FIELD: motor vehicles industry.
SUBSTANCE: invention relates to the diagnosis of the degradation of an exhaust gas sensor in a motor vehicle. Method and system for identifying the condition of a malfunctioning oxygen sensor in the exhaust gas, located downstream of the catalytic converter in the exhaust system of the vehicle, is proposed. Method includes determining the ratio of the rate of change of the fractional oxidation state of the catalytic converter to the rate of change of the output voltage of the oxygen sensor. If this ratio is positive, a malfunction is diagnosed and, as a result, the engine is controlled without taking into account the feedback signal from the oxygen sensor.
EFFECT: increasing the efficiency and speed of diagnosing the malfunction of the exhaust gas sensor.
20 cl, 9 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD AND SYSTEM FOR DETERMINING ULTIMATE DEGRADATION LEVEL OF CATALYTIC NEUTRALISER (EMBODIMENTS) | 2015 |
|
RU2701626C2 |
| METHOD AND SYSTEM FOR DETECTING DEGRADATION OF OXYGEN SENSOR DUE TO RELEASE OF GAS FROM SEALANT | 2018 |
|
RU2698855C2 |
| METHOD (EMBODIMENTS) AND SYSTEM FOR CONTROLLING CATALYTIC NEUTRALISER WITH FEEDBACK | 2017 |
|
RU2704902C2 |
| METHOD OF DETECTING IMBALANCE OF AIR-FUEL RATIO IN ENGINE CYLINDERS | 2017 |
|
RU2719372C2 |
| METHOD AND SYSTEM FOR OPERATION OF ENGINE EXHAUST GAS CATALYTIC CONVERTER | 2018 |
|
RU2705291C2 |
| METHOD OF DETERMINING FAULTY FUEL INJECTOR IN ENGINE WITH DISENGAGED CYLINDERS | 2018 |
|
RU2717171C2 |
| METHOD FOR DETECTING IMBALANCE OF FUEL-AIR MIXTURE IN ENGINE CYLINDER (EMBODIMENTS) | 2015 |
|
RU2695237C2 |
| METHOD AND INTEGRAL CONTROL SYSTEM OF CATALYTIC NEUTRALISER (EMBODIMENTS) | 2015 |
|
RU2702062C2 |
| METHOD (EMBODIMENTS) AND SYSTEM FOR ESTIMATING PRESSURE OF EXHAUST GASES USING OXYGEN SENSOR WITH ALTERNATING VOLTAGE | 2016 |
|
RU2717188C2 |
| SYSTEM AND METHOD (EMBODIMENTS) FOR ENGINE | 2017 |
|
RU2695236C2 |
