Nitrogen oxides reduction agent injection arrangement

A nitrogen oxides reduction agent injection arrangement for injecting a nitrogen oxides reduction agent into an exhaust conduit forming part of an exhaust system for an internal combustion engine system, comprising:

• a plurality of nozzles adapted to be evenly distributed around a circumference of the exhaust conduit, wherein the exhaust conduit has a cross section with a cross sectional center and wherein each nozzle of the plurality of nozzles is adapted to inject the nitrogen oxides reduction agent towards the cross sectional center;
• a source of the nitrogen oxides reduction agent and a single dosing unit for controlling a flow of the nitrogen oxides reduction agent from the source of the nitrogen oxides reduction agent to a nozzle opening of each one of the plurality of nozzles;
• each nozzle being adapted to inject the nitrogen oxides reduction agent into an interior of the exhaust conduit via the nozzle opening of each nozzle, each nozzle comprising a nozzle opening control portion made of a shape memory material whereby a size and/or a shape of the nozzle opening is dependent on at least a temperature of the nozzle opening control portion;
• each nozzle comprising a heating element at least thermally connected to the nozzle opening control portion;
• a sensor for sensing exhaust gas information indicative of at least one of the following:
• a temperature, a mixing pressure, and a flow speed, of an exhaust gas in the exhaust conduit upstream of the plurality of nozzle;
• and
• a control unit adapted to receive the exhaust gas information and to control a heating of the heating elements in response to the exhaust gas information.