Title:
内燃機関用ピストン及びピストンリング
Document Type and Number:
Japanese Patent JP6422526
Kind Code:
B2
Abstract:
A piston includes a piston body and a piston ring fitted into a ring groove. The piston ring has a top surface that includes: a convex portion formed between an inner edge position and a central position at which a radial direction thickness is ½, with the piston ring in a free state, and a planar portion or an inclined peripheral portion continuous with the convex portion on a radially outer side of the convex portion. In a predetermined status of the piston body and the piston ring, an angle between the top surface of the ring groove and the planar portion or the inclined peripheral portion is at least 18 arcminutes in a cross-section that is parallel to a central axis of the piston body and includes the central axis.
Inventors:
Kazuyuki Fushimi
Yoshitaka Watanabe
Kazuki Sato
Yoshitaka Watanabe
Kazuki Sato
Application Number:
JP2017068841A
Publication Date:
November 14, 2018
Filing Date:
March 30, 2017
Export Citation:
Assignee:
Riken Co., Ltd.
Honda Metal Technology Co., Ltd.
Honda Metal Technology Co., Ltd.
International Classes:
F16J9/20; F02F5/00
Domestic Patent References:
| JP57123938U | ||||
| JP5965959U | ||||
| JP2001182831A | ||||
| JP11182679A |
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Yasuyuki Komatsu
Mitsutsugu Sugimura
Yasuyuki Komatsu
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