Injected fuel actual amount variation determining method for road vehicle, involves injecting actual injected fuel amount and determining variation from comparison between reference amounts, which are formed by two of injection samples

摘要

The method involves injecting an actual injected fuel amount required in a preset operating point in an internal combustion engine (10) for different combustion processes with different injecting samples. A variation is determined from a comparison between reference amounts, which are formed by two of the samples, where the two injection samples have preset numbers of individual injections, respectively, and the preset numbers of injections are greater than one and are not equal. The operating point is defined by a constant value of engine speed and torque moment.