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Visar resultat 1 - 5 av 112 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Processes in Optical Diesel Engines - Emissions Formation and Heat Release

    Författare :Ulf Aronsson; Förbränningsmotorer; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Diesel Engines; Optical Engines; Heat Release; Combustion; Emissions Formation; Mechanical Deformation;

    Sammanfattning : This project deals with questions related to generic diesel combustion research and optically accessible engines are used to study the combustion process. Images of the combustion are analyzed together with in-cylinder pressure and exhaust gas emission measurements. LÄS MER

  3. 2. Alkylate Petrol. Environmental Aspects of Volatile Hydrocarbon Emissions

    Författare :Ulf Östermark; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; hydrocarbons; small engines; alkylate; alkenes; ethene; benzene; 3-butadiene; two-stroke engines; reformulated petrol; reformulated gasoline; 1;

    Sammanfattning : All hydrocarbons emitted from production and use of petrol are hazardous to human health and the environment, but to a different extent for individual compounds. This thesis compares and characterizes C2-C8 hydrocarbons related to alkylate petrol and conventional petrol. LÄS MER

  4. 3. A Combustion Concept for Future Heavy-Duty Diesel Engines

    Författare :Tobias Husberg; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Diesel combustion; Common rail; Diesel engines; Multiple injections; Combustion concept; Heavy-duty;

    Sammanfattning : The Diesel engine has been intensively developed by manufacturers and researchers since 1892, when it was invented. However, the direction of its development has shifted in recent years.Environmental issues are becoming increasingly important in our society, prompting more efforts to be put into making the engines cleaner. LÄS MER

  5. 4. Small Orifices - Diesel Combustion and Spray Investigations

    Författare :Pär Bergstrand; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; multirow nozzles; small orifice diameter; diesel combustion; spray;

    Sammanfattning : Future demands on diesel engines, such as the need to meet stricter emission legislation, improve performance and lower fuel consumption, for lowering transportation cost and carbon dioxide emissions, forces the development of engines to take a major step in the near time. During the years of engine development, all components have been optimised in small steps at a time, but larger steps must now be taken to meet requirements of the future. LÄS MER

  7. 5. On the Computation of Turbulent Mixing Processes with Application to EGR in IC-engines

    Författare :Alexander Sakowitz; Laszlo Fuchs; Michel Cervantes; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Turbulent Mixing; Large Eddy Simulations; IC-engines; T-junction;

    Sammanfattning : This thesis deals with turbulent mixing processes occuring in internal combustion engines, when applying exhaust gas recirculation (EGR). EGR is a very efficient way to reduce emissions of nitrogen oxides (NOx) in internal combustion engines. LÄS MER