Shi Jinhong, Wang Tie, Yuwen Haonan, Wang Haoya, Ji Guanzuo
College of Vehicle Engineering, Taiyuan University of Technology No. 79 West Street Yingze, Wan-Bo-Lin Zone, Taiyuan, Shanxi 030024, China.
ACS Omega. 2021 Oct 11;6(42):27620-27629. doi: 10.1021/acsomega.1c01748. eCollection 2021 Oct 26.
Alternative fuels have attracted wide attention owing to the increasing energy consumption and environmental pollution problems, which are caused by the extensive application of diesel engines for various occasions. The Fischer-Tropsch (F-T) diesel synthesized from coal is considered as one kind of ideal alternative fuel for diesel engines; however, its combustion and exhaust emission characteristics are different from those of national diesel owing to its special fuel properties. Therefore, the combustion and emission characteristics of F-T diesel and 0# diesel, which meet the China stage VI were compared in a common rail direct injection (CRDI) diesel engine. Moreover, energy-saving and pollution-reduction potential were analyzed in one CRDI diesel engine fueled with F-T diesel. The results showed that F-T diesel had an earlier ignition point, shorter ignition delay, lower cylinder pressure, and heat release rate compared with those of 0# diesel at the same operating conditions. Meanwhile, the amplitude, oscillation level, and energy of cylinder pressure were decreased to some extent, with the maximum drops of 0.98 bar, 16.4 dB, and 1.01 × 10 Pa, respectively. Additionally, under external characteristic conditions, maximum break thermal efficiency (BTE) and break-specific fuel consumption (BSFC) of F-T diesel were reduced by 1.1 and 2.1% on average compared with those of 0# diesel. In addition, CO, HC, NOx, and SOOT emissions of F-T diesel were found to be lower than those of 0# diesel, which were decreased by an average of 8, 3.7, 2.1, and 1.3%, respectively.
由于柴油发动机在各种场合的广泛应用导致能源消耗增加和环境污染问题，替代燃料已引起广泛关注。由煤合成的费托（F-T）柴油被认为是柴油发动机的一种理想替代燃料；然而，由于其特殊的燃料特性，其燃烧和排放特性与国标柴油不同。因此，在一台共轨直喷（CRDI）柴油发动机中比较了符合中国国六标准的F-T柴油和0#柴油的燃烧和排放特性。此外，还分析了一台使用F-T柴油的CRDI柴油发动机的节能减排潜力。结果表明，在相同工况下，与0#柴油相比，F-T柴油的着火点更早、着火延迟更短、气缸压力和放热率更低。同时，气缸压力的幅值、振荡水平和能量在一定程度上有所降低，最大降幅分别为0.98 bar、16.4 dB和1.01×10 Pa。此外，在外部特性条件下，F-T柴油的最大制动热效率（BTE）和制动比油耗（BSFC）与0#柴油相比平均分别降低了1.1%和2.1%。另外，发现F-T柴油的CO、HC、NOx和碳烟排放低于0#柴油，分别平均降低了8%、3.7%、2.1%和1.3%。
