| 摘要 |
A piston (1) for internal combustion diesel engine having a piston diameter (D) of 180 to 650 mm, the piston (1) comprising a top part (2) and a body part (3) connectable to each others, - the top part (2) defining, when installed in a cylinder of the engine, the piston (1) side of a combustion chamber, and - the body part (3) having an aperture (30) for a gudgeon pin (4), bosses (32) for distributing forces, when in use, between the piston (1) and the gudgeon pin (4), the body part (3) having an interior (33), an outer surface (34) and operable connecting surfaces (35). The interior (33) of the body part (3) comprises an interior wall (or surface) (330) having a macro geometry of wavy (331) surface, where a length (L) of a wave (331) is 3 to 25 mm and a height (h) of a wave (331) is 0,3 to 3 mm, the wavy surface having a micro geometry measurable as a surface roughness of 5 to 9 mum. |
