Title:
METHOD FOR DETERMINING CONDITION OF EXHAUST SYSTEM, AND DEVICE FOR DETERMINING CONDITION OF EXHAUST SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/013965
Kind Code:
A1
Abstract:
A control unit (9) determines whether icing has occurred in a pressure differential sensor (8) that detects pressure loss of a GPF (5), or in an inlet-side pressure introduction pipe (10) or an outlet-side pressure introduction pipe (11) that are passages through which pressure is introduced to the pressure differential sensor (8). Upon determining that icing has occurred, the control unit (9) sets the count value of an icing cancelation counter to a prescribed initial value, and increases or decreases the count value of the icing cancelation counter from the initial value on the basis of the operating condition of an internal combustion engine (2), and when the count value of the icing cancelation counter reaches a prescribed threshold value for canceling the icing determination, determines that the icing that had occurred in the pressure differential sensor (8), the inlet-side pressure introduction pipe (10), or the outlet-side pressure introduction pipe (11) has melted. The count value of the icing cancelation counter decreases while the internal combustion engine (2) is temporarily stopped, and increases while the internal combustion engine (2) is operating.
Inventors:
SHIBATA TOHRU (JP)
HOSHINO MINA (JP)
HOSHINO MINA (JP)
Application Number:
PCT/JP2022/027803
Publication Date:
January 18, 2024
Filing Date:
July 15, 2022
Export Citation:
Assignee:
NISSAN MOTOR (JP)
International Classes:
F01N3/023; B60W20/16; F01N11/00
Domestic Patent References:
| WO2015128970A1 | 2015-09-03 |
Foreign References:
| JP2020143595A | 2020-09-10 | |||
| JP2012184756A | 2012-09-27 | |||
| JPH11132026A | 1999-05-18 | |||
| CN110469403A | 2019-11-19 | |||
| CN113775398A | 2021-12-10 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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