Investigation into Light Duty Dieseline Fuelled Partially-Premixed Compression Ignition Engine
Investigation into Light Duty Dieseline Fuelled Partially-Premixed Compression Ignition Engine
复制标题
DOI：
10.4271/2011-01-1411
复制
发表时间：
2011-01-01
影响因子：
1.2
通讯作者：
Kalghatgi, Gautam
中科院分区：
文献类型：
--
作者：
Zhang, Fan;Xu, Hongming;Kalghatgi, Gautam
传统的柴油机部分预混压缩点火（PPCI）发动机已经得到了许多研究者的研究。然而，柴油的易燃性和汽化性使其不适合PPCI燃烧。本研究将柴油（柴油与汽油的混合）作为部分预混压缩点火燃料进行研究，因为它结合了两种燃料特性，增加点火延迟的特性和更高的挥发性，比纯柴油更适合PPCI燃烧。在欧IV轻型共轨柴油发动机上进行了一系列测试，测试了从低速/负载到中速/负载的不同发动机模式，在这些模式下，燃料混合比、EGR速率、喷射正时和数量都发生了变化。对柴油机PPCI燃烧的排放、油耗和燃烧稳定性进行了研究。结果表明，柴油作为PPCI燃烧燃料在减排方面具有很大的优势。这在高速发动机模式下尤为显著。同时发现，在柴油中加入50%的汽油后，在所有测试负荷下，颗粒数总浓度可降低90%，同时保持较低的氮氧化物水平和较高的制动燃料转换效率（约30%）。
Conventional diesel fuelled Partially-Premixed Compression Ignition (PPCI) engines have been investigated by many researchers previously. However, the ease of ignition and difficulty of vaporization of diesel fuel make it imperfect for PPCI combustion.In this study, Dieseline (blending of diesel and gasoline) was looked into as the Partially-Premixed Compression Ignition fuel for its combination of two fuel properties, ignition-delay-increasing characteristics and higher volatility, which make it more suitable for PPCI combustion compared to neat diesel. A series of tests were carried out on a Euro IV light-duty common-rail diesel engine, and different engine modes, from low speed/load to middle speed/load were all tested, under which fuel blend ratios, EGR rates, injection timings and quantities were varied. The emissions, fuel consumption and combustion stability of this dieseline-fuelled PPCI combustion were all investigated. The results showed that dieseline had great advantages as a PPCI combustion fuel in terms of emission reduction. This was particularly significant at high-speed engine mode. It was also found that with a blend of 50% gasoline in diesel, the particle numbers total concentration could be reduced by 90% while low NOx level and high brake fuel conversion efficiency (around 30%) were maintained at all the loads tested.