circuit, in order to generate an AC voltage for exciting the resonant circuit, and a direct current voltage source, in order to generate an input voltage for the high frequency generator. According to this disclosure, provision is made that parallel to the direct current voltage source a capacitor is connected to the high frequency generator, which capacitor on transient oscillation of the resonant circuit compensates mismatches between the resonant circuit and the direct current voltage source.

Abstract: Methods for producing a glow plug having a housing, a ceramic glow pin and a protective tube from which a section of the glow pin projects which is thinner than a thicker section arranged in the protective tube. The thinner section leads to a glow tip. The glow pin is inserted into the protective tube and the protective tube is inserted into the housing. A securing element is placed onto the first end of the glow pin. The internal diameter of the securing element is smaller than the maximum diameter of the glow pin. The securing element is fastened on the protective tube. Alternatively, the protective tube is heated locally at a section of the protective tube surrounding the thinner section, and there the interior width of the protective tube is reduced to a value smaller than the diameter of the thicker section of the glow pin.

Abstract: This disclosure refers to an electrical heating device comprising a heating rod, and heat sinks which are held between opposing flanges of the heating rod. The heat sinks are clamped by the flanges pressing laterally against the heat sinks.