(19)
(11) EP 1 507 076 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.12.2009 Bulletin 2009/52

(43) Date of publication A2:
16.02.2005 Bulletin 2005/07

(21) Application number: 04103578.3

(22) Date of filing: 26.07.2004
(51) International Patent Classification (IPC): 
F02B 61/02(2006.01)
F02F 1/40(2006.01)
 F02F 1/14(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL HR LT LV MK

(30) Priority: 15.08.2003 JP 2003293723

(71) Applicant: HONDA MOTOR CO., LTD.
Tokyo (JP)

(72) Inventors:
  • Ishikawa, Eiichi, c/o KK Honda Gijutsu Kenkyusho
    Saitama (JP)
  • Hojo, Atsuo, c/o KK Honda Gijutsu Kenkyusho
    Saitama (JP)
  • Kurokawa, Masaya, c/o KK Honda Gijutsu Kenkyusho
    Saitama (JP)

(74) Representative: Poulin, Gérard 
Brevalex 3, rue du Docteur Lancereaux
75008 Paris
75008 Paris (FR)

   


(54) Water-cooled type engine


(57) In a water-cooled engine, to enable a reduction in the size of the engine at or around a cylinder head and to ensure that a cooling water lead-out pipe portion for leading out cooling water from a cooling jacket can be disposed in the cylinder head, while obviating the interference with a valve-operating chamber and securing maintainability of a spark plug.
Valve-operating chamber forming walls 33a, 34a are provided with a recessed portion 158 at a portion thereof corresponding to the other end portion of a camshaft 141 whose one end portion fronts on a chain chamber 151, a spark plug 159 with its rear end portion disposed at the recessed portion 158 is attached to a cylinder head 33 in an inclined state so as to be spaced farther from the chain chamber 151 as one goes away from a combustion chamber 117, and a cooling water lead-out pipe portion 161 disposed on the outer side of the valve-operating chamber forming walls 33a, 34a and deviated from the recessed portion 158 toward the side of either intake valves or exhaust valves is provided in the cylinder head 33 so as to extend substantially in parallel to the cylinder axis C.







Search report