PURPOSE: To provide a vaporized fuel processing device such as preventing vaporized fuel from overflowing by improving adsorbing efficiency and separating efficiency of the vaporized fuel and further forming a frame as small as possible.
CONSTITUTION: A plurality of divided layers 101 to 107 are formed in a casing 9, and a flow path sectional area of these divided layers is set to 40cm2 or less. In upper/lower surfaces of the casing 9, a vapor inlet 12, purge ports 131 to 134, atmospheric conduction port 15, new air conduction ports 141 to 143 and two-way valves 18, 20 are provided. When vapor is adsorbed and returned back to a fuel tank 182, the two-way valves 18, 20 are closed, and when vapor is separated to an intake pipe 181, the two-way valves 18, 20 are opened. In this way, a flow path length is lengthened at adsorbing time and shortened at separating time, to improve adsorbing efficiency and separating efficiency. Since the flow path sectional area is 40cm2 or less, a returning amount to the fuel tank 182 of vapor is increased, to prevent the vapor from easily overflowing from the casing 9.
ITO TOSHIHIKO
SAKAKIBARA YASUYUKI
KANBARA SHINICHIRO
MAEDA KAZUTO
KOYAMA NOBUHIKO
ISHIGURO YUJI
NIPPON DENSO CO