Here's a more detailed explanation of how an engine breather works:
1. Pressure Regulation: During engine operation, the combustion process generates pressure inside the cylinders. Some of this pressure leaks past the piston rings and enters the crankcase, creating crankcase pressure. Excessive crankcase pressure can cause oil leaks, hinder engine performance, and even lead to component damage.
2. Breather Vent: The engine breather provides a controlled vent for gases to escape from the crankcase. It is typically located on the valve cover or the side of the engine block.
3. Check Valve: Most engine breathers incorporate a check valve or similar mechanism. The check valve allows gases to escape from the crankcase but prevents outside air from being drawn in. This is important because introducing outside air into the crankcase can contaminate the oil and disrupt engine operation.
4. Filtration: Some engine breathers also include a filter or a filtration system to remove oil droplets and other contaminants from the escaping gases. This helps keep the engine bay clean and reduces the risk of oil leaks.
5. Environmental Regulations: In modern vehicles, engine breathers play a crucial role in meeting environmental emission regulations. By controlling the release of crankcase gases, they prevent the emission of harmful pollutants into the atmosphere.
In summary, an engine breather is a vital component that maintains proper pressure levels within the crankcase, allowing harmful gases to escape while preventing external air from entering. It contributes to engine performance, longevity, and compliance with emission regulations.
