Dual-mode dual-fuel (DMDF) combustion strategy has been corroborated to be a potential combustion mode to achieve ultra-low NOx and soot emissions, as requested by the future regulations on internal combustion engines. In addition, the synthetic fuels have arisen in the last years for overcoming the problem of total emissions of CO₂ over the fuel life cycle. In the case of DMDF, poly-oxymethylene dimethyl ether (OMEx) has been found a promising alternative to diesel when combined to gasoline. In this sense, the OMEx-gasoline combination promotes ultra-low NOx and zero-soot emissions while maintaining the engine performance and acceptable levels of other regulated emissions. The main objective and novelty of this work is to experimentally evaluate the potential of this architecture to reach post-EURO VI NOx emissions levels at engine-out conditions by means of a dedicated engine calibration. Moreover, to evaluate the implications of using synthetic fuels for the European objectives in terms of CO₂ impact considering different driving conditions scenarios by means of a virtual vehicle model. The results show that the OMEx-gasoline DMDF engine can reach engine-out NOx emissions below 0.2 g/kWh with zero-soot emissions in all engine operating map and the impact on fuel consumption is lower than 4% with respect to conventional diesel operation. Also, the H2030 target of 30% CO₂ reduction can be achieved in a well-to-wheel base.

根据内燃机未来法规的要求，已经证实双模式双燃料（DMDF）燃烧策略是实现超低NOx和烟尘排放的潜在燃烧模式。另外，过去几年中出现了合成燃料，以克服CO ₂总排放量的问题。在燃油寿命周期内。就DMDF而言，已发现聚甲醛二甲醚（OMEx）当与汽油结合时可作为柴油的替代品。从这个意义上讲，OMEx与汽油的结合可促进超低NOx和零烟尘排放，同时保持发动机性能和其他规定排放的可接受水平。这项工作的主要目的和新颖性是，通过专门的发动机校准，通过实验评估该架构在发动机熄火条件下达到后EURO VI NOx排放水平的潜力。此外，就CO ₂而言，评估使用合成燃料对欧洲目标的影响通过虚拟车辆模型考虑不同驾驶条件场景的影响。结果表明，OMEx汽油DMDF发动机在所有发动机运行图中均可实现低于0.2 g / kWh的发动机输出NOx排放，且烟灰排放为零，并且相对于传统柴油运行，其对燃油消耗的影响低于4％。同样，可以在轮距良好的基础上实现H2030降低30％CO _2的目标。