A dynamic Simulation technique using SINDYS is proposed for evaluating the energy efficiency of the power system on the hydraulic excavator. An engine evaluation system is also developed for evaluating the engine fuel consumption and the matching between the engine and the hydraulic system, which is valuable system for newly developing hydraulic excavator. ACERA Geospec excavator series has been commercially available, through the successful development solving the trade-off between the emission regulation and fuel saving. This achievement was made possible through the dynamic simulation of the power system and the engine evaluation system.
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