Patent ID: 7578284

Claim:
An internal combustion engine controller comprising: a voltage booster circuit for boosting a battery voltage and outputting a boosted voltage; a first switching element disposed on an upstream side along a current direction of an injector, said first switching element flowing a current through said injector by using said boosted voltage; a second switching element disposed on the upstream side along a current direction of said injector, said second switching element flowing a current through said injector by using said battery voltage; a third switching element disposed on a downstream side along a current direction of said injector, said third switching element controlling a current flowing through said injector; a first resistor disposed between said third switching element and a power source ground terminal, said first resistor detecting a current flowing through said injector; a first diode for flowing a current from the downstream side to the upstream side of said injector; a second resistor for detecting a current flowing via said first diode; and a driver control unit for controlling and driving said first, second and third switching elements based on a current detected by said first resistor and/or said second resistor.