Patent ID: 7512479
Filing Date: 2009-03-31
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A method for estimating air fractions in an internal combustion engine having an intake manifold, exhaust manifold, intercooler channel, compressor input channel and a dual-loop exhaust gas recirculation system, comprising: (a) receiving information comprising pressure, temperature, mass air flow, fuel mass flow rate, exhaust gas air to fuel ratio, valve position and engine speed; (b) generating output signals based upon said information and estimating: (c) comparing at least one of said estimated air fractions to a measured air fraction; (d) determining a difference in at least one of said estimated air fractions to said measured air fraction; and (e) repeating steps (a)-(e) based upon the difference identified in step (d).