Sökning: "operating cycle"
Visar resultat 6 - 10 av 169 avhandlingar innehållade orden operating cycle.
6. On Numerical Descriptions of Road Transport Missions
Sammanfattning : This thesis addresses some issues of current interest in energy consumption prediction through simulation. First, we review the situation for rating, regulation and legislation of CO$_2$-emissions for cars and heavy vehicles. LÄS MER
7. Performance Measures of Road Infrastructure - A Life Cycle Thinking Approach
Sammanfattning : Roads have been an important asset of human society and the approach we adopt towards planning, designing, constructing, operating, and maintaining of the road infrastructure has significant consequences in the long-term for not only the humans, but all species on planet Earth. Hence, the lifecycle performance of the road infrastructure that sustain our socioeconomic development with a low environmental impact, while fulfilling their technical and functional requirements is of critical importance and needs to be improved. LÄS MER
8. Design and Optimization of In-Cycle Closed-Loop Combustion Control with Multiple Injections
Sammanfattning : With the increasing demand of transportation, biofuels play a fundamental role in the transition to sustainable powertrains. For the increased uncertainty of biofuel combustion properties, advanced combustion control systems have the potential to operate the engine with high flexibility while maintaining a high efficiency and robustness. LÄS MER
9. Double Compression-Expansion Engine Concepts : Experimental and simulation study of a split-cycle concept for improved brake efficiency
Sammanfattning : The four-stroke engine was invented by Nikolaus Otto during the second half of the 19th century. Although a lot of technological improvements have been made over the years, the operating principle with four-strokes remains the same. The need and desire of engines with even higher fuel-efficiency is a motivation to study alternative engine concepts. LÄS MER
10. State-of-Health Estimation of Li-ion Batteries: Cycle Life Test Methods
Sammanfattning : Despite a rapid development, cost, performance and durability of the energy storage system are still a hindrance for a wide commercialisation of heavy-duty hybrid electric vehicles (HEV). The purpose of the work presented in this thesis is to investigate how different load cycle properties affect the cycle life and ageing processes of Li-ion cells developed for use in HEVs. LÄS MER