Patent ID: 7093586
Filing Date: 2006-08-22
Classification: F02D,F02M,Y02T

Abstract:
1. A method for controlling a fuel metering system of an internal combustion engine, wherein an activation duration of at least one electrically operated injector to determines a fuel quantity to be injected, the method comprising: performing a null quantity correction, wherein the null quantity correction includes determining a minimum activation duration during which a minimum quantity of fuel is injected, wherein the determination of the minimum activation duration includes adjusting an activation duration from an initial value, and wherein an activation duration in which a change in a characteristic signal appears is selected as the minimum activation duration; and determining activation durations at a plurality of test points of a quantity characteristics map of the injector, based on the null quantity correction and at least one of: a) at least one transfer function that characterizes a relationship between the minimum activation durations and activation durations at the plurality of test points; and b) at least one transfer function that characterizes a relationship between the activation durations at the plurality of test points.