Diesel Exhaust Emissions Prediction Under Transient Operating Conditions

A non-linear transient engine cycle simulation software has been integrated to a versatile quasi two-dimensional multi-zone combustion-emissions model in order to predict exhaust emissions under transient operating conditions. The basic engine and exhaust emissions models are outlined with special reference to the requirements of engine transient operation. The predictive capability of the simulation is demonstrated through comparison of measured and predicted performance and emissions for several engine transients.