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基于VSP分布的车辆跟驰模型的油耗测算对比研究

Keywords: 汽车工程,全速度差,机动车比功率,车辆跟驰模型,油耗

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Abstract:

利用GPS收集了大量北京市快速路上车辆跟驰状态下的驾驶行为数据。以GPS采集的行为数据为前车驾驶数据,采用不同车辆跟驰模型来模拟并输出后车的跟驰行为。对连续的瞬时速度按照60s集成并且划分平均速度区间,在同速度区间内对比分析了不同跟驰模型输出的机动车比功率(VSP)分布与真实分布的差异。其后,利用车载油耗仪收集实测的逐秒油耗数据,采用基于VSP分布的油耗测算方法,测算并对比了不同跟驰模型的平均油耗率和油耗因子与真实油耗的差异。研究发现前后车全速度差是车辆跟驰模型中的关键参数,其能明显提升仿真跟驰行为VSP分布的准确性,进而更准确地测算车辆跟驰状态下的燃油消耗。

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