Browsing by Author "Trnka, Miroslav"

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    Adaptation of Small Spark Ignition Engine to Alcohol Fuels
    (Technická Univerzita v Liberci, 2014-01-01) Pechout, Martin; Trnka, Miroslav; Novotný, Martin; Vojtíšek, Michal
    Most of the effort to decrease dependency on fossil fuels is taking place in vehicular applications. There are relatively few studies aimed to investigate possibilities and results of usage of alternative, mainly alcohol-based, fuels in small engines used for propulsion of small garden machinery. The aim of this paper is to investigate the effects of alcohol fuels, n-buthanol and E85, on the operation of small spark ignition engine without any modification and with simple carburetor modification. The test results of an unmodified engine show a remarkable mixture enleanment with increasing alcohol share accompanied by decrease in maximum torque, limitation of stable engine regimes, increased nitrogen oxides production and lowered production of carbon monoxide and hydrocarbons. Simple carburetor modification suppressed all the above mentioned negative impacts and thus allowed combustion of selected alcohol fuels.
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    Malý spalovací motor na alkoholová paliva
    (Technická Univerzita v Liberci, 2012-01-01) Trnka, Miroslav; Vojtíšek, Michal
    The thesis deals with general area of using alcohol fuels in combustion engines. The aim of the thesis is theoretical and experimental investigation of possibilities of small combustion engines operating with butanol and blends of butanol and gasoline of various concentrations. Further it describes startability of engine at low temperatures and examines the compatibility of alcohol fuels and materials used in the engine.
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    Malý spalovací motor na alkoholová paliva
    (2012-01-01) Trnka, Miroslav