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<p>An experimental investigation to study the impact of exhaust back pressure on the exhaust emissions of a multipoint sequential fuel injection engine has been carried out in the present work. Testing was performed on a Hyundai i10 engine (1200&#xa0;cc, multicylinder, with a maximum speed of 3000&#xa0;rpm). Experiments were performed at various engine speeds to mitigate engine back pressure by introducing fresh air into the exhaust pipe under in order to form vacuum which help to expel the exhaust gases. The emission trends of nitrogen oxides, particulate matter, carbon monoxide, and total hydrocarbons were analysed. The findings demonstrated that brake specific fuel consumption rise at low loads with increased exhaust back pressure, but no notable change in BSFC was observed at high loads. It was noted that carbon monoxide and hydrocarbons emissions decreased by 27.2% and 7.2%, respectively, whereas nitrogen oxides emissions increased by up to 12.5% with the drop in exhaust back pressure. When EBP decreased, hydrocarbon emissions decreased noticeably but not significantly, suggesting that they were less sensitive than carbon monoxide and nitrogen oxide. These results offer useful information for creating more effective exhaust systems that satisfy strict emission regulations by indicating that maximizing exhaust back pressure can increase fuel economy and lower dangerous carbon monoxide and hydrocarbon emissions in gasoline engines.</p>

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Experimental studies on the emission characteristics of multipoint sequential fuel injection engines by reducing back pressure

  • 期刊论文

  • 发表日期：

    2025年11月7日

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  • Chandrakumar Pardhi,
  • Anshul Gangele,
  • Nasir Khan,
  • Sanjay Chhalotre,
  • Brajesh Kumar Ahirwar

摘要

An experimental investigation to study the impact of exhaust back pressure on the exhaust emissions of a multipoint sequential fuel injection engine has been carried out in the present work. Testing was performed on a Hyundai i10 engine (1200 cc, multicylinder, with a maximum speed of 3000 rpm). Experiments were performed at various engine speeds to mitigate engine back pressure by introducing fresh air into the exhaust pipe under in order to form vacuum which help to expel the exhaust gases. The emission trends of nitrogen oxides, particulate matter, carbon monoxide, and total hydrocarbons were analysed. The findings demonstrated that brake specific fuel consumption rise at low loads with increased exhaust back pressure, but no notable change in BSFC was observed at high loads. It was noted that carbon monoxide and hydrocarbons emissions decreased by 27.2% and 7.2%, respectively, whereas nitrogen oxides emissions increased by up to 12.5% with the drop in exhaust back pressure. When EBP decreased, hydrocarbon emissions decreased noticeably but not significantly, suggesting that they were less sensitive than carbon monoxide and nitrogen oxide. These results offer useful information for creating more effective exhaust systems that satisfy strict emission regulations by indicating that maximizing exhaust back pressure can increase fuel economy and lower dangerous carbon monoxide and hydrocarbon emissions in gasoline engines.