Title:
命令されないスプールバルブポジショニングを検出して油圧アクチュエータへの流体の流れを停止させるための方法
Document Type and Number:
Japanese Patent JP7026472
Kind Code:
B2
Abstract:
A system and method for detecting uncommanded positioning of at least one valve spool in a plurality of valve spools and for stopping fluid flow to a plurality of hydraulic actuators fluidly connected to the plurality of valve spools is disclosed. The method may comprise receiving a signal fluid pressure detected in a signal passageway, identifying whether at least one activation command is currently enabled, and stopping the flow of fluid to the plurality of hydraulic actuators if no activation command is enabled for any of the plurality of valve spools, and the signal fluid pressure when detected (1) upstream of the plurality of valve spools is greater than a first threshold or (2) downstream of the plurality of valve spools is less than a second threshold.
Inventors:
David Jay Lomax
Joshua Dee Callaway
Joshua Dee Callaway
Application Number:
JP2017192406A
Publication Date:
February 28, 2022
Filing Date:
October 02, 2017
Export Citation:
Assignee:
CATERPILLAR INCORPORATED
International Classes:
F15B20/00; F15B11/08
Domestic Patent References:
| JP2006308073A | ||||
| JP10281112A | ||||
| JP2014206022A | ||||
| JP2016114129A | ||||
| JP2012225050A | ||||
| JP2005265062A | ||||
| JP2008082539A |
Foreign References:
| EP2541074A1 |
Attorney, Agent or Firm:
Patent Business Corporation Tani / Abe Patent Office
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