Robert Boschgmbh

Hartwig Senftleben

Manfred Vogel

Bernhard Opitz

Tim Skowronek

Bernd Hilgenberg

Bernd Fischer

Mario Maier

The invention relates to an ignition device () for an internal combustion engine, more particularly for a hydrogen-fueled internal combustion engine, comprising a primary circuit () and a secondary circuit (), wherein—the primary circuit () has a primary coil (), wherein—the secondary circuit () has a secondary coil () inductively coupled to the primary coil (), a diode () for suppressing a start-up spark, and a high-voltage connector () for connection to a spark plug (), characterized in that a parallel path () is formed electrically in parallel to the diode () of the secondary circuit (), in which parallel path there is arranged an ohmic load resistor () or an electric switch () and by means of which parallel path residual energy, in particular residual voltage, which remains in the secondary circuit () following discharge of the ignition device (), can be extinguished, in particular by feeding the residual energy in the secondary circuit () past the diode (), bypassing the diode ().

Ignition device for an internal combustion engine

An ignition device for a combustion chamber of an internal combustion engine includes a first electrode and a second electrode, which is movable with the aid of an actuator. The ignition device is configured to generate a first ignition spark when a contact between the first and second electrode is interrupted. To accomplish this, the second electrode is moved away from the first electrode. A third electrode is also provided, which is spaced apart from the first electrode. With the aid of the third electrode, a second ignition spark can be generated by moving the second electrode away from the other two electrodes. With the three electrodes, the ignition unit is configured to allow the two ignition sparks to pass through a volume formed between the electrodes in the direction transverse to the longitudinal extension of the ignition sparks in the course of the movement of the second electrode.

Ignition unit for an internal combustion engine

The invention relates to a device for controlling a multiple spark operation of an internal combustion engine, wherein an ignition transformer can be switched off and back on again for delivering or interrupting an ignition spark energy based on at least one current threshold. The invention proposes that the at least one current threshold be programmable.

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Oberstdorf-Tiefenbach, Germany

Hartwig Senftleben