Patent ID: 6794802
Filing Date: 2004-09-21
Classification: H01T

Abstract:
A spark plug for an internal combustion engine with a combustion chamber, comprising a shell (12), an insulator (16) located in the shell and composed of a sintered ceramic material, as well as a center electrode (18) heat-fused in an insulator, and a terminal stud (22) that have an electrically conductive connection with each other and are located in the insulator,wherein a cermet (28) abuts the center electrode, wherein a ceramic phase of the cermet is composed of the same or a similar material as the insulator, wherein a metallic phase of the cermet is composed of a material having good electrical conductivity, and wherein the cermet is disposed between the center electrode and the terminal stud, wherein a burn-off resistor (30) is located in the interior of the insulator, and wherein a conductive phase of the burn-off resistor is composed of carbon.