公开(公告)号：US20220025829A1

公开(公告)日：2022-01-27

申请号：US17296877

申请日：2019-07-23

Applicant: TPR CO., LTD. ,  TPR INDUSTRY CO., LTD.

Inventor： Yuki KUROMASA ,  Koichi HATAKEYAMA ,  Takashi OZAWA

IPC: F02F1/00 ,  B24B33/02 ,  F02F1/20 ,  C22C37/00 ,  C22C33/08

Abstract: A cylinder liner of the present invention is a cylinder liner mounted on a cylinder block and formed of flaky graphite cast iron, at least a nitrided layer is provided on an inner periphery of the cylinder liner, and a cross hatching section is formed on the inner periphery, a roughness curve of the inner periphery has a plateau honing shape, a ten-point average roughness Rz of the inner periphery pursuant to JIS B0601:1982 is 4.0 μm or less, and an average value of an area ratio of pits generated in the inner periphery is 8% or less.