COOLING STRUCTURE OF INTERNAL COMBUSTION ENGINE
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United States of America Patent
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Issued Date -
Jul 13, 2023
app pub date -
Nov 7, 2022
filing date -
Jan 7, 2022
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Abstract
A cooling structure of an internal combustion engine includes a cylinder block including a water jacket, the water jacket having a first inner wall and a second inner wall facing each other, and a spacer disposed in the water jacket, the spacer having a first surface and a second surface facing each other, wherein at least one of the first and second surfaces of the spacer, at least one of the first and second inner walls of the water jacket, or any combination thereof has a first region, a second region, and a third region, the first region is closer to a combustion chamber of the internal combustion engine than the second region, and the second region is closer to the combustion chamber than the third region, and has a larger surface roughness than the first region and the third region.
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