Title:
パティキュレートフィルタの異常判定方法および異常判定装置
Document Type and Number:
Japanese Patent JP7194360
Kind Code:
B2
Abstract:
To prevent such a situation that a particulate filter is erroneously determined as abnormal when fuel is cut.SOLUTION: A differential pressure on upstream and downstream sides of GPF (particulate filter) 33 is detected by a pressure sensor 35. For the detected differential pressure, a weight value is determined from a weight characteristic set according to an engine operation state, and its integrated value is calculated. A weight differential pressure obtained by weighing the detected differential pressure by the weight value is calculated, and its integrated value is calculated. When the integrated value of the weight value becomes not less than a preset and predetermined value, by comparing an average travelling value of the weight differential pressure with a preset determination threshold, abnormality of the GPF 33 is determined. When the fuel is cut, the integrated value is reduced (for example, reset to 0).SELECTED DRAWING: Figure 12
More Like This:
Inventors:
Hiroshi Yoshida
Takayuki Araki
Shinichi Kure
Tomokuni Kusunoki
Takayuki Araki
Shinichi Kure
Tomokuni Kusunoki
Application Number:
JP2019081460A
Publication Date:
December 22, 2022
Filing Date:
April 23, 2019
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
F01N3/18; B01D46/42; F01N3/023
Domestic Patent References:
| JP2009216077A | ||||
| JP201552291A | ||||
| JP2006257881A | ||||
| JP200875571A | ||||
| JP20082309A |
Foreign References:
| US20100242449 | ||||
| WO2009139218A1 | ||||
| WO2015093603A1 |
Attorney, Agent or Firm:
Murata Minoru
Yoshitaka Funase
Kiyotaka Totsuka
Yoshitaka Funase
Kiyotaka Totsuka
Previous Patent: Abnormality determination method and abnormality determination device for particulate filter
Next Patent: TOBACCO CASE
Next Patent: TOBACCO CASE