Vehicular Pollution and environmental degradation are on the rise with increasing vehicles and to stop this strict regulation have been put on vehicular emissions. Also, the depleting fossil fuels are of great concern for energy security. This has motivated the researchers to invest considerable resources in finding cleaner burning, sustainable and renewable fuels. However renewable fuels independently are not sufficient to deal with the problem at hand due to supply constraints. Hence, advanced combustion technologies such as homogeneous charge compression ignition (HCCI), low-temperature combustion (LTC), and dual fuel engines are extensively researched upon. In this context, this work investigates dual fuel mode combustion using a constant speed diesel engine, operated using hydrogen and diesel. The engine is operated at 25, 50 and 75% loads and substitution of diesel energy with hydrogen energy is done as 0, 5, 10 and 20%. The effect of hydrogen energy share (HES) enhancement on engine performance and emissions is investigated. In the tested range, slightly detrimental effect of HES on brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) is observed. Comparision of NO and NO₂ emissions is done to understand the non-thermal influence of H₂ on the NO_x emissions. Hence, HES is found beneficial in reducing harmful emissions at low and mid loads.

随着车辆的增加，车辆污染和环境恶化正在增加，并且为了制止这种严格的规定，对车辆排放物进行了规定。同样，耗尽的化石燃料也非常关注能源安全。这促使研究人员投入大量资源来寻找更清洁的燃烧，可持续和可再生燃料。然而，由于供应的限制，可再生燃料独立地不足以解决眼前的问题。因此，广泛研究了先进的燃烧技术，例如均质充量压缩点火（HCCI），低温燃烧（LTC）和双燃料发动机。在这种情况下，这项工作研究了使用恒速柴油机（使用氢气和柴油）的双燃料模式燃烧。发动机在25时运转，负载为50％和75％，用氢能代替柴油能分别为0％，5％，10％和20％。研究了氢能份额（HES）增强对发动机性能和排放的影响。在测试范围内，观察到HES对制动热效率（BTE）和制动比油耗（BSFC）的有害影响。NO与NO的比较_进行2次排放是为了了解H ₂对NO _x排放的非热影响。因此，发现HES有利于减少中低负荷时的有害排放。