New Invention Profile
| Publication No: | IN202211076054 [India] | Application No: | 202211076054 |
| Title: | Improved oxygen sensor for automobile application and its manufacturing thereof | ||
| Publication Date: | 28-06-2024 | File Date: | 27-12-2022 |
| Inventor(s): | Selvaraj Senthil Kumar; Singanahalli Thippareddy Aruna; Pachaiappan Parthasarathy; Swaminathan Purushothaman | ||
| IPC Classification: | G01N 27/407, G01N 33/00, G01N27/406, F02D41/14, G01N27/30 | ||
| Abstract: | Automobile emission is increasing exponentially with each passing day. Governments around the world are seriously engaged in fixing the cut-off norms for vehicle emissions. In this context, exhaust gas regulation system of automobiles uses oxygen sensor to regulate composition of vehicle exhaust. The present invention discloses a sensing element for narrow band oxygen sensor, its packaging and a process for manufacturing the same. The sensor is constructed with a durable high temperature ceramic such as yttria stabilized zirconia (YSZ). It consists of an in-built reference air channel and a Pt heater. The oxygen sensing element consists of two components, the gas sensing part and an in-built heater to support the sensor operation. The gas sensing part consists of a sensing electrode, oxygen ion conducting electrolyte and a counter electrode placed in the ambient air reference channel. A cavity is formed at the sensing electrode and packed with ceramic diffusion layer to control the soot deposition. The ceramic oxygen ion conducting electrolyte will conduct the oxygen in the form of oxygen ion between the sensing electrode and the reference electrode. However, the electrolyte displays ionic conduction only at high temperature ( 350 0C). In order to improve the response of the sensor, an in-built heater is provided. The heater consists of resistive element, which provides the necessary heat with the help of external power source. When the sensor is deployed in automobile exhaust system, a potential is built between the sensing and reference electrodes based on the exhaust gas concentration. It is measured in terms of voltage signal. Thus, the main objective of the present invention is to provide an oxygen sensor to sense the (air:fuel ratio) more specifically narrow band oxygen sensor with an in-built heater. FIGURE 1 | ||
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