Title:
DIAGNOSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/046445
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 in exhaust; a resistance-type particulate matter sensor (20) that is provided downstream of the diesel particulate filter (52), that detects the amount of particulate matter from the current flowing through the particulate matter deposited between electrodes (22), and for which regeneration is possible by burning off the deposited particulate matter; an actual regeneration interval calculating unit (41) that calculates the actual interval from the completion of the regeneration of the sensor (20) until the start of the next regeneration; a particulate matter slippage calculating unit (43) that estimates the amount of particulate matter slip in the exhaust that is passing through the diesel particulate filter (52) by assuming the diesel particulate filter (52) is normal; an estimated regeneration interval calculating unit (45) that calculates, on the basis of the particulate matter slippage, the estimated interval from the completion of the regeneration of the sensor (20) until the start of the next regeneration; and a diesel particulate filter failure-normal determining unit (46) that determines whether the diesel particulate filter (52) has failed or is normal by comparing the actual interval to 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/JP2014/075668
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 | |||
| JP2009144577A | 2009-07-02 |
Other References:
See also references of EP 3051082A4
Attorney, Agent or Firm:
KINUTANI Nobuo (JP)
Nobuo Kinutani (JP)
Nobuo Kinutani (JP)
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