On-board refueling vapor recovery function - GF47.10-P-3004M
MODEL 215, 220 with ENGINE 275.950 with CODE (494) USA version
MODEL 230 with ENGINE 275.951
with CODE (494) USA version
up to Model Year 8
MODEL 216, 221 with ENGINE 275.953
with CODE (494) USA version
up to Model Year 8
MODEL 230 with ENGINE 275.954
with CODE (494) USA version
up to Model Year 8
MODEL 215, 220 with ENGINE 275.980 with CODE (494) USA version
MODEL 230 with ENGINE 275.981
with CODE (494) USA version
up to Model Year 8
MODEL 216, 221 with ENGINE 275.982
with CODE (494) USA version
up to Model Year 8
MODEL 240 with ENGINE 285.950 with CODE (494) USA version
MODEL 240 with ENGINE 285.980 with CODE (494) USA version
Shown on vehicle with fuel tank in luggage compartment
The legislator demands:
- Refueling vapors must be recovered inside the vehicle (ORVR = Onboard Refueling Vapor Recovery).
- Fuel and refueling gases must be separated in order to prevent fuel from flowing into the activated charcoal canister due to inappropriate refueling or a defective nozzle.
To satisfy these requirements, the filler neck is designed as a suction jet pump.
The fuel out of the nozzle accelerates through this in the filler neck and air is suctioned around the nozzle.
As a result of this air intake around the nozzle, refueling vapors are not able to rise up at the filler neck and escape to the atmosphere. They flow to the activated charcoal canister.
The refueling gases are stored in the activated charcoal canister and when releasing regeneration together with fuel gases out of the fuel evaporation control system, are suctioned off and burnt by engine.
- Vehicles with fuel tank in luggage compartment
If the fuel tank is full, the float with the flap (45/2) closes the filler neck at the bottom. This ensures that the refueling nozzle shuts off rapidly and overfilling is largely prevented. A check valve (45/1) prevents the quick increase of fuel in the filler neck.
Two safety valves (rollover valves) are located in the fuel tank (75). If fuel flows to the high mounted safety valves (75/1), they close the vent line to the activated charcoal canister. Through powerful braking, accelerating or cornering the valves can also close briefly.
If an excessively high pressure exists in the activated charcoal canister, the pressure relief valve (77/1) opens. In this special case the removal of pressure is performed via the activated charcoal canister shutoff valve (Y58/4) into the open air.
- Vehicles with fuel tank at frame floor in front of rear axle
The refueling vapors flow along the vent line to the expansion reservoir and on from there to the activated charcoal canister. A filler neck with valves is not necessary.
Ending refueling when the refueling nozzle switches off and the fuel tank is full! On no account overfill fuel tank as a result of refueling nozzle being switched on several times.
Shown on model 230 with engine 275.951
Activated charcoal canister, location/task/design/function GF47.30-P-3102M