Invention Grant
- Patent Title: Drive control system for work machine
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Application No.: US15447654Application Date: 2017-03-02
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Publication No.: US10041225B2Publication Date: 2018-08-07
- Inventor: Mariko Mizuochi , Akinori Ishii , Kazuyoshi Hanakawa
- Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: Hitachi Construction Machinery Co., Ltd.
- Current Assignee: Hitachi Construction Machinery Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Mattingly & Malur, PC
- Priority: JP2016-069590 20160330
- Main IPC: G06F7/70
- IPC: G06F7/70 ; G06F19/00 ; G06G7/00 ; G06G7/76 ; E02F3/43 ; E02F9/20 ; E02F3/32 ; E02F9/22 ; E02F9/26 ; E02F3/42 ; G01M1/38 ; G05B13/00 ; G05B15/00 ; G05D23/00 ; E02F3/96
Abstract:
A drive control system for a work machine. A gradual stoppage command and an operation speed limitation command are calculated and output. A pilot pressure is corrected such that, upon a stoppage operation of a control lever, a drive actuator is stopped gradually; and the pilot pressure is corrected such that an operation speed of the drive actuator is limited. A supply of the pilot hydraulic fluid to the speed increasing unit is interrupted when a failure of a speed increasing solenoid proportional valve of the speed increasing unit is detected.
Public/Granted literature
- US20170284056A1 DRIVE CONTROL SYSTEM FOR WORK MACHINE Public/Granted day:2017-10-05
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