混合动力客车纯电模式下转向失灵问题研究

Study on Steering Failure of Hybrid Electric Bus in Pure Electric Mode

针对混合动力客车纯电模式下发生转向失灵的问题,通过分析同步采集的发动机数据和混合动力控制系统数据,确定纯电模式下,发动机磁电式转速传感器受电磁干扰,导致发动机未运转的情况下发出异常转速信号,并引起转向助力动力切换,是导致转向失灵的根本原因。通过更换霍尔式转速传感器并增加信号滤波处理,同时优化转向助力切换控制逻辑,能够有效解决转向失灵的问题。

In view of the steering failure of the hybrid electric bus in the pure electric mode,the engine data and the hybrid control system data are analyzed synchronously.It is determined that the magnetoelectric sensor is subjected to electromagnetic interference in the pure electric mode,which causes the abnormal increase of the engine speed and the switching of the steering assist power.It can effectively solves the problem of steering failure by replacing the Hall-type speed sensor,adding speed signal filtering processing,and optimizing the steering assist switching control logic.