Gaseous and particulate matter emissions of biofuel blends in dual-injection compared to direct-injection and port injection
Gaseous and particulate matter emissions of biofuel blends in dual-injection compared to direct-injection and port injection
复制标题
与直喷和端口喷射相比，双喷射生物燃料混合物的气体和颗粒物排放
DOI：
10.1016/j.apenergy.2012.11.020
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发表时间：
2013
期刊：
影响因子：
11.2
通讯作者：
Daniel R
中科院分区：
文献类型：
--
作者：
Daniel R
为了满足燃料安全的需求和应对日益增长的二氧化碳排放担忧，汽车行业正在通过生物燃料寻求解决方案。传统上，当向燃烧室提供生物燃料混合物时，混合物在喷射到一个位置之前先从外部混合。此位置发生在气缸之前(喷口燃油喷射，PFI)，或直接进入气缸(直接喷射，DI)。然而，双喷射的使用允许在气缸内以任何混合比例混合两种燃料，当组合两个位置(PFI和DI)时。这种喷射策略提供了更大的灵活性，因为混合比例可以根据发动机速度和负载需求以及燃料供应而即时改变。作者以前的工作已经报道了一种新的生物燃料候选：2，5-二甲基呋喃(DMF)的25%混合燃料(在汽油中)双喷改善了燃烧性能。目前的研究将分析范围扩展到包括不同DMF混合物(25%、50%和75%)从3.5bar到8.5bar IMEP的气体排放，以及在选定的5.5bar IMEP的选定条件下类似馏分乙醇混合物的颗粒物(PM)排放。与直喷相比，双喷提供了更低的CO和CO2排放以及类似的HC排放。与DI相比，PM的平均直径减小，积累模粒子可以忽略不计。然而，更高的燃烧压力意味着NOx的增加，这是由于减少了充气冷却。
To meet the needs of fuel security and combat the growing concerns of CO2emissions, the automotive industry is seeking solutions through biofuels. Traditionally, when supplying biofuel blends to the combustion chamber, the blend is mixed externally prior to its injection in one location. This location occurs either before the cylinder (port-fuel injection, PFI), or directly into the cylinder (direct-injection, DI). However, the use of dual-injection allows the in-cylinder blending of two fuels at any blend ratio, when combining the two locations (PFI and DI). This injection strategy offers increased flexibility as the blend ratio can be changed instantaneously according to engine speed and load demand and fuel availability. Previous work by the authors has reported the improved combustion performance of dual-injection with 25% blends (in gasoline) of a new biofuel candidate: 2,5-dimethylfuran (DMF). This current investigation extends the analysis to include the gaseous emissions of various DMF blends (25%, 50% and 75%) from 3.5bar to 8.5bar IMEP and the particulate matter (PM) emissions of similar fraction ethanol blends at a selected condition of 5.5bar IMEP. Compared to DI, dual-injection offers reduced CO and CO2emissions and comparable HC emissions. The mean PM diameter is decreased and the accumulation mode particles are negligible compared to DI. However, the implication of the higher combustion pressures is an increase in NOxdue to reduced charge-cooling.
影响因子：
1
作者：
Ritchie Daniel;Chongming Wang;Hongming Xu;G. Tian
通讯作者：
Ritchie Daniel;Chongming Wang;Hongming Xu;G. Tian
影响因子：
1
作者：
Matthias Thewes;Martin Müther;Adrien Brassat;S. Pischinger;A. Sehr
通讯作者：
Matthias Thewes;Martin Müther;Adrien Brassat;S. Pischinger;A. Sehr
影响因子：
11.2
作者：
Ritchie Daniel;Hongming Xu;Chongming Wang;D. Richardson;S. Shuai
通讯作者：
Ritchie Daniel;Hongming Xu;Chongming Wang;D. Richardson;S. Shuai