Title:
DIAGNOSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/046446
Kind Code:
A1
Abstract:
The purpose of the present invention is to precisely determine diesel particulate filter failure. A diagnosing device comprises: a diesel particulate filter (52) that collects particulate matter discharged from an engine (10); a resistance-type particulate matter sensor (20) that detects the amount of particulate matter and for which regeneration is possible by burning off the particulate matter when the particulate matter deposited between electrodes (22) reaches a prescribed amount; an actual regeneration interval calculating unit (41) that calculates the actual interval from the completion of the regeneration of the resistance-type particulate matter sensor (20) until the start of the next regeneration; a particulate matter slippage calculating unit (42, 43) that estimates the amount of particulate matter slippage passing through the diesel particulate filter (52); an estimated regeneration interval calculating unit that calculates, on the basis of a multiple regression equation that includes the exhaust state function and particulate matter slippage as input values, the estimated interval from the completion of the regeneration of the resistance-type particulate matter sensor (20) until the start of the next regeneration by estimating the amount of particulate matter deposited between the electrodes (22); and a diesel particulate filter diagnosing unit (45) that determines whether the diesel particulate filter (52) has failed or is normal by comparing the actual interval with the estimated interval.
Inventors:
HANAWA SATOSHI (JP)
UCHIYAMA TADASHI (JP)
FUJIE HIDEKAZU (JP)
NAKADA TERUO (JP)
MURASAWA NAOTO (JP)
UCHIYAMA TADASHI (JP)
FUJIE HIDEKAZU (JP)
NAKADA TERUO (JP)
MURASAWA NAOTO (JP)
Application Number:
PCT/JP2014/075669
Publication Date:
April 02, 2015
Filing Date:
September 26, 2014
Export Citation:
Assignee:
ISUZU MOTORS LTD (JP)
International Classes:
F01N3/02; F01N3/023; F01N3/18
Foreign References:
| JP2012122399A | 2012-06-28 | |||
| JP2013083241A | 2013-05-09 | |||
| JP2013068197A | 2013-04-18 | |||
| JP2014185541A | 2014-10-02 | |||
| JP2011179467A | 2011-09-15 |
Attorney, Agent or Firm:
KINUTANI Nobuo (JP)
Nobuo Kinutani (JP)
Nobuo Kinutani (JP)
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