Air flow rate measurement device
AssigneeHitachi Automotive Systems, Ltd.
InventorsTakayuki YOGO, Naoki SAITO, Hiroaki HOSHIKA, Takahiro MIKI
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Abstract
An air flow rate measurement device capable of suppressing disturbance of a flow of measured gas and reducing a characteristic influence due to water droplets flowing with intake air is realized. An edge 800 of the upstream side where air flows in a circuit board 400 on which a flow rate detection portion 602 is mounted is provided with a segmentation portion 801 to be a semicircular notch structure to segment the edge 800. Water droplets flowing with measured gas 30 can be captured by the segmentation portion 801 to inhibit the water droplets from arriving at the flow rate detection portion 602.
Claims12
An air flow rate measurement device, comprising:
- a board which has a flow rate detection portion to detect a flow rate of measured gas;
- and
- a housing which is provided with a passage taking a part of the measured gas and fixes the board so that the flow rate detection portion is disposed in the passage,
- wherein the board has a segmentation portion which is provided in an edge of the upstream side of a flow of the measured gas with respect to the flow rate detection portion and segments a part of the edge.
Dependencies are inferred from the claim text.