In order to make construction processes more efficient, a 6 ton class hybrid excavator was developed through a collaborative effort between KOBELCO CONSTRUCTION MACHINERY, Kobe Steel, and NEDO. Reductions in fuel consumption were evaluated through simulations on a series-type hybrid system. Then a prototype demonstration machine was built to simulate practical operations. The experimental results proved that the proposed system can reduce fuel consumption by more than 60%. The remaining challenge is to develop a manufacturing process which reduces the cost of the components constituting this new hybrid system.
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