【摘要】 为探索大幅度提高汽油机热效率的途径,采用了一种汽油均质混合气柴油引燃(HCII)的燃烧方式,结合发动机性能试验与可视化试验对HCII的燃烧特性进行了初步研究。研究结果表明:HCII燃烧方式的热效率显著高于汽油机,可以达到甚至超过柴油机的水平;在汽柴油质量比大于0.5时可保证无烟燃烧;随汽柴油比的增加,滞燃期增长,着火点位置由中心向周边拓展。更多还原

【Abstract】 In order to improve thermal efficiency of gasoline engines, a new combustion mode named homogeneous charge induced ignition (HCII) was examined. The combustion characteristics of HCII were investigated through combustion visualization and engine performance’s study. The results show that the thermal efficiency of HCII is higher than that of homogeneous charge gasoline engine and reaches the level of diesel engine. Smoke-free combustion can be realised when the gasoline/diesel ratio reaches 0.5. Moreover, the ignition delay increases and the ignition position is found moving from the center towards the periphery of the combustion chamber with the increase of gasoline/diesel ratio.更多还原