Sökning: "Lars Nielsen"
Visar resultat 1 - 5 av 32 avhandlingar innehållade orden Lars Nielsen.
1. Single-Zone Cylinder Pressure Modeling and Estimation for Heat Release Analysis of SI Engines
Sammanfattning : Cylinder pressure modeling and heat release analysis are today important and standard tools for engineers and researchers, when developing and tuning new engines. Being able to accurately model and extract information from the cylinder pressure is important for the interpretation and validity of the result. LÄS MER
2. Modeling for control of centrifugal compressors
Sammanfattning : Downsizing and turbocharging of engines provide a way to meet increasing demands for efficiency and performance in the automotive industry. An engine design is a result of compromises, e.g. the selection of charging system, and the trend is to reduce these compromises by increasing system complexity. LÄS MER
3. Optimal Engine Operation in a Multi-Mode CVT Wheel Loader
Sammanfattning : Throughout the vehicular industry there is a drive for increased fuel efficiency. This is the case also for heavy equipment like wheel loaders. The operation of such machines is characterized by its highly transient nature, the episodes of high tractive effort at low speed and that power is used by both the transmission and the working hydraulics. LÄS MER
4. Modelling for Fuel Optimal Control of a Variable Compression Engine
Sammanfattning : Variable compression engines are a mean to meet the demand on lower fuel consumption. A high compression ratio results in high engine efficiency, but also increases the knock tendency. On conventional engines with fixed compression ratio, knock is avoided by retarding the ignition angle. LÄS MER
5. Control of EGR and VGT for Emission Control and Pumping Work Minimization in Diesel Engines
Sammanfattning : Legislators steadily increase the demands on lowered emissions from heavy duty vehicles. To meet these demands it is necessary to integrate technologies like Exhaust Gas Recirculation (EGR) and Variable Geometry Turbochargers (VGT) together with advanced control systems. LÄS MER