混合动力城市客车运行工况参数的探讨

采用自行研制的基于汽车电控系统数据流功能的检测系统对城市客车的实际运行工况进行了测试。测量发动机转速、节气门开度、车速以及载客量并进行数理统计,结果表明城市客车的停车时间、车速、加速度、减速度、载客量等参数均符合正态分布,怠速时间占运行总时间的25.3%,加速和减速时间占69.1%,匀速时间占5.6%。混合动力城市客车针对实际运行工况采用优化的控制策略,如限制发动机怠速、减小发动机功率、改善发动机的工作状态、采用再生制动,可以明显降低燃油消耗和排放。

Study on the parameter of hybrid electric city bus driving cycle

City bus driving cycle plays an important role on control strategy of hybrid electric vehicle.A testing system based on Data Stream function of vehicle electronic control system was developed to test the city bus driving cycle.By measuring such parameters as engine speed,throttle position,vehicle speed and passenger number,statistic results indicated that parking time,vehicle speed,acceleration,deceleration and passenger number accorded with normal school.In all the running time of a city bus,idle speed time account for 25.3 percent,acceleration and deceleration time 69.1 percent,and even speed time account for 5.6 percent only.According to the driving cycle developed,hybrid electric city bus control strategy was optimized.Research result indicated that engine consumed less fuel by such means as engine idle speed cycle limited,using small power engine,improving engine's running state and adopting regenerative brake technic.