Application of PTFE wire in nitrogen and oxygen sensors

Introduction to nitrogen and oxygen sensors

During the engine's operation, it is used to detect the concentration of nitrogen oxides (NOx) such as N2O, NO, NO2, N2O3, N2O4, and N2O5 in the engine's exhaust pipe. By detecting automobile exhaust, the fuel supply ratio can be better controlled to keep the engine in a state of output power and fuel saving.

The nitrogen oxide sensor consists of a sensor probe, a control module, a connecting plug, and a connecting cable. When the nitrogen-oxygen sensor is working normally, it detects the NOx value in the exhaust pipe in real-time and feeds it back to the ECU/DCU through the CAN bus. ECU does not judge whether the exhaust is qualified by detecting real-time NOx values but rather detects whether the NOx values in the exhaust pipe exceed the standard through a set of nitrogen oxide monitoring programs.
This product's high-temperature line is used on nitrogen oxide sensors, with a temperature resistance of -40 ℃~250 ℃. Existing PTFE materials, silicone rubber materials, and so on.

The application of PTFE wire in nitrogen and oxygen sensors is mainly reflected in its advantages of high-temperature resistance and chemical stability, ensuring the reliability and stability of the sensor in harsh environments.

As an important component of automotive emission control systems, nitrogen and oxygen sensors need to be able to withstand high temperatures and chemical erosion. PTFE wire has become an indispensable material in nitrogen and oxygen sensors due to its excellent high temperature resistance and chemical stability. Specifically, the application advantages of PTFE wires include:

• High temperature resistance: PTFE wires can withstand high temperature environments and maintain stable electrical performance even under extreme temperature conditions, which is crucial for nitrogen and oxygen sensors as it needs to ensure accurate and reliable detection of nitrogen and oxygen levels at high temperatures. ‌
• Chemical stability: PTFE wires have excellent chemical stability and can resist the erosion of various chemicals, including those in fuel. This is particularly important for nitrogen-oxygen sensors as it requires protecting the electronic components inside the sensor from corrosion and damage caused by chemicals in the fuel. ‌
• Electrical performance: PTFE wires have good insulation performance and can maintain stable electrical performance in various harsh environments, ensuring accurate transmission and processing of nitrogen and oxygen sensor signals. ‌

In summary, PTFE wires play a key role in nitrogen and oxygen sensors due to their unique high-temperature resistance and chemical stability. They not only improve the reliability and stability of sensors but also contribute to enhancing the overall performance of automotive emission control systems

The automobile oxygen sensor is a key feedback sensor in the electronic fuel injection engine control system, which is a crucial component for controlling automobile exhaust emissions, reducing environmental pollution, and improving the fuel combustion quality of automobile engines. Due to the increasingly strict emission regulations in every country, it is required to continuously improve the accuracy of oxygen sensor measurement signals to enhance control capabilities. At the same time, it is also required to measure and correct the instantaneous changes in exhaust promptly. Therefore, this has also become a major direction for improving material properties.

The oxygen sensor is a key sensor for electronic control of fuel metering. The characteristics of an oxygen sensor can only be fully reflected and output voltage when the temperature is high (above 300 ° C at the end). Therefore, the selection of wires is also very important. Polytetrafluoroethylene (F4) has become the preferred choice for oxygen sensor wires due to its excellent heat resistance, wear resistance, and corrosion resistance. Conductors need to be plated according to the site and work conditions to facilitate processing, welding, and current carrying. Polytetrafluoroethylene can be used for a long time in an environment of 260 ℃, with a short-term temperature resistance of over 300 ℃, sudden cooling and heating, or alternating cold and hot operations, and stable material properties. Ensure convenient signal transmission and accurate measurement.

ADS CABLE is committed to the research, development, and manufacturing of wires for automotive oxygen sensors, and collaborates with many well-known automotive wiring harness manufacturers to supply oxygen sensors for the entire vehicle. Applicable to NTK, Bosch, Denso (China) Investment Co., Ltd., and Delphi Parker Electrical Systems Co., Ltd. Including Volkswagen models and sedan models, etc