A method for determining at least one rail pressure-closing flow value pair for a pressure control valve of a common rail injection system

摘要

A method for determining at least one rail pressure closing current value pair (P / I) for a pressure regulating valve (112) of a common rail injection system (100) of an internal combustion engine (116) comprising the steps of: operating (201) the common rail injection system in an ZME control operation, lowering (203) the drive current (I) for the pressure control valve (112), detecting (204) the time pressure curve (302) in the common rail (108) and determining the rail pressure (P), determining (204 ) of the closing flow (I) on the basis of the detected pressure curve (302), assigning (205) of the determined rail pressure (P) and the determined closing flow (I) to a rail pressure closing current value pair (P / I), wherein the lowering of the drive current ( I) for the pressure control valve (112) comprises a modulated lowering (202) of the average drive current.