Continental Automotive Gmbh

Continental Automotive France

Vb-trade

Christophe Duchemin

Guerric Panis

A method for processing a voltage signal relating to the pressure prevailing in a combustion chamber of a cylinder of an internal combustion engine, the signal, referred to as an 'input signal', having, in alternation, 'plateau' phases and main peak phases. The method includes a step (E) of rectification of the input signal such that the gradient of the base signal is zero, a step (E) in which the peaks of the rectified signal of which the amplitude is greater than a predetermined voltage value are clipped so as to obtain an at least partially clipped signal referred to as a 'clipped signal', a step (E) of detection of a main peak when the amplitude of the input signal is greater than the amplitude of the clipped signal, and a step (E_, E_) of compensation of the input signal in the absence of such a detection.

Method for processing a voltage signal relating to the pressure prevailing in a combustion chamber of a cylinder of an internal combustion engine

Disclosed is a method of processing a periodic voltage signal, called the input signal, relating to the pressure existing in a combustion chamber of a cylinder of an internal combustion engine. The method includes a step (E) of determining a second instant of unlocking of the base signal during a second peak phase, a step (E) of determining a second instant of locking, which is subsequent to the second instant of unlocking and for which the input signal is in the plateau phase consecutive to the second peak phase, and a step (E) of generating a base signal between the second instant of unlocking and the second instant of locking on the basis of a slope value of a straight line determined during a first peak phase between a first instant of unlocking and a first instant of locking.

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Toulouse, France

Christophe Duchemin