The project aims to detect and solve out the complex items related to the increase of power efficiency at industrial consumers, items regarding the exploitation or development of fluid power systems for stationary or mobile devices which are to benefit from the advantages of secondary adjustment. In order to achieve its purpose, this project intends to quantify, as accurately as possible, the advantages of secondary adjustment in hydraulic drive as to the power efficiency, with a view to determine industrial agents that are using or developing fluid power systems to reconsider such systems from the power consumption viewpoint.

The main advantages of the secondary adjustment (the coupling of the primary element to the secondary one is performed under constant pressure) compared to the primary adjustment (the coupling of the primary element to the secondary one is performed under constant flow) in fluid power systems are: the possibility for several consumers to operate in parallel with no restrictions; the transfer of hydraulic energy from the primary element of a transmission to the secondary one is performed with no loss, unlike the case of using throttles; some power increment on return, using no throttles, to the benefit of other consumers or the primary elements of a hydraulic transmission; constant operation pressure which reduces the influence that the hydraulic rigidity of the oil has upon the dynamic performances of fluid power systems; the possibility for hydraulic accumulators to be connected anywhere within a fluid power system.