In this study engine calculations were compared to experimental results and showed very good agreement for pressure, ignition delay and fuel consumption. They found that for 44% loads, SFC, PM and NOx emissions decreased, while for 86% loads only NOx emission decreased. They concluded that, advancing the injection timing provides significant decrease in sfc, PM and NOx for 44% loads, and large decrease in PM and NOx but with a small increase in fuel consumption for 86% loads [8].