Fuel vapor processing devices

摘要

One aspect according to the present teachings includes a fuel vapor processing device including a housing having a first port for introduction of fuel vapor, a second port for introduction of negative pressure, and a third port communicating with an atmosphere. An adsorption material is disposed within the housing. In a desorption mode, fuel vapor desorbed by the adsorption material is desorbed from the adsorption material as air flows into the housing via the third port and flows out of the second port. A plurality of heaters are disposed within the housing and are arranged along a path of flow of air from the third port to the second port in the adsorption mode. A controller controls the heaters such that the heaters start to heat the adsorption material in order of the air flow direction from the third port to the second port. The controller preferably also terminates heating of the adsorption material in the same manner.

主权项

1. A fuel vapor processing device comprising:
a housing including a tank port communicating with a fuel tank, a purge port communicating with an intake air pipe of an internal combustion engine, and an atmospheric port communicating with an atmosphere; the housing filled with an adsorption material capable of adsorbing fuel vapor and allowing desorption of fuel vapor; and a plurality of heaters capable of heating the adsorption material; wherein the heaters are configured to be able to receive a supply of electric power separately from each other and arranged within the housing along a flow path of a fluid from the atmospheric port to the purge port; wherein during a purge operation, electric power is sequentially terminated from the heaters from the atmospheric port side to the purge port side; and wherein the electric power is supplied to the heaters in a sequential manner from the atmospheric port side to the purge port side.