Thermally enhanced exhaust port liner
AssigneeCartridge Limited
InventorsJoachim Kloss, Andreas Steinbronn
Life of this patent
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Abstract
An exhaust port liner, which may include a superalloy and may be manufactured by an additive manufacturing process, includes a monolithic structure including an outlet disposed an angle relative to an inlet, and a sidewall defining a cavity to provide enhanced thermal performance in reciprocating internal combustion engines. A cylinder head of an internal combustion engine may include a cylinder head frame, and the exhaust port liner may be disposed proximate the frame inner mounting surface, with an outer surface of the exhaust port liner conforming to an inner mounting surface of the cylinder head frame.
Claims63
An exhaust port liner for a cylinder head of an internal combustion engine, the exhaust port liner comprising:
- a monolithic structure comprising:
- an inlet;
- an outlet disposed at an angle relative to the inlet;
- and
- a sidewall comprising a metal disposed between the inlet and the outlet defining an exhaust gas flow passage through the monolithic structure, the sidewall comprising an inner wall and an outer wall defining a cavity therebetween.
An exhaust port liner for a cylinder head of an internal combustion engine, the exhaust port liner comprising:
- a monolithic structure comprising:
- an inlet;
- an outlet disposed at an angle relative to the inlet;
- a sidewall comprising a metal disposed between the inlet and the outlet defining an exhaust gas flow passage through the monolithic structure, the sidewall comprising an inner wall and an outer wall defining a cavity therebetween;
- and
- a pillar disposed in the cavity and spanning from the inner wall to the outer wall.
A method for fabricating an exhaust port liner, the method comprising the steps of:
- receiving by an additive manufacturing system control instructions for fabricating the exhaust port liner comprising:
- a monolithic structure comprising:
- an inlet;
- an outlet disposed at an angle relative to the inlet;
- and
- a sidewall comprising a metal disposed between the inlet and the outlet defining an exhaust gas flow passage through the monolithic structure, the sidewall comprising an inner wall and an outer wall defining a cavity therebetween;
- and
- executing the control instructions by the additive manufacturing system to fabricate the exhaust port liner.
A cylinder head of an internal combustion engine comprising:
- a cylinder head frame defining an inner mounting surface;
- and
- an exhaust port liner disposed proximate the frame inner mounting surface, the exhaust port liner comprising:
- a monolithic structure comprising:
- an inlet;
- an outlet disposed at an angle relative to the inlet;
- and
- a sidewall comprising a metal disposed between the inlet and the outlet defining an exhaust gas flow passage through the monolithic structure, the sidewall comprising an inner wall and an outer wall defining a sealed cavity therebetween,
- wherein an outer surface of the exhaust port liner conforms to the inner mounting surface.
All cylinder head of an internal combustion engine comprising:
- a cylinder head frame defining an inner mounting surface;
- and
- an exhaust port liner disposed proximate the frame inner mounting surface, the exhaust port liner comprising:
- a monolithic structure comprising:
- an inlet;
- an outlet disposed at an angle relative to the inlet;
- a sidewall comprising a metal disposed between the inlet and the outlet defining an exhaust gas flow passage through the monolithic structure, the sidewall comprising an inner wall and an outer wall defining a sealed cavity therebetween;
- and
- a pillar disposed in the sealed cavity and spanning from the inner wall to the outer wall,
- wherein an outer surface of the exhaust port liner conforms to the inner mounting surface.
A method for fabricating a cylinder head of an internal combustion engine, the method comprising the steps of:
- fabricating an exhaust port liner by:
- receiving by an additive manufacturing system control instructions for fabricating the exhaust port liner comprising:
- a monolithic structure comprising:
- an inlet;
- an outlet disposed at an angle relative to the inlet;
- and
- a sidewall comprising a metal disposed between the inlet and the outlet defining an exhaust gas flow passage through the monolithic structure, the sidewall comprising an inner wall and an outer wall defining a cavity therebetween;
- and
- executing the control instructions by the additive manufacturing system to fabricate the exhaust port liner;
- and
- fabricating a cylinder head frame around the exhaust port liner to fabricate the cylinder head.
Dependencies are inferred from the claim text.