A method for controlling the injection quantity of a piezo injector of a fuel injection system

摘要

The invention relates to a method for controlling the injection quantity of a piezoelectric actuator by the piezoelectric actuator movable nozzle needle and a piezo injector having a fuel injection system. As a function of the instantaneous injection quantity is switched over between different control method. In a ballistic injector operation, a first control method is carried out, in which both a needle closing time point - equality as well as a needle flight time - equalization is carried out. In a full stroke injector operation, a second control method is carried out, in which a needle closing time point - equality, but no needle flight time - equalization is carried out.