air gap insulated exhaust gas manifold and a process for the preparation of an air gap insulated exhaust gas manifold

摘要

It is a air gap insulated exhaust gas manifold (1) with an inner tube structure (3), which is covered by an outer jacket (5) is surrounded, wherein between the inner tube structure (3) and the outer jacket (5) an air gap (7) is formed, and provided with at least one flange (9) is proposed. The air gap insulated exhaust gas manifold (1) is characterized in that the inner tube structure (3) is formed at least partially as a molding, wherein at least one tube section (13, 13 '', 13 ") of the inner tube structure (3) with a radial play in a receiving neck (17) of the at least one flange (9) is received.