Title:
EXHAUST PURIFICATION METHOD AND DEVICE FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2024/075264
Kind Code:
A1
Abstract:
The present invention is provided with an NOx sensor (20) on the downstream side of a ternary catalyst (15) in an internal combustion engine (1), the NOx sensor (20) having sensitivity to NOx density and ammonia density in the exhaust, wherein a detection signal from the NOx sensor (20) is used in exhaust purification control. After the internal combustion engine (1) has started, an assessment is made as to whether there is a predetermined condition, such as a fuel cut in which ammonia is not generated in the ternary catalyst (15), and if the predetermined condition is present, the amount of ammonia detected by the NOx sensor (20) is compared to a predetermined threshold. If the amount of ammonia is less than the threshold, it is determined that there is no effect from ammonia dissolved in condensate water and the use of the detection signal from the NOx sensor (20) is allowed in the exhaust purification control.
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Inventors:
MURAKAMI KOUICHI (JP)
YOKOYAMA JIN (JP)
ITOYAMA HIROYUKI (JP)
SAKATA TOMOHIRO (JP)
YOKOYAMA JIN (JP)
ITOYAMA HIROYUKI (JP)
SAKATA TOMOHIRO (JP)
Application Number:
PCT/JP2022/037529
Publication Date:
April 11, 2024
Filing Date:
October 07, 2022
Export Citation:
Assignee:
NISSAN MOTOR (JP)
International Classes:
F01N3/20
Foreign References:
| JP2020045885A | 2020-03-26 | |||
| JP2010127268A | 2010-06-10 | |||
| JP2020041444A | 2020-03-19 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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