Title:
DRIVE DEVICE FOR CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2020/202309
Kind Code:
A1
Abstract:
A pump limit flow rate, which is the upper-limit value of pump flow rates that can be discharged from a plurality of hydraulic pumps to each of a plurality of hydraulic actuators, is calculated in accordance with the pressure of pressure oil that is supplied to the hydraulic actuators and a limit power that is preset as the upper-limit value of the absorption power of each of the hydraulic pumps; the required flow rates of the hydraulic actuators are calculated in accordance with the operation amounts of operating levers; the distributed flow rate of pressure oil supplied to the hydraulic actuators is calculated on the basis of the required flow rates and the pump limit flow rate; and the discharge flow rate of each of the hydraulic pumps is calculated in accordance with the distributed flow rate. It is thereby possible to appropriately limit the absorption power of the hydraulic pumps and to minimize any decrease in the ease of operation.
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Inventors:
TAKAHASHI HIROMASA (JP)
SHIMIZU JURI (JP)
SHIMIZU JURI (JP)
Application Number:
PCT/JP2019/014157
Publication Date:
October 08, 2020
Filing Date:
March 29, 2019
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
F15B11/02; E02F9/20; E02F9/22; F15B11/17
Domestic Patent References:
| WO2018061128A1 | 2018-04-05 |
Foreign References:
| JP2018145985A | 2018-09-20 | |||
| JP2002047000A | 2002-02-12 |
Attorney, Agent or Firm:
KAICHI IP (JP)
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