Exhaust-gas analyzer

Details Exhaust-gas analyzer Exhaust-gas analyzer

1993-04-12

1995-05-30

Williams, Hezron E.

Measuring and testing

Gas analysis

Gas of combustion

7386311, G01N 122

Patent

active

054191785

ABSTRACT:
An exhaust-gas analyzer, particularly for emissions testing of motor-vehicle engines has a sampling tube into which a mixture of exhaust gas and ambient air is fed through gas lines. A gas feed pump is disposed downstream of the sampling tube with a flowmeter inserted in the air line feeding electrical signals to a computing unit. The unit computes instantaneous standard total flow rate, allowing for gas pressure and temperature.

REFERENCES:
patent: 3603155 (1971-09-01), Morris et al.
patent: 3699814 (1972-10-01), Kaufman
patent: 3965749 (1976-06-01), Hadden et al.
patent: 4586367 (1986-05-01), Lewis
patent: 5184501 (1993-02-01), Lewis et al.

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