*Energies* **2019**, *12*, 2792


Subsequent works will focus on comparing the performance of this strategy (using the load-following for the fuel regulator and the air optimization) with other strategies (for example, with the strategy which considers the fuel optimization and the load-following mode for the air regulator). But first, a sensitivity analysis for both *fd* and *ke*ff parameters will be performed for the new strategies, to validate the recommended values of 100 Hz and 20 lpm/W obtained in this study.

Experimental tests have been performed for the first strategies (such as [3,4]) proposed in the research grant mentioned in the Acknowledgments section, but these will continue for recently proposed advanced strategies [14,45–47], including the strategy detailed in this paper.

**Author Contributions:** Methodology and Writing—Original Draft Preparation: B.N.; Validation and Supervision: N.B., P.T., E.K.; Formal analysis: N.B., G.S., I.L.; Writing—Review and Editing: N.B., A.G.M., L.M.I., M.O.

**Funding:** This research was funded by Ministry of National Education and Scientific Research, Romania, grant numbers PN-III P1-1.2-PCCDI2017-0332 and PN-III P2-2.1-PED-2016-1223.

**Acknowledgments:** This work was supported by a grant of the Ministry of National Education and Scientific Research, Romania, CNCS/CCCDI-UEFISCDI, within PNCDI III, code PN-III P1-1.2-PCCDI2017-0332 and title "Increasing the institutional capacity of bioeconomic research for the innovative exploitation of the indigenous vegetal resources in order to obtain horticultural products with high added value", and within PNCDI III, code PN-III P2-2.1-PED-2016-1223, number #53PED and title "Experimental validation of a propulsion system with hydrogen fuel cell for a light vehicle - Mobility with Hydrogen Demonstrator". The sponsors had no role in the design, execution, interpretation, or writing of the study. The research was performed in the Research Center "Modeling and Simulation of the Systems and Processes".

**Conflicts of Interest:** The authors declare no conflict of interest
