Igniter for igniting a fuel/air mixture in an internal combustion engine using a corona discharge

US8860290B2 · kind B2 · utility

Assignee

• BORGWARNER BERU SYSTEMS GMBH · DE

Inventors

• Martin Allgaier · Ludwigsburg, DE
• Gerd Bräuchle · Gundelsheim, DE
• Thomas Giffels · Stuttgart, DE
• Felizitas Heilmann · Gerlingen, DE

Key dates

• Filing date: Jun 3, 2011
• Grant date: Oct 14, 2014
• Expiry date: Apr 5, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P23/045
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An igniter for igniting a fuel/air mixture using a corona discharge, generated by a high-frequency electric high voltage, in an internal combustion engine having one or more combustion chambers delimited by walls at ground potential, comprising an ignition electrode, which traverses in an electrically insulated manner one of the walls delimiting the particular combustion chamber and constitutes in cooperation with the walls of the combustion chamber, that are at ground potential, an electrical capacitance. Comprising a metallic or metallized outer member and an elongate passage extending through the outer member, through which extends the ignition electrode, and comprising an insulator which encloses the ignition electrode and insulates it electrically from the outer member, wherein the ignition electrode, the insulator, and the passage have a common longitudinal direction. The insulator is composed of a plurality of layers extending in the longitudinal direction, or is subdivided into a plurality of such layers.