Further thermal efficiency increase of the Diesel combustion for commercial engines

For current and prior emission legislations, the focus of the development process was strongly influenced by achieving the limited emissions components like nitrogen oxide (NOx), particulates, etc. In future, the focus will be on improving the thermal efficiency and consequently reducing CO₂ emissions. For the already existing greenhouse gas legislation in the USA as well as the discussed CO₂ regulation in Europe, both measures on the vehicle (aerodynamics, tire rolling resistance, axle efficiency …) as well as measures on the power train will be mandatory to achieve the future limits. As an example: For the second phase of the greenhouse gas engine standards in the US there will be a reduction of up to 6.1% respectively, 5.1% considering same weighting factor in RMC for MY2027 compared to MY2017 required.