Functionality testing method for catalyst in waste gas system of combustion engine, involves preparing catalyst by bringing reducing agent into catalyst, and oxygen uptake of catalyst is determined and compared

摘要

The method involves preparing a front catalyst (FK) by bringing a reducing agent quantity into the catalyst. The oxygen uptake of the catalyst is determined and compared with a pre-determined threshold value and if the determined oxygen uptake is smaller than pre-determined threshold value, the reducing agent is added with increased quantity. An independent claim is also included for a controller for testing the functionality of catalyst.