Air flow rate measuring device
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United States of America Patent
Stats
-
Aug 2, 1983
Grant Date -
N/A
app pub date -
Dec 1, 1980
filing date -
Nov 29, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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