Method for controlling a piezoelectric fuel injector of an internal combustion engine of a vehicle comprising a step for polarizing the piezoelectric actuator

摘要

Method for controlling a fuel injector with a piezoelectric actuator acting on a valve element, including the following steps, in the normal operation of the vehicle:(200): Estimating an engine parameter (Pj_EST), representative of an actual play (J_REEL) between the piezoelectric actuator and the valve element,(300): Comparing the engine parameter with the equivalent parameter (Pj_ECU) representative of the original play (J_INIT): if the engine parameter differs from the equivalent parameter in such a way that the actual play is greater than the original play: Applying an electrical polarization charge to the piezoelectric actuator, in order to polarize the piezoelectric actuator during the injection of the fuel,Commanding the closure of the injector.