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Oxygen sensor

An oxygen sensor and sensor technology, applied in the field of oxygen sensors, can solve problems such as affecting the sealing and waterproof effect of the oxygen sensor, the oxygen sensor cannot work normally, and reducing the service life of the oxygen sensor, and achieves good waterproof and heat dissipation effects, simple structure, and manufacturing. simple craftsmanship

Inactive Publication Date: 2011-09-14
SHANGHAI SAISAI AUTO TECH SERVICE
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the zirconia oxygen sensors used in the market are complex in structure, difficult to manufacture, inconvenient to install, and poor in heat dissipation. These factors will affect the sealing and waterproof effect of the oxygen sensor, reduce the service life of the oxygen sensor, and even make the oxygen sensor malfunction. Work

Method used

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with preferred specific embodiments.

[0037] Such as figure 1 As shown, the oxygen sensor of the present invention includes a sensing element 3, a sensor base 5, a housing 6, and a ceramic body 7; one end of the housing 6 is connected to the sensor base 5, and the other end is connected to the sealed terminal 10, which Ceramic body 7 is built-in. The sensing element 3 is located in the cavity formed by the sensor base 5 and the housing 6, the opening end presses the ceramic body 7 tightly, and the other end is closed, the sensor base 5 and the housing 6 are connected by pressure riveting, the sensor base A third gasket 505 is provided between 5 and the housing 6 to ensure a stable connection between the sensor base and the housing.

[0038] The closed end of the sensor element 3 is provided with a protective cover 2 outside, including an inner protective cover 201 and an outer protective cover 202. ...

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Abstract

The invention provides an oxygen sensor. The oxygen sensor comprises a sensing element, a sensor base and a shell, wherein one end of the shell is connected with the sensor base, and the other end of the shell is connected with a sealing terminal; a ceramic body is arranged at the other end of the shell; the sensing element is positioned in a cavity body formed by the sensor base and the shell; the opening end of the sensing element is pressed against the ceramic body, and the other end of the sensing element is closed; metal platinum serving as electrodes is coated on the inner surface and the outer surface of the sensing element, and the electrodes are contacted with a signal terminal respectively; a protection cover is arranged outside the closed end of the sensing element; an air vent is formed in the protection cover; a protection cover is arranged outside the shell; a waterproof ventilating film is arranged between the protection cover of the shell and the shell; and a soapstone block and a gasket are arranged among the second corner of the sensing element, the sensor base and the shell. The oxygen sensor has a novel structure and good sealing, water prevention and heat dissipation effects, is easy in installation, simple in structure and manufacturing process and low in cost, and can prolong the service life greatly.

Description

technical field [0001] The invention relates to an oxygen sensor, which is mainly used for detecting the oxygen concentration, in particular to an oxygen sensor for detecting the oxygen concentration of automobile tail gas to control the air-fuel ratio of the engine. Background technique [0002] With the rapid development of the automobile industry, the environmental pollution caused by automobile exhaust is becoming more and more serious. Therefore, it has become one of the important research topics to effectively control automobile exhaust and reduce its environmental pollution. On engines that use a three-way catalytic converter to reduce exhaust pollution, the oxygen sensor is an essential component. Once the air-fuel ratio of the mixture deviates from the theoretical air-fuel ratio, the purification ability of the three-way catalyst for CO, HC and NOx will decrease. A sharp decline. Therefore, an oxygen sensor is installed in the exhaust pipe to detect the concentrati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/14
Inventor 陈文娟李丹林道荣周晶麟陈海彬
Owner SHANGHAI SAISAI AUTO TECH SERVICE
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