Method for detecting deterioration of catalyst and measuring conversion efficiency thereof with an air/fuel ratio sensor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 25, 1994
Issued Date -
N/A
app pub date -
Jan 6, 1993
filing date -
Apr 12, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention provides a method for accurately and precisely detecting deterioration of a catalyst and measuring a conversion efficiency of a catalyst for HC/CO/NOx by using an oxygen sensor and an air/fuel ratio sensor disposed on the upstream and downstream sides of the catalyst, respectively. The catalyst is determined to be deteriorating when an output amplitude of the air/fuel ratio sensor becomes greater than a predetermined value. The conversion efficiency of the catalyst is determined based on a predetermined relationship between the output amplitude and the mean converted rate of HC/CO/NOx.
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