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Visar resultat 16 - 20 av 42 avhandlingar som matchar ovanstående sökkriterier.

1. 16. Simulation Studies of Impact of Heavy-Duty Vehicle Platoons on Road Traffic and Fuel Consumption

   Författare :Ingrid Johansson; Xiaoliang Ma; Wilco Burghout; Henrik Pettersson; Xiaobo Qu; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; heavy-duty vehicle platooning; microscopic traffic simulation; intelligent transport systems; optimal control; longitudinal cruise control; fuel economy; Transportvetenskap; Transport Science;

   Sammanfattning : The demand for road freight transport continues to grow with the growing economy, resulting in increased fossil fuel consumption and emissions. At the same time, the fossil fuel use needs to decrease substantially to counteract the ongoing global warming. LÄS MER

3. 17. Ghosts of the Past or Facilitators of the Future? : Firm-System Interactions in the Transition to Electrified Goods Transportation

   Författare :Viktor Werner; Thomas Magnusson; Ksenia Onufrey; Solmaz Filiz Karabag; Peter Wells; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

   Sammanfattning : If you visit Linköping, you have good chances to see electrified cars, or you may even take a ride on an electric city bus. However, you will have some difficulty spotting one of the very few electric trucks operating in the city. LÄS MER

4. 18. The relationship between rolling resistance and tyre operating conditions, with a focus on tyre temperature

   Författare :Lisa Ydrefors; Annika Stensson Trigell; Jenny Jerrelind; Jurek Ejsmon; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rolling resistance; tyre temperature; brush model; parametrisation; rolling resistance measurement; drum measurements; operating conditions; tyre; flat track measurements; Rullmotstånd; rullmotståndsmätning; däcktemperatur; driftsförhållanden; trummätning; borstmodellen; parametrisering; däck; Vehicle and Maritime Engineering; Farkostteknik;

   Sammanfattning : Efforts to reduce greenhouse gas emissions from today’s increasing number of cars and trucks, are crucial in counteracting global warming. These efforts include the intent to reduce the effects of the resistive forces acting on the vehicle. Rolling resistance is one of these forces. LÄS MER

5. 19. Towards a sustainable automotive industry : experiences from the development of emission control systems

   Författare :David Bauner; Staffan Laestadius; Lee Schipper; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; evolutionary economics; environmental innovation; trajectories; co-evolution; Industrial engineering and economy; Industriell teknik och ekonomi;

   Sammanfattning : From the mid-1970s and on, the contribution to air pollution of carbon monoxide, hydrocarbons and nitrogen oxides from gasoline passenger cars in the developed world has been reduced through co-evolution of regulation and commercial introduction of catalytic emission control technology, now part of hundreds of millions of cars, trucks and buses worldwide. This dissertation is a disaggregated study of the global introduction of catalytic emission control technology as a measure to reduce local air pollution. LÄS MER

7. 20. Methods for Testing and Analyzing Lithium-Ion Battery Cells intended for Heavy-Duty Hybrid Electric Vehicles

   Författare :Pontus Svens; Göran Lindbergh; Mårten Behm; Søren Juhl Andreasen; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Li-ion; battery; hybrid electric vehicle; Chemical Engineering; Kemiteknik;

   Sammanfattning : Lithium-ion batteries designed for use in heavy-duty hybrid vehicles are continuously improved in terms of performance and longevity, but they still have limitations that need to be considered when developing new hybrid vehicles.               The aim of this thesis has been to study and evaluate potential test and analysis methods suitable for being used in the design process when maximizing lifetime and utilization of batteries in heavy-duty hybrid vehicles. LÄS MER