Title:
排気浄化装置および内燃機関システム
Document Type and Number:
Japanese Patent JP7172520
Kind Code:
B2
Abstract:
To promptly eliminate nitrogen oxide and ammonia included in exhaust gas in an exhaust emission control device for purifying the exhaust gas from an ammonia engine.SOLUTION: An exhaust emission control device that purifies exhaust gas from an internal combustion engine using ammonia as fuel includes: a catalyst having a function for reducing nitrogen oxide and a function for oxidizing ammonia; an active state detection section detecting an active state of the catalyst; a first air-fuel ratio acquisition section acquiring an air-fuel ratio in exhaust gas upstream of the catalyst; and a control section controlling supply amount of ammonia obtained by a fuel supply section supplying ammonia to the internal combustion engine. When the catalyst is in the active state and a concentration index value calculated by using the air-fuel ratio acquired by the first air-fuel ratio acquisition section and indicating progress of oxygen poisoning in the catalyst exceeds a predetermined threshold value, the control section temporarily increases the supply amount of ammonia to excessively enrich the air-fuel ratio of the exhaust gas.SELECTED DRAWING: Figure 1
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Inventors:
Koike Makoto
Tetsunori Suzuoki
Tetsunori Suzuoki
Application Number:
JP2018226269A
Publication Date:
November 16, 2022
Filing Date:
December 03, 2018
Export Citation:
Assignee:
Toyota Central R & D Labs.
International Classes:
F01N3/20; F01N3/08; F01N3/24; F02D19/02
Domestic Patent References:
| JP2014211154A |
Foreign References:
| WO2011136034A1 | ||||
| US8370049 |
Attorney, Agent or Firm:
Junya Tanabe
Yukie Itakura
Seiji Kizaki
Yukie Itakura
Seiji Kizaki
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