Title:
PISTON FOR INTERNAL COMBUSTION ENGINES
Document Type and Number:
WIPO Patent Application WO/2017/142007
Kind Code:
A1
Abstract:
[Problem] The present invention provides a piston for internal combustion engines, the piston being configured so that: the piston can be efficiently cooled by reliably conducting a required amount of cooling oil to a portion requiring cooling; and the piston can be reduced in weight.
[Solution] A piston 3 has a piston crown 24 having a top 21, and a pair of piston bosses respectively having piston pin holes in which piston pins are inserted, and the piston 3 is cooled by cooling oil ejected toward the rear surface 30a of the top 21 from an oil jet device having a nozzle. The top 21 has: cooling cavities 29a, 29b provided inside the top 21 at positions near at least one of the pin bosses; and inlet openings 35a, 35b provided in the rear surface 30a of the top 21 and conducting to the cooling cavities 29a, 29b oil ejected from the nozzle.
Inventors:
NOGUCHI TAKUYA (JP)
KIKUCHI YUKIHIRO (JP)
KIKUCHI YUKIHIRO (JP)
Application Number:
PCT/JP2017/005651
Publication Date:
August 24, 2017
Filing Date:
February 16, 2017
Export Citation:
Assignee:
ART METAL MFG CO LTD (JP)
International Classes:
F02F3/22; F02F3/00; F16J1/09
Foreign References:
| JP2014084790A | 2014-05-12 | |||
| JP2007278220A | 2007-10-25 | |||
| JP2010096087A | 2010-04-30 | |||
| JP2006214297A | 2006-08-17 | |||
| JP2009191779A | 2009-08-27 | |||
| JP2005048650A | 2005-02-24 | |||
| JPS5379909U | 1978-07-03 | |||
| US20080289490A1 | 2008-11-27 |
Attorney, Agent or Firm:
SHIMIZU, Yoshihiro (JP)
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