WHAT ' S WRONG WITH ENERGY UTILIZATION IN HYDRAULIC CRANES

In this paper a short review on control strategy development of hydraulic crane systems is given. Energy utilization for different alternative driving concepts in an example hydraulic crane is evaluated and compared for a typical duty cycle. The possible factors that result in poor energy utilization and low efficiencies are analyzed and discussed. The answers to the question what is wrong with energy utilization in hydraulic cranes are tried to look for. On the other hand the suggestions that might improve energy utilization in hydraulic crane systems are presented.