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    Piston for internal combustion engine
    1.
    发明授权
    Piston for internal combustion engine 有权
    内燃机活塞

    公开(公告)号：US07398754B2

    公开(公告)日：2008-07-15

    申请号：US11524271

    申请日：2006-09-21

    申请人： Akito Tanihata ,  Naoko Sato ,  Hisayasu Kojima ,  Kouji Katsumata ,  Takashi Shiraishi

    发明人： Akito Tanihata ,  Naoko Sato ,  Hisayasu Kojima ,  Kouji Katsumata ,  Takashi Shiraishi

    IPC分类号： F02F3/00

    CPC分类号： B22D17/2069 ,  B22D21/007 ,  F02B75/08 ,  F02F3/0084 ,  F02F2200/06 ,  F05C2201/903 ,  Y10T29/49261

    摘要： A piston for internal combustion engine has both fatigue strength and wear resistance without increased production cost. At least one of a combustion chamber surface, a skirt rib, a pin boss rib which connects a pin boss and a crown, a lower portion of the pin boss casting surface, and a surface layer including the casting surface is a first eutectic structure in which primary crystal Si does not crystallize. A top ring groove and a pin holing of a piston pin are finished surfaces obtained by eliminating the surface layer by means of machining. The layer including the finished surface is a second eutectic structure in which the primary crystal Si crystallizes.

    摘要翻译： 用于内燃机的活塞具有疲劳强度和耐磨性，而不增加生产成本。 燃烧室表面，裙边肋，连接销凸台和表冠的销凸起肋，销凸台铸造表面的下部和包括铸造表面的表面层中的至少一个是第一共晶结构 主晶Si不结晶。 活塞销的顶环槽和针孔是通过机械加工消除表面层而获得的成品表面。 包含成品表面的层是第一共晶结构，其中初晶Si结晶。

    Piston for internal combustion engine
    2.
    发明申请
    Piston for internal combustion engine 有权
    内燃机活塞

    公开(公告)号：US20070062479A1

    公开(公告)日：2007-03-22

    申请号：US11524271

    申请日：2006-09-21

    申请人： Akito Tanihata ,  Naoko Sato ,  Hisayasu Kojima ,  Kouji Katsumata ,  Takashi Shiraishi

    发明人： Akito Tanihata ,  Naoko Sato ,  Hisayasu Kojima ,  Kouji Katsumata ,  Takashi Shiraishi

    IPC分类号： F02B75/08 ,  F02F3/00 ,  F16J1/04

    CPC分类号： B22D17/2069 ,  B22D21/007 ,  F02B75/08 ,  F02F3/0084 ,  F02F2200/06 ,  F05C2201/903 ,  Y10T29/49261

    摘要： A piston for internal combustion engine has both fatigue strength and wear resistance without increased production cost. At least one of a combustion chamber surface, a skirt rib, a pin boss rib which connects a pin boss and a crown, a lower portion of the pin boss casting surface, and a surface layer including the casting surface is a first eutectic structure in which primary crystal Si does not crystallize. A top ring groove and a pin holing of a piston pin are finished surfaces obtained by eliminating the surface layer by means of machining. The layer including the finished surface is a second eutectic structure in which the primary crystal Si crystallizes.

    摘要翻译： 用于内燃机的活塞具有疲劳强度和耐磨性，而不增加生产成本。 燃烧室表面，裙边肋，连接销凸台和表冠的销凸起肋，销凸台铸造表面的下部和包括铸造表面的表面层中的至少一个是第一共晶结构 主晶Si不结晶。 活塞销的顶环槽和针孔是通过机械加工消除表面层而获得的成品表面。 包含成品表面的层是第一共晶结构，其中初晶Si结晶。