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Exhaust gas collector for an exhaust aftertreatment system

  • US 9,482,154 B2
  • Filed: 12/05/2012
  • Issued: 11/01/2016
  • Est. Priority Date: 12/05/2012
  • Status: Active Grant
First Claim
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1. An exhaust aftertreatment system, comprising:

  • a duct having an inlet region, an outlet region, and a cross sectional area;

    an exhaust gas collector in the duct, including;

    a plurality of tubular sample members having upstream ends, downstream ends and one or more spaced apart exhaust collection holes, wherein the downstream ends of the tubular members are fluidly coupled at a common collection location, the tubular members are positioned in the duct with the exhaust collection holes at locations distributed across the cross sectional area and are adapted to collect exhaust samples from the one or more exhaust collection holes from across the cross sectional area of the duct;

    a non-sample collecting accumulator tube having a first portion fluidly coupled to the common collection location with a length extending radially from the common collection location, wherein the non-sample collecting accumulator tube and common collection location are adapted to mix and convey the exhaust gas samples collected from all of the plurality of sample members to a second portion of the non-sample collecting accumulator tube that is placed in the duct at a location relative to the radially extending portion of the first portion that is downstream relative to the flow of gas in the duct, and wherein all exhaust gas samples conveyed in the non-sample collecting accumulator are collected by the plurality of sample members having the downstream ends coupled to the common collection location; and

    a sensor to sense the mixed exhaust gas in the accumulator tube.

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