The Effects of cooled and hot EGR(exhaust gas recirculation) on the characteristics of smoke and NOx emission have been investigated using a single cylinder, water-cooled, four cycle, DI diesel engine at several loads and speeds. In this study, a manually controlled EGR system was installed on a agricultural diesel engine which was operated at various operating system. And, the effects of hot EGR and cooled EGR on smoke and NOx emission were compared. The results showed that cooled EGR method was more effective than hot EGR method on smoke and NOx emission.

Abstract
 1. 서론
 2. 실험 장치 및 방법
 3. 실험결과 및 고찰
 4. 결론
 참고문헌

• 문학훈(오산대학 자동차기계계열) | H. H. MOON
• 이상근(한국폴리텍대학 익산캠퍼스 산업설비과) | S. G. LEE