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1. (WO2017033474) HYBRID CONSTRUCTION MACHINE

Pub. No.:    WO/2017/033474    International Application No.:    PCT/JP2016/055003
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Tue Feb 23 00:59:59 CET 2016
IPC: E02F 9/20
E02F 9/26
Applicants: HITACHI CONSTRUCTION MACHINERY CO., LTD.
日立建機株式会社
Inventors: HITA Masafumi
日田 真史
IMURA Shinya
井村 進也
NISHIKAWA Shinji
西川 真司
Title: HYBRID CONSTRUCTION MACHINE
Abstract:
An output command calculation unit (40) of an HCU (36) controls battery discharge power from a power storage device (31) on the basis of the battery charge rate (SOC) and the current squared cumulative ratio (Risc) of the power storage battery (31). The HCU (36) thereby transitions from a normal mode (NMODE) to a speed reduction mode (LSMODE) and lowers the operation speed of a hydraulic actuator. A monitor display amount calculation unit (50) of the HCU (36) calculates a maximum speed reduction rate (DRs) on the basis of a battery discharge power limit value (Plim0) and an engine output upper limit value (Pemax) from the output command calculation unit (40). A monitor device (39) displays the reduction rate of the operation speed of the hydraulic actuator in the speed reduction mode (LSMODE) on the basis of the maximum speed reduction rate (DRs).