Influence of Two-Stage Fuel Injection Timing for Combustion and Emissions under Different Engine Loads in a Direct Injection Diesel Engine

Fil H. E., Akansu S. O.

16th INTERNATIONAL COMBUSTION SYMPOSIUM (INCOS 2022), Aydın, Türkiye, 8 - 11 Eylül 2022, cilt.1, sa.1, ss.313-314

  • Yayın Türü: Bildiri / Özet Bildiri
  • Cilt numarası: 1
  • Basıldığı Şehir: Aydın
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.313-314
  • Erciyes Üniversitesi Adresli: Evet

Özet

Population growth and the development of the world economy increase the demand for oil. This situation has led scientists to search for alternative fuels and new combustion technologies that reduce emissions. In this study, the effect of a two-stage injection system on engine performance and emissions was investigated.  Experiments were carried out in a diesel engine with two cylinders, four strokes, and an injection system converted from a mechanical to a common rail type system. In the experiments, pure diesel fuel was used at three different loads (0%, 25%, and 50%) conditions and different first and second injection advances. Experimental results showed that the thermal efficiency was highest when the second injection advance was 351 CAD at all load conditions. It has been shown that CO emissions increase from 335 CAD, where the second injection time starts, to the last injection advance. While there is no significant change in HC emissions at 20 Nm load, but there is uncertainty at 10 Nm load. On the other hand, NO emissions decrease significantly as the second injection time closes to the TDC.