(19)
(11) EP 0 704 605 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
27.11.1996 Bulletin 1996/48

(43) Date of publication A2:
03.04.1996 Bulletin 1996/14

(21) Application number: 95115427.7

(22) Date of filing: 29.09.1995
(51) International Patent Classification (IPC)6: F01L 1/344
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 30.09.1994 JP 261826/94

(71) Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA
Iwata-shi Shizuoka-ken, 438 (JP)

(72) Inventors:
  • Uchiyama, Shigenobu, c/o Yamaha Hatsudoki K.K.
    Iwata-shi, Shizuoka-ken (JP)
  • Yoshikawa, Masaaki, c/o Yamaha Hatsudoki K.K.
    Iwata-shi, Shizuoka-ken (JP)
  • Takahashi, Hironao, c/o Yamaha Hatsudoki K.K.
    Iwata-shi, Shizuoka-ken (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
D-80538 München
D-80538 München (DE)

   


(54) Internal combustion engine with a cam phase variation apparatus


(57) This invention concerns internal combustion engines comprising an engine block including a cylinder head unit attached to a cylinder block, a valve actuating mechanism including at least one camshaft, a camshaft drive mechanism including a cam sprocket associated to the camshaft, and a cam phase variation apparatus for varying the angular relation between said camshaft and cam sprocket, said cam phase variation apparatus including an operating mechanism mounted on the camshaft and a hydraulic actuation means connected with said operating mechanism. The engine has been improved in that the hydraulic actuation means forms a pre-assembled unit attached to the engine block from the outside.






Search report