Apparatus for measuring the mass of a flowing medium

Details Apparatus for measuring the mass of a flowing medium Apparatus for measuring the mass of a flowing medium

1979-10-11

1981-12-08

Goldberg, Gerald

Measuring and testing

Volume or rate of flow

Thermal type

73116, G01M 1500, G01F 168

Patent

active

043041280

ABSTRACT:
An apparatus is proposed for measuring the mass of a flowing medium, and in particular for measuring the air mass of internal combustion engines. The apparatus includes a resistor arranged in the stream of the flowing medium, the temperature and/or resistance parameter of this resistor being controlled in dependence on the mass of the medium, the extent to which the parameter is controlled being a measure of the mass of the flowing medium. The resistor is an element of a bridge circuit comprising at least one further resistor arranged in the stream of the flowing medium. Also included is a tubular member which has an inner surface defining the flow cross section of the flowing medium. Within this tubular member there is situated a probe ring to which both resistors are mounted to be exposed to the flowing medium. Connected to the tubular member is a terminal box within which a hybrid switching circuit is situated. The hybrid switching circuit is mounted to a mounting board and is connected, by a printed circuit board, to a multiple contact plug and to the bridge circuit.

REFERENCES:
patent: 3931736 (1976-01-01), Olmstead
patent: 3956928 (1976-05-01), Barrera
patent: 3965730 (1976-06-01), Innes
patent: 3971247 (1976-07-01), Rodder
Radio Shack Dictionary; 1974-1975, p. 272.

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