Internal combustion engine induction air volume calculating...

Measuring and testing – Simulating operating condition – Marine

Reexamination Certificate

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Reexamination Certificate

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06901790

ABSTRACT:
A deviation DGAIR between a first induction air volume GAIRTH that is calculated (S10) based on a detected value (Gair) of an air flow meter and a second induction air volume GAIRPB that is calculated (S12) based on an absolute pressure (PBA) is calculated (S14), and a mean value DGAIRAVE of the deviation DGAIR is calculated (S16, S18), whereby when a difference DDGAIR between the deviation DGAIR and the mean value DGAIRAVE is larger than a predetermined value DGAIL1 (or when a correction mode AFMMODE is 1), secondary air is determined to be supplied to an engine, and the first induction air volume GAIRTH is then corrected (S24, S26).

REFERENCES:
patent: 6561016 (2003-05-01), Suhre et al.
patent: 2004/0111211 (2004-06-01), Takizawa et al.
patent: 3-48340 (1991-07-01), None

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