INTERNAL COMBUSTION ENGINE CONTROL SYSTEM Russian patent published in 2017 - IPC F02D45/00 

FIELD: engines.

SUBSTANCE: invention relates to internal combustion engine control system, which controls internal combustion engine by air-fuel ratio sensor output signal. Result is achieved by fact, that air-fuel ratio sensor is made so, that supplied voltage, at which output current reaches zero, varies according to air-fuel ratio and output current increases, if supplied voltage at air-fuel ratio sensor is increasing, when exhaust gas air-fuel ratio is stoichiometric air-fuel ratio. When exhaust gas air-fuel ratio shall be determined by air-fuel ratio sensor, supplied voltage at air-fuel ratio sensor is fixed to constant voltage, wherein said direct voltage differs from voltage, at which output current reaches zero, when exhaust air-fuel ratio represents stoichiometric air-fuel ratio, and represents voltage, at which output current reaches zero, when exhaust air-fuel ratio differs from stoichiometric air-fuel ratio. Thus, internal combustion engine control system uses air-fuel ratio sensor, capable to determine absolute value for exhaust gas air-fuel ratio, even if exhaust gas air-fuel ratio is not stoichiometric air-fuel ratio.

EFFECT: technical result is creation of internal combustion engine control system, in which air-fuel ratio sensor is used, capable to determine exhaust gas air-fuel ratio absolute value, even in cases, when air-fuel ratio is not stoichiometric.

22 cl, 20 dwg