Patent ID: 6691682
Filing Date: 2004-02-17
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 piezoeleotric element (10, 20, 30, 40, 50 or 60), characterized in that an optimization unit provides online control of an activation voltage value for charging or discharging the piezoelectric element (10, 20, 30, 40, 50 or 60), wherein the optimization unit adjusts the value of an activation voltage or voltage gradient as a function of operating characteristics of the piezoelectric element (10, 20, 30, 40, 50 or 60); andcharacterized in that the optimization unit adjusts the value of the activation voltage or voltage gradient by increments and verifies correctness of the increment as a function of injected fuel volume.