| 摘要 |
An internal combustion engine includes a cylinder block, a cylinder liner, a piston, and a piston ring. The cylinder liner has a cylindrical shape, and is provided inside the cylinder block. The piston is positioned inside the cylinder liner. The piston includes a ring groove and a top land. The ring groove is positioned on an outer periphery of the piston in the vicinity of the top land. The piston ring is arranged inside the ring groove. The cylinder liner includes a first portion and a second portion. The first portion is positioned at least in a part of an inner periphery of the cylinder liner, which faces the top land of the piston when the piston is at a top dead center. The first portion includes a first inner periphery. The first inner periphery has a first radius. The second portion includes a second inner periphery. The second inner periphery has a second radius. The first radius is larger than the second radius by 100 μm to 1000 μm. |
| 主权项 |
1. An internal combustion engine comprising:
a cylinder block; a cylinder liner, the cylinder liner having a cylindrical shape, the cylinder liner being provided inside the cylinder block; a piston, the piston being positioned inside the cylinder liner, the piston including a ring groove and a top land, the ring groove being positioned on an outer periphery of the piston in a vicinity of the top land; and a piston ring, the piston ring being arranged inside the ring groove, the cylinder liner including a first portion and a second portion, the first portion being positioned at least in a part of an inner periphery of the cylinder liner, which faces the top land of the piston when the piston is at a top dead center, the first portion including a first inner periphery, the first inner periphery having a first radius, the second portion including a second inner periphery, the second inner periphery having a second radius, the first radius is larger than the second radius by 100 μm to 1000 μm. |
