How does a purge valve work in car?

A purge valve, part of a vehicle's evaporative emission control system, regulates the flow of fuel vapors from the charcoal canister to the engine intake. When the engine is running and conditions are appropriate, the valve opens to allow these vapors to be drawn into the combustion chamber, where they can be burned off. This process helps reduce harmful emissions and improves fuel efficiency. The valve is typically controlled by the engine's computer, which determines when to open or close it based on various factors like engine temperature and load.