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

摘要

The invention relates to a method for cooling a dosing unit (250) pertaining to SCR systems for exhaust cleaning, comprising the steps, after cessation of exhaust flow, of cooling a reducing agent dosing unit (250) by means of reducing agent supplied to it, and of intermittently running a feed device (230) to supply said coolant reducing agent, and running said feed device (230) at reduced power compared with ordinary operation. The invention relates also to a computer programme product containing programme code (P) for a computer (200; 210) for implementing a method according to the invention. The invention relates also to an SCR system and a motor vehicle (100; 110) which is equipped with the SCR system.