Does the car PM2.5 filter need to be replaced?
3 Answers
Car PM2.5 filters do need replacement. Here's an introduction to diesel particulate filters: 1. Function: Diesel particulate filters can effectively reduce particulate emissions by first capturing particulates from exhaust gases and then oxidizing the captured particles to regenerate the filter. Filter regeneration refers to the process where, during prolonged DPF operation, accumulated particulates gradually increase engine backpressure, leading to reduced engine performance. 2. Working process: The diesel particulate filter (DPF) captures particles through surface and internal hybrid filtration mechanisms, such as diffusion deposition, inertial deposition, or linear interception.
As a seasoned driver with years of experience, I believe the car's PM2.5 filter definitely needs regular replacement, especially when the air quality is poor in cities. This filter mainly blocks fine dust particles, and over time it can get clogged, affecting the airflow from the AC. I usually check it every six months or consider replacing it during routine maintenance. If you notice reduced airflow or persistent odors inside the car, it's time for a change. Don’t think saving a little money here is worth it—health is more important. When air pollution is high, and you rely on this filter with windows closed, a failed filter increases your risk of inhaling pollutants. Plus, replacement isn’t difficult; just buy the right model and install it yourself. In short, maintaining your car diligently is taking care of your own health.
From a health perspective, I believe replacing the PM2.5 filter is essential. It blocks harmful particles from entering the car, but its filtering capacity declines over time. If not replaced promptly, the air quality inside the car deteriorates, potentially causing coughing or allergy issues. I usually replace it every 6 months, especially during high smog seasons. Spending a little extra money ensures respiratory safety. While driving, pay attention to airflow changes and test it in recirculation mode. If anything seems off, take action immediately to prevent it from affecting the air conditioning system.
