The control means opens the first valve and the second valve to generate an air flow, which flows from {HEAD ~ the first connection point} of {TAIL ~ the intake air passage} to the second connection point of the intake air passage through the first connection passage, the interior of the housing of the canister and the second connection passage to desorb the fuel vapor from the adsorbent and to purge the desorbed fuel vapor into the intake air passage in an operational period of the supercharging device, during which the supercharging device supercharges the intake air 
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The control means opens the first valve and the second valve to generate an air flow , which flows from { HEAD ~ the first connection point } of { TAIL ~ the intake air passage } to the second connection point of the intake air passage through the first connection passage , the interior of the housing of the canister and the second connection passage to desorb the fuel vapor from the adsorbent and to purge the desorbed fuel vapor into the intake air passage in an operational period of the supercharging device , during which the supercharging device supercharges the intake air
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