Patent ID: 7004156
Filing Date: 2006-02-28
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A method of determining an intake port mass airflow in an internal combustion engine having an intake system, a combustion chamber comprising a cylinder which is adapted for direct injection of a fuel and an exhaust system, the engine adapted for combustion of stoichiometric and non-stoichiometric air/fuel mixtures, the intake system having an intake air throttle to throttle an intake airflow input into an intake manifold for distribution to an intake port having an intake valve for directing an intake port airflow output into the combustion chamber, the combustion chamber operatively connected to the exhaust system for removal of an exhaust airflow through an exhaust port having an exhaust valve and an exhaust gas recirculation (EGR) conduit which is adapted to return a portion of the exhaust airflow through an EGR valve as an EGR airflow input into the intake manifold, the method comprising: determining an intake mass airflow input ({dot over (m)} determining an EGR mass airflow input ({dot over (m)} determining a plurality of engine state parameters related to the intake airflow and the EGR airflow into the intake manifold; and determining an effective intake mass airflow output ({dot over (m)}