| 摘要 |
Disclosed is a water-cooled 4-stroke cycle internal combustion engine for propelling ships having a cylinder head and a cylinder block, comprising a plurality of connecting bolts for detachably connecting the cylinder head with the cylinder block arranged around a cylinder with substantially equal distances from a center axis of the cylinder, an exhaust passage formed in t he cylinder head positioned on one side of the cylinder and opening on a connecting face to the cylinder block, cooling water passage means disposed at location s around the exhaust passage in the cylinder head and opening an the connectin g face, an exhaust passage formed in the cylinder block positioned on the one side of the cylinder and opening on a connecting face to the cylinder head to communicate with the exhaust passage in the cylinder head, cooling water passage means disposed at locations around the exhaust passage in the cylinder block and opening on the connecting face to the cylinder head to communicate with the cooling water passage means in the cylinder head, a lubricating oil passage formed in the cylinder head positioned on a side of the cylinder displaced from the side of the cylinder containing the exhaust passage and opening on the connecting face to the cylinder block, and a lubricating oil passage formedin the cylinder block positioned on a same side of the cylinde r as the lubricating oil passage in the cylinder head and opening on the connecting face to the cylinder head to communicate with the lubricating oil passage in the cylinder head.
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