Measuring and testing – Gas analysis – Gas of combustion
Patent
1996-10-28
1998-09-08
Brock, Michael
Measuring and testing
Gas analysis
Gas of combustion
73 106, 204401, 204427, G01N 2726
Patent
active
058047000
ABSTRACT:
A device for self-diagnosis in a present invention includes a diffusion compartment having a porous diffusion passage at either end thereof, a sensing cell installed below the diffusion compartment for generating electromotive forces depending on the oxygen concentration via two electrodes provided on the upper and lower surfaces thereof, and a pumping cell for regulating the oxygen pressure in the diffusion compartment via two electrodes installed above the diffusion compartment. Also a method for self-diagnosis in a present invention comprises the step for operating A/F sensor, comparing a measured pumping voltage, making compensations in an output signal of the A/F sensor and diagnosing the corresponding A/F sensor if the pumping voltage value exceeds upper-limit voltage.
REFERENCES:
patent: 4819602 (1989-04-01), Mieno et al.
patent: 4938194 (1990-07-01), Kato et al.
patent: 4981125 (1991-01-01), Kato et al.
patent: 5047137 (1991-09-01), Yamada et al.
patent: 5174885 (1992-12-01), Hayakawa et al.
patent: 5265458 (1993-11-01), Usami et al.
patent: 5558752 (1996-09-01), Wang et al.
Kwon Chang-soon
Lee Chung-ho
Brock Michael
Samsung Electro-Mechanics Co. Ltd.
LandOfFree
Device and method for self-diagnosis in air-to-fuel ratio sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device and method for self-diagnosis in air-to-fuel ratio sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and method for self-diagnosis in air-to-fuel ratio sensor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1283175