Measuring and testing – Volume or rate of flow – Thermal type
Patent
1981-03-24
1983-08-23
Birmiel, Howard A.
Measuring and testing
Volume or rate of flow
Thermal type
73116, G01F 168
Patent
active
043996973
ABSTRACT:
A gas flow measuring apparatus for measuring intake air flow for an automobile engine having an electrical heater resistive member, and first and second temperature dependent resistive members. The first resistive member is located so as to be well influenced by heat from the heater resistive member, while the second resistive member is located so as to be little influenced by the same. The measuring apparatus measures a gas flow rate by using an output signal from a voltage dividing circuit as a series circuit of the first and second resistive members. In the gas flow measuring apparatus, a heater film resistive member is deposited on a first support member by an evaporation depositing or printing process, and is further covered with electric insulating material such as glass. The first resistive member is formed on the heat resistive member, with the insulating material interposing therebetween, whereby the close proximity of the heater resistive member to the first resistive member is realized, and the second resistive member is formed on a second support member.
REFERENCES:
patent: 3900819 (1975-08-01), Djorup
patent: 3975951 (1976-08-01), Kohama et al.
patent: 3992940 (1976-11-01), Platzer, Jr.
patent: 4028689 (1977-06-01), Schopp
patent: 4210616 (1980-07-01), Peter et al.
Egami Tsuneyuki
Kawai Hisasi
Kohama Tokio
Obayashi Hideki
Birmiel Howard A.
Nippon Soken Inc.
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