Search for dissertations about: "reducing emission"

Showing result 11 - 15 of 150 swedish dissertations containing the words reducing emission.

  1. 11. Computation of EMC Properties of Slots and Printed Circuit Boards

    Author : Jan Carlsson; Chalmers University of Technology; []
    Keywords : corrugations; crosstalk; FDTD; spectral domain; EFIE; chokes; Finite Difference Method; printed circuit board; transmission line network; EMC analysis; PCB; transmission line theory; radiated emission; Method of moments; MM; MoM; electric field integral equation; soft and hard surfaces; slot; radiated susceptibility;

    Abstract : This thesis deals with the numerical solution of electromagnetic compatibility (EMC) problems for electronic systems, such as radiated emission, susceptibility and crosstalk on printed circuit boards and transmission through slots. The analysis of printed circuit boards is done by using an electric field integral equation (EFIE) expressed in the frequency domain, which is solved by using the method of moments. READ MORE

  2. 12. Control Structures for Low-Emission Combustion in Multi-Cylinder Engines

    Author : Maria Henningsson; Institutionen för reglerteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LQG control; fumigation; mid-ranging control; HCCI engine; engine control;

    Abstract : Traditionally, heavy-duty diesel engines have high efficiencies but also high emissions of NOx and soot particles. New engine concepts show the potential to retain diesel-like efficiencies while reducing emissions by forming a completely or partially homogeneous mixture of fuel and air prior to ignition through compression. READ MORE

  3. 13. Ultra-High Pressure Spray for Gasoline Direct Injection Engines

    Author : Akichika Yamaguchi; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; particulate emission.; gasoline direct injection engine; gasoline spray; high pressure spray; GDI;

    Abstract : There is an increasingly urgent need for vehicle manufacturers to reduce emissions from passenger vehicles to protect the environment and comply with increasingly stringent emissions standards such as Euro 6d, which came into force in January 2021, and Euro 7, which will probably come into force around 2025. Current emissions standards limit passenger vehicles' particulate number emissions to at most 6*10^{11} [#/km], making it necessary to find ways of reducing the engine-out particulate emissions of gasoline direct injection engines to meet this requirement. READ MORE

  4. 14. Particulate Emissions Associated with Diesel Engine Oil Consumption

    Author : Petter Tornehed; Ulf Olofsson; Gordon E. Andrews; KTH; []
    Keywords : Lubrication oil; Particulate emission; Particulate matter PM ; Oil consumption; Diesel engine; Mechanical engineering; Maskinteknik;

    Abstract : Particulate emissions from diesel engines have been a key issue for diesel engine developers in recent decades. Their work has succeeded in reducing the exhaust particles from the combustion of fuel, which has led to increasing interest in the contribution of particulates from lubrication oil. READ MORE

  5. 15. A systematic approach for major renovation of residential buildings

    Author : Linn Liu; Bahram Moshfegh; Patrik Rohdin; Jan Akander; Mari-Louise Persson; Linköpings universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; energy efficiency; renovation; residential buildings; listed buildings; simulation; optimization; LCC; categorization; energy efficiency measure package; indoor environment; energy targets; CO2 emission; primary energy use; energieffektivisering; renovering; bostäder; historiska byggnader; simulering; optimering; LCC; kategorisering; energieffektiviseringsåtgärdspaket; inomhusmiljö; energimål; CO2-utsläpp; primärenergianvändning;

    Abstract : In Sweden, buildings are responsible for about 40 % of total energy use and about 10 % of total CO2 emissions Today more than 60 % of existing Swedish residential buildings are over 40 years old and are in need of major renovation. In addition, 15 % of all multi-family buildings and 27 % of all single-family houses were built before 1945. READ MORE