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US 2023/0358189 A1Published application
Cylinder head, cylinder block, internal combustion engine, and method for manufacturing cylinder head
AssigneeMitsubishi Heavy Industries Engine & Turbocharger, Ltd.
InventorsMasayuki IIZUMI, Motoi KAWASHIMA, Takuya KUMAGAI, Makoto SAKAGUCHI, Kazunori SAWAZAKI, Hideho NARITA, Ryuji KATAYAMA
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Abstract
The present invention suppresses leakage of combustion gas from a contact surface. A cylinder head (20) is attached to a cylinder block. The surface (26) of the side of the cylinder head (20) that is attached to the cylinder block includes a first region (AH1) and a second region (AH2) that has higher hardness than the first region (AH1).
Claims2
A cylinder block to be attached to a cylinder head, wherein
- a surface of the cylinder block on a side to be attached to the cylinder head includes a first region and a second region having hardness higher than that of the first region.
Dependencies are inferred from the claim text.