Intake air flow rate detector

Details Intake air flow rate detector Intake air flow rate detector

1979-12-04

1981-08-25

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

With indirect temperature or density compensation

G01F 132, G01F 186

Patent

active

042852463

ABSTRACT:
An intake air flow rate detector of an internal engine using a Karman vortex sensor, wherein the mass flow rate is obtained by detecting a volumetric flow rate by the Karman vortex sensor and a dynamic pressure or differential pressure at upstream and downstream of the sensor by a strain gage mounted on a partition in a closed chamber. Density compensation of the flow of air is effected only taking said measurement values at a standard range in which the Karman vortex is stable and the differential pressure has a large value.

REFERENCES:
patent: 3785204 (1974-01-01), Lisi
patent: 4050304 (1977-09-01), Thomas

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