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发明授权
CN106922161B 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(31，32)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(31，32)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(20c)位于气缸盖(101)的气缸体配合面(1a)与进气口的中心轨道面(S2)之间。温度低于在第二冷却剂流动通路(20c)中流动的冷却剂的温度的冷却剂在第一冷却剂流动通路(31，32)中流动。
摘要（英）：

A first coolant flow passage (31, 32) is provided to extend in a longitudinal direction of a cylinder head (101). In at least one of cross sections perpendicular to the longitudinal direction, the first coolant flow passage (31, 32) is located between a flat plane (S1) including central axes of a plurality of combustion chambers (4) and parallel to the longitudinal direction and a central line plane (S2) including central lines of a plurality of intake ports (2). In at least one of cross sections perpendicular to the longitudinal direction, at least a portion (20c) of a second coolant flow passage is located between a cylinder block mating surface (la) of the cylinder head (101) and the intake port central line plane (S2). A coolant at a temperature lower than that of a coolant flowing in the second coolant flow passage (20c) flows in the first coolant flow passage (31, 32).

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