Search for dissertations about: "gas engines"

Showing result 1 - 5 of 269 swedish dissertations containing the words gas engines.

  2. 1. 1-D simulation of turbocharged SI engines : focusing on a new gas exchange system and knock prediction

    Author : Christel Elmqvist-Möller; Hans-Erik Ångström; Daniel Håkansson; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spark ignited engines; 1-D flow simulation; knock; Divided Exhaust Period; turbocharged engines; Other engineering mechanics; Övrig teknisk mekanik;

    Abstract : This licentiate thesis concerns one dimensional flow simulation of turbocharged spark ignited engines. The objective has been to contribute to the improvement of turbocharged SI engines’ performance as well as 1 D simulation capabilities. Turbocharged engines suffer from poor gas exchange due to the high exhaust pressure created by the turbine. READ MORE

  4. 2. Analysis of bottoming cycles with ammonia-water mixtures as working fluid : applications with gas engines and gas diesel engine

    Author : Maria Jonsson; KTH; []
    Keywords : ;

    Abstract : .... READ MORE

  5. 3. Improving the Efficiency of Gas Engines using Pre-chamber Ignition

    Author : Ashish Shah; Förbränningsmotorer; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ignition system; high efficiency; pre-chamber ignition; natural gas; Internal combusiton engines;

    Abstract : The aim of this project is to explore and understand the combustion phenomenon in engines operating on gaseous fuels, and develop technologies as an alternative to the present diesel engine technologies for heavy duty applications; which are facing severe challenges like stringent emissions norms, high technology costs and unsustainable fuel supply. The studies presented in this thesis focus on the application of pre-chamber ignition system in heavy duty natural gas engines, as a means to improve fuel efficiency and reduce NOx emissions. READ MORE

  6. 4. Late Cycle Soot Oxidation in Diesel Engines

    Author : Yann Gallo; Förbränningsmotorer; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Soot oxidation; Laser extinction; Optical diagnostics; Diesel engines; Gas sampling; Particulate matter;

    Abstract : Diesel engines are the most common engine technology used in transportation. Its widespread use comes from its inherent high efficiency and its relative low cost. It suffers from pollutant emission issues, however, that need detailed understanding of their origins to meet the strictest current and upcoming emission standards. READ MORE

  7. 5. Indirect gasification production of biomethane for use in heavy-duty state-of-the-art gas engines

    Author : Alberto Alamia; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; well-to-wheel; biomethane; gas engines; SNG; DFB gasifier; process simulation; dual fuel; Biomass gasification;

    Abstract : The climate targets set for the European transport sector have stimulated intensiveresearch by groups in academia, the energy industry, and vehicle manufacturing in theGothenburg region into biomethane production via indirect gasification of lignocellulosebiomass and the development of advanced gas engine technologies.This work presents the results of a comprehensive study of biomethane production andutilization in heavy duty engines. READ MORE