吉林大学学报(工学版) ›› 2018, Vol. 48 ›› Issue (5): 1366-1373.doi: 10.13229/j.cnki.jdxbgxb20170742
曹骞, 李君, 刘宇, 曲大为
CAO Qian, LI Jun, LIU Yu, QU Da-wei
摘要: 针对乘用车现阶段油耗国标测试结果与实际道路行驶相差较大的问题,研究了长春市乘用车代表性行驶工况。针对长春市乘用车采集一年行驶数据,获得有效数据3 538 335条,应用聚类和马尔科夫链方法构建代表工况,并与上海工况及NEDC工况进行对比分析。结果表明:构建工况与数据库总体的平均偏差为4.03%,远低于10%的偏差要求,能够准确反映长春市乘用车的行驶特征;长春工况与上海工况及NEDC工况相比差异较大,特征值平均偏差分别为22.7%和21.1%,中国城市行驶工况存在明显差异,现行NEDC工况难以准确描述中国乘用车行驶特征,构建符合国情的行驶工况十分必要。本文结果为提升长春市乘用车测试和评价结果准确性提供了有益参考。
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