Method for drift detection and compensation of injectors for injecting fuel into combustion chambers of internal combustion engine, involves sampling signal characterizing rail pressure, and detecting characteristic vector

摘要

The method involves sampling a signal characterizing a rail pressure. A time-discrete signal is transformed into a frequency chamber. A characteristic extraction is carried out from a frequency spectrum. A characteristic vector is detected and compared with a corresponding stored characteristic vector determined previously. The functioning of an injector (131) is characterized accordingly. A deviation of the injected quantity is suggested due to falsely designed injector. Independent claims are included for the following: (1) a computer program; and (2) a computer program product with a program code.