Mass air flow sensor two temperature production line test appara

Details Mass air flow sensor two temperature production line test appara Mass air flow sensor two temperature production line test appara

1992-07-27

1993-12-07

Myracle, Jerry W.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

731182, G01M 1900

Patent

active

052674673

ABSTRACT:
A two temperature test apparatus for a mass air flow sensor having a cold test station disposed in a cold test chamber and a hot test station disposed in a hot test chamber. A first air manifold connects the cold test chamber with a vacuum chamber. The first air manifold includes a sonic nozzle controlling the air flow through the first air manifold. A second air manifold connects the cold test station to the hot test station. A third air manifold connects the hot test station to an air filter within the hot test chamber. The mass air flow sensor is mounted on a production carrier having a transverse air passage receiving the sensing head of the mass air flow sensor. The transverse air flow passage of the carrier in the cold test station connects the first air manifold to the second air manifold and the transverse air flow passage of the carrier in the hot test station connects the second air manifold to the third air manifold. An electrical control energizes the mass air flow sensors in the cold and hot test stations and stores the output signal.

REFERENCES:
patent: 2755663 (1956-07-01), Smith et al.
patent: 3026706 (1962-03-01), Halsell et al.
patent: 3226973 (1966-01-01), Evans et al.
patent: 3469442 (1969-09-01), Brueckner
patent: 4590790 (1986-05-01), Hicks et al.

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