| 摘要 |
The invention relates to a method and a device for detection of oxidizable materials in the exhaust gas outlet of a combustion engine, by means of a measuring device comprising at least one measuring bridge with at least two sensors (D, R) which are arranged in said exhaust outlet, the measuring bridge being exposed to an electrical operating voltage and one of the sensors forming an active sensor (D) by burning said oxidizable materials on its surface which is heated by the resistance, and thereby increasing its temperature-dependent resistance, the other sensor (R) serving as a reference by changing the resistance similar to the active sensor depending on similar environmental parameters without increasing its temperature by the presence of combustible materials, whereby oxidizable materials are detected by measuring voltage variations in the measuring bridge. According to the invention, a flow of air can be delivered to the exhaust gas outlet upstream of the position of the active sensor (D). |
