Sökning: "spark ignited engines"

Visar resultat 1 - 5 av 32 avhandlingar innehållade orden spark ignited engines.

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

   Författare :Christel Elmqvist-Möller; Hans-Erik Ångström; Daniel Håkansson; KTH; []
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER

3. 2. Theoretical and Experimental Studies of the Formation of Ionized Gases in Spark Ignition Engines

   Författare :Raymond Reinmann; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Thermal Ionization; Calorimetry; Interferometry; Spark Ignition Engine; Current and Voltage Measurements; Engine Control.; fluid dynamics; Gases; plasmas; Gaser; plasma; fluiddynamik; Breakdown; Arc; Glow; Flame Ionization; Chemi-Ionization; Spark; Townsend; Fysicumarkivet A:1998:Reinmann;

   Sammanfattning : The processes that govern the formation, existence and consumption of ions in gases have been studied both experimentally and theoretically. The aim of the work is targeted at increasing the understanding of these phenomena in the working gases inside an engine. LÄS MER

4. 3. Homogeneous Lean Combustion in Downsized Spark-Ignited Engines

   Författare :Kristoffer Clasén; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy efficiency; lean combustion; emissons; transportation;

   Sammanfattning : Emissions of greenhouse-gasses and noxious compounds from internal combustion engines propelling personal transportation vehicles is an imminent issue in the society. Therefore, it is vital to find means of reducing these emissions to decrease the impacts of transportation. LÄS MER

5. 4. Homogeneous Lean Combustion in Downsized Spark-Ignited Engines

   Författare :Kristoffer Clasén; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy efficiency; transportation;

   Sammanfattning : .... LÄS MER

7. 5. Empirical combustion modeling in SI engines

   Författare :Fredrik Lindström; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spark ignited engines; combustion modeling; knock; 1D simulation; Wiebe; divided exhaust period; Engineering mechanics; Teknisk mekanik;

   Sammanfattning : This licentiate thesis concerns the modeling of spark ignition engine combustion for use in one dimensional simulation tools. Modeling of knock is of particular interest when modeling turbocharged engines since knock usually limits the possible engine output at high load. LÄS MER