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发明授权
CN107002591B 多气缸发动机的气缸盖 有权

多气缸发动机的气缸盖
摘要：
第一冷却剂流动通路(34)设置成在气缸盖(101)的纵向上延伸。在垂直于纵向的截面中的至少一个截面中，第一冷却剂流动通路(34)位于包含多个燃烧室(4)的中心轴线且平行于纵向的平面(S1)与包含多个进气口(2)的中心轨道的中心轨道面(S2)之间。在垂直于纵向的截面中的至少一个截面中，第二冷却剂流动通路的至少一部分(20g)位于燃烧室(4)与第一冷却剂流动通路(34)之间。温度低于在第二冷却剂流动通路(20g)中流动的冷却剂的温度的冷却剂在第一冷却剂流动通路(34)中流动。
摘要（英）：

A first coolant flow passage is provided to extend in a longitudinal direction of a cylinder head. In at least one of cross sections perpendicular to the longitudinal direction, the first coolant flow passage is located between a flat plane including central axes of a plurality of combustion chambers and parallel to the longitudinal direction and a central line plane including central lines of a plurality of intake ports. In at least one of cross sections perpendicular to the longitudinal direction, at least a portion of a second coolant flow passage is located between the combustion chamber and the first coolant flow passage. A coolant at a temperature lower than that of a coolant flowing in the second coolant flow passage flows in the first coolant flow passage.

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