INTERNAL COMBUSTION ENGINE AND MANUFACTURING METHOD THEREFOR
First Claim
Patent Images
1. An internal combustion engine comprising:
- an anodic oxide film forming on part or all of an aluminum-based wall surface facing a combustion chamber, whereinan aluminum-based material that forms the aluminum-based wall surface contains Si and Cu as an alloy component, a content of Si in the aluminum-based material is higher than or equal to 5% and less than 20% and a content of Cu in the aluminum-based material is higher than or equal to 0.4% and less than 7%,the anodic oxide film has a thickness of 30 μ
m to 170 μ
m;
the anodic oxide film has first micropores having a micro-size diameter, nanopores having a nano-size diameter and second micropores having a micro-size diameter, the first micropores and second micropores have a sectional diameter or maximum size of a range of 1 to 100 μ
m and the nanopores have a sectional diameter or maximum size of a range of 10 to 100 nm, the first micropores and the nanopores extending from a surface of the anodic oxide film toward an inside of the anodic oxide film in a thickness direction of the anodic oxide film or substantially the thickness direction, the second micropores being provided inside the anodic oxide film;
at least part of the first micropores and the nanopores are sealed with a seal that is converted from a sealant,at least part of the second micropores are not sealed; and
the anodic oxide film sealed with the seal has a porosity of 20 to 70%.
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Accused Products
Abstract
In an internal combustion engine in which an anodic oxide film (10) is formed on part or all of a wall surface facing a combustion chamber, the anodic oxide film (10) has a thickness of 30 μm to 170 μm, the anodic oxide film (10) has first micropores (1a) having a micro-size diameter, nanopores having a nano-size diameter and second micropores (1b) having a micro-size diameter, the first micropores (1a) and the nanopores extending from a surface of the anodic oxide film (10) toward an inside of the anodic oxide film (10) in a thickness direction of the anodic oxide film (10) or substantially the thickness direction, the second micropores (1b) being provided inside the anodic oxide film (10), at least part of the first micropores (1a) and the nanopores are sealed with a seal (2) converted from a sealant (2), and at least part of the second micropores (1b) are not sealed.
11 Citations
10 Claims
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1. An internal combustion engine comprising:
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an anodic oxide film forming on part or all of an aluminum-based wall surface facing a combustion chamber, wherein an aluminum-based material that forms the aluminum-based wall surface contains Si and Cu as an alloy component, a content of Si in the aluminum-based material is higher than or equal to 5% and less than 20% and a content of Cu in the aluminum-based material is higher than or equal to 0.4% and less than 7%, the anodic oxide film has a thickness of 30 μ
m to 170 μ
m;the anodic oxide film has first micropores having a micro-size diameter, nanopores having a nano-size diameter and second micropores having a micro-size diameter, the first micropores and second micropores have a sectional diameter or maximum size of a range of 1 to 100 μ
m and the nanopores have a sectional diameter or maximum size of a range of 10 to 100 nm, the first micropores and the nanopores extending from a surface of the anodic oxide film toward an inside of the anodic oxide film in a thickness direction of the anodic oxide film or substantially the thickness direction, the second micropores being provided inside the anodic oxide film;at least part of the first micropores and the nanopores are sealed with a seal that is converted from a sealant, at least part of the second micropores are not sealed; and the anodic oxide film sealed with the seal has a porosity of 20 to 70%. - View Dependent Claims (3, 4, 5)
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2. (canceled)
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6. A manufacturing method for an internal combustion engine, comprising:
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a first step of forming an anodic oxide film on part or all of an aluminum-based wall surface facing a combustion chamber, the anodic oxide film having first micropores having a micro-size diameter, nanopores having a nano-size diameter and second micropores having a micro-size diameter, the first micropores and second micropores having a sectional diameter or maximum size of a range of 1 to 100 μ
m and the nanopores having a sectional diameter or maximum size of a range of 10 to 100 nm, the first micropores and the nanopores extending from a surface of the anodic oxide film toward an inside of the anodic oxide film in a thickness direction of the anodic oxide film or substantially the thickness direction, the second micropores being provided inside the anodic oxide film, the anodic oxide film having a thickness of 30 μ
m to 170 μ
m; anda second step of forming the anodic oxide film subjected to sealing in which a sealant is applied to the surface of the anodic oxide film, the sealant penetrates into at least part of the first micropores and the nanopores, the sealant is converted into a seal, at least part of the first micropores and the nanopores are sealed with the seal and at least part of the second micropores are not sealed wherein an aluminum-based material that forms the aluminum-based wall surface contains Si and Cu as an alloy component, a content of Si in the aluminum-based material is higher than or equal to 5% and less than 20% and a content of Cu in the aluminum-based material is higher than or equal to 0.4% and less than 7%; and the anodic oxide film sealed with the seal has a porosity of 20 to 70%. - View Dependent Claims (8, 9, 10)
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7. (canceled)
Specification
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Current AssigneeToyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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Original AssigneeToyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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InventorsNISHIKAWA, Naoki, MAKINO, Hiroshi, TAKAGISHI, Reona, KAWAGUCHI, Akio, WAKISAKA, Yoshifumi, SHIMIZU, Fumio, HORIE, Toshio
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current1/1
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CPC Class CodesC22C 21/02 with silicon as the next ma...C22C 21/06 with magnesium as the next ...C25D 11/04 of aluminium or alloys base...C25D 11/18 After-treatment, e.g. pore-...C25D 11/246 for sealing layersF02B 77/11 Thermal or acoustic insulationF02F 1/24 Cylinder headsF02F 3/12 on piston headsF05C 2203/0869 Aluminium oxide
