The Development of An Air Gap Insulated Piston

870652

02/01/1987

Event
SAE International Congress and Exposition
Authors Abstract
Content
The concept of an air gap insulated piston has been explored using bolted and welded/roll bonded designs. Pistons with bolted on crowns demonstrated the effectiveness of air gap insulation, but roll bonded and welded designs were found to be more robust and to provide the complete sealing of the air gap necessary for continued insulation. Evolution of the design to combine high insulation with adequate durability is discussed.
Engine running times of up to 200 hours at full load have been achieved for an air gap piston which reduces heat flow to the crown by 33%. An improved design giving 41% reduction of heat flow has been tested for 78 hours at full engine load with no evident deterioration. Development is continuing to provide a fully durable piston achieving up to 50% reduction in heat flow.
Meta TagsDetails
DOI
https://doi.org/10.4271/870652
Pages
12
Citation
Parker, D., and Donnison, G., "The Development of An Air Gap Insulated Piston," SAE Technical Paper 870652, 1987, https://doi.org/10.4271/870652.
Additional Details
Publisher
Published
Feb 1, 1987
Product Code
870652
Content Type
Technical Paper
Language
English