Experimental study of the influence of λ and intake temperature on combustion characteristics in an HCCI engine fueled with n-heptane
Experimental study of the influence of λ and intake temperature on combustion characteristics in an HCCI engine fueled with n-heptane
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DOI：
10.1016/j.joei.2014.03.002
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发表时间：
2014-05-01
影响因子：
5.7
通讯作者：
Wang, J.
中科院分区：
文献类型：
--
作者：
Zhang, C. -H.;Xue, L.;Wang, J.
以正庚烷为燃料，在改进型发动机上实验研究了均质装药压缩点火（HCCI）燃烧模式下的燃烧特性。分析了进气温度和A对化学反应的影响。得到了随进气温度和a的变化而变化的缸内压力、温度、放热速率和点火正时曲线。结果表明，正庚烷的燃烧对进气温度比a更敏感，原因是进气温度对氧化过程的影响比a的影响更深远，进气温度的升高可以延长a的范围，且存在一个与λ值对应的最佳进气温度。(c) 2014年能源研究所。Elsevier Ltd.出版。版权所有。
Combustion characteristics fueled with n-heptane were investigated experimentally in a retrofitted engine to realize homogeneous charge compression ignition (HCCI) combustion mode. The influence of intake temperature and A on chemical reactions was analyzed. In-cylinder pressure temperature heat release rate and ignition timing profiles were obtained with variations of the intake temperature and A. The oxidation process was divided into three phases and the main reactions were analyzed. The results show that the combustion of n-heptane is more sensitive to intake temperature than to A. The reason is that the intake temperature has a more profound effect on the oxidation process than the effect of A. Moreover the increase of intake temperature can extend the range of A and an optimal intake temperature exists corresponding to the value of lambda. (c) 2014 Energy Institute. Published by Elsevier Ltd. All rights reserved.