| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a misfire determination device for an internal combustion engine, increasing a learning frequency of a correction value for misfire determination and thereby to accurately perform misfire determination. <P>SOLUTION: The misfire determination device 1 for an internal combustion engine determines a misfire state during combustion of the internal combustion engine 3 in a hybrid power plant HPP having the internal combustion engine 3 and an electric motor 7 mutually connected and operable in an electric motor operating mode wherein the combustion of the internal combustion engine 3 is stopped and the electric motor is operated. An acquired rotational fluctuation MFCRMEN of the internal combustion engine is corrected by a correction value KCRREFX (a step 2), the misfire of the internal combustion engine 3 is determined based on the corrected rotational fluctuation MFCRMEN of the internal combustion engine (a step 3), and it is determined whether or not the hybrid power plant is in the electric motor operating mode (a step 21). When the electric motor operating mode is determined, a correction value KCRREFX is calculated (steps 33, 39, steps 57 to 60 shown in Fig. 5, and Fig. 6 (not shown)). <P>COPYRIGHT: (C)2006,JPO&NCIPI |
