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The answer, surprisingly, is charcoal.



Its just fibre filters, and charcoal. Thats it. There are systems before it that ensure it only sees vapours, but there is a drain/air inlet on the bottom, plus the line to the tank on the top, and the vac line on top. When the car sees you're cruising in gear, it purges the charcoal canister w/ the purge solenoid, allowing the vacuum of the motor to suck all the vapours out, with the drain being an air inlet, and the material and charcoal acting as a filter.

When its not being purged, positive pressure in tank is regulated by systems before the canister, and the excess vapours are sent there. The drain then acts as an overflow, and the charcoal holds onto the vapours.

Charcoal is a rather safe substance, being mainly carbon. It burns awesome as a result, and gives off primarily CO2.






Yay. I'm edumacated in one more thing

lol, particularly love proof of burning

lol awesome post.

if you ever OD on anything, they'll make you drink a big cup of that mixed with water. looks basically like a cup of black poster paint. just as nasty on the way out too (by the look of it).

Yup, charcoal absorbs crap, poisons, impurities...

Here's an interesting little known fact...

The use activated charcoal to filter things because the structure of the charcoal particals has the greatest surface area per gram of any material. Activated Carbon is made by burning organic material. The burned out cells of the source material gives it hundreds of square meters of surface area per gram.

The amount of activated charcoal in that canister could filter the vapors out of the vented fuel tank air for like 100 years.

that's what they use in respirator cartridges also, it absorbs paint fumes

huh, i always thought it was like a pouch of charcoal, not just ground up pieces

lol, i lit the one I had on fire as well.....not near as cool as I was hoping.