Monitoring of exhaust gas oxygen sensor performance

Details Monitoring of exhaust gas oxygen sensor performance Monitoring of exhaust gas oxygen sensor performance

2011-01-04

2011-01-04

Denion, Thomas E (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

Having sensor or indicator of malfunction, unsafeness, or...

C060S297000, C060S285000, C060S286000, C073S023320, C073S114720

Reexamination Certificate

active

07861515

ABSTRACT:
A method of monitoring a performance of an oxygen sensor is disclosed. One embodiment comprises determining a first air/fuel ratio from a signal from an exhaust oxygen sensor; determining a second air/fuel ratio from a temperature upstream of the particulate filter, a pressure differential across the particulate filter and one or more of an airflow into the engine and a fuel flow into the engine; comparing the first air/fuel ratio and the second air/fuel ratio; and diagnosing an error condition of the oxygen sensor if the first air/fuel ratio does not meet a predetermined condition relative to the second air/fuel ratio.

REFERENCES:
patent: 5125384 (1992-06-01), Tada
patent: 6711892 (2004-03-01), Tamura et al.
patent: 6941750 (2005-09-01), Boretto et al.
patent: 6966179 (2005-11-01), Onodera et al.
patent: 6968677 (2005-11-01), Tamura
patent: 7065960 (2006-06-01), Gioannini et al.
patent: 2004/0139852 (2004-07-01), Koga et al.
patent: 2006/0016179 (2006-01-01), Okugawa et al.
patent: 2006/0032217 (2006-02-01), Kondou et al.
patent: 0555831 (1993-02-01), None
patent: 6229969 (1994-08-01), None
patent: 8121221 (1996-05-01), None
ISA, United Kingdom Intellectual Property Office, International Search Report of GB0812464.6, Jan. 16, 2009, 1 page.

Affiliated with

Also associated with

Rating

Monitoring of exhaust gas oxygen sensor performance does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Monitoring of exhaust gas oxygen sensor performance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monitoring of exhaust gas oxygen sensor performance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2709143