Title:
FAULT DIAGNOSIS SYSTEM OF CONTROL VALVE IN HYDRAULIC CIRCUIT
Document Type and Number:
Japanese Patent JP2016065637
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To easily specify a broken control valve in a case where a control valve is broken, even in a hydraulic circuit where many control valves are provided.SOLUTION: A fault diagnosis system of a control value in a hydraulic circuit includes: fault diagnosis execution means 47 of setting a plurality of test patterns in which two or more control valves among a plurality of control valves 25, 26, 27, 29, 32, 33 are combined as a diagnosis object, and executing fault diagnosis with each test pattern as a unit; and fault valve specification means 48 of collating control valves with each other contained a test pattern in which the presence/absence of a fault is diagnosed by the fault diagnosis execution means 47 thereby to specify a broken control valve.SELECTED DRAWING: Figure 2
Inventors:
FUNABIKI NAOTO
MATTHEW JAMES BESCHORNER
MATTHEW JAMES BESCHORNER
Application Number:
JP2015127634A
Publication Date:
April 28, 2016
Filing Date:
June 25, 2015
Export Citation:
Assignee:
CATERPILLAR SARL
International Classes:
F15B20/00; E02F9/22
Domestic Patent References:
| JPH07286603A | 1995-10-31 | |||
| JP2012241426A | 2012-12-10 | |||
| JP2012528364A | 2012-11-12 | |||
| JP2016070488A | 2016-05-09 |
Foreign References:
| EP2650548A2 | 2013-10-16 | |||
| US20110137515A1 | 2011-06-09 | |||
| GB2171778A | 1986-09-03 |
Attorney, Agent or Firm:
Tetsuo Hirose
Suzuki Yuko
Suzuki Yuko