System and method for operating an exhaust gas sensor system

Details System and method for operating an exhaust gas sensor system System and method for operating an exhaust gas sensor system

2005-06-24

2010-06-22

Larkin, Daniel S (Department: 2856)

Measuring and testing

Gas analysis

Detector detail

C073S023310

Reexamination Certificate

active

07739898

ABSTRACT:
An exhaust gas sensor system includes an inner chamber disposed around a sensor element. The inner chamber has either a cylindrical shape or a frusto-conical shape. The system further includes an outer chamber disposed substantially around the inner chamber to redirect a flow of an exhaust gas stream having an original direction by allowing the exhaust gas stream to strike a surface of the inner chamber to change the original direction of the flow to a substantially perpendicular direction relative to the original direction, then to substantially reverse the substantially perpendicular direction of the flow to create a substantially reversed flow within the inner chamber. Alternately the exhaust sensor system includes a sintered metal filter that prevents exhaust gas particles from fouling a sensor element. The system further includes an electric source coupled to the sintered metal filter to heat the sintered metal filter to a temperature sufficient to remove the exhaust gas particles from the sintered metal filter.

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