Dual wall exhaust manifold and method of making same
OwnerPaul Kenyon, Michael Schmidtinventors
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Abstract
The present invention provides an improved dual-wall exhaust manifold assembly. The assembly has inner shells welded together and welded to an inlet flange. Outer shells are inserted into a counterbore of the inlet flange. An outlet flange is slid over the inner shell. The inner shell and the outer shell are inserted into the counterbore of the outlet flange. The outer shells are welded together and to the outlet and inlet flanges. The inlet counterbore and the outlet flange counterbore separate the inner and outer shells.
Claims20
A dual wall exhaust manifold comprising:
- an inner shell having a plurality of runners for transporting exhaust gases of an engine, each of the runners having a passageway for transporting the exhaust gases from an inlet to an outlet of the inner shell;
- an outer shell substantially enclosing the inner shell, the outer shell spaced apart from the inner shell;
- an outlet flange connected to the outlet of the runners, the outlet flange having a bore formed therethrough;
- and
- a counterbore formed in the outlet flange for spacing apart the inner shell and the outer shell, wherein the outer shell is welded to the outlet flange.
A dual wall exhaust manifold comprising:
- an inner shell having a plurality of runners formed therein, each runner receiving exhaust gases at an inlet and expelling the gases at an outlet;
- an outer shell substantially enclosing the inner shell, the outer shell having a plurality of channels for enclosing the runners;
- an inlet flange attached to the inlet of one of the runners, the inlet flange having a bore and a counterbore, the counterbore sized to receive the inner shell and the outer shell wherein the counterbore of the inlet flange positions the outer shell apart from the inner shell to form an air gap between the inner shell and the outer shell.
A dual wall exhaust manifold comprising:
- an inner shell having a first portion and a second portion welded together, the inner shell having a plurality of runners for transporting exhaust gases of an engine, each of the runners transporting the gases from an inlet to an outlet;
- an outer shell having a front side and a rear side welded together, the outer shell substantially surrounding the inner shell;
- an inlet flange positioned on the inlet of the runners, wherein the inner shell and the outer shell are welded to the inlet flange;
- and
- an outlet flange positioned on the outlet of the runners, the outlet flange having a slip fit joint for connecting to the inner shell, wherein the outer shell is welded to the outlet flange.
Dependencies are inferred from the claim text.