Title:
排気浄化装置
Document Type and Number:
Japanese Patent JP7125664
Kind Code:
B2
Abstract:
To provide an exhaust emission control device which can reduce a frequency of a rich purge, and can minimize a NOx discharge amount and fuel consumption.SOLUTION: In an exhaust emission control device having catalyst devices arranged in an exhaust passage to which an exhaust gas is discharged from an internal combustion engine, the catalyst device 1A using a three-dimensional catalyst 3 is arranged in the exhaust gas passage 2, the catalyst device 1B using an occlusion reduction type NOx catalyst 4 is arranged at a downstream side of the catalyst device using the three-dimensional catalyst 3, the catalyst device 1A using the three-dimensional catalyst 3 is constituted so that a low-performance portion 5A whose low-temperature activity of OSC is relatively low is arranged along a longitudinal direction of an outlet from an inlet in a part of a face orthogonal to a flow of the exhaust gas, and the occlusion reduction type NOx catalyst 4 arranged at a downstream side of the three-dimensional catalyst 3 is made to generate a deemed low-performance portion 5B. Discharge NOx amount detection means 6 for estimating or detecting a discharge NOx amount discharged from the internal combustion engine is arranged at a downstream side of an exhaust gas flow direction of the catalyst device 1B using the occlusion reduction type NOx catalyst 4.SELECTED DRAWING: Figure 1
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Inventors:
Toyofumi Tsuda
Application Number:
JP2018073217A
Publication Date:
August 25, 2022
Filing Date:
April 05, 2018
Export Citation:
Assignee:
SUZUKI KABUSHIKI KAISHA
International Classes:
F01N3/28; B01J35/04; F01N3/08
Domestic Patent References:
| JP434425U | ||||
| JP2007170233A | ||||
| JP62117220U | ||||
| JP466716A |
Foreign References:
| DE102015219114A1 |
Attorney, Agent or Firm:
Okuyama Shoichi
Kohei Arihara
Tetsuo Matsushima
Nakamura Ayako
Soji Morimoto
Yu Tanaka
Koichi Tokumoto
Kohei Arihara
Tetsuo Matsushima
Nakamura Ayako
Soji Morimoto
Yu Tanaka
Koichi Tokumoto
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