发明授权
- 专利标题: Cylinder
- 专利标题(中): 圆筒
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申请号: US12680960申请日: 2008-10-02
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公开(公告)号: US08381696B2公开(公告)日: 2013-02-26
- 发明人: Mitsuru Urabe , Hirokazu Murata
- 申请人: Mitsuru Urabe , Hirokazu Murata
- 申请人地址: JP Saitama JP Tokyo
- 专利权人: Nippon Piston Ring., Ltd.,Hino Jidosha Kabushikikaisha
- 当前专利权人: Nippon Piston Ring., Ltd.,Hino Jidosha Kabushikikaisha
- 当前专利权人地址: JP Saitama JP Tokyo
- 代理机构: Ladas & Parry LLP
- 优先权: JP2007-262737 20071005; JP2008-033380 20080214
- 国际申请: PCT/JP2008/067951 WO 20081002
- 国际公布: WO2009/044824 WO 20090409
- 主分类号: F16J10/04
- IPC分类号: F16J10/04
摘要:
A cylinder realizing reduced reciprocation friction between a piston ring and a bore surface of the cylinder in a region where the piston ring slides. The cylinder in which a piston slides on a bore surface of the cylinder. A plurality of recesses is formed in a stroke center region in the bore surface of the cylinder. The stroke center region is a region between an under face position of a ring groove for a bottom piston ring at a top dead center of the piston and a top face position of a ring groove for a top piston ring at a bottom dead center of the piston. The total of areas of all of the recesses is in the range of 1% to 80% when an area of the stroke center region is 100%, and the recesses are not formed in a region other than the stroke center region of the bore surface of the cylinder.
公开/授权文献
- US20100288222A1 CYLINDER 公开/授权日:2010-11-18