Patent ID: 6463912
Filing Date: 2002-10-15
Classification: F01L,F02D,Y02T

Abstract:
An apparatus for detecting the amount of intake air in an internal combustion engine having an intake passage, a throttle valve installed in said intake passage for controlling the amount of intake air, and a variable intake air control mechanism capable of varying the operating condition of an intake air control valve that controls the flow of intake air into a combustion chamber, said intake air amount detection apparatus comprising:flowing air amount measuring means for measuring the flow rate of air flowing through said intake passage; volumetric efficiency computing means for computing volumetric efficiency; smoothing factor computing means for computing a smoothing factor based on the volumetric efficiency computed by said volumetric efficiency computing means; and intake air amount computing means for computing the amount of engine intake air by smoothing the flow rate measured by said flowing air amount measuring means based on said smoothing factor computed by said smoothing factor computing means.