Borgwarner Ludwigsburg Gmbh

Borgwarner Beru Systems Gmbh

Tom Achtstätter

Timo Stifel

Johannes Hasenkamp

Gerd Bräuchle

Ganghua Ruan

Felizitas Heilmann

Volker Dezius

Heiko Schrader

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.

Corona ignition device and method for producing a corona ignition device

A corona ignition device for igniting fuel in an internal combustion engine by means of a corona discharge. The device comprises a center electrode, an insulator into which the center electrode is inserted, a coil body onto which a coil that is connected to the center electrode is wound, and a shielding cap which is fitted onto an end section of the coil body. The end section faces the insulator. According to this disclosure, the shielding cap comprises one or a plurality of slots.

Corona ignition device

The invention relates to a corona ignition device for igniting fuel in an internal combustion engine by means of a corona discharge, comprising a central electrode, an insulator, into which the central electrode plugs, a housing, into which the insulator plugs, a bobbin, onto which a coil which is attached to the central electrode is wound, and a shield cap, which is plugged onto an end portion of the bobbin facing the insulator. According to the invention, a portion of the central electrode protrudes through a bottom of the shield cap, or a circumferential wall of the shield cap has one or more slots, or the shield cap has a circumferential wall, which protrudes only on one side beyond the bottom of the shield cap only on one side.

The invention relates to a method for producing a corona ignition device, in which a center electrode is plugged into an insulator and is connected to a coil, the coil is arranged in a housing tube, a mount for the insulator is fastened to a front end of the housing tube, and a plug connector is fastened to a rear end of the housing tube, and the housing tube is filled with insulating gas. In accordance with this disclosure, the insulating gas is introduced into the housing tube through a bore which is later sealed by welding. In one embodiment, a peg is plugged into the bore to facilitate sealing. In another embodiment, the bore is drilled into the plug connector.

Method for producing a corona ignition device

A corona ignition device for igniting fuel in an internal combustion engine by means of a corona discharge. The corona ignition device comprises a central electrode, an insulator into which the central electrode is plugged, a housing into which the insulator is plugged, a coil body onto which a coil from a winding wire is wound, which coil is connected to the central electrode, and a contact element that is located in a recess of the coil body and contacts the wire. It is provided that the contact element has a slot that runs in the longitudinal direction of the coil body, and the coil body has an opening in a side wall of the recess, wherein the wire is fed through the opening in the side wall of the recess and is held in the slot of the contact element.

The invention relates to a corona ignition device for igniting fuel in a combustion chamber of an engine by means of a corona discharge, comprising a tubular housing, a coil arranged in the tubular housing, an insulator, which plugs into the tubular housing, and a center electrode, which is connected to the coil, plugs into the insulator and leads to at least one ignition tip. In order to increase the service life of the ignition tip, said ignition tip consists in part or completely of an iridium-based alloy containing 3 to 30% by weight of rhodium or is coated by a burn-up layer.

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Hemmingen, Germany

Tom Achtstätter