Improvement of Combustion Fluctuation by Using Estimation Method of Residual Gas Ratio in Cylinder of Gasoline Engine
Improvement of Combustion Fluctuation by Using Estimation Method of Residual Gas Ratio in Cylinder of Gasoline Engine
复制标题
汽油机缸内残气率估算方法改善燃烧波动
DOI：
10.11368/tse.24.11
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
鈴木隆
中科院分区：
文献类型：
--
作者：
一柳満久;鈴木隆
汽油机一直要求提高热效率和降低污染物排放，以往的研究主要是通过控制点火提前角和保持恒定空燃比来实现的。为了进一步提高热效率，期望减少由于每个循环的燃烧引起的压力波动，这导致产生稳定的燃烧场并改善燃料消耗。由于燃烧引起的压力波动受缸内残余气体比例的影响很大，因此本研究提出了利用燃烧压力来估计残余气体比例的方法，残余气体比例被定义为进入缸内的残余气体和空气-燃料混合物的质量比，并提出了通过控制点火正时来减小考虑残余气体比例的压力波动的方法。在大残气率的实验条件下，发现采用本文提出的方法，平均指示压力的波动减小到20%以上。
Gasoline engines have been required to improve the thermal efficiency and reduce the pollutant emission, and the previous studies were developed by controlling the ignition timing and keeping the constant air-fuel ratio. For further improvement of the thermal efficiency, it is expected to reduce the pressure fluctuations due to the combustion per cycle, which causes to generate the stable combustion field and improve the fuel consumption. Since the pressure fluctuations due to the combustion are significantly affected by the ratio of the residual gas in the cylinder, the present study proposed the method to estimate the ratio of the residual gas, which is defined as the mass ratio of the residual gas and the air-fuel mixture into the cylinder, by using the combustion pressure, and developed the methods to reduce the pressure fluctuations considering the ratio of the residual gas by controlling the ignition timing. Under the experimental condition of the large ratio of the residual gas, it was found that the fluctuations of the indicated mean effective pressure was reduced to more than 20% by using the developed methods.