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Volume 46, Issue 1
  • ISSN: 0032-1400


New technologies, incorporating the platinum group metals, are available to meet the exhaust emission regulations for cars, light-duty and heavy-duty vehicles and motorcycles being adopted by the European Union for implementation during the new century. These technologies include low light-off catalysts, more thermally-durable catalysts, improved substrate technology, hydrocarbon adsorbers, electrically heated catalysts, DeNOx catalysts and adsorbers, selective catalytic reduction and diesel particulate filters. This large range of technologies will allow exhaust emissions from all engines, both on- and non-road, to be lowered to unprecedented levels. This paper examines the state of emission control technologies currently available for all types of engine.


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  1. Bertelsen B. I.1, Platinum Metals Rev., 2001, 45, (2), 50 [Google Scholar]
  2. 2‘A Review of the Auto-Oil II Programme’, COM(2000) 626, Commission of the European Communities, Brussels,
  3. 3Official Journal of the European Communities, L 350, Vol. 41, 28 Dec. 1998; Directive 98/69/EC
  4. 4European Directive 1999/96/EC, 13 Dec. 1999
  5. 5European Directive 97/68/EC, 16 Dec. 1997
  6. 6European Directive 2000/25/EC, 22 May 2000
  7. 7Commission proposal to amend European Directive 97/68/EC, COM(2000)840, Commission of the European Communities, Brussels, 18.12.2000
  8. 8European Directive 94/25/EC, in force 16 June 1998
  9. 9Official Journal of the European Communities, L 350, Vol. 41, 28 Dec. 1998; Directive 98/70/EC
  10. Horiuchi M., Makoto S., Saito K., and Ichihara S.10, , and , The effects of flow-through type oxidation catalysts on the particulate reduction of 1990s diesel engines’, SAE 900600 [Google Scholar]
  11. Voss K.11et al., ‘Zirconk-based ceramic, in-cylinder coatings and aftertreatment oxidation catalysts for reduction of emissions from heavy-duty diesel engines’, SAE 970469 [Google Scholar]
  12. Brisley R.J.12et al., The use of Palladium in advanced catalysts’, SAE 950259 [Google Scholar]
  13. Schmidt J.13et al,‘Utilization of advanced Pt/Rh TWC technologies for advanced gasoline applica-tions with different cold start strategies’, SAE 2001-01-0927 [Google Scholar]
  14. Cuif J.-P.14et al., ‘(Ce, Zr)O2 Solid solutions for three way catalysts’, SAE 970463 [Google Scholar]
  15. Gulati S. T.15, Thin wall ceramic catalyst supports’, SAE 1999-01-0269 [Google Scholar]
  16. Schmitt J.16et al., The impact of high Cell density ceramic substrates and washcoat properties on the catalytic activity of three way catalysts’, SAE 199901-0272 [Google Scholar]
  17. Kikuchi S.17et al., Technology for reducing exhaust gas emissions in zero emission level vehicles’, SAE 1999-01-0772 [Google Scholar]
  18. Gulati S. T.18, ‘Design considerations for advanced ceramic catalyst supports’, SAE 2000-01-0493 [Google Scholar]
  19. Nishizawa K.19et al., ‘New technologies targeting zero emissions for gasoline engines’, SAE 2000-01-0890 [Google Scholar]
  20. Brück R.20et al, The necessity of optimizing the interactions of advanced post-treatment components in order to obtain compliance with SULEV-legisk-tion’, SAE 1999-01-0770 [Google Scholar]
  21. Malls W., Brück R., and Holy G.21, and , ‘Zukünftige abgas-nachbehandlungstechnologien für Otto-Motoren; Die nächste generation niedrigstemissions-fahrzeuge’, AVL Congress, Graz, Austria, Sept. 1999 [Google Scholar]
  22. Noda N., Takahashi A., Shibagaki Y., and Mizuno H.22, , and , ‘In-line hydrocarbon adsorber for cold start emissions - Part ΙI’, SAE 980423 [Google Scholar]
  23. Hanel F. J., Otto E., Brück R., Nagel T., and Bergaul N.23, , , and , ‘Practical experience with the EHC system in the BMW ALPINA B12’, SAE 970263 [Google Scholar]
  24. Strehlau W., Leyrer J., Lox E. S., Kreuzer T., Hori M., and Hoffmann M.24, , , , and , ‘New developments in lean NOx catalysis for gasoline fuelled passenger cars in Europe’, SAE 962047 [Google Scholar]
  25. Brogan M. S., Brisley R. J., Walker A. P., Webster D. E., Boegner W., Fekete N. P., Kraemer M., Krutzsch B., and Voigtlaender D.25, , , , , , , and , ‘Evaluation of NOx storage catalysts as an effective system for NOx removal from the exhaust gas of lean burn gasoline engines’, SAE 952490 [Google Scholar]
  26. Göbel U., Kreuzer T., and Lox E. S.26, and , ‘Moderne NOx-adsorber-technologien, grundlagen, vorallsset-zungen, erfahrungen’, Proc. VDA-Conf., Frankfurt, 1999 [Google Scholar]
  27. Lüders H., Stommel P., and Geckler S.27, and , ‘Diesel exhaust treatment – New approaches to ultra low emission diesel vehicles’, SAE 1999-01-0108 [Google Scholar]
  28. Ruzicka N., and Liebscher T.28 and , ‘Possible aftertreat-ment concepts for passenger car diesel engines with sulphur-free fuel’, SAE 1999-01-1328 [Google Scholar]
  29. Fischer S., Hofmann L., and Mathes W.29, and , The development of the SINOx system for commercial vehicles for serial applications’, 20th Vienna Motor Symposium, 6-7 May, 1999, VDI Fortschritts-berichte Reihe 12, Nr. 376, 267282 [Google Scholar]
  30. Amon B., Fischer S., Hofmann L., and Zuerbig J.30, , and , The SINOx system for trucks to fulfil the future emission regulations’, CAPoC 5, Brussels, 12–14 April, 2000 [Google Scholar]
  31. 31Siemens AG and TÜV automotive, ‘Investigation on long-term stability of diesel DeNOx catalyst exhaust gas aftertreatment systems on 3 MAN and 10 DaimlerChrysler trucks – results of the 2nd Bavarian Road Test’, Final Report [Google Scholar]
  32. Fritz N., Mathes W., Zürbig J., and Mueller R.32, , and , ‘On-road demonstration of NOx emission control for diesel trucks with SINOx urea SCR system’, SAE 1999-01-0111 [Google Scholar]
  33. Miller W., Klein J., Mueller R., Doelling W., and Zürbig J.33, , , and , The development of urea-SCR technology for U.S. heavy-duty trucks’, SAE 2000-01-0190 [Google Scholar]
  34. Jacob E., Emmerling G., Döring A., Graf U., Harris M., van den Tillaart J., and Hupfeld B.34, , , , , and , ‘Reduction of NOx from HD diesel engines with urea SCR compact systems’, 19th Vienna Motor Symp., 7–8 May, 1998, VDI Fortschrittsberichte Reihe 12, Nr. 348, 366-386 [Google Scholar]
  35. Jacob E., and Döring A.35 and , ‘GD-Kat: exhaust treatment system for simultaneous carbon particle oxidation and NOx reduction for Euro 4/5 diesel HD engines’, 21st Vienna Motor Symp., 4-5 May, 2000 [Google Scholar]
  36. Gieshoff J., Schäfer-Sindlinger A., Spurk P. C., van den Tillaart J. A. A., and Garr G.36, , , and , ‘Improved SCR systems for heavy duty applications’, SAE 2000-01-0189 [Google Scholar]
  37. Hawker P. N.37et al., ‘Effect of a continuously regenerating diesel particulate filter on non-regulated emissions and particle size distribution’, SAE 980189 [Google Scholar]
  38. Zelenka P.38et al., Towards securing the particulate trap regeneration: A system combining a sintered metal filter and cerium addition’, SAE 982598 [Google Scholar]
  39. Salvat O., Marez P., and Belot G.39, and , ‘Passenger car serial application of a particulate filter system on a common rail direct injection diesel engine’, SAE 2000-01-0473 [Google Scholar]
  40. 40‘Particle filter for diesel-run cars passes long-term test – New standards mean less health risk from diesel soot’, ADAC and UBA Press Release, Berlin, 28 August 2001
  41. Allansson R., Cooper B.J., Thoss J. E., Uusimäki A., Walker A. P., and Warren J. P.41, , , , and , ‘European experience of high mileage durability of continuously regenerating diesel particulate filter technology’, SAE 2000-01-0480 [Google Scholar]
  42. Lanni T., Chatterjee S., Conway R., and Windawi H42, , , et al., ‘Performance and durability evaluation of continuously regenerating particulate filters on diesel powered urban buses at NY city transit’, SAE 200101-0.511 [Google Scholar]
  43. Voss K.43et al., ‘Engelhard's DPX catalysed soot filter technology for emissions reduction from heavy-duty diesel engines with passive regeneration’, presentation given by R. Kakwani, SAE TOPTEC, Gothenburg, September 2000 [Google Scholar]
  44. Allansson R., Maloney C. A., Walker A. P., and Warren J. P.44, , and , ‘Sulphate production over the CRT: What fuel sulphur level is required to enable the EU 4 and EU 5 PM standards to be met?’, SAE 2000-01-1875 [Google Scholar]
  45. Khair M., Lemaire J., and Fischer S.45, and , ‘Achieving heavy-duty diesel NOx/PM levels below the EPA 2002 standards - an integrated solution’, SAE 200001-0187 [Google Scholar]
  46. Khair M., Lemaire J., and Fischer S.46, and , ‘Integration of EGR, SCR, DPF and fuel-borne catalyst for NOx/PM reduction’, SAE 2000-01-1933 [Google Scholar]
  47. Chandler G. R., Cooper B. J., Harris J. P., Thoss J. E., Uusimäki A., Walker A. P., and Warren J. P.47, , , , , and , ‘An Integrated SCR and continuously regenerating trap system to meet future NOx and PM legislation’, SAE 2000-01-0188 [Google Scholar]

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