AM-00-56 EVALUATION OF FUTURE DIESEL ENGINE TECHNOLOGIES

Description:

In view of future US-EPA exhaust emission standards this paper is an attempt to assess technology packages for Heavy Duty Diesel engines and their diesel fuel sulphur requirements with regard to their impact on exhaust emissions reduction, fuel economy and cost effectiveness. More specifically, engine as well as aftertreatment technology options are reviewed for their potential to reduce emissions. Aftertreatment systems addressed are diesel oxidation catalysts [DOC], particulate traps/filters, Selective Catalytic Reduction [SCR] with injection of urea/water solution, NOx adsorbers, all in conjunction with fuel quality, particularly regarding the effect and requirement of fuel sulphur content. Future US-EPA emission standards for HD diesel engines for 2002/2004 and particularly for 2007 are taken into account. At first, future EPA on-highway exhaust emission standards are reviewed, and features of the new test procedures, along which future engines will have to be certified, are high-lighted. After a general review of aftertreatment options, only those are taken into account which are seen as the most promising ones to be applied for future HD Diesel Engines. These technology options are assessed with regard to their impact on fuel sulphur requirement, fuel consumption, incremental cost/end-user price increase, maintenance and today’s development status.