Patent ID: 7295912
Filing Date: 2007-11-13
Classification: F01L,F02D,Y02T

Abstract:
1. An intake air amount control system for an internal combustion engine, which controls respective amounts of intake air drawn into cylinders via an intake passage that branches from a branching point into a plurality of passages, by respective variable intake air amount devices, independently of each other, comprising: intake air amount parameter-detecting means for detecting an intake air amount parameter indicative of an amount of intake air at a location upstream of the branching point of the intake passage; variation parameter-calculating means for calculating a variation parameter indicative of variation in intake air amount between the cylinders, based on a model formed by modeling an intake system of the engine including the intake passage, according to the detected intake air amount parameter, on a cylinder-by-cylinder basis; correction amount-calculating means for calculating, on a cylinder-by-cylinder basis, a correction amount for correcting the respective amounts of intake air drawn into the cylinders, according to the variation parameter calculated for each cylinder; and control means for controlling each variable intake air amount device according to the correction amount calculated for each cylinder.