Flow rate meter

Details Flow rate meter Flow rate meter

1989-09-06

1990-12-11

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

731182, 7320426, G01F 168

Patent

active

049761455

ABSTRACT:
In flow rate meters with a ceramic substrate extending into a flow opening and having at least one temperature-dependent resistor film, there is the danger that excessive acceleration forces from a fall or from an impact will break the ceramic substrate. There is also the danger of destruction of the ceramic substrate from being unintentionally touched by an object or a finger. To increase the protection of the ceramic substrate against breakage, a reinforcing element is provided on a first housing half, protruding into the flow opening over a portion of the ceramic substrate and being glued to the ceramic substrate in the same manner as the first housing half. Protective ribs protrude from the housing halves into the flow opening in the direction of the ceramic substrate and prevent unintentional contact with the ceramic substract by objects or fingers. The flow rate meter is suitable for measuring the flow rate of the aspirated air in internal combustion engines.

REFERENCES:
patent: 4478077 (1984-10-01), Bohrer et al.
patent: 4517837 (1985-05-01), Oyama et al.
patent: 4776214 (1988-10-01), Moran et al.
patent: 4783996 (1988-11-01), Ohta et al.
patent: 4803875 (1989-02-01), Kuhn et al.
"Hot-Film Air Mass Meter--A Low Cost Sauer Approach to Intake Air Measurements" in SAE Technical Paper Series, Feb.-Mar. 1988.

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