Stereo lambda control
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United States of America Patent
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-
Dec 7, 1993
Grant Date -
N/A
app pub date -
Feb 4, 1991
filing date -
Aug 4, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In the method for the adapted precontrol and feedback control of the air/fuel mixtures to be supplied to the two fuel-metering devices of an internal combustion engine, which has two separate exhaust-gas channels with a lambda probe and a catalytic converter in each channel, a common value of the precontrol manipulated variable and a common lambda desired value are determined for both fuel-metering devices. On the other hand, values of a control manipulated variable are determined separately for each fuel-metering device and values of precontrol adaptation variables, which are dependent upon the values of the control manipulated value, are determined and are superposed separately one after the other on the common precontrol value. This method makes it possible to manage with a single device for both cylinder banks which are to be operated in a stereo lambda control.
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