Abstract: In order to reduce AC ringing of the secondary voltage after the spark event in a capacitive ignition system, which would influence ion-sensing, a secondary winding current (IR) flowing through the secondary winding (4) after the spark event is forced to flow through a forward-biased muting diode (D1) that is connected across the secondary winding (4).

Abstract: An ignition device has a high voltage transformer having a primary side and a secondary side, of which the primary side is connected to a high voltage source and the secondary side is connected to a spark path to provide the ignition spark. The time variation in the primary current flowing on the primary side is measured and subdivided at least into a spark burning phase and a subsequent free-running phase of the high voltage transformer. The transition from the spark burning phase into the free-running phase is equated to the moment of extinction of the ignition spark. The time variation of the primary current in the spark burning phase is mapped by a first function and in the free-running phase by a second function, and the intersection point of the two functions is equated to the moment of extinction of the ignition spark.

Abstract: An ignition device for an internal combustion engine includes an ignition coil which is feedable on its primary side by a voltage supply unit, a secondary current measuring device for measuring the course of the secondary side current, a control device for at least temporary controlling of the primary side voltage or the primary side current in dependence on the measured course of the secondary side current. Subsequent to an interruption of the primary side voltage or current supply of the ignition coil during an ignition process or subsequent to the drop of the primary side voltage or the primary side current in the ignition coil below a predeterminable threshold during the ignition process, the control device energizes or regulates the primary side voltage or current supply of the ignition coil above the predeterminable threshold only when the secondary side current induced thereby acts in the direction of the predetermined course of the secondary side current.

Abstract: A method includes determining the moment of extinction of an ignition spark of an ignition device for an internal combustion engine, wherein the ignition device has a high voltage transformer having a primary side and a secondary side, of which the primary side is connected to a high voltage source and the secondary side is connected to a spark path to provide the ignition spark. The time variation in the primary current flowing on the primary side is measured and subdivided at least into a spark burning phase and a subsequent free-running phase of the high voltage transformer, and the transition from the spark burning phase into the free-running phase is equated to the moment of extinction of the ignition spark. The time variation of the primary current in the spark burning phase is mapped by a first function and in the free-running phase by a second function, and the intersection point of the two functions is equated to the moment of extinction of the ignition spark.

Abstract: An Ignition device for an internal combustion engine including a control device and an ignition coil which is feedable on its primary side by a voltage supply unit. The control device is provided to interrupt or reduce the voltage impressed on the primary side of the ignition coil when a magnitude of a magnetic induction B on the primary side of the ignition coil is greater than a predeterminable maximum value.

Abstract: Ignition device for an internal combustion engine comprising an ignition coil which is feedable on its primary side by a voltage supply unit and a secondary current measuring device for measuring the course of the secondary side current and a control device for at least temporary controlling of the primary side voltage or the primary side current in dependence on the measured course of the secondary side current, wherein, subsequent to an interruption of the primary side voltage or current supply of the ignition coil during an ignition process or subsequent to the drop of the primary side voltage or the primary side current in the ignition coil below a predeterminable threshold during the ignition process, said control device energises or regulates the primary side voltage or current supply of the ignition coil above the predeterminable threshold only when the secondary side current induced thereby acts in the direction of the predetermined course of the secondary side current.

Abstract: An Ignition device for an internal combustion engine comprising a control device and an ignition coil which is feedable on its primary side by a voltage supply unit, wherein said control device is provided to interrupt or reduce the voltage impressed on the primary side of the ignition coil when a magnitude of a magnetic induction B on the primary side of the ignition coil is greater than a predeterminable maximum value.

Abstract: A spark plug connector, in particular for large engines, includes an inductive interference suppression device having a ferromagnetic core. The inductive interference suppression device also has at least one winding, preferably a coil, and an ohmic d.c. resistance of at least 20? at 20° C.

Abstract: A spark plug connector (2), in particular for large engines, with an inductive interference suppression device (3) which has a ferromagnetic core (14) with at least one winding (13), preferably a coil, and an ohmic d.c. resistance of at least 20 ? at 20° C.