Piston ring combination and piston and piston ring combination structure

A combination of piston rings attached to a piston includes a first compression ring, a second compression ring, a third compression ring, and an oil ring, where h1 (1) > = h1 (2) and h1 (1) > = h1 (3) when the axial width of the first compression ring is h1 (1), the axial width of the second compression ring is h1 (2), the axial width of the third compression ring is h1 (3), and h1 (TOTAL) > = 3.1 mm when h1 (TOTAL) = h1 (1) + h1 (2) + h1 (3) + h1 (4). 一种安装于活塞的活塞环的组合，包括第一压缩环、第二压缩环、第三压缩环以及油环，在将第一压缩环的轴向宽度设为h1(1)、将第二压缩环的轴向宽度设为h1(2)、将所述第三压缩环的轴向宽度设为h1(3)、将油环的轴向宽度设为h1(4)时，h1(1)≥h1(2)并且h1(1)≥h1(3)，在设为h1(TOTAL)＝h1(1)+h1(2)+h1(3)+h1(4)时，h1(TOTAL)≥3.1mm。