Patent ID: 6949717
Filing Date: 2005-09-27
Classification: F23Q,H05B

Abstract:
1. A pin heater, in a sheathed-element glow plug for an internal combustion engine, comprising: at least one internal insulating layer; an external first conductive layer, the at least one internal insulating layer and the external first conductive layer including ceramic composite structures; a combustion chamber side tip; and a second conductive layer including another ceramic composite structure, the second conductive layer being bonded to the external first conductive layer in a region of the combustion chamber side tip, wherein the second conductive layer runs inside the at least one internal insulating layer; wherein: a proportion of the at least one internal insulating layer on an overall cross-section increases in the region of the combustion chamber side tip, and a combined proportion of the external first conductive layer and the second conductive layer on the overall cross-section is reduced.