METHOD FOR ENGINE (OPTIONS) AND ENGINE SYSTEM Russian patent published in 2018 - IPC F02P17/10 F02P17/12 F02P3/45 

FIELD: motors and pumps.

SUBSTANCE: invention relates to methods and systems for detecting and distinguishing carbon black formation due to soot accumulation on ignition spark plugs from carbon black formation due to fuel additives in internal combustion engines. In one example, the method may include distinguishing the formation of carbon deposits on spark plugs due to soot accumulation from the formation of carbon deposits on spark plugs due to the accumulation of fuel additives based on the current in the control wire of the spark plug followed by the use of the holding command. In addition, deterioration in the performance of the exhaust gas sensor and/or degradation of the exhaust gas catalytic converter can be determined based on the switching frequencies of one or more exhaust gas oxygen sensors and the type of formation of carbon deposits on spark plugs.

EFFECT: reduction and elimination of premature ignition.

20 cl, 7 dwg