Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Russell Robert Graze, Jr.0
Date of Patent
November 27, 2007
0Patent Application Number
114110880
Date Filed
April 26, 2006
0Patent Primary Examiner
Patent abstract
A method for controlling the flow through an exhaust sampling system includes sensing an operating characteristic of a power source, extracting a sample of an exhaust flow of the power source, combining the sample with an additional flow of fluid, and measuring a particulate level of the combined flow. A flow rate of the extracted sample is controlled to be substantially proportional to a flow rate of the exhaust flow based on a difference between the combined flow and the additional flow.
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