Method and an apparatus for estimating an amount of drawn...

Details Method and an apparatus for estimating an amount of drawn... Method and an apparatus for estimating an amount of drawn...

2005-04-05

2005-04-05

Bui, Bryan (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Mechanical measurement system

C702S047000, C701S102000, C123S568160

Reexamination Certificate

active

06876933

ABSTRACT:
A method and an apparatus for estimating an amount of drawn air of a cylinder and a method and an apparatus for controlling the amount of drawn air, are presented. An estimated value of an amount of drawn air of the cylinder, based on intake manifold pressure, is multiplied by a value of an identification parameter obtained by an adaptive observer, to obtain a final estimated value of an amount of drawn air of the cylinder. An accurate estimated value in a transient state as well as an estimated value not oscillating in a steady state can be obtained. Accordingly, accuracy of air-fuel ratio control can be remarkably increased.

REFERENCES:
patent: 6321732 (2001-11-01), Kotwicki et al.
patent: 6708102 (2004-03-01), Jankovic et al.
patent: 11-294231 (1999-10-01), None

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