Nox Sensor 7422219283,5WK96717B,22219283 for VOLVO

Working principle of NOX sensor
The working principle of the nitrogen-oxygen sensor is based on the REDOX reaction. It contains an electrolyte welded to an ammonia sensor between two electrodes. Under normal working conditions, ammonia reacts with oxygen to form nitrogen oxides. Nitrogen oxides can cause the oxygen electrons to deflect, with one of the electrons flowing toward the electrolyte and causing a current to flow. The sensor''''s circuitry measures the change in current and converts it into nitrogen oxide concentration information. This signal is then transmitted to the ECU to guide the adjustment of the gas mixture during engine combustion to reduce nitrogen oxide emissions.
NOX sensor installation and maintenance
When installing nitrogen and oxygen sensors, ensure that they are correctly positioned and securely connected. The sensor should be installed on the cylinder or exhaust pipe behind the catalyst to accurately measure the NOx concentration in the exhaust gas. At the same time, it is necessary to regularly check whether the sensor''''s connection wire and plug are loose or damaged, and clean the sensor housing and component surface to ensure that it works properly.