DEVICE OF INTERNAL COMBUSTION ENGINE FUEL PROPERTIES DETERMINING Russian patent published in 2017 - IPC F02D41/34 F02D45/00 F02P5/04 

FIELD: engines.

SUBSTANCE: invention relates to internal combustion engine fuel properties determining device. Disclosed isdevice for engine with electronic control unit (ECU), which is configured for (i) feedback control, wherein engine speed is reduced to preset speed during ignition advance correction at feedback control, (ii) determination of fuel properties whether it is heavy fuel, when ignition performance coefficient is equal to or exceeds preset threshold value during preset time interval after engine starting, wherein ignition performance coefficient is ratio of ignition advance correction value to maximum range of ignition correction, where ignition correction maximum range is correction range maximum value, in which ignition advance is corrected during feedback control, and (iii) setting threshold value equal to value, which depends on engine temperature characteristic value, where temperature characteristic value is correlated with engine temperature.

EFFECT: technical result is more accurate determination of whether fuel supplied to engine, is heavy fuel, even at low temperatures.

5 cl, 6 dwg