What are the functions of the three ports on the charcoal canister?

[EmilyLynn]

One connects to the fuel tank to recover fuel vapors, one connects to the charcoal canister solenoid valve leading to the intake manifold, and one is vented to the atmosphere. The following is an introduction to relevant knowledge about the charcoal canister: 1. Installation location: The charcoal canister is generally installed between the fuel tank and the engine. 2. Function: The charcoal canister is actually part of the Evaporative Emission Control System (EVAP), which was introduced to prevent fuel vapors from escaping into the atmosphere after the engine stops running. Since 1995, national regulations have required all newly manufactured vehicles to be equipped with this system. This not only reduces emissions but also improves fuel economy.