Acute angle pressure sensor probe and method
First Claim
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1. A sensor probe located upstream of an exhaust particulate filter and disposed in exhaust gas having carbon particles, the sensor probe comprising:
- a probe tip having an exhaust gas inlet opening and a probe centerline;
a pressure tube fluidly connecting the probe tip with a pressure sensor;
wherein a pipe having a pipe centerline is disposable around the probe tip such that said probe tip protrudes into the pipe;
said pipe configured to channel exhaust gases such that said carbon particles included in the exhaust gas have a momentum vector at said exhaust gas inlet opening that is parallel to said pipe centerline;
wherein the pipe centerline and the probe centerline form an acute angle when the pipe is disposed around the probe tip; and
wherein the probe tip points in a downstream direction of the pipe when the pipe is disposed around the probe tip, such that the probe tip is pointed away from the direction of carbon particles traveling along the momentum vector toward the exhaust particulate filter to reduce entry of carbon particles into said exhaust gas inlet opening.
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Abstract
A sensor probe (116) includes a probe tip (205) having a probe centerline (207). A pressure tube (209) fluidly connects the probe tip (205) with a pressure sensor (115). A pipe (107) having a centerline (201) is connected to the sensor probe (116). The pipe centerline (201) and the probe centerline (207) form an acute angle such that the probe tip (205) points in a downstream direction of the pipe (107).
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Citations
8 Claims
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1. A sensor probe located upstream of an exhaust particulate filter and disposed in exhaust gas having carbon particles, the sensor probe comprising:
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a probe tip having an exhaust gas inlet opening and a probe centerline; a pressure tube fluidly connecting the probe tip with a pressure sensor; wherein a pipe having a pipe centerline is disposable around the probe tip such that said probe tip protrudes into the pipe; said pipe configured to channel exhaust gases such that said carbon particles included in the exhaust gas have a momentum vector at said exhaust gas inlet opening that is parallel to said pipe centerline; wherein the pipe centerline and the probe centerline form an acute angle when the pipe is disposed around the probe tip; and wherein the probe tip points in a downstream direction of the pipe when the pipe is disposed around the probe tip, such that the probe tip is pointed away from the direction of carbon particles traveling along the momentum vector toward the exhaust particulate filter to reduce entry of carbon particles into said exhaust gas inlet opening. - View Dependent Claims (2, 3, 4)
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5. A sensor system for an internal combustion engine, comprising:
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an exhaust pipe having a pipe centerline, an upstream end, and a downstream end; a differential pressure sensor, having a first probe and a second probe disposed on the exhaust pipe; a diesel particulate filter disposed in the exhaust pipe between the first probe and the second probe; wherein the first probe has a first probe tip having a first exhaust gas inlet opening and a first centerline; wherein the first probe tip is disposed in the exhaust pipe at a first location close to the upstream end of the exhaust pipe; wherein said exhaust pipe at said first location is configured to channel exhaust gases such that carbon particles included in the exhaust gas have a momentum vector at said first exhaust gas inlet opening that is parallel to said pipe centerline; wherein the first centerline forms an acute angle with the pipe centerline of the exhaust pipe such that the first tip faces the downstream end of the exhaust pipe, such that the first probe tip is pointed away from the direction of carbon particles traveling along the momentum vector toward the exhaust particulate filter to reduce entry of carbon particles into said first exhaust gas inlet opening. - View Dependent Claims (6, 7, 8)
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Specification