发明名称 |
Method for determining a failure of an EGR apparatus |
摘要 |
A method for determining a failure of an exhaust gas recalculation (EGR) apparatus in which a failure of the EGR apparatus is determined by determining whether a difference between an intake manifold pressure developed when an EGR valve is open and that developed when the EGR valve is closed falls within a specified range, the EGR valve being temporarily opened and closed while failure determination is being implemented. The failure determination is aborted so as to prevent erroneous determination, if a variation of the engine speed exceeds a specified value during the failure determination, or if a variation of the opening degree of an idling speed control (ISC) valve, disposed in a bypass passage installed in an intake passage of an engine in a manner bypassing a throttle valve, exceeds a specified value during the failure determination, or if a fuel control mode changes during the failure determination. Alternatively, to prevent erroneous determination, an intake manifold pressure difference is corrected in accordance with a variation of the engine speed or a variation of the ISC valve opening degree during the failure determination, or the ISC valve opening degree is fixed during the failure determination.
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申请公布号 |
US5513616(A) |
申请公布日期 |
1996.05.07 |
申请号 |
US19940202161 |
申请日期 |
1994.02.25 |
申请人 |
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA |
发明人 |
MATSUMOTO, TAKUYA;HASHIMOTO, TORU;NAMIKI, KOICHI;NOMA, KAZUTOSHI;YOSHIDA, YASUHISA |
分类号 |
F02B1/04;F02D41/00;F02D41/22;F02M25/07;(IPC1-7):F02M25/07 |
主分类号 |
F02B1/04 |
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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