Method for determining an indicated actual engine torque for an internal combustion engine, using Fourier analysis to calculate appropriate Fourier coefficients from a signal for crankshaft speed

摘要

An engine speed signal (22) is derived from an internal combustion engine (46) and subjected to Fourier analysis (48) to produce characteristics (50) in the form of first-order Fourier components that are passed along with other engine parameters, e.g. manifold passage pressure (52), to a neuronal network (54) that calculates indicated average pressure. Rotary speed of a crankshaft is scanned via a crankshaft angle to produce a signal for crankshaft speed. The indicated actual engine torque is calculated from the Fourier coefficients.