The development of nanotechnology makes nanoparticle additives for internal combustion engines possible and the existing research results have shown that the engine performances can be improved with metal-based nanoparticles additive in the fuel. The present study makes an attempt to add aluminium oxide (AL₂O₃) nanoparticles (25, 100 ppm) into diesel-methanol blends, and to study the impact of the nanoparticle additive on the characteristics of a modern DI diesel engine. The results showed that the presence of AL₂O₃ nanoparticles in the diesel-methanol blends improved the peak in-cylinder pressure, heat release rate and brake thermal efficiency by 2.5%, 16.1% and 3.6%, respectively, as compared with those without AL₂O₃ additives, as well as the decreases in the ignition delay and combustion duration by up to 6.9% and 16%. And the brake specific fuel and energy consumption can be reduced by up to 3.7% and 3.5%, respectively. Moreover, engine emission tests showed the suppressions in CO, HC and smoke emissions by up to 83.3%, 40.9% and 69.2%, respectively, but a marginal increase in NO_X emission by 14.4%. These results indicate that the presence of nanoparticle additives in the diesel-methanol blends can achieve sound effects of energy conservation and emission reductions.

纳米技术的发展使得用于内燃机的纳米颗粒添加剂成为可能，现有的研究结果表明，在燃料中使用金属基纳米颗粒添加剂可以改善发动机性能。本研究试图将氧化铝（AL ₂ O ₃）纳米颗粒（25，100 ppm）添加到柴油-甲醇混合物中，并研究纳米颗粒添加剂对现代DI柴油机特性的影响。结果表明，与未添加柴油的情况相比，柴油-甲醇混合物中存在AL ₂ O ₃纳米颗粒可将气缸内峰值压力，放热率和制动热效率分别提高2.5％，16.1％和3.6％。 AL ₂O ₃添加剂，以及点火延迟和燃烧持续时间的减少分别达到6.9％和16％。制动器的燃油和能耗分别可分别降低3.7％和3.5％。此外，发动机排放测试显示，CO，HC和烟气排放分别降低了83.3％，40.9％和69.2％，但NO _X排放仅增加了14.4％。这些结果表明，在柴油-甲醇共混物中存在纳米颗粒添加剂可以实现节能和减排的良好效果。