승용디젤엔진 LP-EGR 고장진단 연구

Abstract

HP-EGR which is used in the existing diesel engine is the method of circulating the emission gas burned at high pressure from the front end of turbine to the rear end of compressor, and LP-EGR which is applied to resolve the disadvantage of HP-EGR is adopted with the advantages of accomplishing relatively lower pressure and lower EGR gas temperature compared to HP-EGR system by recirculating the emission gas which does not have contaminants because of being passed through DPF. The objective of this study is to improve the existing maintenance method of simple sequential exchange of single part and present the way of enhancing the efficiency of maintenance through the method of analyzing the data with D-logger.