A NOx (Nitrogen Oxide) sensor is a device that is used in vehicles with diesel engines, including some models of Volvo cars, to monitor the amount of nitrogen oxide being emitted from the exhaust.
The NOx sensor works by measuring the concentration of NOx in the exhaust gases using a chemical reaction. When the exhaust gases come into contact with the NOx sensor, the sensor produces an electrical signal that is sent to the engine control module (ECM). The ECM uses this signal to adjust the engine’s fuel injection timing and air-fuel ratio, which can help to reduce NOx emissions.
Most modern Volvo diesel engines use a NOx sensor, including models such as the Volvo XC60, XC90, S60, S90, V60, and V90. The exact type of NOx sensor used can vary depending on the specific model and engine type.
In summary, a NOx sensor is an important component in diesel engine vehicles that helps to reduce emissions of harmful pollutants such as nitrogen oxides.
Volvo trucks also use NOx sensors in their diesel engines to help control emissions of nitrogen oxides. The function of the NOx sensor in Volvo trucks is similar to that in Volvo cars. When the exhaust gases come into contact with the NOx sensor, it produces an electrical signal that is sent to the engine’s electronic control unit (ECU), which uses the signal to adjust the engine’s fuel injection timing and air-fuel ratio to optimize combustion and reduce NOx emissions.
Volvo trucks use various types of NOx sensors, depending on the engine and model. Some of the most common types of NOx sensors used in Volvo trucks include:
- Zirconia-based NOx sensors: These sensors use a ceramic element coated with a thin layer of platinum to detect the concentration of NOx in the exhaust gases.
- Titania-based NOx sensors: These sensors use a titanium dioxide-coated ceramic element to detect the concentration of NOx in the exhaust gases.
- Electrochemical NOx sensors: These sensors use a thin layer of electrolyte to measure the concentration of NOx in the exhaust gases.
Overall, NOx sensors play an important role in helping Volvo trucks meet emissions standards and reduce their environmental impact.