Influence of Fuel and Operating Conditions on Combustion Characteristics of a Homogeneous Charge Compression Ignition Engine
Influence of Fuel and Operating Conditions on Combustion Characteristics of a Homogeneous Charge Compression Ignition Engine
复制标题
燃料和工况对均质压燃式发动机燃烧特性的影响
DOI：
10.1021/ef800950c
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发表时间：
2009-02
期刊：
影响因子：
5.3
通讯作者：
Liu Haifeng, Yao Mingfa, Zhang Bo, Zheng Zunqing
中科院分区：
文献类型：
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作者：
Liu Haifeng, Yao Mingfa, Zhang Bo, Zheng Zunqing
在一种改进型四缸直喷柴油机上，通过试验研究了燃料和工况对均质装药压缩点火（HCCI）发动机燃烧过程、负荷范围和尾气排放的影响。实验中使用了六种燃料：两种主要参考燃料（PRF），两种PRF和乙醇的混合物，以及两种商业无铅汽油燃料。这些燃料的辛烷值（RON）均在90以上。研究人员考虑了6种工况，包括不同的进气温度（Tin）、进气压力（pin）和发动机转速(n)。实验结果表明，低销下汽油自燃最早，而高销下PRF最早。也就是说，燃料性质对HCCI燃烧过程的影响取决于操作条件。采用敏感燃料和适当的控制策略有利于扩大负荷范围。对于敏感燃料，需要更高的Tin来延长l…
The effect of fuel and operating conditions on the combustion process, load range, and exhaust emissions of a homogeneous charge compression ignition (HCCI) engine was investigated in a modified four-cylinder direct-injection diesel engine through an experimental study. Six fuels were used during the experiments: two primary reference fuels (PRF), two mixtures of PRF and ethanol, and two commercial unleaded gasoline fuels. All research octane numbers (RON) of these fuels are over 90. Six operating conditions were considered, including different intake temperatures (Tin), intake pressures (pin), and engine speeds (n). Experimental results indicate that autoignition of gasoline is earliest under low pin but the PRF is earliest under high pin. That is, the effect of fuel properties on the HCCI combustion process depends upon the operating conditions. It is beneficial to extend the load range with the sensitive fuels and suitable control strategies. For a sensitive fuel, a higher Tin is needed to extend the l...