Patent ID: 8534049

Claim:
A device comprising at least one control unit with computer-executable instructions stored thereon, the computer-executable instructions for operating an electromagnetically operated metering valve that is impinged with a metering signal, wherein the metering signal determines the metering of a reagent or a precursor of a reagent that is to be injected into an exhaust gas area of a combustion engine, wherein the computer-executable instructions cause the control unit that executes the instructions to: open the metering valve to meter reagent into the exhaust gas area; detect the reagent pressure at an opened metering valve that indicates a reagent flow, wherein the detection occurs at time intervals during a default cycle via a summation; add the reagent flow over the opening time of the valve for determining an actual metering amount; determine the opening time of the valve by a direct controlling of the valve by a time signal; and select the default cycle such that a cycle duration of a cycle signal is shorter than the opening time of the valve.