CO{sub}2 Reduction Potential of an Advanced Diesel Combustion ingine in an Advanced Passenger Car Powertrain

摘要

Future emission legislation will require simultaneous reduction of toxic exhaust emissions and fuel consumption. Based on in-depth analysis of various CO{sub}2 - reduction technologies, downsizing of diesel drive trains proves to be most effective to meet future legislative limits. Another key technology is an advanced power net for electrical assisted cruising. However, both measures will require new drive train concepts. Shifted engine operation to higher loads improves efficiency but is more critical to NO{sub}x and particulate trade-offs due lower air excess ration and hence deteriorated EGR conditions. To satisfy customer dri-veability demands advanced charging technologies and electrical motor assistance shall be utilised. Hence, it was the main objective of the investigations discussed in this paper to identify powertrain concepts, which can meet these partly conflicting boundary conditions - and still being as cost effective and technically suitable for real mass production.