Extended range air fuel ratio sensor

Details Extended range air fuel ratio sensor Extended range air fuel ratio sensor

G - Physics

01

N

324/25

G01N 27/26 (2006.01)

Patent

CA 1214212

-23- ABSTRACT OF THE DISCLOSURE An exhaust gas oxygen sensor (110) for determining an exhaust gas, air fuel ratio over a wide range of values, including those richer than, leaner than, and near the stoichiometric air fuel value, includes a first (111) and a second (121) electrochemical cell. The two electrochemical cells are spaced from one another and define therebetween a partially enclosed volume. The volume is in communication with the exhaust gases through an opening (126). A first side of each of the first and second electrochemical cells is exposed to the volume. A second side of the first electrochemical cell (111) is exposed to the exhaust gases. A second side of the second electrochemical cell is exposed to a reference atmosphere.

456727

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