METHOD FOR MEASURING FRESH AIR BY EVALUATING AN INTERNAL CYLINDER PRESSURE SIGNAL

摘要

The invention relates to a method for determining an air mass mair in a cylinder of an internal combustion engine. A first filling equivalent FAcomp is determined during a compression phase of the cylinder, wherein the first filling equivalent corresponds to a first average pressure difference in a first angle range of a crank angle in the compression phase. A second filling equivalent FAexp is determined during an expansion phase of the cylinder, wherein the second filling equivalent corresponds to a second average pressure difference in a second angle range of the crank angle of the expansion phase. A differential filling equivalent FAdiff is calculated by subtracting the first filling equivalent from the second filling equivalent. The air mass in the cylinder is determined on the basis of the differential filling equivalent. The invention further relates to a corresponding control device and to a corresponding computer program for performing said method.