CONTROL SYSTEM AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE Russian patent published in 2017 - IPC G01N27/407 

FIELD: engines and pumps.

SUBSTANCE: control system for internal combustion engine comprises a sensor based on a limit current, the control system comprises an electronic control unit configured for performing scanning with gradual decrease of voltage applied to the sensor from the first voltage (V1) to the second voltage (V2); receiving the critical value (Ip) of sensor output current during the execution of the scanning process from the sensor output currents, while the voltage of a certain range is applied to the sensor. The critical value is predicted basing on the output signal; and determination of SOx concentration in exhaust gases is based on said critical value and the basic value, said basic value is the value of sensor limit current with the value of the sensor limit current corresponding to the concentration of oxygen having a constant value.

EFFECT: providing accurate determination of sulphur oxides concentration in exhaust gases of the engine.

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