发明名称 |
EXHAUST GAS PURIFICATION SYSTEM AND EXHAUST GAS PURIFICATION METHOD |
摘要 |
Provided is an exhaust gas purification system 1 including a catalyst device 31a configured to recover a purification capacity of a catalyst by an air-fuel ratio richness control, wherein a richness control permission range ± where the air-fuel ratio richness control is permitted to be performed, and a richness control prohibition range ² where the air-fuel ratio richness control is prohibited from being performed are provided; by using a catalyst temperature T of the catalyst device 31a and also an air intake amount A of an internal combustion engine 10 as parameters for determination as to the richness control permission range ± or the richness control prohibition range ², the richness control prohibition range ² is set as a range where the catalyst temperature T of the catalyst device 31a is lower than a preset lower limit catalyst temperature Tc and the air intake amount A is larger than a preset upper limit air intake amount Ac; and further the lower limit catalyst temperature Tc is set to a temperature lower than a catalyst activation temperature Ta. This makes it possible to reduce the HC and NOx slip amounts and raise the catalyst temperature T when the temperature is low. |
申请公布号 |
EP3054119(A1) |
申请公布日期 |
2016.08.10 |
申请号 |
EP20140847132 |
申请日期 |
2014.09.29 |
申请人 |
ISUZU MOTORS LIMITED |
发明人 |
NAGAOKA, DAIJI;YUZA, HIROYUKI;NAKADA, TERUO |
分类号 |
F01N3/20;F01N3/24;F01N3/28;F01N3/36;F02D41/04 |
主分类号 |
F01N3/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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