Fuel vapor treatment apparatus, system having the same,...

Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system

Reexamination Certificate

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C123S520000, C073S040700

Reexamination Certificate

active

07383826

ABSTRACT:
A fuel vapor treatment apparatus connects with a fuel tank, which produces fuel vapor to be purged into an intake passage of an internal combustion engine through a purge passage. The fuel vapor treatment apparatus includes a state measuring unit that includes a measurement passage provided separately from the purge passage. When the measurement passage is blocked from the intake passage, the state measuring unit measures a state of fuel vapor by detecting a physical quantity of the fuel vapor in the measurement passage. The physical quantity is correlative to the state of fuel vapor. The fuel vapor treatment apparatus further includes a diagnosis unit for diagnosing a malfunction of at least one of components of the state measuring unit.

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patent: 5666924 (1997-09-01), Kadota
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patent: 6371089 (2002-04-01), Matsuoka et al.
patent: 6932068 (2005-08-01), Osanai
patent: 7017558 (2006-03-01), Osanai
patent: 5-18326 (1993-01-01), None
patent: 6-101534 (1994-04-01), None

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