Modeling Three-Way Catalyst Converters during Cold Starts and Potential Improvements

Xieyang Yan, Ryota Sone, Ryoya Inoue, Jin Kusaka, Katunori Umezawa, Yasuhiro Kondo

研究成果: Conference article査読

4 被引用数 (Scopus)


Three-way catalyst (TWC) converters are often used to purify toxic substances contained in exhaust emissions from gasoline engines. However, a large amount of CO, NOx and THC may be emitted before the TWC reaches its light-off temperature during a cold start. In this work, a numerical model was developed for studying the purification performance of a close-coupled TWC converter during the cold start period. The TWC model was built using axisuite, commercial software by Exothermia S.A. Model gas experiments were designed for calibrating the chemical reaction scheme and corresponding reaction rate parameters in the TWC model. The TWC model was able to simulate the purification performance of CO, NOx and THC under both lean and rich air-fuel equivalence ratios (λ) for different conditions. The light-off temperature and oxygen storage capacity (OSC) behavior were also successfully validated in the model. Vehicle tests were conducted on a chassis dynamometer to verify the TWC model. The simulation achieved good agreement with the experimental data during a cold start. Based on the validated model, a parametric analysis was conducted on key parameters to propose an optimized design with improved purification performance for future TWC production.

ジャーナルSAE Technical Papers
出版ステータスPublished - 2019 12月 19
イベント2019 JSAE/SAE Powertrains, Fuels and Lubricants International Meeting, JSAE 2019 - Kyoto, Japan
継続期間: 2019 8月 262019 8月 29

ASJC Scopus subject areas

  • 自動車工学
  • 安全性、リスク、信頼性、品質管理
  • 汚染
  • 産業および生産工学


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