Remarks are made in the enclosed pdf.

Most importend is to change an efficiency in Fig. 15 that appears larger 1. Here the base must be changed or it must be explicitely explained why it shows this numbers that are technically and per definition not possible.

The authors present a conceptual study on variants of a drive train with hydraulic power split. In my opinion, the following major points deserve a closer look:

- It remains unclear to which extend it goes beyond already existing knowledge in the field (novelty). 

- The abstract should get a major overhaul to represent the context, motivation, and results of the work more to the point.

- While the results of parameters changes to a simulation model are described, the model itself does not have a suitable subsection. ~



Further comments are in the attached manuscript pdf.