混合动力汽车故障数据记录系统设计

A fault data recording system design for hybrid-electric vehicles

以某ISG(integrated starter and generater)型混合动力电动汽车为研究对象,开展混合动力电动汽车故障诊断数据记录系统的研究。通过CAN总线和K线的应用,建立混合动力汽车故障诊断信息数据采集的通讯网络。设计了包括CPU处理模块、通信模块、USB存储模块等故障诊断数据记录系统的硬件结构。针对系统要求和特点,在系统硬件方案设计、软件设计的基础上,对USB在系统中实现数据的海量信息存储应用进行了具体的电路设计和分析。在车辆行驶信息记录实验过程中,该故障信息记录系统运行稳定,数据记录完整、准确,在线显示的参数也能较好地反映车辆行驶状态。

A data recording system for fault diagnosis of hybrid-electric vehicles was studied by taking the integrated starter and generator （ISG） hybrid electric vehicle as the investigation object. The fault diagnosis communication net was established using a CAN bus and a K line. As designed, the system hardware structure included a CPU processing module, a communication module, and a USB recording module. With the system requirements and characteristics in mind, special circuit design and analysis of USB mass storage module were carried out based on the hardware scheme and software design. In the running test, the fault data recording system worked stably, and the data was recorded integrally and correctly. At the same time, the online display data accurately reflected the vehicle＇s running status.