Hyundai Santa Fe (DM): Description and Operation
Description
Evaporative Emission Control System prevents fuel vapor stored in fuel
tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel
tank, the vapor passes through vent hoses or tubes to canister filled with charcoal.
The canister temporarily holds the vapor in the charcoal. If ECM determines
to draw the gathered vapor into the combustion chambers during certain operating
conditions, it will vacuum into intake manifold.
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Operation
Evaporative System Monitoring
Evaporative And ORVR Emission Control System
This system consists of below items;
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Fill vent valve
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Fuel shut-off valve
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Fuel cut valve (for roll over)
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Two way valve (pressure/vacuum relief)
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Fuel liquid/vapor separator which is installed beside the filler
pipe
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Charcoal canister which is mounted under the rear floor LH side
member and protector
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Tubes and miscellaneous connections
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While refueling, ambient air is drawn into the filler pipe so as not to
emit fuel vapors in the air. The fuel vapor in the tank is then forced to flow
into the canister via the fill vent valve. The fuel liquid/vapor separator isolates
liquid fuel and passes the pure vapor to the charcoal canister.
While the engine is operating, the trapped vapor in the canister is drawn
into the intake manifold and then into the engine combustion chamber. According
to this purge process, the charcoal canister is purged and recovers its absorbing
capability.
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1. Fuel Filler Cap 2. Fuel Filler Pipe 3. Fuel Shut-OFF Valve 4. Fuel Tank 5. ORVR Valve 6. 2-Way & Cut Valve 7. Evaporative Hose |
8. Evaporative Hose 9. Canister 10. Canister Close Valve (CCV) 11. Fuel Feed Line 12. Fuel Tank Pressure Sensor (FTPS) 13. Purge Control Solenoid Valve (PCSV) |
Schematic Diagrams
Schematic Diagram Canister Canister is filled with charcoal and absorbs evaporated vapor in fuel tank. The gathered fuel vapor in canister is drawn into the intake manifold by the ECM/PCM when appropriate ...
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