Abstract: A method for actuating a spark plug, in which the spark plug is assigned a first ignition coil and second ignition coil.

Abstract: The invention relates to a corona ignition device, comprising a center electrode, an insulator surrounding the center electrode, a coil, which is connected to the center electrode, and a housing pipe, in which the coil is arranged. The housing pipe comprises a substrate layer and a conducting layer arranged radially inwardly of the substrate layer. The conducting layer is made of a material having a greater electrical conductivity than the material of the substrate layer. The conducting layer has a thickness of at least 0.1 mm. Also disclosed is a method for producing a corona ignition device, in which, to produce the housing pipe, an inner pipe is inserted into an outer pipe. The invention also relates to a corona ignition device of which the coil is surrounded by a soft-magnetic shielding.

Abstract: A method for actuating a spark plug, in which the spark plug is assigned a first ignition coil and second ignition coil.

Abstract: A method for actuating a spark plug, in which the spark plug is assigned a first ignition coil and second ignition coil.

Abstract: The invention relates to a method for generating an ion current which occurs as a direct current between a central electrode and one or more side electrodes of a spark plug of a spark ignition engine which is supplied repeatedly with an ignition voltage from an ignition voltage source, wherein the spark ignition engine is assigned an engine control unit, which, in an engine cycle, determines for each spark plug a target ignition point and/or an activation point for the ignition voltage source before the target ignition point, and a second voltage source is provided, which delivers a second voltage for the generation of the ion current, wherein the second voltage source lying in the engine cycle for a first time interval ?t1, which is shorter than the duration of the engine cycle, is connected to the electrodes of the spark plug, and wherein the ion current flowing as a result of the application of the second voltage to the electrodes of the spark plug takes a path which avoids the ignition voltage source.

Abstract: The invention relates to a method for energizing an HF resonant circuit which contains an igniter as a component for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine by means of a corona discharge, wherein the igniter comprises an ignition electrode and an insulator surrounding the ignition electrode, by means of a DC-AC inverter which is excited by successive current pulses which each last while a switch controlled by a control circuit is in its conducting switching state. It is provided according to the invention that the switch is actuated when an instantaneous value of an alternating current or an alternating current voltage excited in the HF resonant circuit falls below a first switching threshold (A?, B?, C?) and the switch s actuated when the instantaneous value of the alternating current or the alternating current voltage excited in the HF resonant circuit exceeds a second switching threshold (A+, B+, C+).

Abstract: The invention relates to a corona ignition device, comprising a center electrode, an insulator surrounding the center electrode, a coil, which is connected to the center electrode, and a housing pipe, in which the coil is arranged. The housing pipe comprises a substrate layer and a conducting layer arranged radially inwardly of the substrate layer. The conducting layer is made of a material having a greater electrical conductivity than the material of the substrate layer. The conducting layer has a thickness of at least 0.1 mm. Also disclosed is a method for producing a corona ignition device, in which, to produce the housing pipe, an inner pipe is inserted into an outer pipe. The invention also relates to a corona ignition device of which the coil is surrounded by a soft-magnetic shielding.

Abstract: The invention relates to a method for generating an ion current which occurs as a direct current between a central electrode and one or more side electrodes of a spark plug of a spark ignition engine which is supplied repeatedly with an ignition voltage from an ignition voltage source, wherein the spark ignition engine is assigned an engine control unit, which, in an engine cycle, determines for each spark plug a target ignition point and/or an activation point for the ignition voltage source before the target ignition point, and a second voltage source is provided, which delivers a second voltage for the generation of the ion current, wherein the second voltage source lying in the engine cycle for a first time interval ?t1, which is shorter than the duration of the engine cycle, is connected to the electrodes of the spark plug, and wherein the ion current flowing as a result of the application of the second voltage to the electrodes of the spark plug takes a path which avoids the ignition voltage source.

Abstract: A method for actuating a spark plug, in which the spark plug is assigned a first ignition coil and second ignition coil.

Abstract: Described is an igniter comprising an arrangement composed of an ignition electrode, an outer conductor coaxially enclosing the ignition electrode, and an electric insulator disposed between the ignition electrode and the outer conductor, via which insulator the ignition electrode and the outer conductor are interconnected, for igniting a fuel/air mixture in a combustion chamber, in particular in an internal combustion engine comprising one or more combustion chambers which are delimited by walls that are at ground potential, by creating a corona discharge in an area surrounding the tip of the ignition electrode. According to the invention, the ratio of the outer diameter d of the ignition electrode and the inner diameter D of the outer conductor is in the range of 0.3 to 0.44.

Abstract: Herein is described a method for the heating-up of a ceramic glow plug by applying a variable electric voltage to the glow plug. In accordance with the invention it is provided that, starting from a base value, the electric voltage increases in a time-averaged manner superproportional to the elapsed heating-up time. The invention relates also to a glow plug control unit for carrying out of such a method.

Abstract: The invention relates to a method for energizing an HF resonant circuit which contains an igniter as a component for igniting a fuel-air mixture in a combustion chamber of an internal combustion engine by means of a corona discharge, wherein the igniter comprises an ignition electrode and an insulator surrounding the ignition electrode, by means of a DC-AC inverter which is excited by successive current pulses which each last while a switch controlled by a control circuit is in its conducting switching state. It is provided according to the invention that the switch is actuated when an instantaneous value of an alternating current or an alternating current voltage excited in the HF resonant circuit falls below a first switching threshold (A?, B?, C?) and the switch s actuated when the instantaneous value of the alternating current or the alternating current voltage excited in the HF resonant circuit exceeds a second switching threshold (A+, B+, C+).

Abstract: Described is an igniter comprising an arrangement composed of an ignition electrode, an outer conductor coaxially enclosing the ignition electrode, and an electric insulator disposed between the ignition electrode and the outer conductor, via which insulator the ignition electrode and the outer conductor are interconnected, for igniting a fuel/air mixture in a combustion chamber, in particular in an internal combustion engine comprising one or more combustion chambers which are delimited by walls that are at ground potential, by creating a corona discharge in an area surrounding the tip of the ignition electrode. According to the invention, the ratio of the outer diameter d of the ignition electrode and the inner diameter D of the outer conductor is in the range of 0.3 to 0.44.

Abstract: Herein is described a method for the heating-up of a ceramic glow plug by applying a variable electric voltage to the glow plug. In accordance with the invention it is provided that, starting from a base value, the electric voltage increases in a time-averaged manner superproportional to the elapsed heating-up time. The invention relates also to a glow plug control unit for carrying out of such a method.