Patent ID: 9745930
Date: 2017-08-29
CPC Classifications: F02D,F02M,H01L,Y10T

Claim:
1. A method for repolarizing a piezoelectric actuator of an injector of an internal combustion engine of a used vehicle, said piezoelectric actuator having undergone initial polarization before the vehicle was put into use, characterized in that the method comprises the following steps, the piezoelectric actuator being associated with the injector, and the injector being mounted on the engine, the engine being stopped: ensuring that a residual injector fuel supply pressure is less than a specified threshold below which no injection of fuel into the combustion chamber can take place; applying a first polarization voltage (V stopping the application of the first polarization voltage (V applying a second polarization voltage (V stopping the application of the second polarization voltage (V said first (T