Exhaust-Emission Optimization of DI-Diesel Passenger Car Engine with High-Pressure Fuel Injection and EGR 931035
This paper deals with a passenger-car direct-injection-diesel-engine with electronically controlled unit-injector. It is being investigated how far emissions and fuel-consumption can be influenced by exhaust-gas-recirculation (EGR) and pilot-injection especially when they are in combination with each other.
The results reveal that the NOx-emission can be decreased much more by EGR than by pilot-injection. The lowest NOx-emissions however can only be reached by combination of EGR and pilot injection.. In the investigated area of the engine map a decrease in soot-emission can be obtained with rising EGR-rates by pilot-injection. On the other hand pilot-injection results in an increase of soot emission at high EGR-rates at the engine operating point N=2000 rpm, bmep=2 bar.
Pilot-injection in combination with EGR effects no deterioration of fuel-consumption and HC-emission.
Citation: Mikulic, L., Kühn, M., Schommers, J., and Willig, E., "Exhaust-Emission Optimization of DI-Diesel Passenger Car Engine with High-Pressure Fuel Injection and EGR," SAE Technical Paper 931035, 1993, https://doi.org/10.4271/931035. Download Citation
Leopold Mikulic, Michael Kühn, Joachim Schommers, Egbert Willig
International Congress & Exposition
SAE 1993 Transactions: Journal of Passenger Cars-V102-6