Method for the lambda control of an internal combustion engine h

Details Method for the lambda control of an internal combustion engine h Method for the lambda control of an internal combustion engine h

1991-07-31

1993-04-20

Lazarus, Ira S.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60276, 60277, 60285, 60299, F01N 320

Patent

active

052031659

ABSTRACT:
The invention is directed to a method for lambda control of an internal combustion engine having a catalyzer and a measuring probe arrangement in front of the catalyzer for emitting a measuring signal and a testing probe arrangement behind the catalyzer for emitting a test signal. The method includes the steps of: forming a ratio between the measuring signal and the test signal at pregiven operating conditions; evaluating said ratio as an estimating quantity for the conversion rate of the catalyzer; and, modifying output values of control parameters in a pregiven controlled manner on the basis of the instantaneous values of said ratio, said output values being applicable for controlling an internal combustion engine having a new catalyzer. This method affords the advantage that it evaluates a catalyzer with the aid of the above-mentioned ratio value and controllably modifies values of control parameters in dependence upon the evaluation ratio. This leads to an especially stable control with low toxic gas discharge.

REFERENCES:
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patent: 4622809 (1986-11-01), Abthoff et al.
patent: 4819427 (1987-04-01), Nagai et al.
patent: 4884066 (1989-11-01), Miyata et al.
patent: 5018348 (1991-05-01), Durschmidt et al.
patent: 5070692 (1991-12-01), Nada
patent: 5077970 (1992-01-01), Hamburg

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