What does the term '4 filters' refer to?
3 Answers
Automotive four filters refer to the oil filter, fuel filter, air filter, and cabin air filter. These are also known as the oil strainer, fuel strainer, air strainer, and cabin air strainer. Below is an introduction to their functions: 1. Oil filter function: The oil filter's role is to filter the engine oil, improving its cleanliness and lubricity, thereby reducing engine wear and enabling optimal performance. 2. Fuel filter function: It filters the gasoline from the fuel tank to the engine combustion chamber. 3. Air filter function: It filters out dust and sand particles from the air. 4. Cabin air filter function: It filters out impurities such as dust particles from the air, providing clean air for the car's air conditioning system.
I usually pay a lot of attention to car maintenance. The '4 filters' refer to four key components: the air filter, oil filter, cabin air filter, and fuel filter. For example, the air filter is like the lungs of the car, blocking dust to protect the engine—if it gets dirty, it can affect performance. The oil filter is responsible for cleaning impurities from the engine oil; otherwise, internal parts could wear out. The cabin air filter purifies the air entering and exiting the cabin—since I rely on it for breathing while driving, a dirty one can make the air feel stale. The fuel filter removes impurities like dust or water from the gasoline, ensuring stable fuel system operation. Regularly checking and replacing these filters keeps the car running smoothly and improves fuel efficiency. I usually inspect them every six months, and it works quite well.
I think it's very practical for beginners to learn about the '4 filters', which are the air, oil, cabin (AC), and fuel filters. When changing the air filter, I've seen it myself - it's installed at the engine intake, and when it gets too dusty, it restricts airflow. The oil filter is replaced during oil changes to filter out contaminants and protect the engine core. The cabin filter is located behind the glove box and directly affects in-car air quality - last time I cleaned mine, it was completely covered in dust. The fuel filter is in the fuel line, filtering impurities to prevent clogging. Actually, changing them isn't difficult - you can DIY by buying the parts, which saves money and is convenient.
