Effect Analysis on the Performance Enhancement and Emission Reduction of Diesel Engine Fueled with Biodiesel Fuel Based on an Improved Model

Abstract EN

To increase the efficiency and accuracy of computing, an improved combined weight coefficient is used to develop an improved heat transfer model in AVL-BOOST environment.

Similarly, a five-component biodiesel skeletal mechanism is employed to investigate the combustion process of biodiesel fuel.

Then, the AVL-BOOST model is validated by the experimental results under different conditions.

Finally, the improved heat transfer model is employed to investigate the propulsion and load characteristics of diesel engine fueled with biodiesel fuel in terms of power, BSFC, soot, and NOx emission.

The result shows that the errors between experiment and simulation are less than 2% and the simulation model can predict the propulsion and load characteristics of the diesel engine.

In addition, the comprehensive characteristic of case 5 is the best.

Moreover, the big inject orifice is not beneficial to the fuel atomization and more soot is produced.

Thus, it is very important to choose the appropriate injection rate reasonably.