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公开(公告)号:US20180100464A1
公开(公告)日:2018-04-12
申请号:US15818122
申请日:2017-11-20
发明人: Chikara OIWA , Akihiro IMAI , Katsuyuki OSAWA , Masato ISHIWATA
CPC分类号: F02F3/0084 , B24C1/10 , B24C3/325 , C21D7/06 , C22C21/02 , C22F1/04 , C22F1/043 , F02F3/00 , F16J1/16
摘要: A pin bore is formed on a piston of the internal combustion engine, wherein the piston is connected with a connecting rod through a piston pin, and includes pin bosses through which the pin bore is formed for receiving the piston pin. The piston is casted from aluminum silicon alloy. At least the piston center side portion of the pin bore is formed from the taper hole such that the piston center side is large. Dimple process is applied on the inner surface of the pin bore, wherein the recesses by the dimple process are a lubrication oil reservoir. Also, the first phase silicon crystal in the piston matrix is minimized by the dimple process for forming the minimized layer on the inner surface of the pin bore.
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2.
公开(公告)号:US20160115898A1
公开(公告)日:2016-04-28
申请号:US14895340
申请日:2014-04-23
发明人: Chikara OIWA , Akihiro IMAI , Katsuyuki OSAWA , Masato ISHIWATA
IPC分类号: F02F3/00
摘要: A piston of this invention is casted from aluminum silicon alloy, a piston center side portion and the piston peripheral side portion of the pin bore 20 formed on the pin boss 18 are formed with the tapers 27, 28, and recesses 33 are formed on the inner surface of the pin bore 20 excepting the area near the engaging ring grooves 24, through the dimple process, and the first phase silicon crystal in the piston matrix is minimized by the dimple process and the inner surface of the pin bore 20 is reinforced by the minimized layer.
摘要翻译: 本发明的活塞由铝硅合金铸造,活塞中心侧部分,并且形成在销凸台18上的销孔20的活塞周边部分形成有锥形部分27,28,并且凹部33形成在 销孔20的内表面,除了接合环槽24附近的区域,通过凹坑工艺,并且通过凹坑工艺使活塞矩阵中的第一相硅晶体最小化,并且销孔20的内表面被 最小化的层。
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