Electrically insulating, gas-tight leadthrough for at least one electrical conductor through a metallic sheath

摘要

An exhaust gas system for an internal combustion engine, in particular an electrically heatable catalytic converter, includes a metallic sheath having tabs and at least one electrical conductor extending through the tabs. An electrically insulating, gas-tight leadthrough for the at least one electrical conductor in the vicinity of the tabs includes first and second successively disposed sections. The first section is closer to the exhaust gas system for electrical insulation and is resistant to temperatures up to 1300 DEG C., but need not be completely gas-tight. The second section is farther from the exhaust gas system and is gas-tight and electrically insulating for temperatures up to 500 DEG C.