THC Reduction through the Improvement of Exhaust System

배기계 형상 개선을 통한 THC 저감에 관한 연구

  • 김기성 (여수대학교 기계공학과) ;
  • 이용호 (여수공업대학 기계설계학과)
  • Published : 2000.09.01

Abstract

Experimental studies were performed to understand the flow characteristics in the exhaust system and improve the THC emission characteristics by optimizing the flow in the exhaust manifold and CCC in a SI engine. For this purpose, the flow characteristics in the exhaust systems with two types of exhaust manifolds(STD and New Type) were measured by using LDV technique under various engine condition. It was found that the flow characteristics in the New Type exhaust manifold was more desirable in a view point of heat loss reduction from the exhaust gases. The vehicle emission tests showed that the THC emission in the New Type exhaust manifold was decreased by 12%.

Keywords

References

  1. Experimental and Predictive Investigation of a Close Coupled Catalyst Converter with Pulsating Flow Bressler, H.;Rammoser, H.;Neumaier, H.;Terres, F.
  2. CFD Investigation of the 3-D Unsteady Flow in Catalytic Converter Jeong, S.;Kim, T.
  3. Development of the Ultra Low Heat Capacity and Highly Insulating(ULOC) Ex. Manifold for ULEV Kishi, H.;Hashimoto, H.;Ishii, K.;Komatsuda, T.
  4. Effect of Flow Distribution on Emissions Performance of Catalytic Converters Martin, A.P.;Bordet;Mouton, X.
  5. Optimization of Catalytic Converter Gas Flow Distribution by CFD Prediction Welten, H.;Bressler, H.;Terres, F.;Neumaier, H.;Rammoser, D.
  6. Transient Flow Characteristics Inside the Catalytic Converter of a Firing Gasoline Engine Zhao, F.Q.;Bai, L.;Liu, Y.;Chue, T.H.;Lai, M.C.