Semi-airgap manifold formation

Details Semi-airgap manifold formation Semi-airgap manifold formation

1996-06-11

1998-03-24

McMahon, Marguerite

Power plants

Internal combustion engine with treatment or handling of...

Common receiver having inlets from plural cylinder

F01N 710

Patent

active

057299757

ABSTRACT:
An engine exhaust manifold and method of making it, comprising an exhaust port flange having a plurality of exhaust port openings therethrough, a base half shell having a pair of elongated, spaced walls terminating in elongated free ends, a plurality of runners attached to the port flange at the exhaust port openings, a liner half shell having a wall thickness less than that of the base half shell, having a pair of spaced walls terminating in elongated free ends overlapping the base half shell free ends, the liner half shell being oriented opposite the orientation of the base half shell to form a flow passage therebetween, a jacket half shell having a thickness greater than that of the liner half shell, having a pair of spaced elongated walls terminating in elongated free ends, the jacket half shell extending over and encompassing the liner half shell but spaced therefrom to form an airgap therebetween except at the jacket half shell free ends and the liner half shell free ends, the jacket half shell free ends overlapping both the liner half shell free ends and the base half shell free ends, and engaging the liner half shell free ends, the base half shell free ends, liner half shell free ends, and jacket half shell free ends being welded together to form a manifold body, and an outlet port from the manifold flow passage, the liner free ends extending beyond the jacket free ends to provide sacrificial welding portions during welding assembly.

REFERENCES:
patent: 4142366 (1979-03-01), Tanahashi
patent: 4373331 (1983-02-01), Santiago et al.
patent: 4386586 (1983-06-01), Santiago et al.
patent: 4689952 (1987-09-01), Arthur
patent: 5148675 (1992-09-01), Inman
patent: 5349817 (1994-09-01), Bekkering

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