Prediction of specific fuel consumption in turbocharged diesel engines under partial load performance

Abstract

It is known that the performance of Diesel engine at partial load is different from the performance at full load, but engines manufacturers usually provide only the operation characteristics in the highest efficiency condition. In order to determine the Diesel engine performance at all operation condition an investigation has been conducted. The purpose is to develop a theoretical model based on the iso-consumption curve of the IVECO 8360.46.417 Diesel engine that allows predicting the refuse trucks engine consumption used in this work. With the curve and the information provided by the manufacturer the prediction of the specific consumption and performance of a refuse truck turbocharged engine fueled by Diesel was made using a two-variables regression with a third grade polynomial approximation. The result is a third grade polynomial that allows the specific consumption calculation depending on the torque and the engine speed.