Air Shielded Water Cooled Exhaust Manifold With Exhaust Tube Support
AssigneeCaterpillar Inc.
InventorsMD Anwarul Karim, Robert A. Sarsfield, Daniel Richard Barb
Life of this patent
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Abstract
An internal combustion engine includes a cylinder block defining at least one cylinder, and a cylinder head coupled to the cylinder block. An exhaust manifold is coupled to the cylinder head and configured to receive exhaust gas from the cylinder head. The exhaust manifold includes a water jacket tube defining a plurality of liquid coolant passages and an exhaust tube received within the water jacket tube. The exhaust manifold also includes an air gap between the exhaust tube and the water jacket tube. A support mat is positioned in the air gap and compressed between an outer surface of the exhaust tube and an inner surface of the water jacket tube.
Claims20
An internal combustion engine, comprising:
- a cylinder block defining at least one cylinder;
- a cylinder head coupled to the cylinder block;
- an exhaust manifold coupled to the cylinder head and configured to receive exhaust gas from the cylinder head, wherein the exhaust manifold includes a water jacket tube defining a plurality of liquid coolant passages and an exhaust tube received within the water jacket tube, wherein the exhaust manifold includes an air gap between the exhaust tube and the water jacket tube;
- and
- a support mat positioned in the air gap, wherein the support mat is compressed between an outer surface of the exhaust tube and an inner surface of the water jacket tube.
A modular exhaust manifold for an internal combustion engine, comprising:
- a first exhaust manifold segment including a first segment of a water jacket tube defining a first plurality of liquid coolant passages and a first segment of an exhaust tube received within the first water jacket tube segment;
- wherein the first exhaust manifold segment includes a first air gap between the first exhaust tube segment and the first water jacket tube segment;
- and
- a first support mat positioned in the first air gap, wherein the first support mat is compressed between an outer surface of the first exhaust tube segment and an inner surface of the first water jacket tube segment.
A method of assembling a modular exhaust manifold for an internal combustion engine, comprising steps of:
- assembling a first exhaust manifold segment by:
- positioning a first support mat around a first segment of an exhaust tube;
- receiving the first exhaust tube segment within a first segment of a water jacket tube defining a first plurality of liquid coolant passages;
- wherein the receiving step includes compressing the first support mat between an outer surface of the first exhaust tube segment and an inner surface of the first water jacket tube segment;
- and
- maintaining an air gap between the first exhaust tube segment and the first water jacket tube segment with the first support mat.
Dependencies are inferred from the claim text.