Power plants – Internal combustion engine with treatment or handling of... – Having sensor or indicator of malfunction – unsafeness – or...
Patent
1992-10-06
1994-01-18
Kamen, Noah P.
Power plants
Internal combustion engine with treatment or handling of...
Having sensor or indicator of malfunction, unsafeness, or...
60274, 60276, 60285, F01N 300
Patent
active
052791165
ABSTRACT:
A device for determining a deterioration of a catalytic converter for an engine equipped with a catalytic converter disposed in the exhaust passage and upstream and downstream air-fuel ratio sensors disposed in the exhaust passage upstream and downstream of the catalytic converter, respectively, wherein the device calculates the lengths of the output response curves of the upstream and downstream air-fuel ratio sensors LVOM and LVOS, respectively, and the areas surrounded by the output response curves and a reference voltage line of the upstream and downstream air-fuel ratio sensors AVOM and AVOS, respectively, the device determining whether or not the catalyst is deteriorated in accordance with the relationship between the ratio LVOS/LVOM and the ratio AVOS/AVOM.
REFERENCES:
patent: Re33942 (1992-06-01), Katsuno et al.
patent: 4177787 (1979-12-01), Hattori et al.
patent: 4739614 (1988-04-01), Katsuno et al.
patent: 4817383 (1989-04-01), Masui
patent: 4881368 (1989-11-01), Demura et al.
patent: 5088281 (1992-02-01), Izutani et al.
patent: 5119628 (1992-06-01), Uema et al.
John W. Koupal et al, "Detection of Catalyst Failure On-Vehicle Using the Dual Oxygen Sensor Method," Jul. 31, 1991, pp. 135-146. (SAE Technical Paper Series 910561).
William B. Clemmens, et al., "Detection of Catalyst Performance Loss Using On-Board Diagnostics," Feb. 26-Mar. 2, 1990, pp. 1-18; International Congress and Exposition--Detroit, Mich. (SAE Technical Paper Series 900062).
Kobayashi Nobuyuki
Shimizu Yasuhiro
Kamen Noah P.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Device for determining deterioration of a catalytic converter fo 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 for determining deterioration of a catalytic converter fo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for determining deterioration of a catalytic converter fo will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1130182