混合动力汽车底盘液压控制系统集成化诊断方法研究

Research on Integrated Diagnosis Method of Chassis Hydraulic Control System for Hybrid Electric Vehicle

底盘液压控制系统是混合动力汽车底盘域中关键的系统,针对混合动力汽车底盘液压控制系统故障诊断精度下降,故障诊断覆盖率过低的问题,在混合动力汽车底盘液压控制系统结构和集成化诊断拓扑结构基础上,构建了关键部件的精细化模型,采用分段故障阈值方法对底盘液压控制系统进行故障检测,并对故障检测结果进行防抖处理,在构建的混合动力汽车底盘液压控制系统故障模拟实验平台进行故障注入试验,实验结果表明,所采用的故障诊断方法能够提高故障诊断速率和覆盖率,确保故障诊断精度。

Chassis hydraulic control system is a key system in the chassis domain of hybrid electric vehicle.In view of the decline of fault diagnosis accuracy and low fault diagnosis coverage of hybrid electric vehicle chassis hydraulic control system,a refined model of key components is constructed based on the structure of hybrid electric vehicle chassis hydraulic control system and integrated diagnosis topology,The segmented fault threshold method is used to detect the fault of the chassis hydraulic control system,and the fault detection results are anti shake processed.The fault injection test is carried out on the fault simulation experimental platform of the hybrid electric vehicle chassis hydraulic control system.The experimental results show that the adopted fault diagnosis method can improve the fault diagnosis rate and coverage,Ensure the accuracy of fault diagnosis.