Measuring and testing – Simulating operating condition – Marine
Patent
1995-08-16
1997-03-25
Chilcot, Richard
Measuring and testing
Simulating operating condition
Marine
123521, F02M 3302
Patent
active
056146655
ABSTRACT:
A method and system for monitoring an evaporative purge system for malfunctions and leaks. First, a plurality of predetermined entry conditions are checked for satisfaction. If the plurality of predetermined entry conditions have been met, a flow of vapor in the evaporative purge system is determined. The evaporative purge system is then sealed from atmosphere so as to pull a vacuum on the fuel tank. The vacuum is compared to a predetermined vacuum range. If the vacuum is within the predetermined vacuum range, the vacuum is allowed to stabilize to obtain a stabilized vacuum level. A decrease in the stabilized vacuum level is determined after a predetermined amount of time to obtain a vacuum bleed-up. A vacuum bleed-up acceptance threshold is then determined based on the determined flow of vapor and the vacuum bleed-up is then compared to the vacuum bleed-up acceptance threshold. If the vacuum bleed-up exceeds the vacuum bleed-up acceptance threshold, atmosphere is provided to the evaporative purge system until stabilization. The evaporative purge system is then sealed again to create a pressure build. The pressure build is compared to a pressure threshold. Finally, a malfunction signal is generated if the pressure build is less than the pressure threshold.
REFERENCES:
patent: 5261379 (1993-11-01), Lipinski et al.
patent: 5263462 (1993-11-01), Reddy
patent: 5275144 (1994-01-01), Gross
patent: 5295472 (1994-03-01), Otsuka et al.
patent: 5299545 (1994-04-01), Kuroda et al.
patent: 5333589 (1994-08-01), Otsuka
patent: 5333590 (1994-08-01), Thomson
patent: 5353771 (1994-10-01), Blumenstock et al.
patent: 5355863 (1994-10-01), Yamanaka et al.
patent: 5363828 (1994-11-01), Yamashita et al.
patent: 5373822 (1994-12-01), Thompson
patent: 5474049 (1995-12-01), Nagaishi et al.
patent: 5495749 (1996-03-01), Dawson et al.
Curran Patrick J.
McCoy Juliette J.
Panganis Michael A.
Rychlick Edward G.
Schwager Bryce A.
Abolins Peter
Chilcot Richard
Ford Motor Company
May Roger L.
McCall Eric S.
LandOfFree
Method and system for monitoring an evaporative purge system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for monitoring an evaporative purge system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for monitoring an evaporative purge system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2204810