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(11)

EP 2 150 702 A1

(12)

(43) Date of publication: 10.02.2010 Bulletin 2010/06 (21) Application number: 08742711.8 (22) Date of filing: 10.04.2008

(51) International Patent Classification (IPC):  F04C 2/344(2006.01) F04C 18/344(2006.01) (86) International application number: PCT/US2008/004616 (87) International publication number: WO 2008/124174 (16.10.2008 Gazette 2008/42)

(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 MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 10.04.2007 US 922683 P (71) Applicant: BorgWarner Inc. Auburn Hills, MI 48326 (US)	(72) Inventor: GUO, Chengyun Novi, MI 48377 (US) (74) Representative: Schmitz, Hans-Werner  Hoefer & Partner Patentanwälte Pilgersheimer Strasse 20 81543 München 81543 München (DE)