Composite intake manifold assembly for an internal combustion engine and method for producing same

A composite air intake manifold assembly adapted for use with an internal combustion engine comprising:

• an upper half shell formed from a polymer and including an upper perimeter flange including a pair of side flanges and a pair of end flanges;
• said side flanges having an inner surface and said end flanges having an inner surface;
• a lower half shell formed from a polymer and joined to said upper half shell, said lower half shell including a lower perimeter flange including a pair of side flanges and a pair of end flanges, said side flanges having an inner surface and said end flanges having an inner surface, said lower half shell joined to said upper half shell to define a housing having an internal cavity, said internal cavity including at least a pair of spaced apart generally cylindrical shaped air intake runners, each of said runners including an opened air intake end, adapted to receive atmospheric air, and an opened air inlet end, adapted to be connected to an associated an air inlet side of a cylinder head of the internal combustion engine;
• and
• a one piece full inner shell formed from a polymer and disposed within said cavity of said housing, said inner shell in combination with said upper half shell and said lower half shell cooperating to define at least a pair of spaced apart air intake runners, each of said runners including an opened air intake end, adapted to receive atmospheric air, and an opened air inlet end, adapted to be connected to an associated air inlet side of a cylinder head of the internal combustion engine, said one piece inner shell including an outer peripheral edge which defines a pair of opposed side flanges and a pair of opposed end flanges, each of said side flanges including an upper side flange surface and a lower side flange surface, each of said end flanges including an upper end flange surface and a lower end flange surface, said upper side flange surfaces and said upper end flange surfaces defining a continuous upper welding perimeter flange around an upper edge of said one piece inner shell for joining said one piece inner shell to said upper half shell, and said lower side flange surfaces and said lower end flange surfaces defining a continuous lower welding perimeter flange around a lower edge of said one piece inner shell for joining said one piece inner shell to said lower half shell;
• wherein when said upper perimeter flange of said upper half shell is positioned against said upper welding perimeter flange of said one piece inner shell and said lower perimeter flange of said lower half shell is positioned against said lower welding perimeter flange of said one piece inner shell, a generally triple wall thickness surface is formed between said side flanges and said end flanges of said upper half shell, said side flanges and said end flanges of said lower half shell, and said side flanges and said end flanges of said one piece inner shell, said end flanges of said upper half shell, said end flanges of said lower half shell, and said end flanges of said one piece inner shell being joined together by a weld, and said side flanges of said upper half shell, said side flanges of said lower half shell, and said side flanges of said one piece inner shell being joined together by a weld that extends in a generally straight plane and which is generally transverse to the direction of the air flow through said runners to thereby increase the burst strength of said composite air intake manifold assembly.

A method for producing a composite air intake manifold assembly adapted for use with an internal combustion engine comprising the steps of:

• (a) providing an upper half shell formed from a polymer and including an upper perimeter flange including a pair of side flanges and a pair of end flanges;
• the side flanges having an inner surface and the end flanges having an inner surface;
• (b) providing a lower half shell formed from a polymer and including a lower perimeter flange including a pair of side flanges and a pair of end flanges, the side flanges having an inner surface and the end flanges having an inner surface, the lower half shell adapted to be joined to the upper half shell to define a housing having an internal cavity, the internal cavity including at least a pair of spaced apart generally cylindrical shaped air intake runners, each of the runners including an opened air intake end, adapted to receive atmospheric air, and an opened air inlet end, adapted to be connected to an associated an air inlet side of a cylinder head of the internal combustion engine;
• (c) positioning the lower perimeter flange of the lower half shell adjacent the upper perimeter flange of the upper half shell so as to form a generally double wall thickness surface is formed between the side flanges and the end flanges of the upper half shell and the side flanges and the end flanges of the lower half shell,
• (d) joining the end flanges of the upper half shell and the end flanges of the lower half shell together by a weld;
• and
• (e) joining the side flanges of the upper half shell and the side flanges of the lower half shell by a weld that extends in a generally straight plane which is generally transverse to the direction of the air flow through the pair of spaced apart air intake runners and which includes only a slight curvature in the weld at a transition defined between the pair of spaced apart air intake runners so as to slightly offset the weld in one of the pair of spaced apart air intake runners relative to the weld in the other one of the pair of spaced apart air intake runners to thereby increase the burst strength of the composite air intake manifold assembly.

A method for producing a composite air intake manifold assembly adapted for use with an internal combustion engine comprising the steps of:

• (a) providing an upper half shell formed from a polymer and including an upper perimeter flange including a pair of side flanges and a pair of end flanges;
• the side flanges having an inner surface and the end flanges having an inner surface;
• (b) providing a lower half shell formed from a polymer and including a lower perimeter flange including a pair of side flanges and a pair of end flanges, the side flanges having an inner surface and the end flanges having an inner surface, the lower half shell adapted to be joined to the upper half shell to define a housing having internal cavity, the internal cavity including at least a pair of spaced apart generally cylindrical shaped air intake runners, each of the runners including an opened air intake end, adapted to receive atmospheric air, and an opened air inlet end, adapted to be connected to an associated an air inlet side of a cylinder head of the internal combustion engine;
• (c) positioning the lower perimeter flange of the lower half shell adjacent the upper perimeter flange of the upper half shell so as to form a generally double wall thickness surface is formed between the side flanges and the end flanges of the upper half shell and the side flanges and the end flanges of the lower half shell,
• (d) joining the end flanges of the upper half shell and the end flanges of the lower half shell together by a weld;
• (e) joining the side flanges of the upper half shell and the side flanges of the lower half shell by a weld that extends in a generally straight plane and which is generally transverse to the direction of the air flow through the runners to thereby increase the burst strength of the composite air intake manifold assembly;
• and
• (f) providing a one piece full inner shell formed from a polymer;
• and prior to step (d), the step of disposing the one piece full inner shell in the housing, wherein the one piece full inner shell in combination with the upper half shell and the lower half shell cooperate to define at least a pair of spaced apart air intake runners, each of the runners including an opened air intake end, adapted to receive atmospheric air, and an opened air inlet end, adapted to be connected to an associated air inlet side of a cylinder head of the internal combustion engine, wherein the one piece full inner shell includes an outer peripheral edge which defines a pair of opposed side flanges and a pair of opposed end flanges, each of said the flanges including an upper side flange surface and a lower side flange surface, each of the end flanges including an upper end flange surface and a lower end flange surface, the upper side flange surfaces and the upper end flange surfaces defining a continuous upper welding perimeter flange around an upper edge of the one piece inner shell, the lower side flange surfaces and the lower end flange surfaces defining a continuous lower welding around a lower edge of the one piece full inner shell, and during step (c) the upper half shell, the lower half shell, and the one piece full inner shell are joined together by welding along the perimeter flanges.

A composite air intake manifold assembly adapted for use with an internal combustion engine comprising:

• an upper half shell formed from a polymer and including an upper perimeter flange including a pair of side flanges and a pair of end flanges;
• said side flanges having an inner surface and said end flanges having an inner surface;
• a lower half shell formed from a polymer and joined to said upper half shell, said lower half shell including a lower perimeter flange including a pair of side flanges and a pair of end flanges, said side flanges having an inner surface and said end flanges having an inner surface, said lower half shell joined to said upper half shell to define a housing having an internal cavity, said internal cavity including at least a pair of spaced apart generally cylindrical shaped air intake runners, each of said runners including an opened air intake end, adapted to receive atmospheric air, and an opened air inlet end, adapted to be connected to an associated an air inlet side of a cylinder head of the internal combustion engine;
• and
• a one piece full inner shell formed from a polymer and disposed within said cavity of said housing, said inner shell in combination with said upper half shell and said lower half shell cooperating to define at least a pair of spaced apart air intake runners, each of said runners including an opened air intake end, adapted to receive atmospheric air, and an opened air inlet end, adapted to be connected to an associated air inlet side of a cylinder head of the internal combustion engine, said one piece inner shell including an outer peripheral edge which defines a pair of opposed side flanges and a pair of opposed end flanges, each of said side flanges including an upper side flange surface and a lower side flange surface, each of said end flanges including an upper end flange surface and a lower end flange surface, said upper side flange surfaces and said upper end flange surfaces defining a continuous upper welding perimeter flange around an upper edge of said one piece inner shell for joining said one piece inner shell to said upper half shell, and said lower side flange surfaces and said lower end flange surfaces defining a continuous lower welding perimeter flange around a lower edge of said one piece inner shell for joining said one piece inner shell to said lower half shell;
• wherein when said upper perimeter flange of said upper half shell is positioned against said upper welding perimeter flange of said one piece inner shell and said lower perimeter flange of said lower half shell is positioned against said lower welding perimeter flange of said one piece inner shell, a triple wall thickness surface is formed between said side flanges and said end flanges of said upper half shell, said side flanges and said end flanges of said lower half shell, and said side flanges and said end flanges of said one piece inner shell, said end flanges of said upper half shell, said end flanges of said lower half shell, and said end flanges of said one piece inner shell being joined together by a weld, and said side flanges of said upper half shell, said side flanges of said lower half shell, and said side flanges of said one piece inner shell being joined together by a weld.