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곽인재(Injae Kwak),김신명(Shinmyong Kim),고동현(Donghyun Ko),문용현(Yonghyun Moon) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
To achieve more than ever reinforcement of exhaust gas emission regulation on recent days, numerous OBD calibration engineer have hard worked to avoid miss and wrong diagnostic detection with mal-function emission system and component. In this study, the evaporation diagnostic of gasoline fuel leakage delivery system with statistical analysis approach to avoid various calibration results by calibration engineer’s experience and capability with conventional approach. To begin with system analysis which is to clarify system input and output, noise parameter impact on the system. Each vehicle test was performed with variation of fuel level which was came from system analysis, test results are treated as a sample, so we calibrated OBD thresholds using by various statistical methods. It also need to verify that sample could be represent a population then make robust OBD calibration adapted by confidence level and interval to ensure that no miss and wrong diagnostic during vehicle life cycle.