Effects of water injection on nitric oxide emission of a single cylinder port injection spark ignition gasoline engine

Jing Lun Li, Ming Hsun Wu, Rong Horng Chen, Ta Hui Lin, Jun Kai Wang

Research output: Contribution to conferencePaperpeer-review

Abstract

The effects of pulsed water injection at the intake port of a modern port fuel injection gasoline engine were investigated. A port water injection system was developed and the water injector was installed on the intake runner of the single cylinder motorcycle engine at a location upstream of the fuel injector. The results show that with a water-gasoline injection ratio of 1, more than 80 % of NOx emission can be removed. The trade-off was a 25 % reduction in torque output at 4000 rpm and 20 % throttle opening; however, the decrease on torque can be controlled to be within 5 % by reducing water-gasoline mass ratios to less than 0.6. We also performed NOx emission modeling using one-dimensional gas dynamics code with extended Zeldovich mechanism, and consistent results were found between numerical prediction and experimental measurements. The port water injection approach appears to be an effective means for reducing NOx emission from a gasoline engine at low speed and high load conditions without largely sacrificing the performances on torque output and unburned hydrocarbon emissions.

Original languageEnglish
Publication statusPublished - 2009
Event7th Asia-Pacific Conference on Combustion, ASPACC 2009 - Taipei, Taiwan
Duration: 2009 May 242009 May 27

Conference

Conference7th Asia-Pacific Conference on Combustion, ASPACC 2009
Country/TerritoryTaiwan
CityTaipei
Period09-05-2409-05-27

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Chemical Engineering(all)

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