Method and apparatus for measuring the rate of air flow in the i

Details Method and apparatus for measuring the rate of air flow in the i Method and apparatus for measuring the rate of air flow in the i

1984-02-10

1986-02-25

Myracle, Jerry W.

Measuring and testing

Simulating operating condition

Marine

73204, G01M 1500

Patent

active

045719900

ABSTRACT:
The invention is directed to a method and an apparatus for measuring the air-flow rate in the intake tube of an internal combustion engine using a flow-measuring device which is insensitive to the direction of flow. In order to avoid incorrect measuring results when pulsations of the air flow occur, the reverse flow is sensed and, based on a total flow signal, deducted to determine the forward flow. At the points where the direction of flow is reversed, certain physical relationships prevail between flow-measuring signal, differential pressures, the presence of maxima and minima in the flow signal and the gradient of the flow signal. Several methods are disclosed to determine these reversal points as are flow charts for a computer-controlled determination of the air-flow rate.

REFERENCES:
patent: 4404846 (1983-09-01), Yamauchi et al.

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