Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Premature Failure Prevention design of Three-way Catalyst Substrate using DOE

실험계획법을 이용한 삼원촉매담체의 조기 파손 예방 설계

  • Lee, Dong-Woo (Department of Mechanical Engineering, Dong-A Univ.) ;
  • Cho, Seok-Swoo (Department of Vehicle Engineering, Kangwon National Univ.)
  • Received : 2010.02.08
  • Accepted : 2010.05.11
  • Published : 2010.07.01
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Abstract

Domestic three-way catalyst satisfies exhaust gas conversion efficiency or pressure drop etc. but doesn't satisfy thermal durability. Thermal stress analysis for three-way catalyst was performed based on experimental temperature distribution. Thermal safety of three-way catalyst was estimated by safety factor. Aspect ratio variable had the most significant effect on thermal stress. Thickness variable had the least significant effect on thermal stress. Optimal conditions for premature failure prevention of three-way catalyst were as follows : (1) aspect ratio of three-way catalyst : 0.6:1 (2) 2.84mm thick (3) silicon nitride. The safety of Taguchi-optimized three-way catalyst were 4.7 times higher than that of existent three-way catalyst.

Keywords

References

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