Patent ID: 6498418
Filing Date: 2002-12-24
Classification: F02D

Abstract:
Fuel injection system with a piezoelectric element (10, 20, 30, 40, 50 or 60) for controlling an amount of injected fuel, by charging and/or discharging the piezoelectric element (10, 20, 30, 40, 50 or 60) using a driving circuitry, characterized in thatthe fuel injection system comprises a current diagnosis unit capable of detecting a fault of a current flowing in the driving circuitry within 10 &mgr;sec of the fault occurring, and in that the current diagnosis unit detects the fault by detecting an input current flowing into the piezoelectric element (10, 20, 30, 40, 50 or 60) and an output current flowing out of the piezoelectric element (10, 20, 30, 40, 50 or 60).