Method for monitoring catalytic converter efficiency
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 26, 1999
Grant Date -
N/A
app pub date -
Jul 31, 1997
filing date -
Jul 31, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The catalytic converter of an internal combustion engine is monitored with regard to its conversion capacity. A sensor downstream of the catalytic converter measures the oxygen concentration in the exhaust gas leaving the catalytic converter. A mean value is determined of the oxygen concentration measurement signal, and the area between the measurement signal and the mean value is calculated. The area is then compared with a predetermined comparison value, and a low conversion capacity of the catalytic converter is deduced from the comparison if the area is greater than the comparison value. A corresponding error signal may be stored in memory or immediately output as a warning for the driver of the vehicle.
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