What is the function of an air filter in a reciprocating engine?

The primary function of an air filter in a reciprocating engine is to prevent dirt and debris from entering the engine. As air flows into the engine, it carries with it various particulates that can cause damage or reduce efficiency. The air filter acts as a barrier, trapping contaminants such as dust and dirt, thereby ensuring that only clean air enters the engine combustion chamber.

This is crucial because any foreign particles can lead to increased wear and tear on engine components, reduced performance, and even potential engine failure over time. By maintaining a supply of clean air, the air filter also helps to optimize the combustion process, contributing to better overall engine performance and longevity.

While enhancing fuel efficiency or cooling airflow could be indirect benefits of a clean air supply, the fundamental role of the air filter is to safeguard the engine from harmful debris.