Robert Boschgmbh

Tim Skowronek

Thomas Pawlak

Wolfgang Sinz

Markus Weimert

Konstantin Lindenthal

Lothar Detels

Bernd Fischer

Karl-Heinz Nuebel

Werner Steinberger

Guenter Escher

Thomas Breckle

Nikolaus Hautmann

Florian Herzog

Hartwig Senftleben

Alwin Stegmaier

Joerg Eichhorn

Reinhard Seidl

Stefan Groezinger

Michael Juhas

Stefan Grözinger

Felix Bittner

Gennaro Romano

Kazim Kahraman

Sebastian Hoffmann

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

A method for operating an ignition system for an internal combustion engine, including a first voltage generator and a bypass, is described. The bypass may include, for example, a boost converter for maintaining a spark generated with the aid of the first voltage generator. A speed of an internal combustion engine used with the ignition system is ascertained and the operating mode of the bypass is modified in response to the speed change.

Ignition system and method for operating an ignition system for an internal combustion engine

A method for checking electrodes of a spark gap of an ignition system for a combustion chamber of an internal combustion engine with an externally provided ignition includes generating a spark at the spark gap in an operating state without ignition of an ignitable mixture in the combustion chamber; ascertaining a parameter or characteristic function representing the spark current, the spark voltage, and/or the spark duration; comparing the parameter or the characteristic function to a reference; adapting an energy for a voltage buildup for a further spark generation for the mixture ignition and/or for maintaining an ignition spark for the mixture ignition, in particular for a future ignition process, as a function of a difference between the parameter or the characteristic function and the reference.

Ignition system and method for checking electrodes of a spark plug of an internal combustion engine

An ignition system and a method for controlling an ignition system for a spark-ignited internal combustion engine are described, having a primary voltage generator for generating an ignition spark and a boost converter for maintaining an ignition spark. The method includes sending a signal from an engine control unit to the ignition system, in order to determine a predetermined ignition timing for triggering an ignition spark, sending an additional signal from the engine control unit to the ignition system, in order to determine a predetermined additional ignition timing for triggering an additional ignition spark, and sending a control signal for influencing the operating mode of the boost converter from the engine control unit to the ignition system between the signal and the additional signal.

Ignition system and method for controlling an ignition system for a spark-ignited internal combustion engine

An ignition system and a method for suppressing an ignition spark discharge at a spark gap at an unsuitable time are provided. The method includes a recognition of a spark breakaway and/or a failed ignition and, in response thereto, by producing a conductive path via an ignition spark at the spark gap at a suitable time.

Method for operating an ignition system and a corresponding ignition system

A method is described for operating an ignition system for an internal combustion engine, including a primary voltage generator and a bypass, in particular, a boost converter for maintaining a spark generated with the aid of the primary voltage generator, the method includes an ascertainment of a modified energy requirement for an ignition spark, which is to be maintained with the aid of the bypass and a modification of the working mode of the bypass in response thereto.

Ignition system and method for operating an ignition system

An ignition system and a method for operating an ignition system for an internal combustion engine are provided, including a primary voltage generator and a boost converter for generating an ignition spark. An ascertainment of a voltage requirement for the ignition spark is followed by a modification of a switch-on time of the boost converter relative to a switch-off time of the primary voltage generator.

An ignition system includes: a step-up transformer having a primary side and a secondary side; an electric energy source which is able to be connected to the primary side; a spark gap, which is designed to carry a current transferred to the secondary side by the step-up transformer. The step-up transformer has a bypass for transferring electric energy from the electric energy source to the secondary side. The bypass is designed to support a decaying electrical signal in the secondary coil of the high-voltage generator as of a predefined time, or as of a predefined intensity of the current being reached.

Ignition system for an internal combustion engine

An ignition system includes: a step-up transformer having a primary side and a secondary side; an electrical energy source configured to be selectably connected to the primary side; a spark gap which is configured to guide a current transferred by the step-up transformer to the secondary side. The step-up transformer has a bypass for transferring electrical energy from the electrical energy source to the secondary side. The ignition system is configured to couple electrical energy in series or in parallel to the secondary side of the high voltage generator for the purpose of maintaining an ignition spark as an electrical voltage in the form of a controlled pulse sequence, e.g., within the kilo-hertz range.

An ignition coil of an ignition system in an internal combustion engine has a housing, a magnetically active core, a first coil winding connected to a supply voltage, and a second coil winding connected to a high-voltage terminal. At least one electrically conductive component is provided, at least in some areas, with a means for an electrically effective evening out of its surface.

Ignition coil

A magnetic circuit for an ignition coil or a transformer, including an inner, essentially rod-shaped core and an outer core. The outer core includes a strip-shaped element of thickness, length and width, and is situated around the inner core in such a way that the strip-shaped element is positioned at the faces of the inner core with its thickness perpendicular to the longitudinal direction of the inner core.

Magnetic circuit for ignition coils or transformers

A device for energy storage and energy transformation is described, in particular an ignition coil of an ignition system of a motor vehicle, having a magnetically active I core, which is surrounded by a first coil former having a winding connected to a supply voltage, and a second coil former having a winding connected to a high-voltage terminal, and having a peripheral core forming a magnetic circuit with the I core and enclosing the system made up of the first and second coil formers. In its circumferential extension, the peripheral core has a recess to accommodate an end area of the I core.

Device for energy storage and energy transformation

An ignition coil for an internal combustion engine, including a magnetically active core, a first coil shell which is used as a support for a first coil winding made of an electrically conductive wire, and a second coil shell which is positioned so as to be concentric to the first coil shell and is used as a support for a second coil winding made of an electrically conductive wire. Situated between the first coil winding and the second coil winding is a shielding layer, which is made of an electrically conductive material and provided with a grounding contact.

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Missen-Wilhams, Germany

Tim Skowronek