What does AQS mean in a car?

[LaSteven]

AQS refers to the Air Quality Sensor in a car. The AQS control module is typically used in the automatic air conditioning systems of high-end vehicle models. The automatic air conditioning can adjust the temperature inside the car and switch between internal and external air circulation. The function of the AQS is to monitor the air quality inside the car, check the level of air pollution, and report the findings to the CPU. Based on this analysis, the automatic air conditioning will then apply the appropriate circulation mode. If the air quality in your area is poor, you can replace the air filter with one that can filter PM2.5 particles. When driving at high speeds, it is not suitable to open the windows for ventilation. In such cases, you can turn on the external circulation function of the air conditioning. When driving in urban areas, especially in heavy traffic or areas with a lot of dust, you should switch to the internal circulation mode. In normal operation, the AQS usually stays in external circulation mode. However, its sensitivity to detecting external air pollution and harmful gases varies as follows: The AQS is highly sensitive to vehicle exhaust. For example, during traffic jams in the city, if the vehicle in front suddenly emits a large amount of exhaust, the intelligent air conditioning can detect it within seconds and automatically switch to internal circulation mode, ensuring the cabin air remains fresh. The AQS has a moderate response to road dust. When driving on dusty roads, the AQS will not switch immediately. It only switches to internal circulation when the dust level becomes severe. This is why frequent driving on sandy or dusty roads requires more frequent cleaning of the air filter. The AQS has a slow response to colorless harmful gases. To ensure good air quality inside the car: Regularly replace the air filter and cabin air filter. As the name suggests, these filters are designed to purify the air. If they are not replaced for a long time, impurities in the air will not be effectively filtered out, so they should be cleaned or replaced periodically. Avoid smoking inside the car. Smoking in the car can cause a sharp rise in the air pollution index. Even with the windows open, it is difficult to completely eliminate the smoke odor, which is not only harmful to the car's interior and air quality but also poses significant health risks. Switch between air circulation modes. During winter driving, it is best not to keep the internal circulation mode on for extended periods. Instead, alternate between internal and external circulation modes. Prolonged use of internal circulation can trap carbon dioxide and other pollutants inside the car, which may cause irreversible harm to health over time. Car air conditioning is an essential comfort feature. The air conditioning system should be cleaned at least once a year to prevent the growth of bacteria, which can cause unpleasant odors when the AC is turned on. The cabin air filter should also be replaced regularly to avoid bacterial growth and foul smells.