Optimization of injection systems having piezoelectric elements by compensating for temperature dependence

摘要

The invention describes a fuel injection system with a piezoelectric element (10, 20, 30, 40, 50 or 60) for controlling the amount of injected fuel by charging and/or discharging the piezoelectric element (10, 20, 30, 40, 50 or 60), wherein the piezoelectric element is activated by an activation voltage, which is corrected for the piezoelectric element's temperature, the temperature being determined from the capacitance of the piezoelectric element. The capacitance of the piezoelectric element is a function of its temperature.