What type of emission system controls the release of fuel vapors?

The Evaporative Emission Control System (EVAP) is specifically designed to prevent the release of fuel vapors from the fuel system into the atmosphere. This system captures and stores these vapors in a charcoal canister, which allows the vapors to be routed to the engine to be burned during combustion, thereby reducing harmful emissions. The design of the EVAP system helps to ensure that fuel vapors do not escape into the environment, making it a critical component for complying with environmental regulations regarding air quality and reducing overall vehicle emissions.

In contrast, the other systems listed focus on different aspects of emissions control. The Exhaust Gas Recirculation System mainly reduces nitrogen oxide emissions by recirculating a portion of the engine's exhaust back into the intake manifold. The Positive Crankcase Ventilation System is designed to control harmful emissions from the crankcase by rerouting gases that would otherwise escape into the atmosphere back to the combustion chamber. The Catalytic Converter System is crucial for converting toxic gases from the exhaust into less harmful emissions but does not specifically target fuel vapors from the fuel system. Each of these systems plays a vital role in overall vehicle emissions control, but only the EVAP specifically addresses the management of fuel vapors.