| 摘要 |
For the intermittent operation a correction is carried out over the change of the catalyst charge, e.g. determined from the injection amount, gas pedal adjustment or manifold pressure change and/or from exhaust gas temperature changes and/or from NOx concentration changes, either from a performance graph or from sensors. Process for adding a reductant to an internal combustion engine exhaust gas containing nitrogen oxides spatially to the exhaust gas line before a catalyst system comprises drawing up engine-specific values for the NOx concentration and exhaust gas amount determined in connection with a reference internal combustion engine and the temperature of the exhaust gas sensed during engine operation, and calculating a reductant rate using these parameters. This reductant rate is subjected to a (high) dynamic correction depending on load changes on the engine and a corresponding reductant amount is fed to the exhaust gas stream. For the intermittent operation a correction is carried out over the change of the catalyst charge, e.g. determined from the injection amount, gas pedal adjustment or manifold pressure change and/or from exhaust gas temperature changes and/or from NOx concentration changes, either from a performance graph or from sensors.
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