Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Reexamination Certificate
2008-02-04
2010-12-14
Gimie, Mahmoud (Department: 3747)
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
C701S109000
Reexamination Certificate
active
07849844
ABSTRACT:
An internal combustion engine has an exhaust gas catalyst, a first exhaust gas sensor that is arranged for use in lambda control, and a second sensor that is arranged for trim control. The measuring signal of the second sensor is used to determine a NOx quality value depending on the HC quality value and the NOx correction factor. A lambda quality value is determined depending on an actual value and a basic set value of the air/fuel ratio. An error indicator is determined depending on the lambda quality value and the NOx quality value, the error indicator being representative of a mixture component error in a first range and being representative of an exhaust gas catalyst error in a second range. At least one control parameter of a trim control and/or the trim set value of the trim control is adapted depending on the NOx correction factor.
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Continental Automotive GmbH
Gimie Mahmoud
King & Spalding L.L.P.
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