An air-gap-insulated piston designed for reduced heat loss was evaluated by examining its influence on the coolant heat rejection, engine performance and exhaust emissions of a single-cylinder divided-chamber diesel engine. At 1000 and 1500 r/min engine speed, use of the low-heat-rejection (LHR) piston resulted in a reduction in total coolant heat rejection ranging from 3% at light load to 5-7% at full load, in a general reduction in hydrocarbons, carbon monoxide and smoke emissions, in an increase in oxides of nitrogen, and in a significant improvement in brake specific fuel consumption only at light loads. It was estimated that the LHR piston design reduced the piston-crown surface heat transfer by an amount equivalent to from 3.5% (full load) to 5.5% (light load) of the input fuel energy at 1000 r/min.


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    Titel :

    Evaluation of an Air-Gap-Insulated Piston in a Divided-Chamber Diesel Engine


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:
    Alkidas, A. C. (Autor:in) / Cole, R. M. (Autor:in)

    Kongress:

    SAE International Congress and Exposition ; 1985



    Erscheinungsdatum :

    25.02.1985




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Evaluation of an air-gap-insulated piston in a divided-chamber diesel engine

    Cole,R.M. / Alkidas,A.C. / General Motors Research Lab.,US | Kraftfahrwesen | 1985


    Thermodynamic analysis of a divided combustion chamber Diesel engine

    Kouremenos,D.A. / Rakopoulos,C.D. / Hountalas,D. et al. | Kraftfahrwesen | 1988


    Inventory of heat losses for a divided-chamber Diesel engine

    Cole,R.M. / Alkidas,A.C. / General Motors Res.Lab.,US | Kraftfahrwesen



    Inventory of Heat Losses for a Divided–Chamber Diesel Engine

    Alkidas, A. C. / Cole, R. M. | SAE Technical Papers | 1982