method for adjusting air standards from a ersatzkennfeld, in pulsationen air within a brennkraftmaschine ansaugrohr to control the gemischaufbereitung is used in the currently prevailing (in the ambient air

摘要

A method and an apparatus are provided for adapting air values from a substitute performance graph to currently prevailing variables of state of ambient air. The air values are used for controlling mixture preparation if pulsations of air occur in an intake tube of an internal combustion engine instead of using measured values supplied by an air meter. The air values are adapted by multiplying the air values by an adaptation factor. In one embodiment the adaptation factor is calculated by dividing a measured value supplied by the air meter in the intake tube of the internal combustion engine by an air value taken from the substitute performance graph and subjecting the adaptation factor to sliding averaging, at times when no pulsations are present; and using a lambda-control-average value as the adaptation factor and subjecting the adaptation factor to sliding averaging, at times when pulsations are present. In another embodiment the adaptation factor is calculated by taking a substitute air value from the substitute performance graph, multiplying the substitute air value by a temperature value, multiplying a reciprocal value of the multiplication by a measured value supplied by the air meter in the intake tube, and subjecting the result to sliding averaging, at times when no pulsations are present; and using a lambda-control-average value as the adaptation factor and subjecting the adaptation factor to sliding averaging, at times when pulsations are present.