Patent ID: 11869287
Assignee: KAWASAKI MOTORS, LTD.
Field: Environmental technology (Chemistry)
Classification: CPC F  G  B  Y | IPC B  F  G

Claim 0:
1. A processing unit configured to determine abnormality in an exhaust gas sensor configured to be disposed in an exhaust passage of an internal combustion engine and to detect a component in exhaust gas, the processing unit comprising:
a processor configured to:
calculate responsiveness of the exhaust gas sensor on the basis of a timewise change of output values of the exhaust gas sensor, and
determine that the exhaust gas sensor has abnormality when the responsiveness calculated is lower than a predetermined responsiveness threshold,
wherein the processor is configured to determine if the exhaust gas sensor has abnormality, excluding an excluded period during which a slope of the output values becomes zero or is inversed with respect to a preceding trend of the timewise change while the output values of the exhaust gas sensor timewisely change between a predetermined first determination value and a second determination value, and
wherein the processor is configured to detect the excluded period on the basis of a differential value of the timewise change of the detected values.