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(11)

EP 4 392 654 A2

(12)

(88) Date of publication A3: 06.04.2023 (43) Date of publication: 03.07.2024 Bulletin 2024/27 (21) Application number: 22772709.6 (22) Date of filing: 24.08.2022

(51) International Patent Classification (IPC):  F02D 41/38(2006.01) F02D 41/00(2006.01) F02B 71/00(2006.01) F02B 75/02(2006.01) F02M 31/04(2006.01) F02D 19/06(2006.01) F02D 35/02(2006.01) F02M 31/13(2006.01) F02B 75/28(2006.01) F02D 13/02(2006.01) (52) Cooperative Patent Classification (CPC): F02B 3/06; F02D 41/38; F02D 19/0649; F02D 41/0025; F02D 35/02; F02D 35/025; F02D 2200/0612; F02D 2200/0611; F02M 31/042; F02D 2400/00; F02D 2400/04; F02M 31/13; F02D 41/006; F02D 13/0269; F02B 7/04; F02M 31/08; Y02T 10/30 (86) International application number: PCT/US2022/041391 (87) International publication number: WO 2023/028156 (02.03.2023 Gazette 2023/09)

(84) Designated Contracting States: AL 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 RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 25.08.2021 US 202163236965 P (71) Applicant: Clearflame Engines, Inc. Geneva, IL 60134 (US)	(72) Inventors: BLUMREITER, Julie Batavia, Illinois 60510 (US) JOHNSON, Bernard Chicago, Illinois 60605 (US) SCHANZ, Robert Aurora, Illinois 60502 (US) VITTAL, Manohar Naperville, Illinois 60564 (US) (74) Representative: Cooley (UK) LLP  22 Bishopsgate London EC2N 4BQ London EC2N 4BQ (GB)