(19)

(11)

EP 2 137 388 A1

(12)

(43) Date of publication: 30.12.2009 Bulletin 2009/53 (21) Application number: 07748019.2 (22) Date of filing: 16.04.2007

(51) International Patent Classification (IPC):  F01N 3/032(2006.01) (86) International application number: PCT/SE2007/000354 (87) International publication number: WO 2008/127156 (23.10.2008 Gazette 2008/43)

(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: Volvo Lastvagnar AB 405 08 Göteborg (SE)	(72) Inventors: ANDERSSON, Arne S-435 42 Mölnlycke (SE) ANDERSSON, Lennart S-432 95 Varberg (SE) (74) Representative: Fröhling, Werner Otto  Volvo Technology Corporation Corporate Patents 06820, M1.7 405 08 Göteborg 405 08 Göteborg (SE)