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Gas sensor

A gas sensor and sensor technology, which is applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of high installation and manufacturing costs, the inability to realize the miniaturization of size and structure, and many parts, so as to reduce the installation and manufacturing costs and avoid laser welding or Hemming process, the effect of fewer parts

Active Publication Date: 2008-12-03
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Gas sensors with this structure, on the one hand, have relatively high installation and manufacturing costs, and on the other hand, there are many parts, which makes it impossible to miniaturize the size and structure

Method used

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Embodiment Construction

[0031] Such as Figure 8 As shown, the gas sensor of the present invention includes a short sensor 10, a spring clip 20, and a wire harness assembly 30;

[0032] Such as image 3 , Figure 4 As shown, the short sensor 10 includes a metal protective cover 11, a metal sensor seat 12, an exhaust side bushing 13, a seal 14, a reference side bushing 16, and a ceramic sensing element 17;

[0033] The protective cover 11 includes an extension part 112 , a fixing part 113 , and an umbrella part 114 . The outer diameter of the fixing part 113 is larger than that of the extension part 112 . The outer surface of the fixing part 113 and the inner surface of the top of the sensor seat 12 are interference fit.

[0034] The protective cover 11 is fixed on the top of the sensor base 12 through the fixing portion 113 , the extension 112 of the protection cover 11 protrudes from the top of the sensor base 12 , and the extension 112 is provided with a plurality of through holes 111 . Since th...

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Abstract

The invention discloses a gas sensor including a short sensor (10), a spring buckle (20) and a bunch assembly (30). A plurality of contact springs are arranged in a protective sleeve (31) of the bunch assembly (30), wherein each pair of the contact springs is mutually and relatively fixed; a sensing element (17) of the short sensor (10) is provided with contact disks (171), the contact disks (171) are arranged among the contact springs (33), and the contact disks (171) are directly contacted with the contact springs (33). The gas sensor has fewer parts, low installation and production cost, and great application value; and the gas sensor is easy to realize miniaturization of size and structure.

Description

technical field [0001] The invention relates to an electrical part for an internal combustion engine, in particular to a gas sensor. Background technique [0002] Gas sensors, such as oxygen sensors, are important components in the engine management system. They are installed in the exhaust system of the internal combustion engine to sense the concentration of oxygen in the exhaust gas and realize the emission control of pollutants. The oxygen sensor is installed in the exhaust system of the engine, the working environment is relatively harsh, and the temperature and mechanical stress are relatively high during the service life. Therefore, stable and reliable mechanical design becomes the key to the success of the oxygen sensor design. [0003] In the existing Nernst galvanic oxygen sensor, the inner electrode needs to provide a standard reference cavity, which is generally the atmosphere. The oxygen partial pressure of the standard reference gas in the reference chamber mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/407
Inventor 杨玉海张笑冬杨曾
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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