Patent ID: 7801691
Filing Date: 2010-09-21
Classification: F02D

Abstract:
1. Method for the acquisition and processing of an intake pressure signal in an internal combustion engine including at least two cylinders, each of which receives fresh air through an intake port, 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 comprising the steps of: measuring, via the pressure sensor, the instantaneous induction pressure at a plurality of different crank angles distributed over an engine cycle, estimating the mean induction pressure in an engine cycle, calculating an average of the instantaneous induction pressures measured during the engine cycle; storing, during each engine cycle, the instantaneous induction pressures in a fast acquisition buffer of the electronic control unit; determining, at the end of each engine cycle, the mean induction pressure in the engine cycle by calculating an average of the instantaneous induction pressures previously stored in the fast acquisition buffer of the electronic control unit; and determining alternately the mean intake pressures of the two cylinders, such that the mean intake pressure of a cylinder is determined during one engine cycle and the mean intake pressure of the other cylinder is determined in the next engine cycle.