(19)

(11)

EP 2 082 121 A1

(12)

(43) Date of publication: 29.07.2009 Bulletin 2009/31 (21) Application number: 06812958.4 (22) Date of filing: 31.10.2006

(51) International Patent Classification (IPC):  F01N 3/023(2006.01) B01D 41/00(2006.01) (86) International application number: PCT/SE2006/001234 (87) International publication number: WO 2008/054262 (08.05.2008 Gazette 2008/19)

(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 NL PL PT RO SE SI SK TR (71) Applicant: Volvo Lastvagnar AB 405 08 Göteborg (SE)	(72) Inventors: RAMFELT, Paulina S-436 39 Askim (SE) KARLSSON, Carl-Johan S-413 20 Göteborg (SE) JOBSON, Edward S-442 77 Romelanda (SE) (74) Representative: Fröhling, Werner Otto  Volvo Technology Corporation Corporate Patents 06820, M1.7 405 08 Göteborg 405 08 Göteborg (SE)