(19)
(11) EP 2 674 641 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
20.05.2015 Bulletin 2015/21

(43) Date of publication A2:
18.12.2013 Bulletin 2013/51

(21) Application number: 13180600.2

(22) Date of filing: 29.08.2008
(51) International Patent Classification (IPC): 
F16H 9/18(2006.01)
F02B 75/06(2006.01)
F02B 61/02(2006.01)
(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: 31.08.2007 JP 2007227088
03.12.2007 JP 2007312912
21.04.2008 JP 2008109854

(62) Application number of the earlier application in accordance with Art. 76 EPC:
08252876.1 / 2031210

(71) Applicant: Yamaha Hatsudoki Kabushiki Kaisha
Iwata-shi, Shizuoka-ken 438 (JP)

(72) Inventor:
  • Nakayama, Yoshiharu
    Shizouka-ken, 438-8501 (JP)

(74) Representative: Moreland, David 
Marks & Clerk LLP Aurora 120 Bothwell Street
Glasgow G2 7JS
Glasgow G2 7JS (GB)

   


(54) Engine and straddle type vehicle


(57) An engine of the invention includes a crankshaft including a crank web; a clutch shaft disposed behind the crankshaft and provided with a clutch; a balancer shaft disposed in front of the crankshaft and provided with a balancer weight; a crankcase for accommodating the crankshaft, the balancer shaft and the clutch shaft; a cylinder section attached to the crankcase; and a starter motor disposed above the cylinder section and capable of driving the crankshaft, wherein the balancer shaft is disposed between a first horizontal surface intersecting an axial center of the crankshaft when the engine is mounted on a vehicle and a second horizontal surface intersecting a lower end of the crank web when the engine is mounted on the vehicle, the balancer weight is disposed below the first horizontal surface, and the starter motor is disposed forward of a vertical surface intersecting the axial center of the crankshaft when the engine is mounted on the vehicle.







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Search report