| 摘要 |
The invention relates to a method for dynamics monitoring of gas sensors of an internal combustion engine, wherein the gas sensors have a low-pass behaviour depending on geometry, measurement principle, ageing or contamination, wherein a dynamics diagnosis is performed on the basis of a comparison of a modelled (21) and a measured (22) signal in the event of a change to the gas state factor to be measured. According to the invention, the parameters of the low-pass behaviour are determined in a direction-dependent manner by means of the minimisation of direction-dependent error signals (31, 32, 34, 35), which are formed by high-pass filtering (23) and linking with direction-dependent saturation characteristic curves (26, 27, 28, 29), wherein the direction-dependent error signals are calculated by means of a comparison (30) of the modelled (21) and the measured (22) signal for an increasing and a decreasing signal component. The invention further relates to a corresponding device for performing the method. |
