Device for determining distribution of reducing agent ammonia in fluid stream in exhaust gas pipe of internal combustion engine of vehicle, has light source arranged outside pipe at light-transmitting area in angle around rotational axis

摘要

The device has a light source (2) which is arranged outside a pipe at the light-transmitting area (1) in an angle of 360 degree around a rotational axis lying in the symmetrical axis of the pipe. A detector (3) is rotatably arranged outside the pipe to the light-transmitting area In an angle of 360 degree around the rotational axis and is coupled with the light source, so that the angle between the connecting axis of the light source-detector and the connecting line of light source-rotational axis is varied in a predetermined angular area. Independent claims are included for the following: (1) a method for determining the distribution of a reducing agent in a fluid stream in an exhaust gas pipe; (2) a computer program for executing the distribution determining method; and (3) a computer program product with a program code.