Water-cooled internal combustion engine

F - Mech Eng,Light,Heat,Weapons – 01 – P

Patent

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F01P 3/02 (2006.01) F01P 7/14 (2006.01)

Patent

CA 2582848

A water-cooled internal combustion engine has a cylinder head 21 provided with a cylinder head water jacket J h through which cooling water flows. The cylinder head water jacket J h includes a combustion chamber water jacket 70 surrounding combustion chambers 26 and an exhaust passage water jacket 71 around an exhaust manifold passage 38. The exhaust gas discharged from the combustion chambers 26 through exhaust ports 28 flows through the exhaust manifold passage. The exhaust passage water jacket 71 is divided into an upstream water jacket 72a and a downstream water jacket 72b by a partition wall 75. The cooling water flows from both the upstream water jacket 72a and the downstream water jacket 72a into the combustion chamber water jacket 70. Equality in temperature between a combustion chamber wall and an exhaust passage wall is improved and the cylinder head 21 is heated in a uniform temperature distribution.

Un moteur à combustion interne refroidi par eau comporte une culasse 21 pourvue d'une chemise d'eau J h à travers laquelle s'écoule l'eau de refroidissement. La chemise d'eau de la culasse J h comprend une chemise d'eau de chambre de combustion 70 entourant les chambres de combustion 26 et une chemise d'eau de sortie d'échappement 71 entourant un passage de collecteur d'échappement 38. Le gaz d'échappement déchargé des chambres de combustion 26 au moyen des orifices d'échappement 28 traverse le passage du collecteur d'échappement. La chemise d'eau du canal d'échappement 71 est divisée en chemise d'eau amont 72a et en chemise d'eau aval 72b par une cloison de séparation 75. L'eau de refroidissement contenue dans les chemises d'eau amont 72a et aval 72a coule dans la chemise d'eau de la chambre de combustion 70. L'équilibre de température entre une cloison de chambre de combustion et une cloison de canal d'échappement est amélioré, et la culasse 21 est chauffée selon une répartition de température homogène.

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