发明名称 |
ABNORMALITY DETECTION APPARATUS FOR EXHAUST GAS PURIFICATION APPARATUS AND ABNORMALITY DETECTION METHOD FOR EXHAUST GAS PURIFICATION APPARATUS |
摘要 |
It is determined quickly whether there is a shortage in reducing agent supplied to an NOx selective reduction catalyst. After it is determined that a quantity of reducing agent equal to or larger than a predetermined quantity is absorbed in the NOx selective reduction catalyst on the assumption that there is no abnormality in reducing agent supply unit, the supply of a quantity of reducing agent needed to reduce a quantity of NOx flowing into the NOx selective reduction catalyst is started. A determination of an abnormality in the reducing agent supply unit is made based on the NOx removal rate after the lapse of a predetermined period of time since the start of the supply of reducing agent. The NOx removal rate becomes lower when there is an abnormality in the reducing agent supply unit.
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申请公布号 |
US2011265461(A1) |
申请公布日期 |
2011.11.03 |
申请号 |
US200913121782 |
申请日期 |
2009.01.19 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
SHIBATA DAISUKE;ENDO SATOSHI;HAGIMOTO TAIGA;SAWADA HIROSHI |
分类号 |
F01N3/00 |
主分类号 |
F01N3/00 |
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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