(19)
(11) EP 4 159 989 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.04.2023 Bulletin 2023/16

(43) Date of publication A2:
05.04.2023 Bulletin 2023/14

(21) Application number: 22195501.6

(22) Date of filing: 14.09.2022
(51) International Patent Classification (IPC): 
F02B 75/04(2006.01)
(52) Cooperative Patent Classification (CPC):
F02B 75/048
(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: 30.09.2021 JP 2021161719
08.10.2021 JP 2021166512

(71) Applicant: HONDA MOTOR CO., LTD.
Minato-ku Tokyo 107-8556 (JP)

(72) Inventors:
  • CHO, Masaki
    Wako-shi, Saitama, 351-0193 (JP)
  • TAKI, Masafumi
    Wako-shi, Saitama, 351-0193 (JP)
  • OKANO, Noriaki
    Wako-shi, Saitama, 351-0193 (JP)
  • TOMIZAWA, Kengo
    Wako-shi, Saitama, 351-0193 (JP)

(74) Representative: Kiwit, Benedikt 
Mitscherlich PartmbB Patent- und Rechtsanwälte Sonnenstraße 33
80331 München
80331 München (DE)

   


(54) VARIABLE COMPRESSION-RATIO DEVICE


(57) An object is to provide oil supply to a variable compression-ratio device. A variable compression-ratio device includes: a gear shaft (52) disposed inside a crankshaft (12) of an internal combustion engine (11) coaxially with the crankshaft (12) and configured to be rotationally driven by a power source (32); an input gear (51) connected to the gear shaft (52); an intermediate gear (50) supported by a crank web (16) of the crankshaft (12) and engaged with the input gear (51); an eccentric cam (31) disposed between a crank pin (17) of the crankshaft (12) and a large end (18a) of a connecting rod (18) and engaged with the intermediate gear (50); and a first oil channel (5) configured to supply lubricating oil to the input gear (51).







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