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Thermal Barrier for a Piston

A thermal barrier and piston technology, applied in the temperature field of ring seals, can solve problems such as the obstruction of excessively high functional temperature of the compression ring

Inactive Publication Date: 2014-12-17
ECOMOTORS INTL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The functionality of the compression rings that maintain the piston can be hindered by excessive temperatures

Method used

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  • Thermal Barrier for a Piston
  • Thermal Barrier for a Piston
  • Thermal Barrier for a Piston

Examples

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Embodiment Construction

[0009] As will be understood by persons of ordinary skill in the art, various features of an embodiment shown and described with reference to any one figure may be combined with features shown in one or more other figures to produce Alternative implementation described. The combinations of features shown provide representative implementations for typical applications. However, various combinations and modifications of the features consistent with the teachings of the invention may be desired for particular applications or implementations. Those of ordinary skill in the art may recognize similar applications or implementations whether or not explicitly described or shown.

[0010] At least one problem in the prior art is that by figure 1 A piston 10 for an internal combustion engine is shown in cross-sectional view. The top 12 of the piston 10 is heated by the flame in the combustion chamber. Measures can be taken to prevent melting of the piston crown 12, which is the subj...

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Abstract

It is important to maintain the temperature in the ring pack area of the piston of an internal combustion engine below about 270° C. to maintain proper ring function and lubrication. Disclosed is a piston with a heat barrier groove between the piston top and the ring pack and a method to construct such a piston. The heat barrier groove extends inwardly toward the center of the piston a greater distance than the compression ring grooves. In one embodiment, a low thermal conductivity material is placed in the inner portion of the heat barrier groove and a split ring is place in the outer portion. In another embodiment, a gas is provided in the inner portion and the split ring is welded to the piston so that the inner portion of the heat barrier groove is sealed, i.e., welding at the upper and lower edges and at the gap.

Description

technical field [0001] The invention relates to reducing the temperature in the ring seal of a piston. Background technique [0002] The functionality of the compression rings maintaining the piston is hindered by excessive temperatures. A piston design that protects the ring seal area from high temperatures is desired. Contents of the invention [0003] To overcome at least one of the problems of the prior art, a piston assembly is disclosed having a piston having a piston crown, a generally cylindrical skirt, and a ring seal region in a cylindrical body having a first A compression ring groove, a second compression ring groove, and a thermal barrier groove extending inwardly further than the compression ring groove. The piston assembly also has a first compression ring disposed in the first compression ring groove, a second compression ring disposed in the second compression ring groove, and a split ring disposed in an exterior of the thermal barrier groove. Split rin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00F02F5/00
CPCF02F2200/00F02F3/0015F05C2251/048Y10T29/49249F02F3/00F02F5/00
Inventor P·霍夫鲍尔D·布雷霍布
Owner ECOMOTORS INTL