CONSTRUCTION MACHINE - HITACHI CONSTRUCTION MACH CO

Title:

CONSTRUCTION MACHINE

Document Type and Number:

WIPO Patent Application WO/2020/179429

Kind Code:

A1

Abstract:

The objective of the present invention is to prevent the speed of a given actuator from decreasing and the work speed from decreasing when that actuator is being driven by discharge oil from a plurality of pumps and an operator accidentally carries out a slight operation of the operation lever of another actuator. To this end, a controller (41) sets, as a combined deadband line which serves as a boundary of a combined deadband, a combined deadband line which serves as a boundary of the combined deadband such that, as the operation amount in one direction of operations levers (12L, 13L) of operation lever devices (12, 13) increases, the width of the combined deadband corresponding to the operation amount of the operation lever in the other direction increases, and when the operation amount in the one direction of the operation lever is within the range of the combined deadband and the operation lever is operated in the other direction and that operation amount exceeds the combined deadband line, the controller corrects the operation amount in the other direction such that the requested flow rate of the actuator increases from zero.

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Inventors:

TAKAHASHI HIROMASA (JP)
HIRAKU KENJI (JP)
SAITOH TEPPEI (JP)
SUGIKI SYOUHEI (JP)

Application Number:

PCT/JP2020/006185

Publication Date:

September 10, 2020

Filing Date:

February 18, 2020

Export Citation:

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Assignee:

HITACHI CONSTRUCTION MACH CO (JP)

International Classes:

F15B11/17; E02F9/22

Foreign References:

JP2017053383A	2017-03-16
JPS6456631U	1989-04-10
JP2019052484A	2019-04-04
JP2017053383A	2017-03-16

Other References: