预混压燃发动机的现状与未来(英文)

Present and Future of Premixed Compression Ignition Engines

均质压燃(HCCI)的概念已被延伸到了更广的含义,越来越多与之相关的研究对象是其衍生出来的概念如非均质预混压燃(PPCI)并采用多种燃料的多次喷射技术。未来的柴油机和汽油机的结构设计(例如压缩比)逐渐接近,采用非均质预混压燃使得氮氧化物和颗粒排放物同时减少,而且可以一机使用多种燃料,特别是柴油和汽油类燃料可以离线或在线混合喷入缸内。目前增压内燃机压缩比逐渐降低的趋势可能在采用新的燃烧模式后会反向发展,以高压缩比和无节气门运行的预混压燃模式并结合增压技术是今后发动机提高热效率的主要途径之一。

Homogeneous Charge Compression Ignition （HCCI） was perhaps the most attractive topic during the last decade for engine combustion researchers so was subsequently investigated more intensively than other engine technologies. Its application has stagnated at the present but its derivatives such as partially premixed compression ignition （PPCI） still remain as promising alternatives to the conventional combustion systems. This paper presents an overview of the research on HCCI and its derivatives and it also provides a future outlook of the next generation of new combustion systems in relation to the concept of premixed compression ignition. It is believed that multiple injections of multiple fuels using even higher compression ratios combined with boosting will be the way forwards for high efficiency engines and this development trend will likely lead to merging of diesel and gasoline engine technologies using premixed compression ignition.