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整车动力经济性速比匹配优化策略
投稿时间:2016-08-19  修订日期:2017-01-17  点此下载全文
引用本文:占华,方立桥,赖宇阳.整车动力经济性速比匹配优化策略[J].计算机辅助工程,2017,26(2):20-26.
作者单位E-mail
占华 一汽海马汽车有限公司 zhanh@haima.com 
方立桥 树优信息技术有限公司 技术部  
赖宇阳 树优信息技术有限公司 技术部  
中文摘要:基于PIAnO优化平台,通过试验设计、近似模型和优化设计方法获得传动速比优化方案.根据测试数据对动力燃油经济性仿真模型进行标定以提高其精度.在标定后的模型上进行传动速比的优化设计,获得具有较高动力经济性能的速比匹配方案.新仿真模型的3,4和5挡加速时间和最大爬坡能力与测试数据一致,百公里加速时间的偏差从2.50%提高到0.14%,百公里综合油耗与测试数据相比由16.4%提高到0.6%;在满足所有动力性能设计的要求下,百公里综合油耗从8.450 L下降到8.172 L,下降3.29%;同时,优化时间由原来的1~2周减少到2 d,极大提高产品开发效率.
中文关键词:汽车  油耗  速比  模型标定  试验设计  近似模型  灵敏度
 
Speed ratio matching optimization strategy for vehicle power economy
Abstract:A transmission speed ratio optimization scheme is obtained by design of experiment, approximation model, and optimization design method on platform PIAnO. According to the test data, the simulation model for power fuel economy is calibrated to improve its accuracy. The transmission speed ratio is optimized on the calibrated model and a speed ratio matching scheme with high dynamic economic performance is achieved. The results show that the optimization strategy is very effective for the analysis model calibration and transmission ratio optimization. The acceleration time on 3rd, 4th and 5th gear and maximum climbing capacity of the new model are consistent with the test data, the deviation of acceleration time of 100 km/h improves from 2.5% to 0.14%. Comparing with the test data, the comprehensive fuel consumption per hundred kilometers improves 16.4% from 0.6%. Under all the dynamics design requirements, the comprehensive fuel consumption per hundred kilometers declines from 8.450 L to 8.172 L, which means that the fuel is saved by 3.29%. At the same time, the optimization time is reduced from 1~2 weeks to 2 d, and so the efficiency of the product development is greatly improved.
keywords:automobile  fuel consumption  speed ratio  model calibration  design of experiment  approximation model  sensitivity
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