Title:
内燃エンジン用シリンダの製造方法
Document Type and Number:
Japanese Patent JP4028974
Kind Code:
B2
Abstract:
A cylinder and a method for manufacturing a cylinder for an internal combustion engine is provided which avoids the generation of a step portion at the scavenging port without necessitating enhanced precision of the positioning of the working tools or the working location. A raw cylinder body is cast-molded with the scavenging port portion thereof being left closed. Subsequently, this closed scavenging port portion is cut out (or opened) by means of cutting work, etc. The cutting out of the closed scavenging port portion is performed by widening the cylinder bore side thereof at predetermined angles to the planes of the inner wall of the hollow scavenging passageway formed contiguous to the closed scavenging port portion.
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Inventors:
Fujihiro Matsuura
Koji Fujisawa
Masahiro Inokuma
Koji Fujisawa
Masahiro Inokuma
Application Number:
JP2001280326A
Publication Date:
January 09, 2008
Filing Date:
September 14, 2001
Export Citation:
Assignee:
Kyoritsu Co., Ltd.
International Classes:
F02F1/22; B23K26/00; B23K26/382; B23P13/02; F02B25/16; F02F1/00; F16J10/02; F02B75/02
Domestic Patent References:
| JP11324790A |
Attorney, Agent or Firm:
Yusuke Hiraki
Yasushi Hayakawa
Sekiya Mitsuo
Yasushi Hayakawa
Sekiya Mitsuo