REDUCTION OF EXHAUST EMISSIONS BY OVERALL ASSESSMENT OF DIESEL ENGINE AND ACTIVE EXHAUST AFTERTREATMENT SYSTEMS

An exhaust aftertreatment system will be required to close the gap between the emissions of today's engines and the future emission limits proposed by the EU. Two strategies have been identified: reduction of nitrogen oxide (NOx) emissions by modifying the combustion process and using exhaust gas recirculation (EGR) or the reduction of unburned components of the exhaust gas by optimization of the combustion process combined with higher NOx emissions and using a DeNOx aftertreatment system. A selective catalytic reduction (SCR) system is the preferred DeNOx technology for heavy trucks to meet Euro 5 emission limits. The principles of the SCR technology and the development of the SINOx system are outlined. Developments aimed at fully integrating the exhaust aftertreatment system with the vehicle concept are discussed. The logistics and infrastructure associated with the use of a water-based urea solution are considered. For the covering abstract see ITRD E120563.