The above-mentioned machines, often referred to as mobile work machines, usually perform their tasks with the aid of hydraulic systems. Hydraulic systems are used because they offer high power density while also being robust and reliable. A traditional hydraulic system basically consists of a pump that delivers flow, which is distributed via valves to hydraulic cylinders and hydraulic motors. The flow causes these to move and the tasks are performed. In mobile applications, the pump has usually been driven by a combustion engine, but now that combustion engines are being replaced by electric motors, new conditions are emerging – both economically and technically.
Previously, energy savings only resulted in reduced fuel costs. For battery-powered machines, however, energy savings can also reduce the purchase cost, as batteries account for a significant part of this. For trucks, for example, reduced weight is also of great importance, as the system weight limits the permissible load weight. It is therefore of great interest to invest in the hydraulic system in order to reduce energy consumption and thus be able to reduce the battery size.
Previously, energy savings only resulted in reduced fuel costs. For battery-powered machines, however, energy savings can also reduce the purchase cost, as batteries account for a significant part of this. For trucks, for example, reduced weight is also of great importance, as the system weight limits the permissible load weight. It is therefore of great interest to invest in the hydraulic system in order to reduce energy consumption and thus be able to reduce the battery size.
