The activated carbon absorber system keeps these hydrocarbon vapors out of the atmosphere.
Fuel vapors enter from the highest point in the tank through a pressure reducing valve, depending on the throttling, into the activated carbon absorber.
Activated charcoal absorbs these gases like a sponge.
When driving and active lambda control (warm engine), the engine control unit opens solenoid valve 1 of the activated charcoal canister, (also regenerating valve), depending on load and speed. The opening time depends on the incoming signals.
During the cleaning process (activated carbon regeneration) Vacuum in the intake manifold sucks in clean air through the canister vent. The fuel vapors and clean air contained in the activated carbon at a certain point in time are dosed and then burned in the engine.
The pressure reducing valve prevents the suction of fuel vapors from the tank when the solenoid valve of the activated charcoal absorber is open and there is a vacuum in the intake manifold. Thus, it ensures preferential emptying of the absorber.
In the absence of power (e.g. break in electrical circuit) solenoid valve is closed. In this case, the absorber is not emptied.
Note: Hose connections are secured with spring and clamp clamps.
Note: It is recommended to use spring clamp pliers to install spring clamps
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