Cooling structure for outboard motor
AssigneeHonda Motor Co., Ltd.
InventorTatsuya Kuroda
Life of this patent
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Abstract
A cooling structure for an outboard motor comprises an oil case which has an oil chamber for storing lubricant oil for an engine. Said cooling structure further comprises: a main exhaust gas passage which guides exhaust gas to a lower side; a cooling water outbound path which guides cooling supply water taken from outside the outboard motor to an upper side, and cools the periphery of the main exhaust gas passage in the oil case by means of the cooling supply water; a cooling water inbound path which guides cooling discharge water that has cooled the engine to the lower side and cools the oil chamber by means of said cooling discharge water; and a mixed fluid passage which, on a side below the oil case, cools the exhaust gas by mixing the exhaust gas and the cooling discharge water.
Claims10
A cooling structure of an outboard motor, the cooling structure being provided below an internal combustion engine and configured to cool an exhaust gas of the internal combustion engine, the cooling structure comprising:
- an oil case including an oil chamber, the oil chamber storing a lubricating oil of the internal combustion engine;
- a main exhaust gas passage that guides the exhaust gas to a lower side;
- a cooling water inlet path that guides, to an upper side, cooling supply water that has been taken in from outside of the outboard motor, and that cools, in the oil case, a periphery of the main exhaust gas passage by the cooling supply water;
- a cooling water outlet path that guides, to the lower side, cooling discharge water that has cooled the internal combustion engine, and that cools the oil chamber by the cooling discharge water;
- and
- a mixed fluid passage that, below the oil case, cools the exhaust gas by mixing the exhaust gas and the cooling discharge water.
Dependencies are inferred from the claim text.