Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1992-12-18
1993-09-14
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
F02M 5100
Patent
active
052439542
ABSTRACT:
Oxygen sensor deterioration is detected by initially counting the number of fuel units required to change the output voltage of a nondeteriorated sensor between first and second voltages, and subsequently counting the number of fuel units required to change the output voltage of the sensor between the first and second voltages, as the sensor ages, until a subsequent count exceeds the initial count by a given amount. The method detects when the air/fuel ratio desired for normal engine operation drifts outside acceptable tolerance. The method detects and stores a first difference between air/fuel ratios, corresponding to first and second sensor output voltages, and then subsequently detects a second difference between air/fuel ratios, corresponding respectively to the first and second sensor output voltages. When the second difference exceeds the first difference by a given amount, deterioration is indicated.
REFERENCES:
patent: 3938075 (1976-02-01), Reddy
patent: 4083338 (1978-04-01), Bertling et al.
patent: 4096839 (1978-04-01), Niertit
patent: 4099491 (1978-07-01), Reddy
patent: 4121548 (1978-10-01), Hattori et al.
patent: 4177787 (1979-12-01), Hattori et al.
patent: 4364364 (1982-12-01), Subramaniam
patent: 4417558 (1983-11-01), Osuga et al.
patent: 4638783 (1987-01-01), Snyder
patent: 4887576 (1989-12-01), Inamoto et al.
patent: 4933863 (1990-06-01), Okano et al.
patent: 4980834 (1990-12-01), Ikeda et al.
patent: 5048490 (1991-09-01), Nakaniwa
patent: 5052361 (1991-10-01), Ono et al.
patent: 5054452 (1991-10-01), Denz
patent: 5065728 (1991-11-01), Nakaniwa
patent: 5080072 (1992-01-01), Hosokai et al.
patent: 5115781 (1992-06-01), Kurita et al.
Dresser Industries Inc.
Nelli Raymond A.
LandOfFree
Oxygen sensor deterioration detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oxygen sensor deterioration detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oxygen sensor deterioration detection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2020497