PROCEDE DE DETERMINATION DE LA PRESSION REGNANT DANS LA RAMPE D'INJECTION DE CARBURANT D'UN MOTEUR A COMBUSTION INTERNE ET DISPOSITIF CORRESPONDANT

摘要

The invention concerns a method for determining the pressure prevailing in an internal combustion engine fuel injection ramp. Said method consists in particular in: (a) supplying the booster pump (11) with fuel such that the injection ramp is supplied with fuel at boost pressure; (b) measuring the pressure prevailing in the injection ramp (14) by means of a pressure sensor (18) when the fuel is at boost pressure; (c) deducing therefrom the error percentage (e) of the pressure sensor, and storing said error; (d) producing a linear decrease law of said error between the boost pressure and the threshold of the sensor maximum effective range; and (e) deducing therefrom for each pressure value measured by the sensor between the boost pressure and the pressure threshold, the real fuel pressure value in the injection ramp, to correct the injected fuel volume.