Method and apparatus for starter motor diagnosis and prognosis using a parameter estimation algorithm

摘要

A method for determining the state of operation of a starter motor in a vehicle, the method comprising: determining a starter motor current I; determining a starter motor voltage V; determining an engine speed ω; determining a starter motor resistance Rals sum a starter motor armature resistance around a starter motor brush resistance R; determining a starter motor voltage Armature inductance Lals inductance of an armature coil I; determining a back emf motor constant Eals the product of ω, the back EMF motor constant K, and a gear ratio T between a starter motor shaft and the machine shaft; defining the current and voltage behavior of the starter motor in the form of a time model as defining model parameters p, p and p from the time model as where Δt is the sampling time; determining the engine parameters R, Kund Lals based on a regression model based on the time model; determining a deviation using the re-determined ones n motor parameters; andcomparing the deviation with an error threshold for determining the functional state of the starter motor.