(19)

(11)

EP 2 227 621 A1

(12)

(43) Date of publication: 15.09.2010 Bulletin 2010/37 (21) Application number: 09701195.1 (22) Date of filing: 02.01.2009

(51) International Patent Classification (IPC):  F01N 3/033(2006.01) F01N 1/08(2006.01) F01N 3/021(2006.01) F01N 1/10(2006.01) (86) International application number: PCT/FI2009/050003 (87) International publication number: WO 2009/087270 (16.07.2009 Gazette 2009/29)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (30) Priority: 09.01.2008 FI 20085013 (71) Applicant: Wärtsilä Finland Oy 65380 Vaasa (FI)	(72) Inventor: LARSON, Leif FI-65100 Vaasa (FI) (74) Representative: Gustafsson, Aulis Valdemar et al AWEK Industrial Patents Ltd Oy P.O. Box 230 00101 Helsinki 00101 Helsinki (FI)