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Oxygen sensor classification and type

April 02, 2022

Oxygen sensor is divided into materials according to the material, divided into: TiO2 type (Titanium Oxygen sensor uses the characteristics of the resistance value of titanium dioxide material changes with the oxygen content in the exhaust gas changes, it is also known as resistance type oxygen sensor) and Zirconia (The basic element of the zirconia oxygen sensor is a zirconia ceramic tube (solid electrolyte), also called zirconium tube).

Divided according to the number of lines behind the oxygen sensor, can be divided into: 2 lines, 3 lines, 4 lines, 5 lines, 6 lines and so on.

According to the oxygen sensor signal characteristics can be divided, can be divided into: narrow domain (transition type), wide area (wideband type). The narrow-area oxygen sensor can only detect whether the air-fuel ratio is rich or lean, or whether the fuel injection is more or less, but it does not know how much the specific fuel is, and how much it is rare. The EFI system uses this signal to make the fuel injection amount rich. Leap back and forth to control the air-fuel ratio around 14.7, which is generally enough. With the increasing strictness of emission monitoring, wide-range sensors emerged. The wide-area oxygen sensor can know the specific air-fuel ratio, how much oil is injected into the cylinder, how much is lean, and the specific ratio of air and fuel.

According to whether or not the oxygen sensor is heated, it can be divided into: heating type and non-heating type. The conventional oxygen sensor is not heated, and all the current use is with heating, otherwise the oxygen sensor can not quickly reach normal working conditions just after starting for a period of time, and does not comply with the state regulations.

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