Patent ID: 8860290
Filing Date: 2014-10-14
Classification: F02P,H01T

Abstract:
1. An igniter for igniting a fuel/air mixture using a corona discharge, which is generated by a high-frequency electric high voltage, in an internal combustion engine having one or more combustion chambers delimited by walls that are 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, wherein the insulator is composed of a plurality of layers extending in the longitudinal direction, or is subdivided into a plurality of such layers, and wherein at least one electrically conductive intermediate layer is embedded entirely in the insulator, such that at least between two electrically insulating layers is disposed one electrically conductive intermediate layer.