吉林大学学报(工学版) ›› 2010, Vol. 40 ›› Issue (04): 942-0946.

• paper • Previous Articles     Next Articles

Application of EGR |and excess air ratio combined NOx emission control strategy on natural gas engine

YANG Li-ping1,MA Xiu-zhen1,LI Jun2,WANG Li-yuan3   

  1. 1.College of Power and Energy Engineering, Harbin Engineering University|Harbin 150001|China；2.College of Automotive Engineering, Jilin University, Changchun 130022, China;3.College of Science,Harbin Engineering University,Harbin 150001,China
  • Received:2009-03-08 Online:2010-07-01 Published:2010-07-01

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Abstract:

The effects of exhaust gas recirculation(EGR) and excess air ratio(a) on engine performance were investigated experimentally on a modified turbocharged and intercooled spark-ignition natural gas engine. The results show that the lean mixture combustion combined with EGR resulted in higher thermal efficiency than that only using lean combustion strategy at the same NOx emission target. Therefore, an EGR and a combined NOx  emission control strategy was proposed. The NOx  emission control domains at engine speed 2800 min/r,75% and 50% loads were deterrnied in which the NOx  emission kept below 1 g·(kW·h)-1 without need for exhaust gas after treatment and serious penalty on fuel economy.

Key words: power machinery and engineering, natural gas engine, exhaust gas recirculation, lean burn, emission

CLC Number: 

  • TK46
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