Method for estimating the rotation speed of a vehicle engine

摘要

The method involves acquiring an electric network signal of a vehicle, where the signal has an alternator and an electrical energy storage unit. The harmonic frequency of the acquired signal representing engine speed is determined. The engine speed is estimated according to the determined frequency, where the engine speed is represented by number of revolutions per minute. An independent claim is also included for a system for estimating rotation speed of an internal combustion engine connected to electrical network of a vehicle, implementing method for estimating rotation speed.