What is the function of an engine air filter?

[JadeDella]

Air filter is designed to remove particulate impurities from the air. During operation, the engine needs to intake a large amount of air. If the air is not filtered, the suspended dust particles in the air will be drawn into the cylinders, accelerating the wear of piston assemblies and cylinders. Larger particles entering between pistons and cylinders can cause severe "cylinder scoring" phenomenon. Below is relevant information about air filters: 1. Types of air filters: Common air filters in engines mainly include inertial oil-bath air filters, paper dry-type air filters, and polyurethane filter element air filters. The inertial oil-bath air filter undergoes three-stage filtration: inertial filtration, oil-bath filtration, and filter-type filtration, while the latter two types mainly rely on filter elements for filtration. 2. Advantages and disadvantages: Various air filters each have their own pros and cons, but they inevitably face the contradiction between air intake volume and filtration efficiency. With in-depth research on air filters, the requirements for them are becoming increasingly higher.

[TylerDella]

The air filter acts as a barrier to prevent dust and impurities in the air from entering the engine, much like a mask for the engine. As someone who frequently focuses on car maintenance, I've found this component to be absolutely crucial—it protects internal parts like cylinders and pistons from wear and ensures cleaner combustion. If not replaced regularly, a clogged filter restricts airflow, leading to decreased power, increased fuel consumption, and even potential knocking or overheating. I recommend checking it every 10,000–20,000 kilometers, with more frequent replacements for those driving on dusty roads. It's a simple DIY job: just buy a new filter for a few dozen bucks and swap it out. This not only extends the engine's lifespan but also avoids costly overhauls. After replacement, the car runs smoother with noticeably quicker throttle response.

[McCody]

I've personally experienced the importance of an air filter while driving. Its main function is to filter out small particles in the air, such as dust and insects, preventing them from contaminating the engine's interior. With cleaner air, combustion becomes more efficient, resulting in a quieter and smoother engine operation, as well as improved fuel economy and reduced emissions. Once, I delayed replacing it and noticed a lack of power when accelerating and difficulty climbing hills. After installing a new filter, everything returned to normal. This reminded me of the importance of regular maintenance—typically replacing it once a year, which is affordable and can be purchased online. Neglecting it can accelerate engine wear, leading to exorbitant repair costs, and it also contributes to environmental protection.

[DeEzra]

The air filter protects the engine by filtering out dust and sand to prevent them from entering the combustion chamber, ensuring smooth power output. I've noticed it also keeps the air conditioning system running cleaner, indirectly improving driving comfort. Regularly replacing the filter ensures peace of mind when driving on highways.