Method for processing a sensor signal of a knocking sensor for an internal combustion engine
AssigneeSiemens Aktiengesellschaft
InventorFrederic Galtier
Life of this patent
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Abstract
Method for processing a sensor signal of a knocking sensor for an internal combustion engine, having the following steps: a time window is defined for the evaluation of the sensor signal as a function of the operating state and/or the operating behavior of the internal combustion engine, a plurality of sampled values of the sensor signal are sampled within the predefined time window with a predefined sampling frequency, and an output signal which represents the knocking behavior of the internal combustion engine is determined from the sampled values, the Fourier transform of the sampled values being calculated in order to determine the output signal.
Claims16
A method for processing a sensor signal of a knocking sensor for an internal combustion engine having the following steps:
- a time window for evaluating the sensor signal is defined as a function of the operating state and/or the operating behavior of the internal combustion engine,
- a plurality of sampled values of the sensor signal are sampled within the predefined time window with a predefined sampling frequency,
- an output signal which represents the knocking behavior of the internal combustion engine is determined from the sampled values, the Fourier transform of the sampled values being calculated in order to determine the output signal, wherein, before a normal operation, the sampling frequency is adapted, in an adjustment procedure, to the frequency range of the knocking signal of the internal combustion engine, and wherein during the setting procedure the output signal is calculated for various values of the sampling frequency and during the normal operation the sampling frequency is set to the value at which the output signal is at a maximum.
A method for processing a sensor signal of a knocking sensor for an internal combustion engine having the following steps:
- defining a time window for evaluating the sensor signal,
- sampling a plurality of sampled values of the sensor signal within the predefined time window with a predefined sampling frequency,
- calculating the Fourier transform of the sampled values in order to determine an output signal,
- evaluating the Fourier transform wherein a new sampling frequency is determined according to the evaluated Fourier transform.
Dependencies are inferred from the claim text.