Intake air quantity measuring apparatus

Details Intake air quantity measuring apparatus Intake air quantity measuring apparatus

1990-03-28

1991-10-29

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

7320419, G01F 168

Patent

active

050605119

ABSTRACT:
The invention is directed to an arrangement for measuring a quantity of intake air passing through an intake air duct by a sensing element disposed in parallel with a flow direction of the intake air. The sensing element includes a flow speed sensing resistor deposited on a base plate and formed into a film for sensing a flow speed of the intake air, and a pair of lead members deposited on the base plate and electrically connected to the resistor. The flow speed sensing resistor is arranged to form a temperature distribution of the resistor uniform in a direction parallel with and/or perpendicular to the flow direction of the intake air.

REFERENCES:
patent: 3996799 (1976-12-01), van Putten
patent: 4559814 (1985-12-01), Sato et al.
patent: 4803875 (1989-02-01), Kuhn et al.
SAE Technical Paper 880560, "Hot-Film Air Mass Meter A Low Cost Approach to Intake Air Measurement".

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