Patent ID: 6874485
Filing Date: 2005-04-05
Classification: F02D,F02M

Abstract:
1. A device for detecting deterioration of a canister used in a fuel evaporation control system in which fuel evaporated from a fuel tank is absorbed by the canister and the absorbed gaseous fuel is purged into an intake pipe of an internal combustion engine, the canister being disposed in a passage connecting the fuel tank and the intake pipe, the detecting device comprising: means for controlling an amount of purge gas flow purged into the intake pipe; means for detecting a density of purge gas purged into the intake pipe; means for detecting fuel-absorbing ability of the canister based on a deviation of the detected purge gas density; and means for memorizing a maximum level of the purge gas density detected during a purging process, wherein: the deviation of the purge gas density is a difference between the purge gas density detected by the purge gas density detecting means and the maximum level of the purge gas density memorized in the memorizing means.