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Effect of Lean and Rich Mixture Operating Time on NOx Emission from Lean Burn Gasoline Engine with AdsorberReduction Catalytic Converter

SUN Zhijun1， LI Zhijun2， HONG Wei1， LIU Shuliang2   

  1. 1.College of Automotive Engineering, Jilin University， Changchun 130022， China; 2.College of Mechanical Engineering, Tianjin University， Tianjin 300072 ，China
  • Received:2004-11-17 Revised:2005-01-20 Online:2005-07-01 Published:2005-07-01
  • Contact: LIU Shuliang

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Abstract: The NOx emission from the lean burn gasoline engine may be reduced by the adsorberreduction catalytic converter. The effects of the lean and the rich mixture operating time duration tlean and trich as well as their ratio tlean/trich on the NOx emission and the fuel economy of a lean burn gasoline engine were investigated experimentally. The results show that with the decrease of the time ratio tlean/trich the CO and HC emissions and BSFC increase， but the NOx emission decreases. The increase of the time duration tleanand trich under constant ratio tlean/trich leads to decrease of BSFC and increase of NOx emission. Reducing the tleanand trich can improve the NOx emission from the engine with increased load.

Key words: power machinery engineering, lean burn gasoline engine, adsorberreduction catalytic converter, NOx emission

CLC Number: 

  • TK411.25
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