Automobile chip wide domain oxygen sensor using standard signal output

Abstract

The invention provides an automobile chip wide domain oxygen sensor using standard signal output, which consists of a porous protective layer, an oxygen pump external electrode, an oxygen pump matrix layer, an oxygen pump internal electrode, a reaction matrix layer, an inner reaction electrode layer, a multilayer ceramic gas exchange layer, an upper heating matrix layer, a heating electrode layer, a lower heating matrix layer and heating electrode pins, wherein, the oxygen pump matrix layer and the reaction matrix layer are zirconium oxide substrates stabilized by yttrium oxide; the multilayer ceramic gas exchange layer, the upper heating matrix layer and the lower heating matrix layer are substrates made by compounding aluminum oxide, magnesium oxide and barium oxide according to a certain proportion; and the layers are printed with electrodes, laminated and integrated together by a sintering mode. The substrates made from the aluminum oxide, the magnesium oxide and the barium oxide has good insulating property and the same sintering temperature and thermal expansion coefficient as zirconium oxide, thus lowering possibility that the layers of the automobile oxygen sensor are cracked and disabled owing to thermal shock; and the substrates have good insulating strength, thus reducing interference of voltage of heating electrodes on a signal circuit.

Description

【Technical field】 [0001] The invention relates to an automobile component, in particular to an oxygen sensor for an automobile. 【Background technique】 [0002] Vehicle emissions are a major factor in modern pollution, and developed countries have long enacted strict emission regulations. my country currently enforces the National III emission standards, and many large cities have already implemented the National IV emission standards. To meet emission requirements, the engine must use electronic fuel injection technology. The oxygen sensor is a key component in gasoline engine electronic fuel injection technology, which controls the fuel injection quantity by detecting the oxygen content in the exhaust gas of the automobile engine. To fully meet the National III and stricter emission requirements, it is also required to use an oxygen sensor to monitor the working status of the entire engine system, so an oxygen sensor needs to be installed after the three-way catalysis. ...

AI Technical Summary

Problems solved by technology

The oxygen sensor will age with the prolongation of use time. During the aging process, the signal will drift, and the signal drift will reduce the accuracy of the oxygen sensor, thereby reducing the accuracy of EFI control, resulting in non-compliance of emissions

The service life of the oxygen sensor is difficult to guarantee, which will inevitably increase the maintenance and replacement cost of the user

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