METHOD FOR OPERATING OF A DOSING SYSTEM FOR SOLUTION OF REDUCING AGENT OF A SCR CATALYTIC CONVERTER IN THE EXHAUST GAS SYSTEM OF AN INTERNAL COMBUSTION ENGINE

摘要

The present invention relates to a method of operating a metering supply system for a reducing agent solution of an SCR catalytic converter (11) in an exhaust gas system (10) of an internal combustion engine, said metering supply system being connected to a coolant circuit (30) It comprises one or more chillable metering modules (20). The cooling of the metering supply module 20 is performed according to the requirement of the cooling capacity of the coolant circuit 30 . According to the present invention, the temperature of the coolant is taken into account when the cooling capacity is required, and the temperature of the coolant is determined on the basis of a model in the region of entry into the metering supply module 20 . Into the model, one or more information regarding the temperature of the coolant remote from the metering and supplying module 20 and one or more information regarding the temperature in the region of the metering and feeding module 20 are introduced.