Nitrogen oxide sensor

A technology of nitrogen oxides and sensors, which is applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of many lead-out lines and affect the measurement accuracy, and achieve the effect of structure optimization and signal accuracy improvement

Inactive Publication Date: 2015-01-07
JINTAN JONSSEN ELECTRIC TECH CORP
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Problems solved by technology

[0004] Existing NO x The sensor is generally an eight-wire system, and ther

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[0019] The present invention will now be described in further detail with reference to the drawings. These drawings are all simplified schematic diagrams, which merely illustrate the basic structure of the present invention in a schematic manner, so they only show the structures related to the present invention.

[0020] Such as figure 1 As shown, a nitrogen oxide sensor of the present invention is composed of seven layers of rectangular substrates. The first layer of substrate 10 to the third layer of substrate 30 from top to bottom form a gas inlet 21, a first chamber 22 and The second chamber 23, the first chamber 22 is provided with an oxygen pump 80, the second chamber 23 is provided with an oxygen measuring pump 90, and a diffusion barrier 24 is provided between the first chamber 22 and the second chamber 23 .

[0021] The electrode of the oxygen pump 80 is composed of a first electrode 81 and a second electrode 82 arranged on the upper and lower surfaces of the first layer ...

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Abstract

The invention relates to a nitrogen oxide sensor. The nitrogen oxide sensor is formed by multiple layers of rectangular substrates, wherein a first layer of substrate, a second layer of substrate and a third layer of substrate from top to bottom form a gas inlet, a first chamber and a second chamber; an oxygen pump is arranged in the first chamber, an oxygen measuring pump is arranged in the second chamber, and a dispersion barrier part is arranged between the first chamber and the second chamber. An electrode of the oxygen pump consists of a first electrode and a second electrode which are arranged on the upper surface and the lower surface of the first layer of substrate, an electrode of the oxygen measuring pump consists of a third electrode and a fourth electrode which are arranged on the upper surface and the lower surface of a third layer of substrate, and a reference gas passage which is communicated with the atmosphere is arranged on the third layer of substrate. By adopting the nitrogen oxide sensor, the six-wire system is realized, the structure is optimized, and a good foundation is laid for the subsequent signal precision.

Description

Technical field [0001] The invention relates to the field of motor vehicle exhaust emission detection, in particular to a nitrogen oxide sensor. Background technique [0002] The exhaust gas produced by burning fuel with air as the oxidant source usually contains a small amount of but noteworthy various nitrogen oxides (NO, NO 2 Etc.), collectively referred to as NO x . NO x It can not only destroy the ozone layer and convert it into acid rain, but also easily react with hydrocarbons or volatile organic compounds in the sun to produce photochemical smog, cause respiratory diseases, and seriously threaten human survival and health, so it is not welcome. [0003] With the development of society, the number of motor vehicles is increasing, and the exhaust of motor vehicles includes a variety of emissions, such as nitrogen oxides and particulate matter. In order to protect the environment and reduce harmful emissions from motor vehicles, emissions are controlled by using exhaust syste...

Claims

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Application Information

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IPC IPC(8): G01N27/407
Inventor 潘登汤忠华刘屿滕卫星陈烈
Owner JINTAN JONSSEN ELECTRIC TECH CORP
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