US 2001/0017129 A1 · Evaporated fuel treatment device

Abstract

An evaporated fuel treatment device in which performance of a canister can be improved, with the result that efficiency in treatment of evaporated fuel can be enhanced and the like. In the evaporated fuel treatment device, a purge control valve, conventionally disposed on a purge passage, is removed, such that the canister is directly subject to a negative pressure generated on the side of an inlet pipe at the time of starting of an engine. Consequently, a great attraction force acts on the evaporated fuel adsorbed within the canister. Also, by restricting a flow of air introduced into the canister by means of a flow control valve, the negative pressure applied to the canister can further be increased. As a result, in the evaporated fuel treatment device of the invention, the amount of the evaporated fuel which can be desorbed from the canister is larger than that of a conventional device.

Claims4

Dependent claims

An evaporated fuel treatment device comprising:

a canister within which evaporated fuel generated in a fuel tank is adsorbed, the canister being connected to the fuel tank via an evaporation passage;
a purge passage for connecting the canister and an inlet pipe of an internal combustion engine;
an inlet air passage for introducing air to deliver to the purge passage the evaporated fuel desorbed from the canister, the inlet air passage being connected to the canister;
and
flow control means for controlling a flow of the air flowing through the inlet air passage, the flow control means being disposed on the inlet air passage.

2 more elements

Dependencies are inferred from the claim text.

Evaporated fuel treatment device

Life of this patent

Evaporated fuel treatment device

Life of this patent

Abstract

Claims4