(19)

(11)

EP 2 142 771 A1

(12)

(43) Date of publication: 13.01.2010 Bulletin 2010/02 (21) Application number: 07825368.9 (22) Date of filing: 02.05.2007

(51) International Patent Classification (IPC):  F01N 3/20(2006.01) B01D 53/94(2006.01) (86) International application number: PCT/IB2007/003065 (87) International publication number: WO 2008/135805 (13.11.2008 Gazette 2008/46)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (71) Applicant: Perkins Engines Company Limited Peterborough PE1 5NA (GB)	(72) Inventor: HEATON, David, Mark Peoria, Illinois 61629-9510 (US) (74) Representative: Preuss, Udo  Kramer - Barske - Schmidtchen Landsberger Strasse 300 80687 München 80687 München (DE)