Oxygen sensor for internal combustion engine
An oxygen sensor and internal combustion engine technology, applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of complex design schemes and difficult to achieve, and achieve the effect of reducing the accuracy of parts, simplifying the packaging process, and reducing the number of parts
Active Publication Date: 2014-02-05
苏州工业园区传世汽车电子有限公司
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It can be seen that the design scheme is complex and difficult to implement
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[0017] Such as figure 1 As shown, the oxygen sensor for an internal combustion engine with a new package structure, a cylindrical waterproof and breathable PTFE film 20 and an elastic assembly 30 are arranged in the wire outlet end 101 of the outer cylinder 10 of the sensor, and the PTFE film 20 is sleeved outside the elastic assembly 30 , the sensor wire 40 passes through the elastic assembly 30, and at least one contact with the rubber part of the elastic assembly 30, the middle area of the elastic assembly 30 is provided with an assembly air hole 303, and the assembly air hole 303 is connected to the reference cavity of the sensor 50 are connected to form a ventilation channel. At least one air hole 101A is opened on the side wall of the wire outlet end 101. There is at least one riveting mark 101B on each side of the air hole 101A. The riveting mark 101B is located on both sides of the air hole 101A. At least one riveting mark 101B is provided on each side of the vent ho...
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The invention relates to an oxygen sensor for an internal combustion engine. A cylindrical PTFE (Polytetrafluoroethylene) film and an elastic combination body are arranged in the lead outlet end of an outer cylinder of the sensor, the PTFE film is sleeved outside the elastic combination body, a sensor lead penetrates through the elastic combination body and at least one part of the lead is in contact with a rubber member of the elastic combination body, a combination body air hole is formed in a middle region of the elastic combination body, and is communicated with a reference cavity of a sensor, at least one air hole is formed in the side wall of the lead outlet end, at least one riveting trace is arranged at each side of the air hole, and the riveting traces are positioned at two sides of the air hole. The functions of sealing the lead outlet end and arranging a waterproof vent film are realized through once riveting. Compared with the prior art, the oxygen sensor has the advantages of reducing the quantity of parts, lowering the precision of the parts, simplifying the packaging process, and promoting the development of an oxygen sensor packaging process. Two riveting traces are formed through the riveting, and are realized through the once riveting; the two passes riveting traces can be respectively formed through two times of riveting.
Description
technical field [0001] The invention relates to an oxygen sensor for an internal combustion engine. Background technique [0002] The oxygen sensor is used for closed-loop control of the engine, so as to ensure that the emissions of HC, CO and NOx during the life of the vehicle meet the regulatory requirements. This has played a vital role in reducing vehicle pollutant emissions and reducing environmental pollution. The zirconia oxygen sensor utilizes the solid electrolyte characteristics of zirconia, that is, zirconia is conductive to oxygen ions at high temperatures, so that when the oxygen concentration on both sides of zirconia, that is, the oxygen partial pressure, is different, oxygen ions will flow from one to the other. The effect of side-to-side migration, thereby producing a voltage signal. Specifically, this oxygen ion conductivity of zirconia can be expressed by the Nernst equation: [0003] Among them, R is the ideal gas constant; F is the Ferrari constant;...
Claims
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IPC IPC(8): G01N27/409
Inventor 陈珍强
Owner 苏州工业园区传世汽车电子有限公司