DIAGNOSTICS METHOD OF STATE OF FUEL FEED SYSTEM OF ENGINE Russian patent published in 2013 - IPC F02D41/14 F02D41/18 F02D41/40 

FIELD: engines and pumps.

SUBSTANCE: invention refers to 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, according to which a signal supplied with the above oxygen sensor is analysed; at that, a) change of time of effective spray is derived from the above signal and saturation of exhaust gas at the engine outlet is controlled; b) CRITERE = ∫ (CRITERE1+CRITERE2+CRITERE3) is calculated; c) CRITERE is compared to the pre-determined threshold values, minimum SEUIL_MIN and maximum SEUIL_MAX; d) malfunction state is stated when CRITERE 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, 11 dwg