Selective catalytic reduction arrangement for reducing nitrogen oxides in exhaust gas of vehicle, has flow controller for controlling coolant flow rate of coolant circuit and dosing module for introducing reducing agent into exhaust system

摘要

The arrangement (20) comprises a dosing module (22) for introducing a reducing agent into an exhaust gas-carrying exhaust system (10). The dosing module is cooled by a coolant circuit (23). A flow controller (24) is provided for controlling a coolant flow rate of the coolant circuit. A supply line of the coolant circuit upstream from the dosing module and a return line (23b) of the coolant circuit downstream from the dosing module. The flow controller is provided for controlling the flow of the coolant inflow line (23a) or the return line.