Construction machine

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United States of America Patent

PATENT NO 11149409
SERIAL NO

16081734

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Abstract

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A main controller and a hybrid controller control an engine, an assist generator motor, a hydraulic pump and an electricity storage device. In this case, the hybrid controller is provided with a performance state recovery part that performs performance state recovery of the electricity storage device. In a case where a performance state amount varying with repetition of a discharge and a charge of the electricity storage device, specifically, a current integrated value ratio of the electricity storage device goes beyond a predetermined threshold value (L1%), the performance state recovery part limits power of the hydraulic pump. Thereby, the performance state recovery part performs the performance state recovery of the electricity storage device.

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Patent Owner(s)

Patent OwnerAddress
HITACHI CONSTRUCTION MACHINERY CO LTDTOKYO JAPAN

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hita, Masafumi Kasumigaura, JP 17 41
Imura, Shinya Toride, JP 129 710
Ishida, Seiji Hitachinaka, JP 52 452
Naya, Itaru Tsuchiura, JP 8 23
Takeuchi, Ken Kasumigaura, JP 169 6391

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