| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately determine misfire of an internal combustion engine of a plurality of cylinders according to a road surface state. <P>SOLUTION: A misfire determination device determines whether the rotational fluctuation ΔNe of the engine speed Ne and the fluctuation Δθ of a torsion angle θ of a damper 28 are tuned when the difference of target rotation speed Ne* of an engine 22 and engine speed Ne is more than the threshold value Nref (S160), determines when the rotational fluctuation ΔNe is tuned to the torsion angle fluctuation Δθ, that the difference of the target rotation speed Ne* and the engine speed Ne becomes a threshold value Nref or more by misfire of either cylinder of the engine 22 (S170), and determines when the rotational fluctuation ΔNe is not tuned to the torsion angle fluctuation Δθ, that the difference of the target rotation speed Ne* and the engine speed Ne becomes the threshold value Nref or more by disturbance from the road surface (S180). As a result, which of the cylinder of the engine 22 occurs misfire is accurately determined according to the road surface state. <P>COPYRIGHT: (C)2013,JPO&INPIT |
