Patent ID: 8151561

Claim:
A multi-cylinder internal combustion engine, comprising: a first exhaust gas manifold section ( 3 ), wherein exhaust gas outlets ( 2 ) of a first portion of the cylinders of the engine communicate only with said first exhaust gas manifold section ( 3 ); a second exhaust gas manifold section ( 4 ), wherein exhaust gas outlets ( 2 ) of a remaining portion of the cylinders of the engine communicate only with said second exhaust gas manifold section ( 4 ); an oxidation catalytic converter ( 7 ) disposed in said first exhaust gas manifold section, wherein nitric oxide contained in exhaust gas that flows through is adapted to be converted via said oxidation catalytic converter ( 7 ) into nitrogen dioxide; a hydrolysis catalytic converter ( 8 ) disposed in said second exhaust gas manifold section ( 4 ), wherein downstream of said oxidation catalytic converter ( 7 ) and said hydrolysis catalytic converter ( 8 ) said first and second exhaust gas manifold sections ( 3 , 4 ) discharge into a common main exhaust gas manifold ( 9 ); at least one SCR catalytic converter ( 10 ) disposed in said main exhaust gas manifold ( 9 ); and means ( 11 , 12 , 13 ) for introducing a reduction agent into said second exhaust gas manifold section ( 4 ) upstream of said hydrolysis catalytic converter ( 8 ), wherein ammonia is adapted to be produced from said reduction agent via said hydrolysis catalytic converter, wherein said reduction agent is an aqueous urea solution, and wherein a flow mixer ( 14 ) is disposed upstream of said hydrolysis catalytic converter ( 8 ) in said second exhaust gas manifold section ( 4 ), wherein an evaporator or a heating device ( 15 ) is disposed in said second exhaust gas manifold section ( 4 ) upstream of said hydrolysis catalytic converter ( 8 ) and upstream of said flow mixer ( 14 ) for accelerating evaporation of said introduced reduction agent in said second exhaust gas manifold section ( 4 ).