Gas flow measuring apparatus

Details Gas flow measuring apparatus Gas flow measuring apparatus

1981-07-23

1983-11-15

Myracle, Jerry W.

Measuring and testing

Volume or rate of flow

Thermal type

73118, G01F 168

Patent

active

044148470

ABSTRACT:
A gas flow rate measuring apparatus for measuring the intake air flow rate of an automobile engine or the like is disclosed, which comprises a flow rate measuring tube containing an electric heater resistance wire and two temperature-dependent resistance wires, one subject to the effect of heat of the electric heater and the other free from the effect. An output signal of a voltage divider circuit including the series-connected temperature-dependent resistance wires is used to measure the gas flow rate. The electric heater resistance wire and the temperature-dependent resistance wire thermally affected thereby are wound side by side but avoiding occurrence of any short-circuit therebetween on a single support member of an electrically insulating material.

REFERENCES:
patent: 3441893 (1969-04-01), Gordon et al.
patent: 3742761 (1973-07-01), Randall
patent: 4244217 (1981-01-01), Ledbetter
patent: 4335605 (1982-06-01), Boyd

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