| 摘要 |
A piston (100) includes a piston (100) body forming a crown portion (102) and a skirt portion (104), the crown portion (102) forming a bowl (114) surrounded by a flat crown surface (118) having an annular shape and disposed along a plane, the bowl (114) and the flat crown surface (118) meeting along a rim (116) of the bowl (114) having a generally circular shape. A generally cylindrical surface surrounds the crown portion (102) and forms at least two grooves that define top and bottom land surfaces. The top land (128) surface has a height along a centerline of the piston (100), and the piston (100) has a nominal outer diameter configured to reciprocally operate within a bore having an inner diameter such that a ratio between the height of the top land (128) surface and the inner diameter of the bore is between 3% and 4.5%. |
