Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1993-01-21
1995-06-20
Cross, E. Rollins
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123198D, F02M 2508
Patent
active
054253446
ABSTRACT:
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.
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Otsuka Takayuki
Sugiyama Tatsumasa
Teraoka Katsuhiko
Cross E. Rollins
Moulis Thomas N.
Toyota Jidosha & Kabushiki Kaisha
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