Sökning: "piston geometry"

Visar resultat 1 - 5 av 27 avhandlingar innehållade orden piston geometry.

  1. 1. Experimental Investigations of Combustion Chamber Heat Transfer in a Light-Duty Diesel Engine

    Författare :Jessica Dahlström; Förbränningsmotorer; []
    Nyckelord :internal combustion engines; heat transfer; diesel engine; Diesel combustion; combustion chamber geometry; piston geometry; spray parameters;

    Sammanfattning : This work concerned experimental studies of heat transfer in a light-duty diesel engine. Combustion is affected by several parameters, such as pressure, engine speed, mass of injected fuel and in-cylinder gas flow. These parameters are in turn affected by the combustion chamber geometry and fuel spray characteristics. LÄS MER

  3. 2. Numerical Studies of Methanol PPC Engines and Diesel Sprays

    Författare :Mateusz Pucilowski; Strömningsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Methanol; Partially Premixed Combustion PPC ; spray-wall interaction; piston geometry; multiple injections; ICE; ignition front; diffusion flame; combustion mode; RANS; LES; PPC; Diesel spray;

    Sammanfattning : The global environment suffers from utilizing fossil fuels to powering internal combustion engines (ICE), due to the massive amounts of released CO2. Besides the global impact, the local environments experience high concentrations of harmful pollutants such as NOx, CO, soot and particulate matter (PM). LÄS MER

  4. 3. Stratification and Combustion in the Transition from HCCI to PPC

    Författare :Changle Li; Förbränningsmotorer; []
    Nyckelord :HCCI; PPC; CI; stratification; combustion; intake temperature; fuel properties; piston geometry; spray target; energy balance; efficiency;

    Sammanfattning : .... LÄS MER

  5. 4. Suction dynamics of axial piston pumps

    Författare :Pär-Erik Wiklund; KTH; []
    Nyckelord :;

    Sammanfattning : Computational fluid dynamics (CFD), extensive experimentalstudies and a one-dimensional model based on two pressurereduction coefficients are used in this thesis to analyse thesuction dynamics of an bent axis axial piston pump. Specialattention is given to cavitation since a great deal of problemsare related to this very important phenomenon. LÄS MER

  7. 5. Waste Heat Recovery from Combustion Engines based on the Rankine Cycle

    Författare :Gunnar Latz; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; waste heat recovery; Rankine cycle; piston expander;

    Sammanfattning : Most of the energy in the fuel burned in modern automotive internal combustion engines is lost as wasteheat without contributing to the vehicle’s propulsion. In principle some of this lost energy could becaptured and used to increase the vehicle’s fuel efficiency by fitting a waste heat recovery system to theengine. LÄS MER