Engine for outboard engine system

Details Engine for outboard engine system Engine for outboard engine system

B - Operations, Transporting

63

H

B63H 20/00 (2006.01) F01P 3/02 (2006.01) F02B 61/04 (2006.01) F02B 75/20 (2006.01) F02F 1/10 (2006.01) F02F 1/42 (2006.01) F02B 75/02 (2006.01) F02B 75/18 (2006.01)

Patent

CA 2228583

A cylinder block is coupled to a cylinder block/cylinder head coupling surface of a cylinder head by ten bolts which are disposed to surround outer peripheries of combustion chambers. In order to enhance sealability of an opening of a cooling water passage defined radially outside the bolts as viewed from the combustion chambers, the cylinder block and the cylinder head are further fastened to each other by a bolt disposed in the vicinity of the opening. Thus, the fastening force of the cylinder block/cylinder head coupling surface can be increased to increase the degree of freedom in design of the opening of the cooling water passage defined in the coupling surface.

L'invention porte sur un bloc-cylindres couplé à une surface de couplage du bloc-cylindres/culasse d'une culasse au moyen de dix boulons disposés de façon à entourer les périphériques externes des chambres de combustion. Il est possible d'améliorer l'étanchéité d'un orifice d'une conduite d'eau de refroidissement, lequel est défini radialement à l'extérieur des boulons du point de vue des chambres de combustion, en fixant davantage le bloc-cylindres à la culasse au moyen d'un boulon placé près de l'orifice. La force de fixation de la surface de couplage du bloc-cylindres/culasse peut donc être accrue afin d'augmenter le degré de liberté dans la conception de l'orifice de la conduite d'eau de refroidissement qui est défini dans la surface de couplage.

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