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    • 5. 发明申请
    • CYLINDER HEAD OF MULTI-CYLINDER ENGINE
    • 多缸发动机气缸盖
    • WO2016075521A1
    • 2016-05-19
    • PCT/IB2015/002085
    • 2015-11-10
    • TOYOTA JIDOSHA KABUSHIKI KAISHA
    • TOFUKUJI, SatokoKUMAGAI, AtsunoriKAWAMOTO, Nobuki
    • F01P3/02F02F1/40
    • F01P3/02F01P3/14F01P7/026F01P11/04F01P2003/024F01P2050/22F02F1/40
    • 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).
    • 第一冷却剂流动通道(31,32)设置成在气缸盖(101)的纵向方向上延伸。 在垂直于纵向方向的至少一个横截面中,第一冷却剂流动通道(31,32)位于包括多个燃烧室(4)的中心轴线并平行于纵向方向的平面(S1)之间 和包括多个进气口(2)的中心线的中心线平面(S2)。 在垂直于纵向方向的至少一个横截面中,第二冷却剂流动通道的至少一部分(20c)位于气缸盖(101)的气缸体配合表面(1a)和进气口中心线 平面(S2)。 在比第二冷却剂流路(20c)流动的冷却剂低的温度下的冷却剂在第一冷却剂流路(31,32)中流动。