发明名称 |
Abnormality diagnostic method for exhaust gas recirculation control system |
摘要 |
A control unit (40) for an exhaust gas recirculation control system (30) compares an actual intake air quantity GN with a predetermined quantity GNC1 when an engine (10) is in a stable idling state (steps S100,S110). Then, presuming there is a t endency for the amount of recirculated exhaust gas from the exhaust gas recirculation control system (30) to be less than a reference amount corresponding to the stable idling state, a recirculated exhaust gas insufficient flag XS is set to "ON" (step S140) after the actual intake air quantity GN has exceeded the predetermined quantity GNC1 for a predetermined period of time (steps S120,S130). The control unit (40) th en makes a condition for making a positive diagnosis more difficult to fulfill so that it is more difficult to make a positive diagnosis when the recirculated exhaust gas insufficient flag XS is set to "ON." <IMAGE> |
申请公布号 |
EP1365139(A3) |
申请公布日期 |
2003.12.17 |
申请号 |
EP20030011624 |
申请日期 |
2003.05.22 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA |
发明人 |
UCHIDA, TAKAHIRO;KOTANI, AKIRA;ITOH, YOSHIYASU;MORIKAWA, ATSUSHI |
分类号 |
F02D21/08;F02D41/00;F02D41/18;F02D41/22;F02D45/00;F02M25/07 |
主分类号 |
F02D21/08 |
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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