What is the purpose of an alcohol evaporator in a vehicle?

If your vehicle has an alcohol evaporator, its purpose is to decrease the risk of ice forming in air brake valves during cold temperatures. The alcohol evaporator is a component in some air brake systems that introduces a small amount of alcohol into the air lines. This alcohol helps prevent the moisture present in the compressed air from freezing and forming ice within the brake valves and other components in cold weather conditions. By preventing ice formation, the alcohol evaporator helps maintain the functionality and reliability of the air brake system, especially in freezing temperatures.