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<p>The present experimental study aims to analyze the combustion, performance, and exhaust emissions of a single-cylinder 3.7&#xa0;kW multi-fuel variable compression ratio (MFVCR) diesel engine using a practical and affordable combination of <i>Guizotia abyssinica</i> (L.) biodiesel (GAB) and diesel fuel. Various proportions of biodiesel (10%, 20%, and 30% by volume) are blended with diesel fuel. The tests are conducted under different engine loads and compression ratios, while maintaining constant the engine speed at 1500&#xa0;rpm. The performed combustion experiments demonstrate that, on average, the blended fuel (B10, B20, and B30) yields a brake thermal efficiency (BTE) that is almost equivalent to diesel fuel, with a marginal difference of 2.01%. Biodiesel blends have higher fuel consumption of 6.83% higher than that of diesel, mostly because of their elevated density and kinematic viscosity. Furthermore, the use of a GAB system is well acclaimed for its capacity to diminish exhaust emissions in comparison with diesel fuel. More precisely, there has been a substantial reduction of 12.67% in carbon monoxide (CO) and 24.72% in particulate matter (PM) emission. However, there is a slight increase in nitrogen oxide (NO<sub>x</sub>) emissions, specifically an increase of 8.36%, when the engine is running at full capacity using GAB mixtures as fuel. The conducted cost study confirmed the economic feasibility of the GA biodiesel.</p>

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Impact of Guizotia abyssinica (L.) biodiesel on performance and emission of a compression ignition engine

  • 期刊论文

  • 发表日期：

    2025年9月5日

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  • MS Abishek,
  • Sabindra Kachhap,
  • Tikendra Nath Verma

摘要

The present experimental study aims to analyze the combustion, performance, and exhaust emissions of a single-cylinder 3.7 kW multi-fuel variable compression ratio (MFVCR) diesel engine using a practical and affordable combination of Guizotia abyssinica (L.) biodiesel (GAB) and diesel fuel. Various proportions of biodiesel (10%, 20%, and 30% by volume) are blended with diesel fuel. The tests are conducted under different engine loads and compression ratios, while maintaining constant the engine speed at 1500 rpm. The performed combustion experiments demonstrate that, on average, the blended fuel (B10, B20, and B30) yields a brake thermal efficiency (BTE) that is almost equivalent to diesel fuel, with a marginal difference of 2.01%. Biodiesel blends have higher fuel consumption of 6.83% higher than that of diesel, mostly because of their elevated density and kinematic viscosity. Furthermore, the use of a GAB system is well acclaimed for its capacity to diminish exhaust emissions in comparison with diesel fuel. More precisely, there has been a substantial reduction of 12.67% in carbon monoxide (CO) and 24.72% in particulate matter (PM) emission. However, there is a slight increase in nitrogen oxide (NOx) emissions, specifically an increase of 8.36%, when the engine is running at full capacity using GAB mixtures as fuel. The conducted cost study confirmed the economic feasibility of the GA biodiesel.