Multidimensional Modeling of Direct Injection Diesel Engine with Split Multiple Stage Fuel Injections

摘要

In the present study, an attempt has been made to predict the influence of split multiple stage fuel injection on a DI diesel engine performance and emission characteristics. The predictions have been made for both conventional continuous fuel injection as well as split multiple stage fuel injection. The analysis mainly emphasize on the prediction of SFC and NO_x levels in a diesel engine for the above mentioned two fuel injection modes. These computational predictions can enhance the knowledge of the flow and combustion characteristics, which is of vital importance for the design and development of a high performance DI diesel engine. The aforementioned simulation work has been performed using a CFD code. It has been found that the split multiple stage fuel injection exhibits strong effects on combustion characteristics and provides controlled pressure and temperature inside the combustion chamber. It has also been seen that split multiple stage fuel injection significantly reduces the formation of NO_x compared to that of the continuous fuel injection.