Diagnostic apparatus and method for fuel vapor treating apparatu

Details Diagnostic apparatus and method for fuel vapor treating apparatu Diagnostic apparatus and method for fuel vapor treating apparatu

1999-02-25

2000-10-17

McCall, Eric S.

Measuring and testing

Simulating operating condition

Marine

G01M 1500

Patent

active

06131448&

ABSTRACT:
A diagnostic apparatus for a fuel vapor treating apparatus closes a breather to shut a purge system valve during purge. While further continuing the purge, the apparatus detects the purge flow thereby caused and a pressure change occurring in the purge system. Based on the purge flow and the pressure change, the space volume in the purge system is estimated. By comparing the estimated space volume and the actual space volume in the purge system, the apparatus determines whether there is a failure or fault in the purge system.

REFERENCES:
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patent: 5295472 (1994-03-01), Otsuka et al.
patent: 5297529 (1994-03-01), Cook et al.
patent: 5411004 (1995-05-01), Busato et al.
patent: 5425344 (1995-06-01), Otsuka et al.
patent: 5898108 (1999-04-01), Mieczkowski et al.
patent: 6016690 (2000-01-01), Cook et al.

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