Piston for internal combustion engine

Details Piston for internal combustion engine Piston for internal combustion engine

2008-07-15

2008-07-15

McMahon, M. (Department: 3747)

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

C029S888047

Reexamination Certificate

active

07398754

ABSTRACT:
A piston for internal combustion engine has both fatigue strength and wear resistance without increased production cost. At least one of a combustion chamber surface, a skirt rib, a pin boss rib which connects a pin boss and a crown, a lower portion of the pin boss casting surface, and a surface layer including the casting surface is a first eutectic structure in which primary crystal Si does not crystallize. A top ring groove and a pin holing of a piston pin are finished surfaces obtained by eliminating the surface layer by means of machining. The layer including the finished surface is a second eutectic structure in which the primary crystal Si crystallizes.

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patent: 2004/0057865 (2004-03-01), Ikuno et al.
patent: 2006/0266443 (2006-11-01), Oka et al.
patent: 10-219378 (1998-08-01), None
patent: 3043375 (2000-03-01), None
patent: 2005-120891 (2005-05-01), None

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