公开(公告)号：US20160169152A1

公开(公告)日：2016-06-16

申请号：US14567144

申请日：2014-12-11

Applicant: CATERPILLAR INC.

Inventor： Lucas Burger ,  Andrew Palmer ,  Brandon Bowditch ,  Andrew Loetz

IPC: F02F3/28

CPC classification number: F02F3/28 ,  F02F3/00

Abstract: A piston includes a piston body forming a crown portion and a skirt portion, the crown portion forming a bowl surrounded by a flat crown surface having an annular shape and disposed along a plane, the bowl and the flat crown surface meeting along a rim of the bowl having a generally circular shape. A generally cylindrical surface surrounds the crown portion and forms at least two grooves that define top and bottom land surfaces. The top land surface has a height along a centerline of the piston, and the piston 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 surface and the inner diameter of the bore is between 3% and 4.5%.

Abstract translation: 活塞包括形成冠部和裙部的活塞体，所述冠部形成由具有环形形状并且沿着平面设置的扁平冠状表面包围的碗，所述碗和平坦的冠表面沿着 碗具有大致圆形的形状。 大致圆柱形表面围绕冠部并且形成限定顶部和底部表面的至少两个凹槽。 顶部陆面表面具有沿着活塞中心线的高度，并且活塞具有构造​​成在具有内径的孔内往复运动的标称外径，使得顶部表面的高度与内部直径之间的比率 孔径在3％至4.5％之间。

公开(公告)号：US20160169153A1

公开(公告)日：2016-06-16

申请号：US14567159

申请日：2014-12-11

Applicant: Caterpillar Inc.

Inventor： Lucas Burger ,  Andrew Palmer ,  Brandon Bowditch

IPC: F02F3/28 ,  F02F3/00

CPC classification number: F02F3/28 ,  F02F3/00 ,  F02F3/0069

Abstract: A piston for an internal combustion engine includes a piston body forming a crown portion and a skirt portion. The skirt portion includes a pin bore and forms two guide surfaces. The crown portion forms a cylindrical surface having at least two grooves defining a top land surface and a bottom land surface. A ratio between a height of the top land surface and a nominal inner diameter of a bore in which the piston is configured to operate is between 3% and 4.5%. Further, the pin bore has a diameter that extends entirely within the respective heights of the two guide surfaces along the centerline of the piston such that the skirt portion fully supports the piston.

Abstract translation: 用于内燃机的活塞包括形成冠部和裙部的活塞体。 裙部包括销孔并形成两个引导表面。 冠部形成具有限定顶部表面和底部表面的至少两个凹槽的圆柱形表面。 顶部表面表面的高度与其中活塞被构造成操作的孔的标称内径之间的比率在3％和4.5％之间。 此外，销孔具有沿着活塞的中心线完全延伸在两个引导表面的相应高度内的直径，使得裙部完全支撑活塞。