Conical double cell wide-band oxygen sensor and manufacture method thereof

An oxygen sensor and dual-battery technology, which is applied in the field of oxygen sensors, can solve the problems of difficult packaging of sensors, large thermal efficiency loss, and high process difficulty, and achieve the effects of reduced cold start time, increased cold start speed, and large thermal efficiency loss
CN103837589AActive Publication Date: 2014-06-04CHANGZHOU LAMBDA ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGZHOU LAMBDA ELECTRONICS
Publication Date
2014-06-04

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Abstract

The invention relates to the technical field of oxygen sensors, and particularly relates to a conical double cell wide-band oxygen sensor and a manufacture method thereof. The sensor comprises a conical zirconium oxide tube and a conical heating rod, wherein a reference air electrode is arranged on the inner surface of the conical zirconium oxide tube, a measuring electrode, a mixing cavity and a diffusion layer are sequentially arranged on the outer surface of the conical zirconium oxide tube, the reference air electrode arranged on the inner surface of the conical zirconium oxide tube and the measuring electrode arranged on the outer surface of the conical zirconium oxide tube form a concentration cell unit, on the basis, a compact zirconium oxide coating is arranged so as to seal the interior, and a diffusion hole is reserved, a pump cell external electrode is arranged on the outer surface of the compact zirconium oxide coating, the pump cell external electrode and the measuring electrode wrapped in the compact zirconium oxide coating form a pump cell unit, and a porous external electrode protective layer is arranged on the outer surface of the compact zirconium oxide coating. According to The conical double cell wide-band oxygen sensor, the heating efficiency of sensors can be effectively improved, and the volume of like products can be remarkably reduced.
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Description

technical field

[0001] The invention relates to the technical field of oxygen sensors, in particular to a conical double-battery wide-area oxygen sensor and a manufacturing method thereof. Background technique

[0002] With the improvement of automobile exhaust emission regulations and engine control technology, the traditional concentration-type oxygen sensor cannot meet the requirements of the engine control system in terms of measurement accuracy and measurement range. Therefore, the dual-battery wide-area oxygen sensor based on the principle of limiting current Came into being. The existing dual-battery wide-area oxygen sensors are all chip structures. Patent 201010616977.8 discloses a tubular dual-battery wide-area oxygen sensor and its manufacturing method. It includes an inner zirconia tube, an outer zirconia tube, a heating rod and a closed-loop controller. The outer surface of the inner zirconia tube matches the inner surface of the outer zirconia tube. There is ...

Claims

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