| 摘要 |
In response to the on condition of an engine misfire identification switch SWj (step S110: No), the engine misfire identification device of the invention sets a maintenance-based engine misfire identification pattern and performs engine misfire identification across the whole operable range of an engine (step S120). When a frequency of system activation Nj since a last engine misfire identification is greater than a preset reference number Nref or when an elapsed time Tj since the last engine misfire identification is longer than a preset reference time Tref (step S130: Yes), the engine misfire identification device specifies a suitable engine misfire identification pattern based on the operating state of the engine and the state of charge SOC of a battery. The hybrid vehicle adopts a load-operation-state engine misfire identification pattern to identify a misfire in a load operation state of the engine in a range to a reference upper rotation speed Nmax, which is set according to the vehicle speed V (step S170), while adopting a motoring-state engine misfire identification pattern to identify a misfire in a motoring state of the engine in a range to the reference upper rotation speed Nmax, which is set according to the vehicle speed V (step S200) . This arrangement of the invention desirably enhances the frequency of engine misfire identification and ensures the engine misfire identification in a wide operation range of the engine. |
