| 摘要 |
<p>A device (2) adapted to being used for sampling in the context of measuring the content of the exhaust gases in an exhaust flow (4) in an exhaust line (6) from a combustion engine comprises a sensor (8) situated in a measuring chamber (10). The device (2) further comprises at least two gathering tubes (12) situated in the exhaust pipe (6) and provided with apertures (14) which face towards the exhaust flow (4) and are situated in a plane (C,C) which is substantially perpendicular to the direction of the exhaust flow (4). The gathering tubes (12) are adapted to diverting various parts of the exhaust flow to the measuring chamber (10) to make it possible for the sensor (8) to monitor a mean value representing for example the NOx content of the exhaust gases. With a representative mean value for the NOx content of the exhaust gases an exhaust cleaning system based on SCR technology can be regulated with good accuracy.</p> |
