Measuring and testing – Volume or rate of flow – Thermal type
Patent
1981-02-02
1983-01-25
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Thermal type
73118, G01F 168
Patent
active
043696562
ABSTRACT:
An air flow rate sensor including a resistor the characteristic of which depends on temperature for operation mounted in a suction conduit of an internal combustion engine. The air flow rate sensor includes a tube of inorganic material, a platinum wire wound in convolutions on the surface of the tube, and a glass coating applied at least to the surface of the resistor while allowing a part of the surface to be exposed. The glass coating has a thickness smaller than the diameter of the resistor wire and enables equalization of pulsations of the sensor output to be obtained because of the thermal capacity of the glass coating.
REFERENCES:
patent: 2852647 (1958-09-01), Charmichael
patent: 3677085 (1972-07-01), Hayakawa
patent: 4011756 (1977-03-01), Lemos
patent: 4025891 (1977-05-01), Fletcher et al.
Miya Kazuhiko
Nishimura Yutaka
Oyama Yoshishige
Sato Kanemasa
Ueno Sadayasu
Goldstein Herbert
Hitachi , Ltd.
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