PURPOSE: To improve adsorption and desorption efficiency of evaporated fuel by connecting an atmospheric port to an atmosphere side chamber with a connecting pipe penetrating an adsorbent bed for sticking a heat reserving member on outer periphery surface of this connecting pipe around.
CONSTITUTION: A suction port 11 for evaporated fuel, a purge port 12 and an atmospheric port 13 are provided on one end side of an adsorbent bed 15 and on the other end side, is provided an atmosphere side chamber 23. The atmospheric port 13 and the atmosphere side chamber 23 are connected together with a connecting pipe 25 penetrating the adsorbent bed 15. On outer periphery surface of the connecting pipe 25, a heat reserving member 26 provided in buried in the adsorbent bed 15 is stuck. The connecting pipe 25 and the heat reserving member 26 are formed of material having higher heat capacity than adsorbent 15. Through constituting in such way, adsorption and desorption efficiency can be improved.
HARUTA KAZUMI
KOEDA KENJI
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