Mass air flow sensor

Details Mass air flow sensor Mass air flow sensor

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Patent

CA 1204301

-10- ABSTRACT A heated element mass air flow meter 10 includes a cylinder 20 having a surface 21 with an area of stagnation 22. Element 11 is positioned aft of area of stagnation 22 and forward of a downstream area of turbulence 23. Deposition of air born dirt takes places at the stagnation area because dirt particles have a greater density and inertia than air and cannot turn as easily. The air passing the element has been substantially separted from air born dirt and carries less dirt than the remainder of the air stream. The accuracy of heated element meters is reduced by deposition of dirt on the element. A configuration as described reduces the amount of dirt striking the heated element 11 and improves accuracy of the meter.

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