Air flow sensor

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Patent

CA 1232779

Abstract: AIR FLOW SENSOR An air flow sensor (10) as may be used to measure input air to an internal combustion engine has an aero- dynamically designed impact tube (16) for diverting by- pass air to a pair of sensors (28, 30). Downstream from the impact tube (16) is a venturi section providing ex- haust means for the bypass air. The exhaust path con- figuration for the bypass air shields the sensors (28, 30) from a reverse pressure wave which can result from an engine backfire. The impact tube (16) operates to integrate the air velocity over a full radius of the air flow body (14). (FIGURE 1)

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