Abgasreinigungssystem mit verzögerter Meßwerterfassung

摘要

The invention relates to a device and a method for determining the pollutant concentration of an exhaust gas at a first point (5) of an exhaust-gas system in an internal combustion engine (2). According to said method, a sensor (4) for determining the pollutant concentration is placed at a second point (6), downstream (3) of the first point (5) in the exhaust-gas system. Said sensor records a measured value, which is then transmitted to a chronological member (7), the latter (7) taking into consideration the time delay between a recording of a measured value at the first point (5) and a recording at the second point (6) and transmitting the measured value to a diagnostic unit (8), whereby said measured value is chronologically correlated with other, non-deferred measured values. Sensitive gas sensors can thus be placed at cooler points of the exhaust-gas system that are less exposed to vibration and can nevertheless determine the pollutant concentration at another point.