发明名称 |
Failure determination system and method for internal combustion engine and engine control unit |
摘要 |
A failure determination system and method for an internal combustion engine and an engine control unit are provided which are capable of properly determining a failure of a variable valve mechanism for inactivating a valve system associated with at least one of cylinders during a predetermined operation of the engine, by discriminating a misfire caused by the failure of the mechanism from a normal misfire. Fuel injection valves inject fuel for each cylinder and oxygen concentration of exhaust gases is detected. A misfire condition is detected on a cylinder-by-cylinder basis. Fuel injection to a misfiring cylinder is stopped. A failure of the mechanism is determined, when a parameter based on the oxygen concentration detection indicates a richer value of an actual air-fuel ratio of the exhaust gases than a predetermined reference value does, under a condition of the fuel injection being stopped.
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申请公布号 |
US2003110845(A1) |
申请公布日期 |
2003.06.19 |
申请号 |
US20020319176 |
申请日期 |
2002.12.12 |
申请人 |
HONDA GIKEN KOGYO KABUSHIKI KAISHA |
发明人 |
KUMAGAI KATSUHIRO;KITAJIMA SHINICHI;NISHIOKA FUTOSHI;SHINOHARA TOSHINARI;NAKAUNE KAN;MATSUBARA ATSUSHI |
分类号 |
F01L1/46;F02D13/02;F02D13/06;F02D41/00;F02D41/12;F02D41/22;F02D45/00;G01M15/10;(IPC1-7):G01L3/26 |
主分类号 |
F01L1/46 |
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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