Browse Publications Technical Papers 870652
1987-02-01

The Development of An Air Gap Insulated Piston 870652

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.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Significant Properties of Gasketing Materials - Pathfinders for Proper Material Selection

680500

View Details

TECHNICAL PAPER

Effects of the Metal Surface Profile to the Sliding Properties between Rubber and Metal and Applying That to Wheel Bearing Seals

2018-01-1904

View Details

TECHNICAL PAPER

Performance of Ceramic Bearings in High Speed Turbine Application

901629

View Details

X