Title:
INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2020007929
Kind Code:
A
Abstract:
To provide an internal combustion engine in which an anodic oxide film having satisfactory thermal insulation properties and swing characteristics is formed.SOLUTION: In an internal combustion engine in which an anodic oxide film is formed at least at a part of an aluminum system wall face facing a combustion chamber, the anodic oxide film has a plurality of nano holes extending nearly in a thickness direction of the anodic oxide film toward the inside from a surface of the anodic oxide film, a first micro hole extending toward the inside from the surface of the anodic oxide film, and a second micro hole existing in the anodic oxide film. Surface opening diameters of the nano holes at the surface of the anodic oxide film is 0 nm or larger and smaller than 30 nm, internal opening diameters of the inside of the nano holes are larger than the surface opening diameters, a film thickness of the anodic oxide film is 15 μm to 130 μm, and the porosity of the anodic oxide film is 23% or higher.SELECTED DRAWING: Figure 1
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Inventors:
NISHIKAWA NAOKI
KAWAGUCHI AKIO
YAMASHITA HIDEO
TANAKA KEISUKE
HORIE TOSHIO
WAKIZAKA YOSHIFUMI
SHIMIZU FUMIO
KAWAGUCHI AKIO
YAMASHITA HIDEO
TANAKA KEISUKE
HORIE TOSHIO
WAKIZAKA YOSHIFUMI
SHIMIZU FUMIO
Application Number:
JP2018127729A
Publication Date:
January 16, 2020
Filing Date:
July 04, 2018
Export Citation:
Assignee:
TOYOTA MOTOR CORP
TOYOTA CENTRAL RES & DEV
TOYOTA CENTRAL RES & DEV
International Classes:
F02F3/10; F02F1/00; F02F3/00; F02F3/12; F02F3/14; F16J1/00; F16J10/00
Domestic Patent References:
| JP2015031226A | 2015-02-16 | |||
| JP2017122271A | 2017-07-13 | |||
| JP2013060620A | 2013-04-04 |
Attorney, Agent or Firm:
Hiraki International Patent Office