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Home >> Saab >> 2001 >> 9-5 Wagon (9600) L4-2.3L Turbo (B235) >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Evaporative Emissions System >> Evaporative Emission Control Canister >> Description and Operation

Evaporative Emission Control Canister: Description and Operation




Evaporative Emission Canister

The evaporative emission canister is located on top of the tank and comprises a canister filled with special carbon pellets. Carbon pellets are used to obtain as little back pressure as possible from the emission canister. Evaporated hydrocarbons from the tank pass through a line to the emission canister. When refuelling, the hydrocarbons and air from the tank are evacuated via a line to the emission canister, which absorbs the hydrocarbons.

Separate lines connect the evaporative emission canister with the fuel tank, EVAP purge valve and shut-off valve. When the engine starts, air is drawn in through the shut-off valve to the emission canister and then via the purge valve into the intake manifold. The hydrocarbons a taken with it and are burned in the engine.

The evaporative emission canister absorbs approx. 80 g hydrocarbon for each full tank. The emission canister is purged while the car is being driven, the time it takes depends on the driving. The emission canister can absorb a maximum of approx. 120 g hydrocarbon.







Fuel Tank:




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