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介绍HCCI的基本概念及燃烧的特点,并对目前国内外的研究进展进行分析,指出HCCI方式所面临的主要困难和有待解决的问题,展望HCCI的应用前景. 相似文献
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The experimental investigation of homogeneous charge compression ignition (HCCI) process is carried out on a 4-cylinder diesel engine. One of the cylinders is modified for HCCI combustion with mixed additives. The influence of mixed additives on the HCCI combustion process is investigated. The experimental results indicate that the mixed additives are better than the single additives for HCCI fuel, causing ignition and heat release to be advanced and the peak of heat release rate to increase under the condition of different engine speeds and steady HCCI combustion. Moreover, with the increase in engine speed, the influence of mixed additives on HCCI combustion is more obvious. In addition, the mixed additives are beneficial to improve HCCI engine misfire at a high engine speed and make the engine operate stable. 相似文献
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结合PRF(Primary Reference Fuels)和二叔丁基过氧化物(DTBP)详细的化学反应动力学机理,应用HCCI单区燃烧模型对添加剂二叔丁基过氧化物(DTBP)改善HCCI着火的能力进行了数值模拟,数值模拟结果表明,混有添加剂(DTBP)的基础燃料能够有效地改善HCCI着火,随着DTBP质量分数的增加,着火明显提前,但过多的添加剂不利于发动机正常工作。随着发动机转速提高,添加剂质量分数相应增加,以避免失火。发动机结构与运行参数对HCCI燃烧起到显著影响,提高进气温度、进气压力和压缩比,着火提前;提高发动机转速导致着火滞后。 相似文献
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