Method of analysing the operation of a dosing pump for liquid, especially a fuel dosing pump for a vehicle heater

摘要

a method for analyzing the operation of a pump for liquid, in particular for a fahrzeugheizgeru00e4t brennstoffdosierpumpe the metering pump (20), or between two end points back and herbewegbaren plunger (26) and the associate.by connecting a voltage (u) during erregungszeitintervallen (ie) in respective arbeitstakten (ia) of the plunger (26) electrically erregbare drive unit (32) comprises, consists of the steps:- identify a startzeitpunktes (ts) of the movement of the plunger (26) as the first analysegru00f6u00dfe or / andidentify a endzeitpunktes (tan) of the movement of the plunger (26) as a second analysegru00f6u00dfe,comparison of at least one analysegru00f6u00dfe (ts, tan) with the assigned reference (tan)based on the vergleichsergebnis see at a fehlerzustandes available if the analysegru00f6u00dfe (ts, tan) from the reference (tan) diverges.