gf4730p3100mor

Component description for the vent valve

Typ gf · temat 47.30 · wersja 0100 · 2008-03-27

Dotyczy: MODEL 230.477 with ENGINE 275.954 as of Model Year 09 /AEJ 08 model refinement package except code (494) USA version MODEL 230.479 with ENGINE 275.981 as of Model Year 09 /AEJ 08 model refinement package except code (494) USA version

Niedostępne w języku „pl”; wyświetlono w języku Angielski.

Umiejscowienie

Grupa funkcyjna 1 Silnik › 47 Układ paliwowy, zasilanie energią zespołu napędowego › 47.30 Układ odprowadzania oparów paliwa — Seria 230 (modele 477, 479)

Dotyczy też silników/skrzyń biegów: 275 954, 275 981

GF47.30-P-3100MOR

Component description for the vent valve

21.2.08

MODEL 230.477 with ENGINE 275.954
as of Model Year 09 /AEJ 08 model refinement package
except code (494) USA version

MODEL 230.479 with ENGINE 275.981
as of Model Year 09 /AEJ 08 model refinement package
except code (494) USA version

Component description for the vent valve

P47.30-2069-01

View of underfloor behind rear axle

76 Vent valve

Location

The vent valve is located under the fuel tank.

Task

The vent valve aerates and ventilates the fuel tank, and also prevents overfilling.

Design

The vent valve consists of a plastic housing with integrated aeration/vent valves.

Function

Fuel tank aeration

The aeration valve opens at a vacuum of about 1 to 16 mbar and the air and fuel vapors are extracted through the activated charcoal canister.

Fuel tank ventilation

The vent valve opens at an overpressure of about 30 to 50 mbar and the fuel vapors can flow to the activated charcoal canister.

Refueling

The vent valve opening pressure of about 30 to 50 mbar is not reached when the tank cap is removed. The vent line to the activated charcoal canister remains closed off. This causes the fueling nozzle to shut off more quickly, and prevents overfilling.

By overfilling, the fuel can get into the activated charcoal canister and can be suctioned by the engine.