R&D Of ECU Reliability Test Method And Apparatus

Energy saving and environment protecting have became the society themeincreasingly. So the electronic fuel injection (EFI) system is doomed to replacethe traditional carburet in the motorcycle. The system's reliability has been put onan urgent schedule after the FAI engine management system (EMS) had beendeveloped successfully. As the core component of the EMS, ECU is the brain ofthe system. So the ECU's reliability is the most important part in the FAI systemreliability engineering.Firstly, this paper researched the electronic control instrument reliabilityengineering. Then reliability test method and solution was proposed based on theECU's character, considering the project available resource. The ECU ageing testapparatus and data collecting system were manufactured. Finally we did someECU reliability experiences, analysis research and the MTTF determination.This work was conducted in four phases. Firstly, ECU ageing test apparatushas been developed by simulating motorcycle environment based on the analysisof the ECU. It realized the automatic test and ageing function, which became theR&D and mass-produce test bed. It also provided a data resource for the ECUdata collecting system. Secondly, ECU ageing test apparatus and the computerwas linked by using the CAN-Bus. The ECU run parameters in the ageing testapparatus can be sent to the computer through CAN-Bus. And then we designedthe data system windows software with Visual Basic and SQL Server of Microsoft.This software has so strong database and data processing function that the ECUreliability data management becomes so easy. Finally, by using this ECU datasystem, this paper had done some reliability experiences, which helped improvethe ECU design and heighten the ECU reliability.The experience result showed that the ECU reliability solution is effective. Itcould filtrate the early failure products immediately, age and test the ECU for longtime, and determine the MTTF of ECU. The ECU reliability data collectingsystem is reliable and it accord with the demand of reliability test solution.Furthermore, this system established a good ground for the advanced ECUreliability research engineering.