Exhaust manifold assembly for internal combustion engine

A method of assembling an exhaust manifold for an internal combustion engine, comprising:

• inserting a plurality of manifold flanges within recesses in an outer housing;
• positioning one or more portions of an inner housing within the outer housing;
• adjusting a position of the outer housing relative to one or more of the plurality of manifold flanges;
• welding the outer housing to the plurality of manifold flanges adjacent an outer perimeter region of a sleeve portion;
• and
• coupling the outer housing to the inner housing at a first end flange;
• wherein the sleeve portion forms a passage that receives a part of the inner housing therein and is configured to receive a coolant flow therein;
• wherein the passage of the sleeve portion has a first converging region, a diverging region and a second converging region configured for passage of the coolant flow.

An internal combustion engine comprising:

• an engine block;
• a cylinder head coupled to the engine block;
• and
• an exhaust manifold assembly coupled to the cylinder head, the exhaust manifold assembly comprising:
• an inner housing receiving an exhaust gas from the cylinder head;
• an outer housing receiving at least a portion of the inner housing and receiving a coolant flow that passes along a length of the outer housing between the inner housing and the outer housing;
• and
• a plurality of manifold flanges coupled to the outer housing and spaced from one another along the length thereof, wherein the plurality of manifold flanges are mounted on the cylinder head, wherein each of the plurality of manifold flanges has a sleeve portion forming a passage that receives a part of the inner housing therein and receives the coolant flow;
• and
• wherein the exhaust manifold assembly further includes a first end flange that forms at least a portion of a first end of the exhaust manifold assembly, wherein the first end flange is coupled to the outer housing and the inner housing, and wherein the first end flange is configured to receive the coolant flow within a pocket therein, wherein the first end flange has a triangular shape and the inner housing and the outer housing have a tube-like shape.