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.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    The Development of An Air Gap Insulated Piston


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE International Congress and Exposition ; 1987



    Publication date :

    1987-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    AE Announces Insulated Piston

    AE Group,US | Automotive engineering | 1984


    The development of an air gap insulated piston

    Parker,D.A. / Donnison,G.M. | Automotive engineering | 1987


    Insulated Composite Piston From Perfect Circle

    Wilson,R. / Perfect Circle,Dana,US | Automotive engineering | 1984


    Advanced Insulated Titanium Piston for Adiabatic Engine

    Schwarz, Ernest / Woods, Melvin / Glance, Paul | SAE Technical Papers | 1990


    Advanced insulated titanium piston for adiabatic engine

    Woods,M. / Glance,P. / Schwarz,E. et al. | Automotive engineering | 1990