JPH048756U - - Google Patents

Description

[Brief explanation of the drawing]

Figures 1 to 6 show a first embodiment embodying this invention. Figure 1 is a schematic diagram of an evaporated fuel processing device applied to an internal combustion engine, and Figures 2 to 4 show a throttle valve opening. Figure 5 is a characteristic diagram explaining the relationship between the purge amount and the intake air amount, and Figure 6 is the purge rate vs. the intake air amount. It is a characteristic diagram explaining the relationship between. FIG. 7 is a schematic diagram of the evaporative fuel treatment device in a second embodiment embodying this invention, and FIG. 8 is a schematic diagram of a third embodiment embodying this invention.
FIG. 1 is a schematic configuration diagram of an evaporative fuel processing device in an example. In the figure, 1 is an intake passage, 3 is a throttle valve, 4 is a fuel tank, 5, 21, 26 are canisters, 6,
22 is activated carbon, 27 is an activated carbon layer, 14 is a purge control valve, 13a, 23a, 28a are purge ports,
15a, 24a, and 29a are atmospheric ports.

Claims (1)

[Scope of Claim for Utility Model Registration] A canister that adsorbs evaporated fuel generated in a fuel tank; a purge port that introduces fuel separated from the canister to the upstream side of a throttle valve in an intake passage; In an evaporated fuel processing device equipped with an atmospheric port that takes in atmospheric air for removal, a purge control valve that can be opened and closed on an upstream side of the purge port is provided in the intake passage, and the purge control valve is provided in the intake passage to control the purge. An evaporative fuel processing device characterized in that the atmospheric port is opened and provided upstream of a control valve.