Patent ID: 7877983
Filing Date: 2011-02-01
Classification: B01F,F01N,Y02T

Abstract:
1. An arrangement for supplying a urea solution to an exhaust line of a combustion engine that contains a catalyst for catalyzing ammonia in the exhaust line, the arrangement comprising: an element defined by at least a first wall surface forming a first exhaust passage, the element being a wall element of a spiral exhaust line and dividing a portion of the spiral exhaust line into a first exhaust passage and a second exhaust passage; a dosing device including a spray nozzle operable to spray the urea solution into the first exhaust passage, to the exclusion of spraying urea into the second exhaust passage; a heating system including the second exhaust passage bounded by a second wall surface situated close to the first wall surface and operable to supply heat to the first wall surface, a first wall surface operable to maintain a degree of heating of the first wall surface so that the first wall surface is at a higher temperature than a vaporization point of the urea solution when the liquid urea solution in a liquid form is supplied in the first exhaust passage by the dosing device.