DIAGNOSTICS METHOD OF STATE OF FUEL FEED SYSTEM OF ENGINE Russian patent published in 2013 - IPC F02D41/00 F02D41/18 F02D41/22 F02D41/40 

FIELD: engines and pumps.

SUBSTANCE: object of this invention is a diagnostics method of the state of a fuel feed system of internal combustion engine (1) with controlled ignition and with fuel spray, which contains electronic control device (6) using oxygen sensor (8) for control in a closed loop of the value of air/fuel ratio in the mixture supplied to combustion chambers of the above engine (1), according to which a signal supplied with the above oxygen sensor (8) is analysed; at that, a) spray time correction factor ALPHACL_MOYEN is derived from the above signal, by means of which saturation of exhaust gas at engine (1) outlet is controlled, b) ALPHACL_MOYEN is compared to the pre-determined threshold values: minimum SEUIL_MIN and maximum SEUIL_MAX; c) malfunction state is stated when ALPHACL_MOYEN is beyond the interval concluded between SEUIL_MIN and SEUIL_MAX.

EFFECT: improving operating efficiency of the internal combustion engine; reducing the quantity of pollutants at the outlet header outlet of the transport vehicle.

7 cl, 8 dwg