Pressure signal offset calibrating system for e.g. direct injection diesel engine of motor vehicle, has calibrating module with determining module determining displacement signal representing difference between pressure and filtered signals

摘要

The system has an electronic control unit (11) including a calibrating module (18) provided with an acquisition module (19) that acquires a pressure signal (P-brut) from a pressure measuring sensor (12) in a cylinder (3). A linear low-pass filtering module (20) filters the signal to obtain a filtered pressure signal (P-filt). The unit (18) has a determining module (21) that determines a displacement signal (Ecart-P) representing a difference between the pressure signal and the filtered pressure signal. An independent claim is also included for a method for calibrating an offset of a signal transmitted by a pressure measuring sensor arranged in a combustion chamber of a cylinder of an internal combustion engine.