发动机冷却系统设计

目 录

摘要 ········································································································································ 2 Abstract ······························································································································· 3 1引言 ····································································································································· 4

1.1 课题的背景和意义 ··································································································· 4

1.2 国内外发动机冷却系统研究现状及发展方向 ······················································· 4

1.3 本次设计的主要内容 ······························································································· 6 2 475Q汽油机工作过程计算 ····························································································· 7

2.1已知条件 ···················································································································· 7

2.2 参数选择 ··················································································································· 8

2.3 额定工况工作过程计算 ··························································································· 8 3 475Q汽油机冷却系统的设计 ······················································································· 11

3.1 冷却系统的作用 ····································································································· 11

3.2 冷却系统的设计要求 ····························································································· 11

3.3 冷却系统的总体设计方案和参数选取 ································································· 11

3.4 散热器设计及选型 ································································································· 13

3.5 风扇的设计及选型 ································································································· 18

3.6水泵设计及选型 ······································································································ 24

3.7 475Q汽油机冷却系统的调节机构 ········································································ 29 4 475Q汽油机冷却系统整体布置图 ············································································· 35 5 结论 ·································································································································· 36 总结与体会 ························································································································· 37 谢辞 ······································································································································ 38 参考文献 ····························································································································· 39 附录1 475Q汽油机工作过程计算源代码及运行结果 ·············································· 40 附录2 475Q汽油机冷却系统布置图 ··········································································· 51 附录3 475Q汽油机纵剖面图 ························································································ 52 1