On-board diagnostic test of oxygen sensor

Details On-board diagnostic test of oxygen sensor On-board diagnostic test of oxygen sensor

1997-05-27

1998-09-01

Reavis, Robert

Measuring and testing

Instrument proving or calibrating

Gas or liquid analyzer

G01M 1900

Patent

active

058012958

ABSTRACT:
An on-board diagnostic test for an exhaust gas oxygen sensor includes sensing the output of the oxygen sensor and summing the output over a specified period to determine the length of the trace of the sensor voltage versus time. Such length over a given time period indicates the activity of the sensor. This data is compared to a threshold to determine if the exhaust gas oxygen sensor meets certain performance requirements.

REFERENCES:
patent: 5377484 (1995-01-01), Shimizu
patent: 5423203 (1995-06-01), Namiki et al.
patent: 5488858 (1996-02-01), Achleitner

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