轻型汽车动力总成的匹配与优化
关键词 动力总成；综合评价体系；参数敏感度
毕业论文设计说明书（论文）外文摘要
Title Matching and Optimization of a Light Vehicle Powertrain
Abstract
In order to improve the automotive performance of an Off-road vehicle, this paper focused on matching and optimization of its powertrain. According to the Market Positioning of target models, a weight distribution for each category and subcategory was set up to build a comprehensive evaluation system, which is designed to evaluate the power and fuel economy, by using an improved algorithm. A vehicle model is created by software AVL CRUISE based on what 16 different kinds of transmission systems can be evaluated by the proposed comprehensive evaluation system and select the best model. Choosing 5 parameters, analyzed the sensitivity based on the selected model. The comprehensive evaluation of the selected model has increased by 25.7% compared with the original model, and further optimal advices are put forward.
Keywords powertrain; comprehensive evaluation system; sensitivity
目次
1 绪论 1
1.1 研究的背景及意义 1
1.2 动力总成的匹配与优化 2
1.3 本文研究的主要内容 3
2 理论基础[6] 3
2.1 汽车的动力性 3
2.2 汽车的燃油经济性 4
2.3 汽车的排放性 5
3 综合评价体系 6
3.1 评价指标的选择 6
3.2 评价指标的量纲统一化 7
3.3 各评价指标权重系数的确定[7] 9
4 动力总成匹配及结果分析 10
4.1 AVL CRUISE软件 10
4.2 模型的建立和修正 11
4.3 动力传动系匹配优化设计计算 12
4.4 计算分析 14
5 参数敏感度研究 15
5.1 潜在优化参数 16
5.2 参数敏感度研究方法 16
5.3 敏感度计算及分析 17
结论 26
致谢 27
参考文献 28
附录 30
表1 整车参数 30
表2 两种发动机外特性 30
表3 两种发动机万有特性 31
表4 最高转速仿真计算结果 32
表5 最高转速的敏感度 32
表6 一档传动比仿真计算结果 32
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