Device for treating evaporated fuel for internal combustion engine, has evaporated fuel absorption can, can outflow gas generator, vapor concentrator, treatment, circulation and can inlet gas lines

摘要

The device has a can (20) in which evaporated fuel produced in a fuel tank (10) can be absorbed, a can outflow gas generator (32) that causes gas to flow out of the can, a vapor concentrator (34,44) that separates the outflow gas into a treatment gas, a circulation gas and a can inlet gas with high, medium and low evaporated fuel concentrations respectively, a treatment gas line (42) passing the treatment gas to the fuel tank, a circulation gas line (60) that circulates the circulation gas upstream of the concentrator and a can inlet gas line (54) that circulates can inlet gas upstream of the can. AN Independent claim is also included for the following: (a) a method of treating evaporated fuel for an internal combustion engine.