公开(公告)号：US20150198112A1

公开(公告)日：2015-07-16

申请号：US14579325

申请日：2014-12-22

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Toshiyuki FUNAHASHI ,  Takashi IDE ,  Toshiro FUSHIMI

IPC: F02F3/00

CPC classification number: F02F3/0069 ,  F02B3/06 ,  F02F3/00 ,  F02F3/0076 ,  F02F3/02 ,  F02F3/22 ,  F05C2201/021 ,  F05C2201/0448

Abstract: A piston of an internal combustion engine includes a crown portion; a pair of thrust-side and counter-thrust-side skirt portions; and a pair of apron portions connecting the thrust-side skirt portion with the counter-thrust-side skirt portion. Each of the pair of apron portions includes an upper end wall connected with the crown portion, and a pin boss portion supporting a piston pin. A reverse-surface-side portion of the crown portion is formed with a hollow portion extending along an outer surface of the upper end wall of the apron portion. The upper end wall of the apron portion includes a bending portion between an outside surface of the pin boss portion and a circumferential end of the skirt portion. The bending portion bends in a step-like manner from the outside surface of the pin boss portion toward the circumferential end of the skirt portion.

Abstract translation: 内燃机的活塞包括冠部; 一对推力侧和反推力侧裙部; 以及连接推力侧裙部与反推力侧裙部的一对围裙部。 一对挡板部分中的每一个包括与冠部连接的上端壁和支撑活塞销的销毂部。 冠部的反面侧部形成有沿着裙环部的上端壁的外表面延伸的中空部。 围裙部分的上端壁包括在凸台部分的外表面和裙部之间的周向端部之间的弯曲部分。 弯曲部从台阶部的外表面向裙部的周向端部呈阶梯状地弯曲。

公开(公告)号：US20190076913A1

公开(公告)日：2019-03-14

申请号：US16082528

申请日：2017-01-20

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Yuto HIGASA ,  Shin KOIZUMI ,  Minoru ZENKE ,  Takashi IDE

IPC: B21K1/18 ,  F16J1/16

Abstract: Pin body has lightening hole having one-end-side and another-end-side large diameter parts formed on both end sides in the longitudinal direction; a central small diameter part; one-end-side and another-end-side first rounded parts each being provided between the large diameter part and the central small diameter part, having an inner diameter decreasing from each large diameter part side toward the central small part side, and having a rate of change of the inner diameter increasing from each large diameter part side toward the central small diameter part side; and one-end-side and another-end-side second rounded parts each being provided between each first rounded part and the central small diameter part, having an inner diameter decreasing from each first rounded part toward the central small diameter part side, and having a rate of change of the inner diameter decreasing from each first rounded part toward the central small diameter part side.