Device for determining deterioration of a catalytic converter for an engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 12, 1994
Grant Date -
N/A
app pub date -
Oct 6, 1992
filing date -
Oct 11, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
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 when the engine air-fuel ratio is feedback controlled, then the device determines whether or not the catalyst is deteriorated in accordance with the magnitude of the ratio LVOS/LVOM.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully