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- W2185557793 abstract "This thesis work is the last part of the Master of Science education in mechanical engineering at KTH, Stockholm. The aim of this project was the development of a Multi-zone model for NOx formation in Diesel engines. Because of the stringent emission legislations, great effort is made to decrease the fuel consumption and the harmful emissions of internal combustion engines. Computer simulations play a decisive role in this context because they substitute the expensive and time-consuming laboratory tests. The model is based on a multi-zone approach and uses the wellknown Extended Zeldovich Mechanism which gives a relation to calculate the NO formation rate using the concentration of different gas species involved in the process. All the most important phenomena involved in the Diesel combustion have been modelled. A special attention is then paid to the equilibrium concentration calculation; this is a significant part of the model which strongly influences the following steps. A Simulink model has also been developed. This second version is based on the previous model and it is made especially to allow the connection with other external softwares, GT-power in this case. Simulink gives the possibility to create a model which, using look-up tables instead of iterative functions, can be faster and easier to handle if compared to the MATLAB code. The model has been validated with test sessions on a single cylinder engine based on a heavy duty SCANIA D12 6-cylinder Diesel engine. This work has finally given a model which seems accurate and precise enough to be used as a tool in the simulation of Diesel engine NOx emissions." @default.
- W2185557793 created "2016-06-24" @default.
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- W2185557793 date "2007-01-01" @default.
- W2185557793 modified "2023-09-26" @default.
- W2185557793 title "Development of a Multi-Zone Model for NOx Formation in Diesel Engines" @default.
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