Optical diagnostics of the combustion process in a PFI SI boosted engine fueled with butanol–gasoline blend
Optical diagnostics of the combustion process in a PFI SI boosted engine fueled with butanol–gasoline blend
复制标题
DOI：
10.1016/j.energy.2012.03.006
复制
发表时间：
2012-09
期刊：
影响因子：
9
通讯作者：
C. Tornatore;L. Marchitto;G. Valentino;F. E. Corcione;S. Merola
中科院分区：
文献类型：
--
作者：
C. Tornatore;L. Marchitto;G. Valentino;F. E. Corcione;S. Merola
用于火花点火发动机的醇与烃燃料的混合物在给定的发动机排量和压缩比下提高燃料辛烷值和功率。在这项工作中，研究了向汽油中添加丁醇的影响。试验是在一台带有外增压装置的进气道燃油喷射单缸汽油机上进行的。光学可访问的发动机配备了商业SI涡轮增压发动机的头部，具有相同的几何规格。采用循环分辨可视化技术研究了40%正丁醇掺混60%纯汽油（BU40）对火花点火燃烧过程的影响。发动机工作在低速，中等增压和WOT。考虑了火花正时和喷油相位的变化。火焰光度和燃烧压力的数据进行了比较。在关闭（CV）和打开进气门（OV）时喷射燃料。丁醇混合物允许在更先进的点火正时工作，而不会发生异常燃烧。对于共混物BU40，增加注射持续时间（DOI）以获得化学计量混合物。BU40的性能水平与汽油相似，并且在开阀喷射中允许最小化异常燃烧效应，包括超细碳质颗粒、NOx和HC的排放。
Alcohol blends with hydrocarbon fuels for spark-ignition engine increase fuel octane rating and power for a given engine displacement and compression ratio. In this work, the influence of butanol addition to gasoline was investigated. The experiments were performed in a ported fuel injection single cylinder SI engine with an external boosting device. The optically accessible engine was equipped with the head of a commercial SI turbocharged engine with the same geometrical specifications. The effect on the spark ignition combustion process of 40% of n-butanol blended in volume with 60% pure gasoline (BU40) was investigated by cycle resolved visualization. The engine worked at low speed, medium boosting and WOT. Changes in the spark timing and fuel injection phasing were considered. Comparisons between flame luminosity and combustion pressure data were performed. The fuel was injected at closed (CV) and open intake valves (OV). Butanol blend allowed working in more advanced spark timing without occurrence of abnormal combustion. For the blend BU40, the duration of injection (DOI) was increased to obtain a stoichiometric mixture. BU40 granted performance levels similar to gasoline and in open valve injection allowed to minimize the abnormal combustion effects including the emission of ultrafine carbonaceous particles, NOx and HC.