Patent ID: 7124020
Filing Date: 2006-10-17
Classification: F02B,F02D,G01L

Abstract:
1. A system for calibrating apparatus for acquiring the pressure in a cylinder of a motor vehicle diesel engine, comprising a cylinder pressure sensor associated with the cylinder and means for conditioning a signal delivered by the sensor as a function of conditioning parameters, which calibration system comprises: means for collecting the signal delivered by the cylinder pressure sensor; an information processing unit adapted to determine the values of the conditioning parameters as a function of a polytropic thermodynamic model of the evolution of the pressure in the cylinder, a predetermined reference pressure of a pure compression phase of the cycle of the cylinder, and the signal delivered by the pressure sensor and collected by the collecting means; and means for modifying the values of the conditioning parameters as a function of the values of the conditioning parameters determined by the information processing units, wherein the information processing unit comprises determination means adapted to determine the value of the conditioning parameters as a function of pressure values in the combustion chamber of a pure compression polytropic model of the cycle of the cylinder from the equation: in which θ is a value of the crankshaft angle of the cylinder, V