CAJ | 학술논문

本文中对一重型柴油机瞬态工况下的NOx 与碳烟排放和引入EGR技术的影响进行试验研究。结果表明,引入EGR后,NOx 的瞬态排放有所改善；但碳烟的瞬态排放恶化；关闭EGR阀可缓解碳烟瞬态排放的恶化。通过直流电机EGR阀关闭阶跃试验,揭示了EGR阀的关闭对发动机各项性能的影响规律,为重型柴油机瞬态排放的EGR控制提供了依据。
본문중대일중형시유궤순태공황하적NOx 여탄연배방화인입EGR기술적영향진행시험연구。결과표명,인입EGR후,NOx 적순태배방유소개선；단탄연적순태배방악화；관폐EGR벌가완해탄연순태배방적악화。통과직류전궤EGR벌관폐계약시험,게시료EGR벌적관폐대발동궤각항성능적영향규률,위중형시유궤순태배방적EGR공제제공료의거。
In this paper, an experimental study is conducted on the transient emissions of NOx and soot of a heavy-duty diesel engine and the effects of exhaust gas recirculation ( EGR) . The results show that after the intro-duction of EGR, the transient emission of NOx improves while that of soot deteriorates, and the close of EGR can mitigate the deterioration of transient soot emission. Then a step closing test of EGR valve controlled by a DC motor is performed to reveal the effects of EGR valve closing on the performances of engine, providing a base for the EGR control for the transient emission of heavy-duty diesel engine.