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Title:
MONITORING METHOD FOR PERFORMANCE OF LUBRICATING OIL COOLER IN AUXILIARY POWER UNIT OF AIRCRAFT
Document Type and Number:
Japanese Patent JP2015038346
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a monitoring method of a lubricating oil cooler in an auxiliary power unit of an aircraft.SOLUTION: The invention relates to a method for performance detection of a lubricating oil cooler in an auxiliary power unit APU, and comprises the steps of: obtaining APU messages within a certain time period; obtaining operation parameters of the lubricating oil cooler in the APU on the basis of the APU messages, the operation parameters including lubricating oil temperatures OTA and load compressor inlet temperatures LCIT (6100); obtaining revised lubricating oil temperatures OT by a formula of "revised lubricating oil temperature OT=lubricating oil temperature OTA-load compressor inlet temperature LCIT" (6200); and on the basis of a change trend of the revised lubricating oil temperatures OT with respect to time, determining that the performance of the lubricating oil cooler in the APU is in a stable phase, a decline phase or a failure phase (6500-6800).

Inventors:
GU ZHUPING
DING HUIFENG
ZHENG FENGLIANG
WU JIAJU
CHEN REI
HUANG LEI
ZHANG HAILONG
WANG BINGZHENG
Application Number:
JP2014151058A
Publication Date:
February 26, 2015
Filing Date:
July 24, 2014
Export Citation:
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Assignee:
AIR CHINA LTD
International Classes:
F01D25/18; B64D41/00; B64D45/00; F02C7/00; F02C7/06
Domestic Patent References:
JP2013028341A2013-02-07
JP2013018482A2013-01-31
JP2001263581A2001-09-26
Foreign References:
US20120312023A12012-12-13
WO2009020229A12009-02-12
US20050222747A12005-10-06
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito