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STEAM - a hydraulic hybrid architecture for excavators
Milos Vukovic, RWTH Aachen University, Institute for Fluid Power Drives and Controls (IFAS), Germany
Roland Leifeld, RWTH Aachen University, Institute for Fluid Power Drives and Controls (IFAS)
During the past three years the Institute for Fluid Power Drives and Controls in Aachen has developed a new hydraulic system for mobile machinery called STEAM. The system represents a new step in excavator hydraulics, as it aims to reduce both the hydraulic system losses as well as those of the internal combustion engine by using a hybrid hydraulic architecture with accumulators. Starting with initial simulation studies the development has been followed by scaled test bench measurements and has progressed to a full scale validation using an 18 t excavator. The following publication aims to summarise the results obtained thus far with the aim of making them available to industry and encouraging their implementation in future applications.