Evaporative purge monitoring method and system

Details Evaporative purge monitoring method and system Evaporative purge monitoring method and system

1994-09-15

1996-02-27

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

F02M 3302

Patent

active

054940214

ABSTRACT:
According to an evaporative purge system monitor strategy, a vacuum application phase is initiated by closing a canister vent valve and opening a canister purge valve if entry conditions are met in order to apply a vacuum to an evaporative purge flow path, and identification is made of a clog in the evaporative purge flow path if a target vacuum is not reached within a vacuum build time during the vacuum application phase and a preset vacuum is not reached after elapse of the vacuum build time.

REFERENCES:
patent: 5261379 (1993-11-01), Lipinski et al.
patent: 5279529 (1994-03-01), Cook et al.
patent: 5295472 (1994-03-01), Otsuka et al.
patent: 5355863 (1994-10-01), Yamanaka et al.
patent: 5355864 (1994-10-01), Kuroda et al.
patent: 5359978 (1994-11-01), Kidokoro et al.
patent: 5373823 (1994-12-01), Kuroda et al.
patent: 5398661 (1995-03-01), Denz et al.

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