Title:
シリンダ
Document Type and Number:
Japanese Patent JP5297384
Kind Code:
B2
Abstract:
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.
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Inventors:
Mitsuru Urabe
Taiichi Murata
Taiichi Murata
Application Number:
JP2009536086A
Publication Date:
September 25, 2013
Filing Date:
October 02, 2008
Export Citation:
Assignee:
Nippon Piston Ring Co., Ltd.
Hino Motors Ltd.
Hino Motors Ltd.
International Classes:
F02F1/20; F02F1/00; F16J10/04
Domestic Patent References:
| JPS6259743U | 1987-04-14 | |||
| JP2007002989A | 2007-01-11 | |||
| JPS6049243U | 1985-04-06 | |||
| JPH0325073U | 1991-03-14 | |||
| JP2004340330A | 2004-12-02 | |||
| JPS6259743U | 1987-04-14 | |||
| JP2007002989A | 2007-01-11 | |||
| JPS6049243U | 1985-04-06 |
Attorney, Agent or Firm:
Akihiko Yamashita
Kishimoto Tatsuto
Kishimoto Tatsuto
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