Method of controlling airflow through motor vehicle internal combustion engine intake involves determining position of butterfly valve as a function of flow across valve and external parameters

摘要

Method involves generating a value for the weight of air flow across a butterfly valve (8) as a function of the amount pumped and with a transfer function (22) inverse to the transfer function of the inlet manifold (23) downstream of the valve. The position of the butterfly valve is controlled as a function of the value of the flow across the valve and external functional parameters.