PISTON FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR MANUFACTURING PISTON

WIPO Patent Application WO/2014/017586

A1

[Problem] To provide a piston for an internal combustion engine, whereby requirements for high heat insulating properties and for a high bond strength between a base material of the piston and a low-heat conductivity part can be both satisfied, and a method for manufacturing the piston. [Solution] A piston (1) wherein a low-heat conductivity part (5) comprises a porous member (6), said porous member (6) being configured from borosilicate glass that has a lower heat conductivity than an aluminum alloy base material (1') of the piston (1), and an aluminum alloy material (1a), said aluminum alloy material (1a) being a part of the base material (1') and impregnated in the inside of the porous member. In a method for manufacturing the piston, said method comprising sintering a mixture of a first powder (8), which comprises the glass powder, with a second powder (9), which comprises a sodium chloride powder, to form a molded body, putting the molded body in hot water, thus dissolving the second powder to form voids (9a) in the porous member, and then casting the piston by using a vacuum casting mold, the aluminum alloy is allowed to penetrate into the voids of the porous member and impregnated therein so that the porous member is unified with the base material of the piston and thus the bond strength is enhanced.

SASAKI MASATO (JP)

PCT/JP2013/070175

January 30, 2014

July 25, 2013

Click for automatic bibliography generation  

HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

F02F3/14; F02F3/00; F02F3/26

JPS6245964A	1987-02-27
JP2008267158A	2008-11-06
JPS60240364A	1985-11-29
JP2012072747A	2012-04-12
JPH01108179A	1989-04-25
JPH11193721A	1999-07-21

KOBAYASHI, Hiromichi et al. (JP)
Hiromichi Kobayashi (JP)

View/Download PDF      PDF Help

Previous Patent: ENGINE DUCT, AND AIRCRAFT ENGINE

Next Patent: SEMICONDUCTOR WAFER TRANSFER JIG