Application of Alcohol Fumigation to Diesel Tractor Engine. (Part 3). Analysis of Combustion for a Multicylinder Engine with Dual-fuel.

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  • アルコール・軽油二燃料噴射式機関の農用トラクタへの応用に関する研究　（第３報）　多気筒機関における燃焼状態の解析
  • アルコール ケイユ 2 ネンリョウ フンシャシキ キカン ノ ノウヨウ トラク
  • Analysis of Combustion for a Multicylinder Engine with Dual-fuel
  • 多先気筒機関における燃焼状態の解析

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Abstract

In order to ensure the stable operation of a dual-fuel engine with alcohol, the combustion process and the control system of a dual-fueled tractor engine were evaluated by measuring the cylinder pressures. Compared to the operation with diesel fuel alone, the mean of the maximum combustion pressures increased by 9.5 percent, and the standard deviation of them amounted to 5.7 times with dual-fuel operation. The spectral analysis for the fluctuant components of the maximum combustion pressures was carried out. It became clear that the frequency range of the strongest combustion fluctuation was below 0.2 Cycle/Cycle that was a relative long cycle. It was also concluded that the cause of the combustion fluctuation in this range was the ill-suited control of alcohol flow rate. This problem was able to be solved by adopting the appropriate parameters for a control of alcohol flow rate.

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