Method for detecting steady-state and transient air flow...

Details Method for detecting steady-state and transient air flow... Method for detecting steady-state and transient air flow...

2008-01-15

2008-01-15

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S361000, C073S118040

Reexamination Certificate

active

07319929

ABSTRACT:
An air flow state determining system that determines a mass air flow into a cylinder of an engine having a cam phaser includes a first module that determines whether an air flow state is one of steady-state and transient based on a cam phaser position. A second module determines the mass air flow using one of a mass air flow sensor signal and a speed density relationship based on whether the mass air flow state is one of steady-state and transient.

REFERENCES:
patent: 5184302 (1993-02-01), Ishida et al.
patent: 5721375 (1998-02-01), Bidner
patent: 5954783 (1999-09-01), Yamaguchi et al.
patent: 6725149 (2004-04-01), Wada et al.
patent: 62-170752 (1987-07-01), None
patent: 9-195822 (1997-07-01), None

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