Method of Power Performance Fault Alarm of Hybrid Electric Vehicle Based on Hydraulic Technology

摘要

Due to the lack of precision in the modeling of the vehicle power system, the fault diagnosis and alarm accuracy of the current hybrid vehicle dynamic performance fault alarm method is reduced.Therefore, a hybrid vehicle dynamic performance fault alarm method based on hydraulic technology is designed.The power system model of hybrid electric vehicle is built by hydraulic technology, which is the data base of fault diagnosis.The method of self-diagnosis and the knowledge base of fault diagnosis are used to realize the fault diagnosis of vehicle power system.The interface between mobile network and on-board information is selected to realize vehicle fault alarm by setting alarm information content.The fault diagnosis accuracy of this method is always between 88.5% and 94.5%, the fault diagnosis time is less than 0.5 s, and the highest effective failure alarm rate is 99.8%.The experimental results show that the research method has the advantages of high accuracy, short diagnosis time, high effective alarm rate, low cost, superior economic performance and good application effect.