Abstract
The proposed new European emission standards (EURO VI) to be in force by 2013/2014 are considered very severe, having a NO_x-standard of 0.4 g/kWh in the European Transient Cycle (ETC) together with a low particulate limit of 0.01 g/kWh. Above limits require significant in-cylinder reductions of pollutants as well as exhaust gas aftertreatment for both, nitrogen oxides and particulates. Furthermore, due to the much discussed climate change, the emissions of greenhouse gases (GHG) are to be reduced. For EURO VI, the first step will be to reduce engine-out emissions by means of advanced combustion process development using improved fuel injection equipment, supercharging, exhaust gas recirculation, flexible engine systems, extended engine control and by the mechanical development. Then it would appear that exhaust gas aftertreatment systems are needed. Since approximately 30 % of the fuel input is lost in the exhaust gas, an exhaust gas energy recuperation might be a step forward to reduce fuel consumption and GHG-emissions. In a second part an overview of the EU R&D-project GREEN will be given. In this project, European HD engine manufacturers join forces with suppliers, academia and leading engineering institutes. The common goal is to promote future advanced engine technologies to achieve lower emissions, lower fuel consumption and improved sustainability for future fuels. The main objective of GREEN is to perform research, which will lead to innovative sub-systems for heavy duty engines. The project puts emphasis on diesel engines for trucks and rail applications and on natural gas engines for city transport applications.
