Method and device for detection of fluctuation in air/fuel...

Details Method and device for detection of fluctuation in air/fuel... Method and device for detection of fluctuation in air/fuel...

G - Physics

01

N

324/25

G01N 27/26 (2006.01)

Patent

CA 1060097

Abstract of the Disclosure A sensor comprises a layer of an oxygen ion con- ductive solid electrolyte such as stabilized zirconia, two electrode layers of a catalytic metal such as platinum formed porously on both sides of the electro- lyte, only one of them formed on first side of the electrolyte layer being directly exposable to an exhaust gas stream, and a gas passage arranged to allow the exhaust gas to contact the other side of the electro- lyte layer with a time lag behind the contact of the gas stream with the first side. A fluctuation in the air/fuel ratio of an air-fuel mixture fed to the engine across the stoichiometric ratio can be detected by this sensor since the fluctuation and the aforementioned time lag cause a difference between oxygen partial pressure on one side of the electrolyte layer and that on the other side, resulting in development of an output voltage of the sensor. - 1 -

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