(19)

(11)

EP 1 226 428 A1

(12)

(43) Date of publication: 31.07.2002 Bulletin 2002/31 (21) Application number: 00972324.8 (22) Date of filing: 20.10.2000

(51) International Patent Classification (IPC)7: G01N 27/407 (86) International application number: PCT/US0029/147 (87) International publication number: WO 0129/552 (26.04.2001 Gazette 2001/17)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 20.10.1999 US 160733 P (71) Applicant: Delphi Technologies, Inc. Troy, MI 48007-5052 (US)	(72) Inventors: DETWILER, Eric, J. Davison, MI 48423 (US) COHA, Jeffrey, T. Flint, MI 48507 (US) WANG, Da, Yu Troy, MI 48084 (US) (74) Representative: Denton, Michael John et al Delphi Automotive Systems,Centre Technique Paris,117, avenue des Nations,B.P. 60059 95972 Roissy Charles de Gaulle Cédex 95972 Roissy Charles de Gaulle Cédex (FR)