Kenyon & Kenyon
Diagnostic apparatus for evaporative fuel purge system
 In a diagnostic apparatus for an evaporative fuel purge system having a canister receiving fuel from a fuel tank via a vapor passage, the fuel being supplied to an intake air passage of an internal combustion engine via a purge passage from the canister, a pressure detecting unit detects a pressure in the evaporative fuel purge system. A decision making unit determines whether or not a failure has occurred in the evaporative fuel purge system on the basis of a relationship between the pressure detected by the pressure detecting unit and a decision value. A correction unit corrects the relationship on the basis of a value of a parameter having an influence on the pressure detected by the pressure detecting unit. 
Toyota Jidosha Kabushiki Kaisha
F F F
F02D F02D F02M
additional additional inventional
Katsuhiko Tatsumasa Takayuki
Teraoka Sugiyama Otsuka