What is an Air Filter?
3 Answers
An air filter is a type of filter, also known as an air filter cartridge or air cleaner. Below are the functions and classifications of air filters: Functions of an air filter: To provide clean air for internal combustion engines, preventing the engine from inhaling air containing impurities and particles, which could increase the likelihood of wear and damage. Classifications of air filters: Generally, there are two types: paper and oil-bath. Paper filters are widely used due to their high filtration efficiency, light weight, low cost, and easy maintenance. The filtration efficiency of paper filters can reach over 99.5%, while oil-bath filters typically have a filtration efficiency of 95-96% under normal conditions.
What about the air filter? After driving for over a decade, I think of it as a mask for the engine, specifically designed to filter out dust and debris from the air. The engine needs to breathe fresh air to burn gasoline efficiently. If the filter gets dirty and clogged, not enough air can get through, leading to incomplete combustion, which makes the car sluggish and increases fuel consumption. Once, while driving on the highway, I noticed a lack of acceleration power. After checking, I found the filter was completely clogged with dust. Replacing it immediately improved performance. This part isn’t expensive, and it should generally be replaced every 10,000 kilometers or once a year, especially for vehicles driven in dusty environments like construction sites. Don’t underestimate it—a good filter can also protect the engine from excessive wear, extend its lifespan, and save you a lot of money in the long run. It’s a maintenance item with outstanding cost-effectiveness. In short, regular checks can help avoid unexpected breakdowns.
I started as a beginner learning to drive and initially didn't understand what an air filter does. Simply put, it's installed in front of the engine's air intake and acts as a filtration device. Its main job is to block dirt and debris in the air from entering the engine. Think of the engine like a lung—when it inhales, the filter helps trap dust, leaves, and other particles, allowing the engine to 'breathe' and function properly. If you don't replace it for a long time, the filter gets clogged, making the car harder to start, causing sluggish acceleration or increased noise when driving, and even burning more fuel. I recommend checking your owner's manual—generally, it should be replaced every 10,000 to 20,000 kilometers. Don't delay, or you'll face bigger engine repair issues later. You can also learn to inspect it yourself: pop the hood, look for a round box, and check if it's dirty—easy as that. This is crucial for maintenance because a well-running car means peace of mind on the road.
