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IMPROVING THE ENERGY EFFICIENCY OF MULTIFUNCTION MOTOR VEHICLES BY EQUIPPING THEM WITH HYDROSTATIC PUMPS WITH LOAD SENSING
Abstract
Multifunctional motor vehicles are equipped with one or more working mechanisms actuated by hydrostatic drive systems, which consume most of the power installed on such vehicles in which the primary mechanical energy is generated by an internal combustion engine, usually Diesel engine. Given the large number of daily running hours, (of multifunctional motor vehicles) the energy consumed by working mechanisms becomes important, the same goes for the expenses, and therefore it is required to be used with maximum efficiency, especially because the processes of environmental pollution are significant. In this context, optimization of energy consumption, on each working mechanism, as the ultimate goal of research, becomes necessary and of high priority. The article presents a theoretical research, based on the method of mathematical modeling and numerical simulation, which highlights a solution for increasing the energy efficiency of consumption, namely by implementing hydrostatic pumps equipped with automatic hydraulic flow control devices, and respectively working speed control devices, i.e. devices of Load Sensing type. The objective of this research is to highlight the energy efficiency of such devices of Load Sensing type, by comparing the results obtained when using them with the results obtained when using the classic drive based on constant flow pumps. Given the fact that older multifunctional motor vehicles still operate on the market, and they are equipped with classic drive systems, on the one hand, and on the other hand, replacing them with modern pumps equipped with Load sensing devices does not require too much spending, a replacement of old pumps on many such machines would result in significant energy savings, and thus in reduced environmental pollution, considering also the fact that most of these vehicles operate in the urban environment, characterized by large urban agglomerations.
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