Fuel Vapor Emission Control System
Modern fuel tank systems with pumps utilize sophisticated EVAP technology to capture and recycle fuel vapors, minimizing environmental impact while maintaining efficiency.
EVAP System Components & Operation
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Sealed Fuel Tank Design
Prevents vapor escape by trapping hydrocarbons that form from temperature changes and fuel agitationVapor Containment
Submerged pump operates within sealed environmentPressure Regulation
Relief valve manages safe pressure levels -
Activated Carbon Canister
Charcoal medium adsorbs fuel vapors routed from the tank through vapor linesPrevents VOC release into atmosphereStores vapors until engine operation
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Vapor Purge System
ECU-Controlled Valve
Precisely times vapor introduction to intakeCombustion Process
Vapors burned as fuel in engineFresh air flow carries vapors from canister to intake manifold for complete combustion -
Pressure Management
Pressure/Vacuum Valve
Prevents excessive tank pressure buildupPump Seals
Maintain system integrity against leaks
This integrated system - combining sealed containment, carbon adsorption, controlled purging, and pressure regulation - effectively converts potential hydrocarbon emissions into usable fuel while meeting stringent environmental standards. Proper maintenance of all components ensures optimal performance and emission compliance.