Exhaust gas collector for an exhaust aftertreatment system
First Claim
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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Accused Products
Abstract
An exhaust gas collector for use in a duct of an exhaust gas aftertreatment system includes generally T-shaped tubular sample members having closed upstream ends, downstream ends and spaced apart exhaust collection holes. The downstream ends of the tubular members are fluidly coupled at a common collection location in the center of the duct. The tubular members are positioned in the duct with the exhaust collection holes at locations distributed across a cross sectional area of a duct to collect exhaust samples from across the cross sectional area of the duct. All exhaust gas samples collected by the exhaust gas collector are collected by one of the sample members having a downstream end coupled to the common collection location. A non-sample collecting accumulator tube is fluidly coupled to the common collection location of the tubular sample members. A sensor senses the mixed exhaust gas in the accumulator tube.
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Citations
20 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- a duct having an inlet region, an outlet region, and a cross sectional area;
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16. An exhaust aftertreatment system, comprising:
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a duct having an inlet region, an outlet region, and a cross sectional area; an exhaust gas collector in the duct, including; a common collection location generally centrally located in the duct; a plurality of tubular sample members to collect exhaust gas samples and direct the samples to the common collection location, each sample member including; a first portion fluidly coupled to and extending radially from the common collection location; at least one second portion fluidly coupled to the first portion, the second portion extending from the first portion in a generally circumferential direction in the duct; and spaced apart exhaust collection holes in the first and second portions, wherein the sample members are positioned in the duct with the exhaust collection holes at locations distributed across the cross sectional area to collect exhaust samples from across the cross sectional area of the duct, and all exhaust gas samples collected at the common collection location are collected by the plurality of sample members; an accumulator tube fluidly coupled to the common collection location including; a first portion having a length that extends radially from the common collection location; and a second portion having a length and an open downstream end, wherein the second portion extends axially from the first portion and the open downstream end is located in an exhaust flow; and a sensor to sense the mixed exhaust gas in the second portion of the accumulator tube. - View Dependent Claims (17)
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18. 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 common collection location generally centrally located in the duct;
a plurality of tubular sample members extending from and fluidly coupled to the common collection location, to collect exhaust gas samples and direct the samples to the common collection location, wherein the plurality of tubular sample members includes a portion that extends circumferentially within the duct; and
spaced apart exhaust collection holes in the sample members, wherein the sample members are positioned in the duct with the exhaust collection holes at locations distributed across the cross sectional area to collect exhaust samples from across the cross sectional area of the duct, and all exhaust gas samples collected at the common collection location are collected by the plurality of tubular sample members;
an accumulator tube fluidly coupled to the common collection location, wherein the exhaust samples collected from all of the plurality of sample members are mixed in the accumulator tube; and
a sensor to sense the mixed exhaust gas in the accumulator tube, wherein the sensor is within the duct. - View Dependent Claims (19, 20)
- a duct having an inlet region, an outlet region, and a cross sectional area;
Specification