Combustion parameters estimation based on multi-channel vibration acceleration signals

Knock recognition based on vibration signal and Wiebe function in a heavy-duty spark ignited engine fueled with Methane

“…From the knock sensor signals the EOC is estimated as presented in [33], where the signal is denoised with a lowpass filter in order to remove high frequencies. An example is shown in Figure 12, where the denoise knock sensor signal is shown.…”

“…An example is shown in Figure 12, where the denoise knock sensor signal is shown. In [33], the end of combustion is correlated with the fourth maximum, starting from the first peak. The low-pass filtered knock sensor signal from A and C is represented in Figure 13, where in blue the mean MFB of the data-set is represented and in dashed red line the average angle of the CA90 is also highlighted.…”