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Vehicle oxygen sensor with quick response and strong anti-interference capability

A vehicle-used oxygen sensor and fast-response technology, applied in the field of oxygen sensors, can solve the problems of intermittent exhaust airflow, unstable airflow, and poor timeliness of signal feedback, and achieve the effects of increasing response speed, uniform heating, and reducing interference

Active Publication Date: 2020-05-08
保定东瑞汽车电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]The response of the sensor is relatively slow. At this time, the signal stability of the sensor is good, and it is not easy to be disturbed by the external airflow. However, the disadvantage is that the response is slow and the timeliness of signal feedback is poor.
[0005]Another contradiction, the sensor responds quickly, but it is easily disturbed by fluctuating airflow, the signal clutter is large, and the stability is not good
[0006] Compared with automobiles, the exhaust airflow of motorcycles is intermittent and impactful. The main feature is that the airflow is unstable, which will easily cause the sensor to fail during the measurement process. Interference signals appear, affecting the accuracy of measurement

Method used

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  • Vehicle oxygen sensor with quick response and strong anti-interference capability
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  • Vehicle oxygen sensor with quick response and strong anti-interference capability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The preparation method of zirconium tube catalytic layer comprises the following steps:

[0041] a. Add fusion additives to the electrode platinum slurry;

[0042] b. Ball milling into a uniform slurry, which is sprayed inside and outside the zirconium tube by a spraying machine, and the coating area ratio of the inner and outer catalytic layers is 0.8; it is made into a green body;

[0043] c. Carry out four-stage sintering to the green body;

[0044] d. The first stage is the preheating stage, the temperature is 100°C, and the duration is 2 hours; it is used to remove the moisture in the green body; the temperature is raised slowly (the purpose is to slowly volatilize the residual moisture in the green body, and countless tiny particles are formed during the volatilization process. Pores, forming a microscopic porous surface) relatively long time of heat preservation is conducive to the complete evaporation of water, on the one hand, more micropores are formed, on th...

Embodiment 2

[0051] The preparation method of zirconium tube catalytic layer comprises the following steps:

[0052] a. Add fusion additives to the electrode platinum slurry;

[0053] b. Ball milling into a uniform slurry, which is sprayed inside and outside the zirconium tube by a spraying machine, and the coating area ratio of the inner and outer catalytic layers is 1; it is made into a green body;

[0054] c. Carry out four-stage sintering to the green body;

[0055] d. The first stage is the preheating stage, the temperature is 100°C, and the duration is 2 hours; it is used to remove the moisture in the green body; the temperature is raised slowly (the purpose is to slowly volatilize the residual moisture in the green body, and countless tiny particles are formed during the volatilization process. Pores, forming a microscopic porous surface) relatively long time of heat preservation is conducive to the complete evaporation of water, on the one hand, more micropores are formed, on the ot...

Embodiment 3

[0063] The preparation method of zirconium tube catalytic layer comprises the following steps:

[0064] a. Add fusion additives to the electrode platinum slurry;

[0065] b. Ball milling into a uniform slurry, which is sprayed inside and outside the zirconium tube by a spraying machine, and the coating area ratio of the inner and outer catalytic layers is 1.2; it is made into a green body;

[0066] c. Carry out four-stage sintering to the green body;

[0067] d. The first stage is the preheating stage, the temperature is 100°C, and the duration is 2 hours; it is used to remove the moisture in the green body; the temperature is raised slowly (the purpose is to slowly volatilize the residual moisture in the green body, and countless tiny particles are formed during the volatilization process. Pores, forming a microscopic porous surface) relatively long time of heat preservation is conducive to the complete evaporation of water, on the one hand, more micropores are formed, on th...

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Abstract

The invention relates to the technical field of oxygen sensors, in particular to a vehicle oxygen sensor with quick response and strong anti-interference capability. The vehicle oxygen sensor comprises a swirling gas flow inlet mode, on one hand, the flow speed of the swirling gas inlet mode is relatively high, the response speed of the sensor is increased conveniently, and on the other hand, unstable gas is disturbed to be mixed in the swirling gas inlet process, and the influence of unstable gas flow disturbance is reduced; a fusion additive raw material is added into the electrode platinumslurry, so that the catalytic electrode layer and the blank body are firmly attached into a whole; high overall strength, sintering in four different stages; in the sintering process, the temperaturerises slowly in a stepped manner; blank body heating uniformity is realized, in addition, the matrix ceramic material does not generate obvious sintering shrinkage, no crack is generated in the ceramic, the raw material of the catalytic layer can be sintered at a relatively low temperature due to the ultrafine powder, and the matrix material does not generate sintering shrinkage at the moment, sothat the surface of the catalytic layer of the material can be ensured to have more catalytic interfaces to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of oxygen sensors, in particular to a vehicle oxygen sensor with fast response and strong anti-interference ability. Background technique [0002] The oxygen sensor is one of the main components for closed-loop feedback control. It is used to detect the combustion status of the engine. It determines the air-fuel ratio by measuring the oxygen content (concentration) in the exhaust gas in the exhaust pipe of the engine. The electronic control unit ECU sends a feedback signal to continuously correct it. The amount of fuel injected makes the air-fuel ratio converge to the theoretical value (λ=1). The quality of its performance directly affects the use of the car. Therefore, the faults of the oxygen sensor should be detected, diagnosed and eliminated in time to ensure the use of the car. [0003] A contradictory problem existing in the existing oxygen sensor: [0004] The response of the sensor is relatively sl...

Claims

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Application Information

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IPC IPC(8): G01N27/409G01N27/407
CPCG01N27/409G01N27/4075Y02T10/40
Inventor 赵旭东张鹤应俊
Owner 保定东瑞汽车电子科技有限公司
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