Diesel Combustion Prediction in Transient Operation Using a New Cycle-simulation (Fifth Report)

- Highly Robust Prediction of Combustion Characteristics Over All Operating Points for Virtual Engine Calibration -

Abstract

In order to predict for more real-world engine operating conditions such as ARTEMIS driving Cycle, a new spray model has been implemented in the 0D-cycle simulation to account for the spray-to-spray interaction in swirl direction, which interferes in air-entrainment into the sprays. Furthermore, NOx reduction models have been newly introduced in addition to the standard Zeldovich mechanism to account for NOx reduction process, which plays significant roles in richer and higher temperature conditions. Those new models remarkably improve the predictability of combustion characteristics all over operation points, and ‘virtual engine calibration′ becomes more realistic with the simulation proposed in this study.