METHOD AND DEVICE PERTAINING TO COOLING OF DOSING UNITS OF SCR SYSTEMS

摘要

The invention relates to a method pertaining to SCR systems which comprise a dosing unit (250) to supply reducing agent to an exhaust duct (240) for exhaust cleaning, and a container for reducing agent, comprising the step of choosing (s310; s340) a limit level for reducing agent in said container (205). The method comprises also the steps of determining (s320) a cooling requirement of said dosing unit (250) and choosing (s340) a limit level for reducing agent in said container (205) on the basis of said cooling requirement. The invention relates also to a computer programme product containing programme code (P) for a computer (200; 210; 400) for implementing a method according to the invention. The invention relates also to a device of an SCR system which comprises a dosing unit (250) to supply reducing agent to an exhaust duct (240) for exhaust cleaning, and a motor vehicle (100) which is equipped with the device.