Fresh air mass flow rate determining method for internal combustion engine, involves calculating rate using non-linear systems with differential equations, where one equation is based on equilibration of in and out streaming energy flows

摘要

The method involves measuring a fresh air mass flow rate in an inlet port of an internal combustion engine before a pressure stage. The rate in a storage space`s outlet is calculated based on the measured value with regard to different pressures before and after the stage, by non-linear systems with two differential equations. One of the equations is based on an equilibration of instreaming and outstreaming energy flows in the space.