Title:
CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2023/190329
Kind Code:
A1
Abstract:
Provided is a construction machine comprising a plurality of hydraulic actuators, a hydraulic pump that ejects pressure oil to drive the hydraulic actuators, an engine that drives the hydraulic pump, a plurality of operation lever devices that operate the corresponding hydraulic actuators, a key switch that starts the engine, a rotation speed sensor that detects the rotation speed of the engine, a plurality of operation sensors that detect the operation of the corresponding operation lever devices, and a controller that drives the corresponding hydraulic actuators according to the operation of the operation lever devices. The controller determines, on the basis of signals from the key switch, the rotation speed sensor, and the plurality of operation sensors, whether the operation of the operation lever devices is the initial operation after the start of the engine, and restricts the operation speed of the hydraulic actuators if the operation of the operation lever devices is the initial operation after the start of the engine.
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Inventors:
UJI KATSUMASA (JP)
Application Number:
PCT/JP2023/012181
Publication Date:
October 05, 2023
Filing Date:
March 27, 2023
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACH CO (JP)
International Classes:
E02F9/20; E02F9/24; F15B20/00
Domestic Patent References:
| WO2019044665A1 | 2019-03-07 |
Foreign References:
| JP2021110136A | 2021-08-02 | |||
| JP2000104291A | 2000-04-11 | |||
| JP2006144296A | 2006-06-08 |
Attorney, Agent or Firm:
KAICHI IP (JP)
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