Patent ID: 7974768

Claim:
A device for controlling an internal combustion engine, comprising: means for generating a signal for controlling the internal combustion engine; a sensor to supply a measured pressure signal for pressure measured in a measured combustion chamber of the internal combustion engine; and a filtering device to generate a filtered pressure signal, the filtering device including analog electronic components, wherein the filtering device has a closed-loop configuration with a direct part and a return part, the return part comprising a reinjection module to reinject the filtered pressure signal and the direct part of the closed-loop comprising: a first subtractor module generating a difference between the measured pressure signal and an output from the reinjection module, a nonlinear module at the output side of the first subtractor module to attenuate low-amplitude fluctuations contained in an output of the first subtractor module, and an integrator module generating the filtered pressure signal by integrating an output of the nonlinear module.