Method for controlling the fuel-air ratio of an internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 17, 1998
Grant Date -
N/A
app pub date -
Dec 5, 1996
filing date -
Dec 7, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for controlling the fuel-air ratio of an internal combustion engine in which the output signal of a first lambda probe, which is arranged in front of a catalytic converter in the exhaust pipe of the internal combustion engine, is fed to a controller. The controller gives off a setting variable for the fuel-air ratio, and a further signal which is obtained from the output signal of a second lambda probe arranged behind the catalytic converter is fed to the controller. In order to permit an accurate and adjustable control which further improves the fuel-air ratio in the sense of a reduction of the exhaust emission, a hold time is obtained on the output signal of the second lambda probe as a function of the time of the reversal of the output signal of the first lambda probe, whereby the output signal of the controller is shifted in time.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
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