| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately determine the misfire of an internal combustion engine in a power output device having a transmission means connected to an electric motor and a drive shaft. <P>SOLUTION: When the shift stage of a transmission is Lo, a first threshold A1 and a second threshold for determining the misfire of the engine are set (S220, S280), and the misfire is determined based on the 360° difference Δ360 obtained using the 30° required time T30 calculated as the time required for the 30° rotation of a crankshaft and the first threshold A1 and the second threshold (S230, S290). When the shift stage of the transmission is Hi, a first threshold A2 determined to have a tendency to be smaller than the first threshold A1 and a second threshold are set (S330, S390), and the misfire is determined (S340, S400). Like this, the misfire is determined considering the effects of the driving states of a motor MG2, the transmission, and a planetary gear mechanism on the crankshaft of the engine according to the state of the shift stage. <P>COPYRIGHT: (C)2007,JPO&INPIT |
