Variable response time transient partial flow sampling...

Details Variable response time transient partial flow sampling... Variable response time transient partial flow sampling...

2005-06-27

2008-08-05

Raevis, Robert R (Department: 2856)

Measuring and testing

Sampler, sample handling, etc.

Automatic control

Reexamination Certificate

active

07406885

ABSTRACT:
A partial flow dilution tunnel in a gas sampling system is connected to the exhaust from an internal combustion engine. More accurate gas sampling results are enabled for accounting for a delay from when the engine produces an exhaust change to when that transient arrives at a probe location. Thus, an estimated time delay is determined, and the gas sampling system is operated at least in part based upon that estimated time delay for the exhaust to arrive at the sampling location.

REFERENCES:
patent: 5058440 (1991-10-01), Graze, Jr.
patent: 5535135 (1996-07-01), Bush et al.
patent: 6062092 (2000-05-01), Weaver
patent: 6615677 (2003-09-01), Dickson et al.
patent: 2003/0034018 (2003-02-01), Baldwin et al.

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