Title:
A piston of an internal-combustion engine
Document Type and Number:
Japanese Patent JP6242693
Kind Code:
B2
Abstract:
A piston of an internal combustion engine includes a crown portion; a pair of thrust-side and counter-thrust-side skirt portions; and a pair of apron portions connecting the thrust-side skirt portion with the counter-thrust-side skirt portion. Each of the pair of apron portions includes an upper end wall connected with the crown portion, and a pin boss portion supporting a piston pin. A reverse-surface-side portion of the crown portion is formed with a hollow portion extending along an outer surface of the upper end wall of the apron portion. The upper end wall of the apron portion includes a bending portion between an outside surface of the pin boss portion and a circumferential end of the skirt portion. The bending portion bends in a step-like manner from the outside surface of the pin boss portion toward the circumferential end of the skirt portion.
Inventors:
Toshiyuki Funahashi
Takashi Ide
Toshiro Fushimi
Takashi Ide
Toshiro Fushimi
Application Number:
JP2014005524A
Publication Date:
December 06, 2017
Filing Date:
January 16, 2014
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
F02F3/00; F16J1/04
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Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tsuyoshi Hashimoto
Tomioka Kiyoshi
Tsuyoshi Hashimoto