Motivation:
In the wake of the dieselgate, particulate and NOx emissions from diesel engines have increasingly become the focus of public attention. For commercial vehicles and in particular for mobile machines, which use diesel engines almost exclusively as a drive source, the issue of reducing emissions is and will be a major part of drive-side development, also with regard to future exhaust and emission regulations.

The PhlegVKM project is dedicated to reducing emissions in order to take account of emissions regulations and thus the environmental impact of diesel engines. Preliminary investigations have shown that NOx and particulate emissions are particularly high for short periods in the area of sudden load jumps, i.e. in transient operation.

The emissions from transient operating states are therefore to be reduced as part of the PhlegVKM project by phlegmatizing the combustion engine.

Project goals:
To counteract the reduced engine dynamics due to phlegmatization, a hybrid module is integrated into the powertrain. This hybrid module does not work electrically, as is usual in the automotive industry, but hydraulically, as most mobile machines already have a hydraulic system for the drive and/or work drive.

The simulative investigations are intended to take various operating strategies into account and lead to a generally valid design system. To this end, the hybrid module is dimensioned and the relationship between the size of the hybrid module and the effects on raw emissions is established. The economic efficiency of the hybrid solution will also be examined.

The drive system developed in the project should ultimately be able to cover the dynamic load requirements of the system with the hybrid module and at the same time operate the combustion engine in a phlegmatized manner. This will enable a significant reduction in raw emissions from the combustion engine while maintaining the same machine dynamics.