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Title:
PISTON FOR INTERNAL COMBUSTION ENGINE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2018/147188
Kind Code:
A1
Abstract:
Provided is a piston for an internal combustion engine, the piston enabling both an improvement in heat efficiency and a reduction in emissions, and enabling the prevention of overheating of the piston to prevent the occurrence of knocking, pre-ignition, and a drop in air filling efficiency. This piston (100a) for an internal combustion engine constitutes a portion of a combustion chamber (9) of an internal combustion engine (200) and includes a substrate (103), a first film (101) provided on a section of the top surface of the substrate (103) contacting the combustion chamber (9), and a second film (102) provided on another section of the top surface. The piston for the internal combustion engine is characterized in that: the first film (101) has a lower heat conductivity and heat capacity than the substrate (103), and the second film (102) has a lower heat conductivity than the substrate (103) and a higher heat capacity than the first film (101).

Inventors:
SUKEGAWA Yoshihiro (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
TAKAHASHI Norikazu (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
SUGIMOTO Ittou (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
Application Number:
JP2018/003614
Publication Date:
August 16, 2018
Filing Date:
February 02, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
F02F3/12; F02B23/10; F02F3/00; F02F3/10
Domestic Patent References:
WO2016076341A12016-05-19
Foreign References:
JP2011220207A2011-11-04
JP2016186257A2016-10-27
JP2016102457A2016-06-02
JP2010203334A2010-09-16
JP2015081527A2015-04-27
JP2012072746A2012-04-12
JPH1190619A1999-04-06
JP2015222060A2015-12-10
JP2014020301A2014-02-03
JP2010185290A2010-08-26
JPH04231656A1992-08-20
Attorney, Agent or Firm:
POLAIRE I.P.C. (13-11, Nihonbashikayabacho 2-chome Chuo-k, Tokyo 25, 〒1030025, JP)
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