Electro-hydraulic drive system for a work machine

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United States of America Patent

PATENT NO 9109586
APP PUB NO 20130180247A1
SERIAL NO

13816337

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Abstract

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An electro-hydraulic drive system for a work machine which drives an upper rotary body by controlling a flow rate of a hydraulic fluid by a control valve, includes an electro-hydraulic pump including a hydraulic pump driven by an engine, and a first electric motor, and an electro-hydraulic motor including a hydraulic motor rotated by the hydraulic oil supplied from the electro-hydraulic pump, and a second electric motor, and a controller which determines an operating state of the first electric motor and an operating state of the second electric motor based on a load of the electro-hydraulic pump and a load of the electro-hydraulic motor, and is able to perform an efficient operation by using a hydraulic pressure (fluid pressure) and electric power.

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Patent Owner(s)

Patent OwnerAddress
KAWASAKI JUKOGYO KABUSHIKI KAISHAKOBE-SHI HYOGO 650-8670

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Imamura, Yukito Kobe, JP 6 21
Yamada, Masahiro Kobe, JP 409 3595
Yamamoto, Ryo Kobe, JP 81 519

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