Method for real-time determination of fuel injector flow characteristic

The invention relates to a real-time for determining fuel injector rate and method. The invention claims a method of the step: Arranged at least injector (2) increasing is equal to the theory increasing or the renewal, increasingHalf of each adjusting spray of multi-spraying, at least comprising a standard spray cleaning, wherein grid spraying is provided with a base for storing the curve of the injection control duration of engine control unit (5) and; and multi-spraying comprising a injection control duration at least two continuous a series of spraying, is a purpose of spraying with the standard spray same fuel according hold-up, halfFuel hold-up difference between the determined standard spray and; multi-sprayingThe infers determining the error of the fuel hold-up difference; A initial the curve the gain and/or the displacement of range of linear, or a modifying of the curve a misalignment areas at least surface or a mathematical relation, compensating; errorsAnd storing determined so the new curve. The invention can the spraying for internal combustion engine based on injection control duration fuel injector rate and real-time determining.