Measuring and testing – Volume or rate of flow – Combined
Patent
1995-07-05
1997-07-22
Chilcot, Richard
Measuring and testing
Volume or rate of flow
Combined
73195, 73203, G01M 1500
Patent
active
056505655
ABSTRACT:
A mini-diluter apparatus and method are provided for preparing dilute samples of exhaust gas for emission testing. The apparatus includes first and second mass flow controllers which respectively control the mixing of exhaust gas and diluent gas samples at a constant ratio. The mixture is fed at a pressure, controlled by a back pressure regulator, to a third mass flow controller. This third controller provides a controlled sample rate (normally proportional to exhaust flow from an engine under test) to a bag sample system, or other sampling system, with excess mixture being exhausted through a pressure regulator to atmosphere. Improved accuracy and reduced calibration complexity are results of the improved apparatus and method.
REFERENCES:
patent: 3593023 (1971-07-01), Dodson et al.
patent: 3699814 (1972-10-01), Kaufman
patent: 4361028 (1982-11-01), Kamiya et al.
patent: 4372155 (1983-02-01), Butler et al.
patent: 4586367 (1986-05-01), Lewis
patent: 4660408 (1987-04-01), Lewis
patent: 4823591 (1989-04-01), Lewis
patent: 5090258 (1992-02-01), Yamasaki et al.
patent: 5196170 (1993-03-01), Patashnick et al.
patent: 5279970 (1994-01-01), Patashnick et al.
patent: 5401468 (1995-03-01), Patashnick et al.
SAE Technical Paper Series 930141, A Sampling for the Measurement of PreCatalyst Emissions from Vehicles Operating Under Transient Conditions. Jon McLeod et al., Published Mar. 1, 1993.
DeCarteret Steven Scott
McLeod Jon Richard
Nagy Donald B.
Schroeder Francis Patrick
Chilcot Richard
Enviromental Sciences Research and Development Partnership
McCall Eric S.
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