公开(公告)号：US5211101A

公开(公告)日：1993-05-18

申请号：US718018

申请日：1991-06-20

Applicant: Thomas Letsch ,  Jorn Weipert ,  Eduart Steppat

Inventor： Thomas Letsch ,  Jorn Weipert ,  Eduart Steppat

IPC: F02F3/00

CPC classification number: F02F3/0069 ,  F05C2201/0448

Abstract: A piston for an internal combustion engine with a separate head and skirt which are joined by the piston pin. At least one of the upper lands has a reduced diametrical clearance with the cylinder wall in an area perpendicular to the pin direction. The bottom land has a reduced diametrical clearance with the cylinder wall in the pin direction. The lands are oval shaped, the bottom land optionally a truncated oval. At least one of the upper lands can have the shape of two ovals offset by 90.degree. like a cloverleaf.

Abstract translation: 一种用于内燃机的活塞，其具有由活塞销接合的单独头部和裙部。 至少一个上部平台在垂直于销方向的区域中与气缸壁具有减小的直径间隙。 底部平台与柱面壁在销方向上具有减小的直径间隙。 土地是椭圆形，底部任意地是截顶的椭圆形。 上部土地中的至少一个可以具有像三叶草一样偏移90°的两个椭圆形状。