Search Results

The environment load by traffic has reached limits of reasonableness in many places and metropoles. High mobility and environmental protection however can be equally fulfilled by consistently using latest automobile and engine technology. Nowadays the mean fuel consumption of new passenger cars equipped with gasoline engines is below 8 L/100 km and with diesel engines below 6 L/100 km. A 30 - 50 % reduction of fuel consumption within the next 10 years is expected with similar progress for commercial vehicle. This reduction of fuel consumption is not only important for saving resources, but also for protecting our global climate. The utmost target for engine development is to minimize both consumption and pollutant emissions. Effective reduction in classical pollutants for gasoline engines and new technologies such as oxydation Catalyst, De-NOx etc., for diesel engines have placed both power plants promising for passanger car market.

A number of commercially available and viable diesel fuels of different specifications was tested in two passenger cars powered by advanced prototype IDI and DI diesel engines, respectively, along the FTP 75, FTP 72 hot, the new European driving cycle [ECE 15 (urban) + EUDC (extra urban driving cycle)] cold and hot, and the Japan 10.15 driving cycle (hot start test). Both engines have been developed for emission levels currently required in Europe for diesel powered passenger cars. The results of this study demonstrate that fuel quality does have a significant impact on exhaust emissions of advanced diesel engines of both, DI and IDI combustion technology. The observed differences in emissions could be correlated with cetane number, density or aromatics content of the fuels tested whereas correlations with the distillation range (90% boiling point) was rather poor.