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Wide-band oxygen sensor chip and manufacturing method thereof

The technology of an oxygen sensor and its manufacturing method is applied in the field of wide-range oxygen sensor chip and its manufacturing, wide-range oxygen sensor chip and its manufacturing field, which can solve the problem that engine fuel control is not very accurate, and the degree of concentration is not known, etc. problems, achieve the effect of preventing cracking and shrinkage mismatch, improving bond strength and yield, and ensuring signal sensitivity

Inactive Publication Date: 2014-05-28
SUZHOU INDAL PARK VOLKSELEKTRONIK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the engine needs to be controlled with lean mixture or rich mixture, this type of oxygen sensor is incapable, so that the fuel control of the engine cannot be very accurate
With the deepening of people's awareness of environmental protection and the continuous improvement of the requirements for automobile exhaust emissions, the traditional chip oxygen sensor can no longer meet the requirements of high emission standards, because it can only know the concentration of the gas qualitatively, but not the concentration. and the engine air-fuel ratio control system of this type of oxygen sensor can only give feedback based on the equivalent air-fuel ratio value, while the wide-area oxygen sensor detects the oxygen content in the engine exhaust and sends it to the electronic control unit (ECU) Deliver the corresponding voltage signal to reflect the leanness and richness of the air-fuel mixture ratio

Method used

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  • Wide-band oxygen sensor chip and manufacturing method thereof
  • Wide-band oxygen sensor chip and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Oxygen sensor chip preparation

[0038] 1) Cast film preparation: Weigh 8mol% YSZ powder according to the ratio, put it into a ball mill tank, add solvent absolute ethanol, dispersant triethanolamine, binder polyvinyl butyral, plasticizer in sequence Dibutyl phthalate and polyethylene glycol were ball milled in a ball mill tank for 25 hours to make casting slurry;

[0039] 2) Using the tape casting process, use a scraper to scrape a uniform film with a thickness of 250 μm, dry it in a fully automatic casting machine at a temperature of 70°C for 3 minutes, and cut to obtain the film;

[0040] 3) Fabrication of the germ layer: use the cast diaphragm obtained in step 2), stack it to a thickness of 500 μm, compact it with a press table, and cut it into pump battery dielectric layers, reference battery dielectric layers, air chamber layers and substrate layers;

[0041] 4) Print platinum ring electrodes on the front and back of the pump battery medium layer prepared in step...

Embodiment 2

[0051] Oxygen sensor chip preparation

[0052] 1) Cast film preparation: Weigh 8mol% YSZ powder according to the ratio, put it into a ball mill tank, add solvent absolute ethanol, dispersant triethanolamine, binder polyvinyl butyral, plasticizer in sequence Dibutyl phthalate and polyethylene glycol were ball milled in a ball mill tank for 30 hours to make casting slurry;

[0053] 2) Using the casting process, use a scraper to scrape a uniform membrane with a thickness of 300 μm, dry it in a fully automatic casting machine at a temperature of 70°C for 4 minutes, and cut to obtain the membrane;

[0054] 3) Fabrication of the germ layer: use the cast diaphragm obtained in step 2), stack it to a thickness of 500 μm, compact it with a press table, and cut it into pump battery dielectric layers, reference battery dielectric layers, air chamber layers and substrate layers;

[0055] 4) Print platinum ring electrodes on the front and back of the pump battery medium layer prepared in s...

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Abstract

The invention discloses a wide-band oxygen sensor chip and a manufacturing method thereof. The wide-band oxygen sensor chip consists of a porous ceramic protective layer (1), a pump battery upper electrode (2), a pump battery dielectric layer (3), a pump battery reference electrode (4), a reference battery dielectric layer (5), a reference battery electrode layer (6), a reference air chamber layer (7), a gradient connecting layer (8), an upper substrate layer (9), a heating circuit layer (10) and a lower substrate layer (11) which are superposed sequentially, wherein the gradient connecting layer (8) adopts a gradient composite material transition technology, so the combination problem between heterogeneous materials is effectively solved; the pump battery dielectric layer is provided with a diffusion hole and upper and lower corresponding annular electrodes; a small diffusion cavity is formed in the reference battery dielectric layer and a porous ceramic filler supporting technology is adopted in the small diffusion cavity, so that formation of a cavity body and sensitivity of a signal are guaranteed; all the layers are positioned, superposed and cut sequentially by a tape casting and silk-screen printing combined method to manufacture a green body of the oxygen sensor chip and then the green body is sintered to manufacture the compact oxygen sensor chip.

Description

technical field [0001] The invention relates to a wide-range oxygen sensor chip core and a manufacturing method thereof, in particular to a wide-range oxygen sensor chip core for controlling the air-fuel ratio of an automobile and a manufacturing method thereof, and belongs to the field of special functional inorganic non-metallic materials and oxygen sensor manufacturing . Background technique [0002] The oxygen sensor is an important part of the fuel feedback control system of the automobile engine, and plays a very important role in the air-fuel ratio control. There are three main types of chip oxygen sensors used in vehicles: concentration difference type, limiting current type and wide area type. Since the concentration type and limiting current type oxygen sensors have great limitations in testing a wide range of air-fuel ratios, it is an inevitable trend to develop a new type of wide-range oxygen sensor with full air-fuel ratios in the future. [0003] The working ...

Claims

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Application Information

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IPC IPC(8): G01N27/41
Inventor 陈荣浪胡云明曾咏平
Owner SUZHOU INDAL PARK VOLKSELEKTRONIK
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