Piston with a lightweight construction that is subjected to high thermal stress
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United States of America Patent
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Mar 1, 2011
Grant Date -
Jun 12, 2008
app pub date -
Nov 8, 2005
filing date -
Nov 26, 2004
priority date (Note) -
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Abstract
The invention relates to a piston of an internal combustion engine comprising an upper part (1) and a lower part (3) that consist of a respective light metal alloy (15) and to an associated method for increasing the thermal load-bearing capacity of a multi-part piston that is subjected to high thermal stress in an internal combustion engine. The piston is provided with at least one insulating element, in particular a gap (7) between the lower part (3) and the upper part (1), at least one piston ring carrier (6), which consists of a different material from that of the upper part (1) and the lower part (3), in particular of steel or grey cast iron, being located next to said gap as a component. A thermal current that is introduced into the piston base (2) is prevented from dissipating via the piston ring carrier (6) by means of the insulating element.
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