(19)

(11)

EP 0 506 698 A1

(12)

(43) Date of publication: 07.10.1992 Bulletin 1992/41 (21) Application number: 91900229.0 (22) Date of filing: 05.12.1990

(51) International Patent Classification (IPC):  F02D 41/ 00( . ) F02B 61/ 04( . ) F02M 25/ 08( . ) (86) International application number: PCT/EP1990/002105 (87) International publication number: WO 1991/009221 (27.06.1991 Gazette 1991/14)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 18.12.1989 US 19890452664 08.03.1990 US 19900490791 04.10.1990 US 19900591219 (71) Applicant: SIEMENS AKTIENGESELLSCHAFT D-80333 München (DE)	(72) Inventor: COOK, John, Edward Chatham, Ontario N7L 2S8 (CA)