Abstract
The next generation of car diesel engines, with modular functions around a downsizing platform has to achieve a significant lower level of the tradeoff between pollutant emissions and specific fuel consumption as indicator of CO2 emission. An adequate shaping of the process stages are obtainable by the combined utilization of 1D- and 3D-Codes for the simulation of fresh charge flow and distribution, injection rate and spray characteristics, as well as of the internal mixture formation and combustion. The permanent comparison with experimental results allows the calibration of the complex 1D/3D model with sufficient accuracy. The main parameters of the present analysis are: geometry of the scavenging ducts, charging air pressure, form of the piston bowl, injector type, injection rate modulation, spray characteristics.
The paper presents as examples of results the time- and space-related spray development, the heat release and the NOX and soot emission at part and full load for different speed values.