Exhaust Emissions System - EVAP- Rotary Engines: Operation

With engine off, vapors and liquid fuel flow from fuel tank into vapor separator. Liquid fuel is returned to fuel tank while vapors flow to carbon canister where they are stored until engine is started. Check valve prevents pressure of vacuum from forming in system.

With engine running, fuel vapors stored in canister are purged by fresh air drawn from inlet hole at bottom of canister. Vapors are drawn through air cleaner, into the engine and burned.