Invention Grant
- Patent Title: Oil ring and piston for an internal combustion engine
- Patent Title (中): 用于内燃机的油环和活塞
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Application No.: US13000453Application Date: 2009-06-15
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Publication No.: US08739753B2Publication Date: 2014-06-03
- Inventor: Tsuyoshi Higuchi , Yutaka Mabuchi , Makoto Yoshida
- Applicant: Tsuyoshi Higuchi , Yutaka Mabuchi , Makoto Yoshida
- Applicant Address: JP Yokohama-shi
- Assignee: Nissan Motor Co., Ltd.
- Current Assignee: Nissan Motor Co., Ltd.
- Current Assignee Address: JP Yokohama-shi
- Agency: Foley & Lardner LLP
- Priority: JP2008-163227 20080623; JP2009-075849 20090326
- International Application: PCT/JP2009/060830 WO 20090615
- International Announcement: WO2009/157328 WO 20091230
- Main IPC: F02F3/00
- IPC: F02F3/00 ; F01M9/10
Abstract:
An oil ring Ro for an internal combustion engine according to the present invention includes at least one selected from the group consisting of hard carbon, CrN and TiN that covers an outer periphery 1 of the oil ring. A radius of curvature R at an outermost portion T of the oil ring in a sliding direction is 0.3 mm or more.
Public/Granted literature
- US20110100318A1 OIL RING AND PISTON FOR AN INTERNAL COMBUSTION ENGINE Public/Granted day:2011-05-05
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