Contaminant free backflow reducing insert for mass air flow sens

Details Contaminant free backflow reducing insert for mass air flow sens Contaminant free backflow reducing insert for mass air flow sens

1994-10-03

1996-07-23

Chilcot, Richard

Measuring and testing

Volume or rate of flow

Proportional

7320422, 731182, G01F 168, G01F 500

Patent

active

055378706

ABSTRACT:
A housing structure for mass air flow sensors includes an auxiliary passage way, internal to the structure, that diverts a portion of the main air flow towards sensing elements. The sensing elements are shielded from the main air flow, so the contaminants separate from the diverted air at the point of diversion and continue downstream in the main air flow. The decontaminated, diverted air passes over the sensing elements and out of the housing structure through two exit openings located in the rear of the structure. The housing structure, by locating the sensing elements within itself, away from the main air flow, and locating exit openings for the diverted air behind a blocking wall, is also able to eliminate the effect of backflow air over the mass air flow sensing elements.

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