Air gap manifold port flange connection

Abstract

An air gap manifold joint construction of an engine exhaust port flange having a plurality of exhaust port orifices, each with an inner orifice wall, a dual wall manifold having a plurality of runners each including an inner tubular liner and an outer tubular jacket, the inner tubular liner being generally spaced from the outer tubular jacket substantially over the length of the inner tubular liner to form an air gap, the inner tubular liner having an inlet end and the outer tubular jacket having an end adjacent to the inner tubular liner inlet end, said inner tubular liner inlet end having a periphery with an outer diameter substantially the same size as the inner diameter of the outer tubular jacket end and in peripheral engagement therewith, an adapter sleeve having first and second ends, the first end having an outer diameter substantially the same size as the diameter of the inner orifice wall of the exhaust port flange port orifice, and the second end having an outer diameter substantially the same size as the inner diameter of the inner tubular liner inlet end and in peripheral engagement therewith, an inner weld seam joining the adapter sleeve first end to the inner orifice wall, and an outer weld seam joining both the inner tubular liner inlet end and the outer tubular jacket end to the adapter sleeve second end.

Dependencies are inferred from the claim text.