Title:
PISTON FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR MANUFACTURING PISTON FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2018/037616
Kind Code:
A1
Abstract:
Provided is a piston for an internal combustion engine, in which cylinder or piston wear can be minimized. This piston for an internal combustion engine has a main body and a low-thermal-conductivity part. The main body, which contains an aluminum alloy, has a piston head, a piston boss, and a piston skirt. The low-thermal-conductivity part is located on a combustion-chamber side of the piston head, and comprises at least one of carbon, boron nitride, and molybdenum disulfide. The low-thermal-conductivity part has a gap in the interior thereof. The piston for an internal combustion engine is provided with a main body part formed from an aluminum alloy. The main body part has a piston head part, and a piston boss part and piston skirt part provided to the side of the piston head part opposite from the combustion chamber of the internal combustion engine. The piston furthermore is provided with a low-thermal-conductivity part that: is provided on the side of the piston head adjacent to the combustion chamber of the internal combustion engine; is formed from a low-thermal-conductivity-part-forming material containing carbon, boron nitride, or molybdenum disulfide; and has a gap in the interior thereof.
Inventors:
SHISHIDO KEITAROU (JP)
Application Number:
PCT/JP2017/014608
Publication Date:
March 01, 2018
Filing Date:
April 10, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02F3/10; F02F3/00; F02F3/14; F16J1/01
Foreign References:
| JP2013164028A | 2013-08-22 | |||
| JP2016125082A | 2016-07-11 | |||
| JP2015224362A | 2015-12-14 | |||
| JP2009243352A | 2009-10-22 | |||
| JPS5912119A | 1984-01-21 |
Attorney, Agent or Firm:
ONO, Shinjiro et al. (JP)
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