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AT-PZEV question

Discussion in 'Gen 2 Prius Technical Discussion' started by rigormortis, Sep 18, 2007.

  1. rigormortis

    rigormortis Active Member

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    i looked at the chart in the knowledge base but it wasnt much help but what
    actually happens to the build up of gasoline vapors. does the prius actually
    burn all of it ? while gas is being pumped, the vapors go underground for later pickup
    at the gas station, and when you open the gas cap there is no whoosh
    of some of the vapors due to the anti siphon vacuum thingy
    so what happens to the actual gasoline vapors?


    maybe all of them go underground, dont know
     
    #1 rigormortis, Sep 18, 2007
  2. Tideland Prius

    Tideland Prius Moderator of the North
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    The bladder in the fuel tank minimise gas vapours so they don't form in the first place. The "whoosh" is the vapour that has built and is under pressure and when the gas cap is opened, it's released.
     
    #2 Tideland Prius, Sep 18, 2007
  3. richard schumacher

    richard schumacher shortbus driver

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    They also get adsorbed onto the graphite particles inside the vapor recovery canister. If the canister gets soaked with liquid fuel it stops working, which is why one should not top-off when fuelling.
     
    #3 richard schumacher, Sep 18, 2007
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