Modular exhaust manifold with independent sealing of exhaust tube and coolant passage

摘要

An internal combustion engine includes a cylinder block defining at least one cylinder, and a cylinder head coupled to the cylinder block. A modular exhaust manifold is coupled to the cylinder head and is configured to receive exhaust gas from the cylinder head. The modular exhaust manifold includes a plurality of exhaust manifold segments coupled together along a common axis. Each of the exhaust manifold segments includes a segment of a water jacket tube defining a plurality of liquid coolant passages and a segment of an exhaust tube received within the water jacket tube segment. A joint between adjacent exhaust manifold segments includes a first sealing member configured to seal the exhaust tube at the joint and a second sealing member configured to seal at least one of the liquid coolant passages at the joint. The first and second sealing members are supported on and movable with different components.

主权项

1. An internal combustion engine, comprising:
a cylinder block defining at least one cylinder; a cylinder head coupled to the cylinder block; a modular exhaust manifold coupled to the cylinder head and configured to receive exhaust gas from the cylinder head, the modular exhaust manifold including a plurality of exhaust manifold segments coupled together along a common axis, and each of the exhaust manifold segments includes a segment of a water jacket tube defining a plurality of liquid coolant passages and a segment of an exhaust tube received within the water jacket tube segment; and the plurality of exhaust manifold segments including at least two adjacent exhaust manifold segments and a joint disposed between the at least two adjacent exhaust manifold segments, the joint having a first sealing member configured to seal at least one of the exhaust tube segments at the joint and a second sealing member configured to seal at least one of the liquid coolant passages at the joint, the first and second sealing members being supported on and movable with different components, and the second sealing member including at least one o-ring seal, wherein adjoining ends of the adjacent exhaust manifold segments each include a radial flange defining an engagement face configured for coupling the adjacent exhaust manifold segments together, and wherein the first sealing member includes a gasket positioned between the engagement face of each of the adjoining ends of the adjacent exhaust manifold segments.