scr system, control strategy and procedure for cooling of endoseringsenhet at such a scr system

摘要

A method for cooling a dosing unit (250) pertaining to an SCR system for exhaust cleaning: after cessation of exhaust flow, cooling a reducing agent dosing unit (250) by reducing agent supplied to the unit. Intermittently running a feed device (230) to supply reducing agent, and running the feed device (230) at reduced power compared with its ordinary operation. Also a computer programme product containing programme code (P) for a computer (200; 210) for implementing the method. Also an SCR system and a motor vehicle (100; 110) which is equipped with the SCR system are disclosed