CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE Russian patent published in 2017 - IPC F02D41/22 F02D45/00 F01N11/00 

FIELD: engines and pumps.

SUBSTANCE: invention refers to the control device for an internal combustion engine, particularly, to troubleshooting. The control device for an internal combustion engine with an air-fuel ratio gauge and a control unit of supplied electric potential to the air-fuel ratio gauge. The device performs control of a fuel supply cut-off for stopping fuel supply into the combustion chamber and troubleshooting control for the purpose of failure diagnostics in the air-fuel ratio gauge based on a current output signal of the air-fuel ratio gauge after completion of control of the fuel supply cut-off. The air-fuel ratio gauge is performed so that its output current increases, when the determined air-fuel ratio of exhaust gases increases and the maximum value of the output current increases, when electric potential supplied to the air-fuel ratio gauge increases. The control unit of supplied electric potential makes electric potential supplied to the air-fuel ratio gauge equal to that of the fuel supply cut-off and different to normal electric potential, which is supplied, when the control of the fuel supply cut-off is not performed, during performing of control of the fuel supply cut-off, and until completion of troubleshooting control after completion of control of the fuel supply cut-off, and changes electric potential supplied to the air-fuel ratio gauge from electric potential of the fuel supply cut-off to normal one after completion of troubleshooting control.

EFFECT: invention allows controlling wear troubleshooting for diagnostics of operation performance reduction of the air-fuel ratio gauge.

13 cl, 13 dwg