Check patentability & draft patents in minutes with Patsnap Eureka AI!

Oxygen sensor and preparation method thereof

An oxygen sensor and oxygen measurement technology, which is applied in the direction of instruments, scientific instruments, measuring devices, etc., can solve the problems of difficult to maintain a constant reference gas oxygen concentration, oxygen sensor test signal deviation, etc., and achieve the effect of high test signal accuracy

Active Publication Date: 2013-03-06
BYD CO LTD
View PDF9 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problem that it is difficult to maintain a constant reference gas oxygen concentration in the wide-area oxygen sensor in the prior art, which leads to the deviation of the oxygen sensor test signal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Oxygen sensor and preparation method thereof
  • Oxygen sensor and preparation method thereof
  • Oxygen sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The present invention provides an oxygen sensor, such as image 3 As shown, the oxygen sensor includes a heating unit 100 and an oxygen measuring unit 200 located above the heating unit 100 . The heating unit 100 includes a first heating substrate 16, two first insulating layers 15, 13 above the first heating substrate 16, and heating electrodes sandwiched between the two first insulating layers 15, 13 14.

[0026] The oxygen measurement unit 200 includes an exhaust gas diffusion layer, a test electrode 9, a first electrolyte layer 8, a reference electrode 7, a solid reference layer 6, a second insulating layer 5, a second electrolyte layer 4, and an external electrode from bottom to top. 3 and protective layer 1. The exhaust gas diffusion layer includes a test cavity 10 and a diffusion barrier 11, and the test cavity 10 communicates with the vehicle exhaust through the diffusion barrier 11. The gas in the test cavity 10 is in direct contact with the test electrode 9...

Embodiment approach

[0036] In the present invention, the first electrolyte layer 8 is used as the electrolyte layer of the concentration-difference battery on the one hand, and simultaneously it and the second electrolyte layer 4 are jointly used as the electrolyte layer of the pump battery. The transfer of oxygen ions between the external electrode 3 and the reference electrode 7 is strictly controlled to ensure the accuracy of the output voltage signal between the test electrode 9 and the reference electrode 7 . In the present invention, in addition to insulating the outer electrode 3 and the reference electrode 7 by the second insulating layer 5, when there is a large thickness difference between the second electrolyte layer 4 and the first electrolyte layer 8, the gap between the two electrolyte layers can also be effectively increased. The resistance difference makes the reaction between the three electrodes tend to be carried out between the external electrode 3 and the test electrode 9 and ...

Embodiment 2

[0051] In this embodiment, the structure of the oxygen sensor is as follows Figure 6 As shown, it includes a heating unit 100 and an oxygen measuring unit 200, wherein the structure of the oxygen measuring unit 200 is the same as that in the first embodiment.

[0052] As a preferred embodiment of the present invention, in this embodiment, the heating unit 100 further includes a second heating substrate 12 , and the second heating substrate is located above the first insulating layer 13 . On the one hand, the second heating substrate 12 is used to isolate the heating unit 100 and the oxygen measuring unit 200 to prevent the heating unit 100 and the oxygen measuring unit 200 above it from delamination and cracking during the sintering process due to the difference in shrinkage; On the one hand, the second heating substrate 12 can buffer the thermal stress difference on both sides during the heating process of the heating electrode 14, so as to avoid the occurrence of microcrack...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides an oxygen sensor. The oxygen sensor comprises a heating unit, and an oxygen measuring unit positioned above the heating unit, wherein the heating unit comprises a first heating substrate, two first insulating layers on the first heating substrate, and a heating electrode clamped between the two first insulating layers; the oxygen measuring unit comprises a tail gas diffusion layer, a testing electrode, a first electrolyte layer, a reference electrode, a solid reference layer, a second insulating layer, a second electrolyte layer, an outer electrode, and a protecting layer which are arranged from bottom to top in sequence; the tail gas diffusion layer comprises a testing cavity and a diffusion barrier; and the test cavity is communicated with the automobile tail gas by virtue of the diffusion barrier. The invention also provides a preparation method of the oxygen sensor. The oxygen sensor provided by the invention is a dual-cell type wide-scope oxygen sensor, which can be used for monitoring the automobile tail gas with different oxygen concentrations in real time; the concentration of the oxygen in the tail gas can be tested in a wide scope; and the signal accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to an oxygen sensor and a preparation method thereof. Background technique [0002] As one of the important components of the EFI control system, the oxygen sensor plays an important role in the exhaust oxygen concentration test and signal feedback. The current oxygen sensor is divided into two types: tube type and sheet type. Among them, the chip oxygen sensor is divided into concentration difference type, limiting current type and wide area type. The working principle of the concentration oxygen sensor is the Nernst equation. By testing the oxygen partial pressure in the air and exhaust gas, it outputs a corresponding voltage signal; but it only has a significant voltage output signal when the oxygen concentration in the exhaust gas is quite low. . The working principle of the small hole type and porous type limiting current oxygen sensor is based on the diffusion of gas in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N27/419
Inventor 刘梦辉徐斌向其军
Owner BYD CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com