An air fuel ratio sensor and a method for making the same

Details An air fuel ratio sensor and a method for making the same An air fuel ratio sensor and a method for making the same

G - Physics

01

F

G01F 9/00 (2006.01) G01N 27/407 (2006.01)

Patent

CA 2212703

TITLE OF THE INVENTION AN AIR FUEL RATIO SENSOR AND A METHOD FOR MAKING THE SAME ABSTRACT OF THE DISCLOSURE An air fuel ratio sensor has a sensor element has a sensing portion and a flange portion in contact with a tapered portion of an accommodation hole of a housing. The sensor element is hot crimped at a hot crimping portion of the housing. At least the hot crimping portion is made of a ferritic stainless steelcomprising a total amount of C and N impurities of 0.03 wt% or below. The average hot crimping temperature of the housing is lower than 1000°C.

Détecteur du ratio d'un mélange air-combustible doté d'un élément sensible, comprenant un dispositif de détection et une bride en contact avec une partie tronconique d'une ouverture d'un boîtier. L'élément sensible est serti à chaud à une partie de sertissage à chaud du boîtier. Cette dernière partie, au moins, est fabriquée d'acier ferritique comprenant une quantité totale d'impuretés de C et de N de 0,03 % en poids ou moins. La température de sertissage à chaud moyenne du boîtier est inférieure à 1000.degrés.C.

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