Title:
FAULT DIAGNOSIS SYSTEM OF CONTROL VALVE IN HYDRAULIC CIRCUIT
Document Type and Number:
Japanese Patent JP2016070488
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 in which many control valves are provided.SOLUTION: A fault diagnosis system includes fault diagnosis means 44 setting a plurality of test patterns in which two ore more control valves among a plurality of control valves are combined as a diagnosis object, and performing fault diagnosis with each test pattern as a unit on the basis of detection values of discharge pressures of first and second hydraulic pump 1, 2. The fault diagnosis system collates control valves with each other contained in a test pattern in which presence/absence of fault is diagnosed by the fault diagnosis means 44, and specifies a broken control valve.SELECTED DRAWING: Figure 3
Inventors:
FUNABIKI NAOTO
SHIMIZU YUSUKE
TAKEDA MASAKAZU
SHIOJI YASUYUKI
SHIMABARA SEI
MATTHEW JAMES BESCHORNER
SHIMIZU YUSUKE
TAKEDA MASAKAZU
SHIOJI YASUYUKI
SHIMABARA SEI
MATTHEW JAMES BESCHORNER
Application Number:
JP2015127556A
Publication Date:
May 09, 2016
Filing Date:
June 25, 2015
Export Citation:
Assignee:
CATERPILLAR SARL
International Classes:
F15B20/00; F15B21/02
Domestic Patent References:
| JP2000046015A | 2000-02-15 | |||
| JPH07286603A | 1995-10-31 | |||
| JP2012241426A | 2012-12-10 | |||
| JP2012528364A | 2012-11-12 | |||
| JP2016065637A | 2016-04-28 |
Foreign References:
| EP2650548A2 | 2013-10-16 | |||
| US20110137515A1 | 2011-06-09 | |||
| GB2171778A | 1986-09-03 |
Attorney, Agent or Firm:
Tetsuo Hirose
Suzuki Yuko
Suzuki Yuko