(19)
(11) EP 4 739 897 A1

(12)

(43) Date of publication:
13.05.2026 Bulletin 2026/20

(21) Application number: 23745230.5

(22) Date of filing: 04.07.2023
(51) International Patent Classification (IPC): 
F02F 1/38(2006.01)
F02F 1/40(2006.01)
 F01P 3/16(2006.01)
F02F 7/00(2006.01)
(52) Cooperative Patent Classification (CPC):
F02F 1/40; F02F 1/38; F01P 2003/006; F01P 3/16; F02F 7/006
(86) International application number:
PCT/FI2023/050423
(87) International publication number:
WO 2025/008560 (09.01.2025 Gazette 2025/02)
(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(71) Applicant: Wärtsilä Finland Oy
65170 Vaasa (FI)

(72) Inventors:
  • SUNDSTEN, Magnus
    65170 Vaasa (FI)
  • NIINIKANGAS, Saku
    65170 Vaasa (FI)
  • MÄKINEN, Katri
    65170 Vaasa (FI)

(74) Representative: Berggren Oy 
P.O. Box 16 Fabianinkatu 21
00101 Helsinki
00101 Helsinki (FI)

   


(54) CYLINDER HEAD, CYLINDER HEAD COVER, CYLINDER HEAD ASSEMBLY AND PISTON ENGINE