Air flow rate measuring device

Details Air flow rate measuring device Air flow rate measuring device

1980-12-01

1983-08-02

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Proportional

73118, G01F 500

Patent

active

043959075

ABSTRACT:
An air flow rate measuring device has a by-pass passage branched from a main air passage leading to an engine, and heat wires provided in the by-pass passage. The inlet of the by-pass passage is positioned at the upper end of a venturi tube disposed in the main air passage, shaped annularly, and opened to the main air passage so that the air at the inlet can be subjected to the dynamic pressure of the main air stream. The outlet of the by-pass passage also is annularly formed and opened normally to the main air stream in the main air passage. The flow rate of air sucked into the engine is measured by the heat wires subjected to air flow taken in the by-pass passage.

REFERENCES:
patent: 790888 (1905-05-01), Ferris
patent: 1010400 (1911-11-01), Coleman
patent: 3559482 (1971-02-01), Baker
patent: 4142407 (1979-03-01), Kuroiwa et al.
patent: 4264961 (1981-04-01), Nishimura et al.
patent: 4282751 (1981-08-01), Brown

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