Influence of fuel type, dilution and equivalence ratio on the emission reduction from the auto-ignition in an Homogeneous Charge Compression Ignition engine
Influence of fuel type, dilution and equivalence ratio on the emission reduction from the auto-ignition in an Homogeneous Charge Compression Ignition engine
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DOI：
10.1016/j.energy.2010.01.002
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发表时间：
2010-04
期刊：
影响因子：
9
通讯作者：
H. Machrafi;S. Cavadias;J. Amouroux
中科院分区：
文献类型：
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作者：
H. Machrafi;S. Cavadias;J. Amouroux
均质充量压缩点火（HCCI）是一种有望减少汽车污染的技术。这项技术仍然面临着自动点火和排放控制的问题。本文重点介绍了排放问题，因为它是义不容辞的实现污染少的发动机。为此，本文介绍了有关的CO，NOx，CO2，O2和碳氢化合物的排放测量结果。使用HCCI条件，其中当量比在0.26和0.54之间，入口温度为70°C和120°C，压缩比为10.2和13.5，使用不同的燃料类型：汽油、汽油替代物、柴油、柴油替代物和正庚烷/甲苯的混合物。稀释的影响被认为是汽油，而当量比的影响被认为是所有的燃料。没有测量到大量的NOx。结果表明，降低燃料中甲苯含量和稀释度可以降低CO、O2和碳氢化合物的排放。二氧化碳的情况正好相反。碳氢化合物排放的减少似乎与CO2排放的减少竞争。当自动点火时，柴油似乎比汽油产生更少的CO和碳氢化合物。本文介绍了一个减排控制的例子。
One technology that seems to be promising for automobile pollution reduction is the Homogeneous Charge Compression Ignition (HCCI). This technology still faces auto-ignition and emission-control problems. This paper focuses on the emission problem, since it is incumbent to realize engines that pollute less. For this purpose, this paper presents results concerning the measurement of the emissions of CO, NOx, CO2, O2and hydrocarbons. HCCI conditions are used, with equivalence ratios between 0.26 and 0.54, inlet temperatures of 70°C and 120°C and compression ratios of 10.2 and 13.5, with different fuel types: gasoline, gasoline surrogate, diesel, diesel surrogate and mixtures of n-heptane/toluene. The effect of dilution is considered for gasoline, while the effect of the equivalence ratio is considered for all the fuels. No significant amount of NOxhas been measured. It appeared that the CO, O2and hydrocarbon emissions were reduced by decreasing the toluene content of the fuel and by decreasing the dilution. The opposite holds for CO2. The reduction of the hydrocarbon emission appears to compete with the reduction of the CO2emission. Diesel seemed to produce less CO and hydrocarbons than gasoline when auto-ignited. An example of emission reduction control is presented in this paper.