Thermal air-flow sensor

Details Thermal air-flow sensor Thermal air-flow sensor

1991-02-15

1992-03-03

Myracle, Jerry W.

Measuring and testing

Simulating operating condition

Marine

7320414, G01M 1500

Patent

active

050921649

ABSTRACT:
A thermal type air flow sensor wherein a heat generating element is arranged in an intake system and a time for obtaining an increase in a temperature by a predetermined value is detected, which time corresponds to an amount of the intake air. This time is measured repeatedly at predetermined intervals in one full cycle of the pulsation, and a total amount of variation in one cycle is calculated by differences of the measured values at adjacent sampling timings, which integrated values are obtained throughout one full cycle. This total amount of variation is compensated by an absolute value of the integrated value of differences between the adjacent measured values, which corresponds to the effect of the change in the average measured value in one full cycle, induced by an acceleration or deceleration of the engine. This compensated variation amount is used to obtain a corrected intake amount value.

REFERENCES:
patent: 4934189 (1990-06-01), Tanimoto et al.

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