| 摘要 |
PROBLEM TO BE SOLVED: To accurately detect faults in an electrical supercharger supercharging an internal combustion engine by an air pump driven by an electric motor. SOLUTION: A rotation number Nch of a current Im of an electric motor is calculated from the current Im and a voltage Vm of the electric motor driving the air pump (step S25), and the rotation speed Nch is compared with a target rotation speed Nobj (step S26). As a result, if an equation Nob-γ<=Nch<=Nobj+γis not established, at least one of the air pump or the electric motor is deemed to have broken down (step S28). Even of Nobj-γ<=Nch<=Nobj+γis established, if Pomh-δ<=Pch<=Pobj+δis not satisfied, as a result of comparing the supercharge pressure Pch with the target supercharge pressure Pobj (step S27), at least one of the air pump or the electric motor is deemed to be broken down.
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