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Hitachi Review Vol. 62 (2013), No. 2 118. Adoption of Electrification and Hybrid Drive for more energy - efficient construction machinery Manabu Edamura, Dr. Eng. OVERVIEW: As for automobiles, electric and Hybrid drives are effective Seiji Ishida technologies for improving the energy efficiency of construction machinery . In Shinya Imura July 2011, Hitachi construction machinery Co., Ltd. released the 20-metric- ton ZH200 Hybrid hydraulic excavator. Having overcome the cost, reliability, Shiho Izumi durability, and safety challenges associated with the Adoption of Hybrid Drive , the number of ZH200 machines in service is steadily growing thanks to the strong reputation it has earned for ease of use and work performance as well as for energy efficiency.

Adoption of Electrification and Hybrid Drive for More Energy-efficient Construction Machinery 119 its engine to turn a hydraulic pump, which in turn

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