Method for acquisition and processing of an intake pressure signal in an internal combustion engine without an intake manifold

Abstract

Method of acquisition and processing of an intake pressure signal in an internal combustion engine without an intake manifold; the internal combustion engine having at least one cylinder that receives fresh air through an intake duct, which is controlled by a butterfly valve and is provided with a pressure sensor connected to an electronic control unit. The acquisition and processing method provides for the following steps: measuring, via the pressure sensor, the instantaneous induction pressure at a plurality of different crank angles distributed over an engine cycle; storing, during each engine cycle, the instantaneous induction pressures in a fast acquisition buffer of the electronic control unit; and determining, at the end of each engine cycle, the mean induction pressure in the engine cycle by calculating a mean of the instantaneous induction pressures previously stored in the fast acquisition buffer of the electronic control unit.