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      https://www.ias.ac.in/article/fulltext/sadh/029/03/0275-0284

    • Keywords

       

      Diesel engine; EGR; NOx; pollution

    • Abstract

       

      In diesel engines, NOx formation is a highly temperature-dependent phenomenon and takes place when the temperature in the combustion chamber exceeds 2000 K. Therefore, in order to reduce NOx emissions in the exhaust, it is necessary to keep peak combustion temperatures under control.

      One simple way of reducing the NOx emission of a diesel engine is by late injection of fuel into the combustion chamber. This technique is effective but increases fuel consumption by 10–15%, which necessitates the use of more effective NOx reduction techniques like exhaust gas recirculation (EGR). Re-circulating part of the exhaust gas helps in reducing NOx, but appreciable paniculate emissions are observed at high loads, hence there is a trade-off between NOx and smoke emission. To get maximum benefit from this trade-off, a paniculate trap may be used to reduce the amount of unburnt particulates in EGR, which in turn reduce the paniculate emission also.

      An experimental investigation was conducted to observe the effect of exhaust gas re-circulation on the exhaust gas temperatures and exhaust opacity. The experimental setup for the proposed experiments was developed on a two-cylinder, direct injection, air-cooled, compression ignition engine. A matrix of experiments was conducted for observing the effect of different quantities of EGR on exhaust gas temperatures and opacity

    • Author Affiliations

       

      Avinash kumar Agrawal1 Shrawan Kumar Singh2 Shailendra Sinha1 Mritunjay Kumar Shukla1

      1. Department of Mechanical Engineering, Indian Institute of Technology, Kanpur - 208 016, India
      2. Environmental Engineering and Management, Indian Institute of Technology, Kanpur - 208 016, India
    • Dates

       
  • Sadhana | News

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