What is the main function of the carbon canister in a vehicle's emissions control system?

The primary function of the carbon canister in a vehicle's emissions control system is to capture and hold hydrocarbon vapors for later combustion. This process is essential in preventing these vapors from being released directly into the atmosphere, which would contribute to air pollution and smog formation. When the engine is running, these stored vapors are purged from the canister and introduced into the engine's intake, where they are mixed with air and fuel, allowing for cleaner combustion.

This function is a critical part of the vehicle's emissions control efforts, as it reduces the amount of volatile organic compounds (VOCs) that can escape into the environment. By ensuring that hydrocarbons are processed within the engine rather than released, the carbon canister plays a significant role in meeting regulatory emissions standards and protecting air quality.