Patent attributes
A hybrid vehicle control unit performs diagnosis of a power generator using a target number of diagnoses during a trip period that extends from an ON state to an OFF state of an ignition key. For this, the control unit judges whether electricity is generated by the power generator from time to time. If no power is generated, it is judged whether the number of diagnoses which have been performed reaches the target number of diagnoses. If the target number of diagnoses is not reached, it is judged whether a diagnosis start condition appropriate for the diagnosis is satisfied. If yes, a gate arranged between a first inverter for controlling drive of the power generator and a power source is opened so that they are electrically connected. While keeping this state, a zero-torque control is executed to execute a diagnosis regarding the power generator.
