Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Patent
1998-01-21
2000-05-16
Denion, Thomas
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
60274, 60276, 60277, 701109, F01N 300
Patent
active
060620196
ABSTRACT:
A method of controlling the fuel/air ratio of an internal combustion engine in which the output signal of a first lambda probe which is arranged in the exhaust gas passage in front of a catalytic converter of the internal combustion engine is fed to a controller which has a proportional-and-integral (PI) characteristic. The controller gives off a setting variable for the fuel/air ratio. 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 and acts on the control circuit of the first lambda probe.
In order to permit an accurate, adaptable control, the proportional portion of the output signal of the control circuit of the first lambda probe is modified as a function of the output signal of the second lambda probe.
REFERENCES:
patent: 5115639 (1992-05-01), Gopp
patent: 5319921 (1994-06-01), Gopp
patent: 5438827 (1995-08-01), Ohuchi et al.
patent: 5511377 (1996-04-01), Kotwicki
patent: 5528899 (1996-06-01), Ono
patent: 5598703 (1997-02-01), Hamburg et al.
Denion Thomas
Farber Martin A.
Mannesmann VDO AG
Tran Binh
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