| 摘要 |
In an engine of a cylinder-head first cooling type, cooling performance for a cylinder head and a cylinder block is enhanced. Cooling water from a water pump is supplied via a water jacket in a cylinder head to a water jacket in a cylinder block. The water jacket in the cylinder head is defined to extend along opposite sides of a plurality of cylinders disposed in a row, and has a cooling-water inlet and a cooling-water outlet provided at lengthwise one end thereof and the lengthwise other end thereof, respectively. The water jacket in the cylinder block is defined to surround outer peripheries of the plurality of cylinders disposed in the row, and is shielded at one point by a shield member, and has a cooling-water inlet provided on one side of the shield member to communicate with the cooling-water outlet in the water jacket in the cylinder head and a cooling-water outlet provided in the other side of the shield member.
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