Title:
FAILURE DIAGNOSIS APPARATUS FOR AN EXHAUST GAS PURIFICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2016/024398
Kind Code:
A1
Abstract:
In a failure diagnosis apparatus that carries out standard diagnosis processing in which a failure of the particulate filter is diagnosed by making a comparison between an output value of the PM sensor at the time when a predetermined period of time has passed from a point in time at which sensor regeneration processing for removing the particulate matter deposited on an insulation layer of the PM sensor has ended, and a predetermined threshold value, the standard diagnosis processing is carried out in the case where rich spike processing according to the in-cylinder rich control is not carried out during the predetermined period of time, whereas the rich spike processing according to the in-cylinder rich control is carried out during the predetermined period of time, the standard diagnosis processing is not carried out.
Inventors:
NISHIJIMA HIROKAZU (JP)
KIDOKORO TORU (JP)
OGISO MAKOTO (JP)
TAKAOKA KAZUYA (JP)
KIDOKORO TORU (JP)
OGISO MAKOTO (JP)
TAKAOKA KAZUYA (JP)
Application Number:
PCT/JP2015/003996
Publication Date:
February 18, 2016
Filing Date:
August 07, 2015
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
International Classes:
F01N3/08; F01N3/021; F01N3/033; F01N3/10; F01N3/18; F01N3/20; F01N9/00; F01N11/00; F01N13/00
Domestic Patent References:
| WO2014076818A1 | 2014-05-22 | |||
| WO2014035322A1 | 2014-03-06 |
Foreign References:
| US20050016163A1 | 2005-01-27 | |||
| JP2012122399A | 2012-06-28 | |||
| JP4868096B2 | 2012-02-01 |
Attorney, Agent or Firm:
KAWAGUCHI, Yoshiyuki et al. (4-10 Higashi Nihonbashi 3-chome, Chuo-k, Tokyo 04, JP)
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