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Exhaust Gas Sensor

Automotive Parts
  • #日本特殊陶業
  • #NTK

Overview

This is a central automotive component that senses the state of exhaust gases to ensure safe and efficient engine operation. It contributes to engine abnormality detection, exhaust gas purification, and fuel efficiency. Proprietary technology is utilized to enable fast and accurate sensing while maintaining high durability and reliability even in the harsh environment inside a vehicle.

Exhaust Gas Sensor

Image of how to use an exhaust gas sensor

This diagram illustrates the relationship between the O2 sensors (upstream and downstream) attached to the engine's exhaust pipe, the ECU, and the three-way catalytic converter. The upstream O2 sensor detects the oxygen concentration in the exhaust gas and feeds it back to the ECU, which controls the air-fuel ratio to ensure the three-way catalytic converter functions effectively. Since the introduction of the J-OBDⅡ regulations, it has become mandatory to install an O2 sensor downstream of the catalytic converter as well, to monitor catalytic converter degradation and fine-tune the fuel injection amount. The enlarged view of the area before and after the catalytic converter shows how NOx, CO, and HC in the exhaust gas are converted to N2, CO2, and H2O as they pass through the catalytic converter.

Names of parts of an exhaust gas sensor

A diagram showing the names of the parts of an exhaust gas sensor. From the tip, the parts are: protector, gasket, threaded section, main body, grommet (sealing rubber), lead wire, and connector. The threaded section has anti-seize compound applied, so do not wipe it off before installation. The total length is from the tip of the main body to the connector.

Product Introduction Video

Product video for oxygen sensors
Exhaust gas sensor

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