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    • 1. 发明专利
    • Misfire identification device, and a misfire determining method for an internal combustion engine
    • 空值
    • JP4525538B2
    • 2010-08-18
    • JP2005259479
    • 2005-09-07
    • トヨタ自動車株式会社
    • 修 原田章弘 片山彦和 秋本隆弘 西垣
    • F02D45/00B60K6/445B60W10/06B60W20/00F01N3/20F01N3/24F02D29/02F02P5/15G01M15/04G01M15/06G01M15/11
    • B60W20/50B60K6/445B60W10/06B60W20/00B60W30/20F02D41/0097F02D41/0245F02D41/1498F02D2200/1015F02P5/1506G01M15/11Y02T10/26Y02T10/46Y02T10/54Y02T10/6239
    • The engine misfire detection apparatus of the invention successively determines whether a rotational fluctuation difference Nxd360 as a difference between a rotational fluctuation Nxd at a certain crank angle CA of an engine and a rotational fluctuation Nxd at a 360 degree-prior crank angle CA exceeds a predetermined reference value A1 (step S150) and whether a rotational fluctuation difference Nxd720 as a difference between the rotational fluctuation Nxd at the certain crank angle CA and a rotational fluctuation Nxd at a 720 degree-prior crank angle CA exceeds a predetermined reference value B1 (step S160). The engine misfire detection apparatus detects a misfire of the engine upon satisfaction of all conditions regarding rotational fluctuation difference proportions Nja2, Nja3, and Nja4 on the basis of the rotational fluctuation difference Nxd360 (step S200) and all conditions regarding rotational fluctuation difference proportions Njb2, Njb3, and Njb4 on the basis of the rotational fluctuation difference Nxd720 (step S210), when both the rotational fluctuation differences Nxd360 and Nxd720 exceed the respective reference values A1 and B1 (steps S150 and S160). This arrangement ensures adequate and accurate detection of an engine misfire during warm-up of a catalyst included in an exhaust emission control unit with a significant delay of the ignition timing in the engine.
    • 本发明的发动机失火检测装置,连续地判定作为发动机的特定曲柄角CA处的旋转变动量Nxd与360度的曲轴角CA的旋转变动量Nxd之间的差的旋转变动差Nxd360是否超过规定值 参考值A1(步骤S150)以及作为在特定曲柄角CA处的旋转波动Nxd与720度以前曲轴角CA之间的旋转波动Nxd之间的差的旋转波动差Nxd720是否超过预定参考值B1(步骤 S160)。 发动机失火检测装置在满足关于旋转波动差比例Nja2,Nja3和Nja4的所有条件基于旋转波动差Nxd360(步骤S200)和关于旋转波动差比例Njb2的所有条件的情况下,检测发动机失火, (步骤S210),当旋转波动差Nxd360和Nxd720都超过各个基准值A1和B1(步骤S150和S160)时,Njb3和Njb4基于旋转波动差Nxd720(步骤S210)。 这种布置确保了在包括在废气排放控制单元中的催化剂预热期间发动机失火的充分和准确的检测,其中引擎中的点火正时显着延迟。