Patent ID: 7966815
Filing Date: 2011-06-28
Classification: F02B,F02D,Y02T

Abstract:
1. A method of determining a change in air mass at an inlet manifold of a supercharged internal combustion engine comprising: measuring airflow upstream of a throttle valve that is upstream of a supercharger; subtracting, using a processing unit having one or more computer processors, from the measured airflow, a value representative of a change in the air mass between the throttle valve and the supercharger based on a change in pressure between the throttle valve and the supercharger; and subtracting, using the processing unit, from the measured airflow, a modification value dependent upon a current engine speed and a signal representative of a pressure at the inlet manifold; wherein the value representative of a change in the air mass between the throttle valve and the supercharger is computed as: wherein the modification value is computed as: