Method for verifying the plausibility of a measuring device for determining the quality of an aqueous urea solution in a reservoir of an SCR catalyst system

摘要

A method for verifying the plausibility of a measuring device for determining a quality of an aqueous urea solution in a reservoir of an SCR catalyst system comprises determining whether a filling of the reservoir has taken place, determining the quality of the aqueous urea solution in the reservoir and detecting whether an error of the measuring device is present or whether the reservoir was filled with an aqueous urea solution, the quality of which deviates from a default value consisting of a filling status of the reservoir and the quality of the aqueous urea solution in said reservoir.

主权项

1. A method for verifying the plausibility of a measuring device for determining a quality of an aqueous urea solution in a reservoir (100) of an SCR catalyst system, the method comprising:
determining whether contents of the reservoir relate to an aqueous urea solution, determining whether a filling of the reservoir has taken place, detecting an error of the measuring device is present when contents of the reservoir do not relate to an aqueous urea solution and the reservoir was not filled, and when the contents of the reservoir relate to an aqueous urea solution, determining whether the quality of the aqueous urea solution in the reservoir deviates from a predetermined value.