发明名称 |
Reducing agent supply error detecting method for an exhaust gas control catalyst and corresponding detecting apparatus |
摘要 |
When a reducing agent is supplied from a supply valve into an exhaust port, an air-fuel ratio detected by an air-fuel ratio sensor becomes lower than an air-fuel ratio generated by fuel injected from a fuel injection valve into a combustion chamber. An estimated supply amount is obtained by periodically accumulating a reducing agent supply amount corresponding value which appears in the change in the air-fuel ratio, in step S186. Accordingly, the estimated supply amount can be obtained with high accuracy. Then, by comparing the estimated supply amount with a determination value in step S190, a supply error can be detected with high accuracy. As a result, an abnormal determination in step S194/a normal determination in step S196 concerning the supply valve can be performed accurately. <IMAGE> <IMAGE> |
申请公布号 |
EP1505271(A1) |
申请公布日期 |
2005.02.09 |
申请号 |
EP20040018631 |
申请日期 |
2004.08.05 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
UCHIDA, TAKAHIRO;SUGIYAMA, TATSUMASA;ITO, YOSHIYASU;MORIKAWA, ATSUSHI |
分类号 |
F02M25/07;B01D53/94;F01N3/08;F01N3/20;F01N3/24;F01N3/36;F01N11/00;F02D41/14;F02D45/00 |
主分类号 |
F02M25/07 |
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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