Sökning: "charge pumping"

Visar resultat 6 - 10 av 28 avhandlingar innehållade orden charge pumping.

  1. 6. Gasoline Engine HCCI Combustion - Extending the high load limit

    Författare :Daniel Dahl; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NVO; stratified charge; gasoline engine; high load; knock.; HCCI; stoichiometric; CAI; ringing; SCCI;

    Sammanfattning : There is an increasing global focus on reducing emissions of greenhouse gases.For the automotive industry this means reducing CO2 emissions of the vehiclesmanufactured, which is synonymous with reducing their fuel consumption oradapting them for using renewable fuels. LÄS MER

  3. 7. Scattering approach to time-dependent charge and energy transport in mesoscopic conductors

    Författare :Francesca Battista; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:2013:Battista;

    Sammanfattning : This thesis aims to contribute to the field of time controlled charge and energy transport in mesoscopic systems. In Chapter 1, Chapter 2 and Chapter 3 a short review of the scattering matrix theory is presented, including both charge and energy transport, useful to understand the mathematical landscape used in Papers I, II, III and IV. LÄS MER

  4. 8. Charge Breeding and Production of Multiply Charged Ions in EBIS and ECRIS

    Författare :Fredrik Wenander; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The REXEBIS is an Electron Beam Ion Source (EBIS) developed for charge breeding of the exotic and sometimes short-lived isotopes that are produced at ISOLDE for the REX-ISOLDE post accelerator. Bunches of singly charged radioactive ions are injected into the EBIS and charge bred to a charge-to-mass ratio of approximately ¼, and thereafter extracted and injected into a short 3-stage LINAC for acceleration to a few MeV/u. LÄS MER

  5. 9. Alternative Combustion Strategies for Gasoline Engines

    Författare :Daniel Dahl; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; engines; SI; SGDI; CAI; HCCI; Otto; lean burn; gasoline; combustion; fuel consumption;

    Sammanfattning : Due to increasingly strict legislative demands and customer concerns regarding CO2emissions, there is a need to develop and implement new combustion strategies forgasoline (Otto) engines. In attempts to meet this need, most attention is focusing onthe low load/speed range where the classic spark ignition strategy (SI) has poorefficiency, mainly due to the throttling of the intake air causing pumping losses. LÄS MER

  7. 10. Electromechanical Interactions in Shuttle Systems and Carbon Nanotube Relays

    Författare :Tomas Nord; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coulomb blockade; carbon nanotubes; memory device; nanorelay; single electron tunneling; van der Waals forces; NEMS; shuttle transport; mesoscopic; nanoelectromechanical systems;

    Sammanfattning : In this thesis we theoretically investigate two kinds of nanoscale systems where there is a strong electromechanical coupling, i.e. an intricate relation between the Coulomb forces that can appear in these systems and the displacements of parts of the systems that they cause. LÄS MER