Patent ID: 10954839

Abstract:
The present invention relates to a method for correcting a supply of additive to an exhaust gas stream resulting from combustion in an internal combustion engine. A first aftertreatment component being arranged for oxidation of nitric oxide into nitrogen dioxide, and a reduction catalytic converter being arranged downstream said first aftertreatment component. Additive is supplied to said exhaust gas stream for reduction of nitrogen oxides in said reduction catalytic converter, the additive being supplied in proportion to an occurrence of nitrogen oxides in said exhaust gas stream, said proportion being subject to correction. The method includes: supplying unburned fuel to said exhaust gas stream upstream said first aftertreatment component to reduce oxidation of nitric oxide into nitrogen dioxide in said first aftertreatment component, and correcting said supply of additive to said exhaust gas stream when supplying unburned fuel to said exhaust gas stream.