(19)

(11)

EP 0 998 626 A1

(12)

(43) Date of publication: 10.05.2000 Bulletin 2000/19 (21) Application number: 98929395.6 (22) Date of filing: 22.05.1998

(51) International Patent Classification (IPC)7: F01N 3/04 (86) International application number: PCT/EP9803/177 (87) International publication number: WO 9853/186 (26.11.1998 Gazette 1998/47)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB IE IT LI LU NL PT SE (30) Priority: 23.05.1997 EP 97830240 (71) Applicant: Pagani, Achille 20020 Lazzate (Milano) (IT)	(72) Inventor: Pagani, Achille 20020 Lazzate (Milano) (IT) (74) Representative: Checcacci, Giorgio  Porta, Checcacci & Associati S.p.A.Viale Sabotino 19/2 20135 Milano 20135 Milano (IT)