The effect of Exhaust Gas Recirculation (EGR) on combustion stability, engine performance and exhaust emissions in a gasoline engine

Jinyoung Cha, Junhong Kwon, Youngjin Cho, Simsoo Park

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The EGR system has been widely used to reduce nitrogen oxides (NOx) emission, to improve fuel economy and suppress knock by using the characteristics of charge dilution. However, as the EGR rate at a given engine operating condition increases, the combustion instability increases. The combustion instability increases cyclic variations resulting in the deterioration of engine performance and emissions. Therefore, the optimum EGR rate should be carefully determined in order to obtain the better engine performance and emissions. An experimental study has been performed to investigate the effects of EGR on combustion stability, engine performance, NOx and the other exhaust emissions from 1. 5 liter gasoline engine. Operating conditions are selected from the test result of the high speed and high acceleration region of SFTP mode which generates more NOx and needs higher engine speed compared to FTP-75 (Federal Test Procedure) mode. Engine power, fuel consumption and exhaust emissions are measured with various EGR rate. Combustion stability is analyzed by examining the variation of indicated mean effective pressure (COV imep) and the timings of maximum pressure (P max) location using pressure sensor. Engine performance is analyzed by investigating engine power and maximum cylinder pressure and brake specific fuel consumption (BSFC).

Original languageEnglish
Pages (from-to)1442-1450
Number of pages9
JournalKSME International Journal
Volume15
Issue number10
Publication statusPublished - 2001 Oct 1

Fingerprint

Exhaust gas recirculation
Gasoline
Engines
Nitrogen oxides
Fuel consumption
Pressure sensors
Fuel economy
Engine cylinders
Brakes
Dilution
Deterioration

Keywords

  • BSFC(Brake Specific Fuel Consumption)
  • COV(Coefficient of Variation)
  • EGR (Exhaust Gas Recirculation)
  • IMEP (Indicated Mean Effective Pressure)
  • SFTP (Supplemental Federal Test Procedure)

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

The effect of Exhaust Gas Recirculation (EGR) on combustion stability, engine performance and exhaust emissions in a gasoline engine. / Cha, Jinyoung; Kwon, Junhong; Cho, Youngjin; Park, Simsoo.

In: KSME International Journal, Vol. 15, No. 10, 01.10.2001, p. 1442-1450.

Research output: Contribution to journalArticle

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