Diesel engines show better thermal efficiency and fuel consumption, but diesel engines typically generate more NOx emissions because of lean-burn conditions. Therefore, it is necessary to reduce the emissions of diesel engines either by efficiently controlling combustion or by employing exhaust gas after-treatment systems. In this study several problems we're observed in a SCR system and Engine control system. The analysis result, new technology SCR is suitable for the vehicle with low temperature operating condition. Through this analysis we can find out more effective repair factors from the various fault in SCR component.

• 모준범(Dept. of Automobile Management Graduate school, Joongbu Universitry) | Jun-Bum Mo
• 정태훈(Member, Dept. of Automobile Management, Joongbu Universitry) | Tae-Hoon Chung Corresponding Author