Patent ID: 7076359

Claim:
A method of producing at least one characteristic line of an air mass detecting device of an internal combustion engine with linking an output signal of the air mass detecting device with an air mass flow, comprising the steps of a) obtaining coarse signals of an error mass detecting device by placing the air mass detecting device at a different operational points of an internal combustion engine testing stand of an air mass flow, and detecting signals produced by the air mass detecting device; b) recalculating the coarse signals of the air mass detecting device into air mass flow values by interpolation of an output characteristic line; c) forming average values of the air mass flow values via integral multiple of a pulsation period for a corresponding operational point; d) calculating a deviation which corresponds to a deviation of the average air mass flow from a comparison air mass flow for a corresponding operational point; e) calculating a square norm through a matrix of the deviation; f) producing an adjusted characteristic line in the sense of optimization with respect to a condition that the square norm is minimal; g) recalculating the course signals of the air mass detecting device into air mass flow values by interpolation on the adjusted characteristic line; and h) iterating by repeating the steps g), c), d), e), and f).