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    Nature and Reduction of Cycle-to-Cycle Combustion Engine with Ethanol-Diesel Fuel Blends

    Nature and Reduction of Cycle-to-Cycle Combustion Engine with Ethanol-Diesel Fuel Blends


    Many of the promissing alternative fuels have relatively low cetane numbers, and may-result in combustion variation problems. This paper presents the chracteristics of the cycle-to-cycle combustion variations in diesel engines, and analyzes and evaluates the mechanism.Combustion variations appear in various forms, such as variations in ignition lag, indicated mean effective pressure, maximum combustion pressure, or rate of heat release. These variations are clearly correlated, and it is possible to represent the combustion variations by the standard deviation in the combustion peak pressure. The combustion variations are random (non-periodic), and are affected by ethanol amount, intake air temperature, engine speed and other various operating conditions. Theoretical analysis based on auto ignition theory showed that all of these factors affecting the combustion variations could be correlated with ignition lag; a reduction in ignition lag is the most effective to reduce combustion variation.

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    Title :

    Nature and Reduction of Cycle-to-Cycle Combustion Engine with Ethanol-Diesel Fuel Blends

    Additional title:

    Sae Technical Papers

    Contributors:
    Miyamoto, Noboru (author) / Murayama, Tadashi (author) / Yamada, Takanobu (author) / Chikahisa, Takemi (author)
    Conference:

    1983 SAE International Off-Highway and Powerplant Congress and Exposition ; 1983

    Published in:

    Sae Technical Paper Series

    Publication date :

    1983-09-12

    ISSN :

    2688-3627 , 0148-7191

    DOI :

    https://doi.org/10.4271/831352

    Type of media :

    Conference paper

    Type of material :

    Print

    Language :

    English

    Keywords :

    Combustion and combustion processes , Ethanol , Alternative fuels

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