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Study of the Energy Conversion Process in the Electro-Hydrostatic Drive of a Vehicle

By Wiesław Grzesikiewicz, Lech Knap, Michał Makowski and Janusz Pokorski


In the paper, we describe a study of an electro-hydrostatic hybrid drive of a utility van intended for city traffic. In this hybrid drive, the electric drive is periodically accompanied by hydrostatic drive, especially during acceleration and regenerative braking of the vehicle. We present a mathematical model of the hybrid drive as a set of dynamics and regulation equations of the van traveling at a given speed. On this basis, we construct a computer program which we use to simulate the processes of energy conversion in the electro-hydrostatic drive. The main goal of the numerical simulation is to assess the possibility of reducing energy intensity of the electric drive through such a support of the hydrostatic drive. The obtained results indicate that it is possible to reduce the load on elements of the electric system and, therefore, improve energy conversion

Topics: hybrid drive, electric drive, hydrostatic drive, energy consumption, energy efficiency, regenerative braking, city traffic, numerical simulations, Technology, T
Publisher: MDPI AG
Year: 2018
DOI identifier: 10.3390/en11020348
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