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Portable tube-type wide domain oxygen sensor and manufacturing method thereof

An oxygen sensor and portable technology, which is applied in the field of portable tubular wide-area oxygen sensor and its production, can solve the problems of great influence on product quality, slow start-up speed, uneconomical, etc., and achieves improved heating efficiency and start-up speed, The effect of reducing the cost of use and increasing the accuracy

Active Publication Date: 2013-08-21
苏州禾苏传感器科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multi-layer lamination and co-firing process can obtain a wide-area oxygen sensor with rapid response, but the disadvantage is that the yield of this process is not high, and the slurry process has a great impact on the quality of subsequent products. a large number of defective products
The technical features disclosed in this patent show that a gap that is difficult to seal will be left at the junction of the inner and outer U-shaped zirconia tubes, and the thermal expansion rates of the inner and outer U-shaped zirconia tubes are not completely the same, which will cause the cracks to expand, resulting in air entering the chamber and exhaust gas Mixed with each other, so that the output of the oxygen sensor seriously deviates from the normal value
In addition, in this patent, the heating electrode is inserted into the tube to provide the temperature necessary for the conduction of oxygen ions. There is a certain gap between the heating electrode and the tube, and the gap is air, which is a poor conductor of heat, so this solution The heating efficiency is low, and the starting speed is slow. In order to achieve sufficient heating efficiency, a high-power heating voltage is often required, which is also uneconomical.

Method used

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  • Portable tube-type wide domain oxygen sensor and manufacturing method thereof
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  • Portable tube-type wide domain oxygen sensor and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A method for manufacturing a portable tubular wide-area oxygen sensor, comprising the following steps:

[0034] (1), Injection molded U-shaped zirconia tube: ZrO by mass percentage 2 65%, grain growth control 12% and injection molding flow agent 23% are carried out batching, and then injection molding obtains U-shaped zirconia tube green body, and described grain growth control is Al 2 o 3 ;

[0035] (2) After the U-shaped zirconia tube green body is cooled down with cold water, it is extracted in a trichlorethylene solvent for 2 hours, and the extraction temperature is 100°C;

[0036](3) After the extraction is completed, drill a small hole with a diameter of 100 microns on the U-shaped zirconia tube;

[0037] (4) Printed electrodes: Print the internal electrode 2 of the pump battery on the inner side of the small hole 6 with micro-pen direct writing technology, print the internal electrode 3 of the measurement battery on the inner wall of the U-shaped zirconia tube...

Embodiment 2

[0041] A method for manufacturing a portable tubular wide-area oxygen sensor, comprising the following steps:

[0042] (1), Injection molded U-shaped zirconia tube: ZrO by mass percentage 2 70%, grain growth control 10% and injection molding flow agent 20% for batching, and then injection molding to obtain a U-shaped zirconia tube green body, the grain growth control is Al 2 o 3 ;

[0043] (2) After the U-shaped zirconia tube green body is cooled down with cold water, it is extracted in a trichlorethylene solvent for 3 hours, and the extraction temperature is 80°C;

[0044] (3) After the extraction is completed, drill a small hole with a diameter of 200 microns on the U-shaped zirconia tube;

[0045] (4) Printed electrodes: Print the internal electrode 2 of the pump battery on the inner side of the small hole 6 with micro-pen direct writing technology, print the internal electrode 3 of the measurement battery on the inner wall of the U-shaped zirconia tube, and then fill th...

Embodiment 3

[0049] A method for manufacturing a portable tubular wide-area oxygen sensor, comprising the following steps:

[0050] (1), Injection molded U-shaped zirconia tube: ZrO by mass percentage 2 75%, grain growth control 5% and injection molding flow agent 20% for batching, and then injection molding to obtain a U-shaped zirconia tube green body, the grain growth control is Al 2 o 3 ;

[0051] (2) After the U-shaped zirconia tube green body is cooled down with cold water, it is extracted in a trichlorethylene solvent for 5 hours, and the extraction temperature is 60°C;

[0052] (3) After the extraction is completed, drill a small hole with a diameter of 300 microns on the U-shaped zirconia tube;

[0053] (4) Printed electrodes: Print the internal electrode 2 of the pump battery on the inner side of the small hole 6 with micro-pen direct writing technology, print the internal electrode 3 of the measurement battery on the inner wall of the U-shaped zirconia tube, and then fill the...

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PUM

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Abstract

The invention discloses a portable tube-type wide domain oxygen sensor and a manufacturing method thereof. The portable tube-type wide domain oxygen sensor comprises a U-shaped zirconium oxide pipe, wherein the inner wall of the U-shaped zirconium oxide pipe is provided with an inner electrode of a pump battery and an inner electrode of a measurement battery; the outer wall of the zirconium oxide pipe is provided with an outer electrode of the pump battery and an outer electrode of the measurement battery; the side wall of the U-shaped zirconium oxide pipe is provided with a hole used for communicating the inner electrode of the pump battery with the outer electrode of the pump battery; and Al2O3 porous diffusion barrier is filled in the hole. The portable tube-type wide domain oxygen sensor has the beneficial effects that the needed U-shaped zirconium oxide pipe is molded once by adopting an injection molding technology, the electrodes, a coating and the like are printed on a green body of the U-shaped zirconium oxide pipe, and the tube-type wide domain oxygen sensor can be formed by one-step sintering, so that the heating efficiency and the starting speed of the sensor are improved, the using cost is lowered, and the accuracy of the wide domain oxygen sensor is improved; and the portable tube-type wide domain oxygen sensor has the characteristic of simple structure and is convenient to use.

Description

technical field [0001] The invention relates to a portable tubular type wide-area oxygen sensor and a manufacturing method thereof, belonging to the technical field of automobile oxygen sensors. Background technique [0002] With the continuous improvement of automobile exhaust emission requirements, the traditional switch-type oxygen sensor can no longer meet the requirements of high emission standards, and has been replaced by a linear wide-area oxygen sensor with higher control accuracy. [0003] Universal Exhaust Gas Oxygen Sensor (UEGO for short) can provide accurate air-fuel ratio feedback signal to ECU, so that ECU can accurately control fuel injection time, so that the concentration of air-fuel mixture in the cylinder always maintains the theoretical air-fuel ratio. The use of the wide-area oxygen sensor improves the control accuracy of the ECU, maximizes the role of the three-way catalytic converter, and more effectively reduces the emission of harmful gases. The r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/41
Inventor 徐斌胡延超李敏
Owner 苏州禾苏传感器科技有限公司