Sökning: "light valve"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden light valve.

  1. 1. Electronic addressing of ferroelectric liquid crystals

    Författare :Tomasz Matuszczyk; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multiplexing; smectic; displays; ferroelectricity; black mask; polarization; mesophases; light modulators; surface-stabilized structure; light valve; dielectric anisotropy; polarized light; liquid crystals; chirality; ferroelectric liquid crystals; dither;

    Sammanfattning : .... LÄS MER

  3. 2. The Low Load Limit of Gasoline Partially Premixed Combustion (PPC) - Experiments in a Light Duty Diesel Engine

    Författare :Patrick Borgqvist; Förbränningsmotorer; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The decreasing oil supply, more stringent pollutant legislations and strong focus on decreasing carbon dioxide emissions drives the research of more efficient and clean combustion engines. One such combustion engine concept is Homogeneous Charge Compression Ignition (HCCI) which potentially achieves high efficiency and low NOx and soot emissions. LÄS MER

  4. 3. Turbocharged HCCI Engine, Improving Efficiency and Operating Range

    Författare :Thomas Johansson; Förbränningsmotorer; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HCCI; NVO; turbo; direct injection; combustion; CAI; low temperature; simulation; engine;

    Sammanfattning : Increasing fuel prices and environmental concern drives the research and development for the internal combustion engine. Homogeneous Charge Compression Ignition (HCCI) is a promising combustion concept with high fuel efficiency and low emissions. LÄS MER

  5. 4. Transient Air to Fuel Ratio Response in a Fuel Injected S.I Engine

    Författare :Göran Almkvist; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; dynamic; A F; model; transient; air to fuel; response; time constant; film; behavior; lambda; time-delay; fuel; mass; deposit factor;

    Sammanfattning : Future emission standards make it necessary to focus on the conditions under which engine emissions are produced, especially before the catalyst light off. During practical driving conditions, such as those represented by the FTP 75 test cycle, the engine is operated very much under transient conditions regarding load and speed. LÄS MER

  7. 5. Flow measurements using combustion image velocimetry in diesel engines

    Författare :Henrik Dembinski; Hans-Erik Ångström; Paul Miles; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This work shows the in-cylinder airflow, and its effects on combustion and emissions, in a modern, heavy-duty diesel engine. The in-cylinder airflow is examined experimentally in an optical engine and the flow field inside the cylinder is quantified and shown during combustion, crank angle resolved. LÄS MER