The potential of downsizing diesel engines considering performance and emissions challenges

摘要

The steadily increased specific power and torque output leads to improved driving performance of Diesel powered vehicles. In the context of the CO{sub}2 discussion, the downsized displacement is an option, which needs to be considered for future applications. In this paper, the different aspects of a downsizing concept will be discussed. Based on gas-exchange calculations with respect to compatibility to the targeted full load performance of 80 kW/1, a 2-stage boosting concept was chosen and the EGR-path and the combustion system were enhanced to meet this significant challenge. Finally the potential of the downsizing concept during the NEDC is assessed.