Tank-venting system in a motor vehicle and method for...

Details Tank-venting system in a motor vehicle and method for... Tank-venting system in a motor vehicle and method for...

2005-05-10

2005-05-10

Lo, Weilun (Department: 3747)

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

C123S1980DA, C073S117020, C073S118040

Reexamination Certificate

active

06889667

ABSTRACT:
A method checks the operability of a tank-venting system for a motor vehicle having an internal combustion engine. The tank-venting system includes a fuel tank (10), an adsorption filter (20) and a filter line (12) connecting the adsorption filter to the fuel tank. The adsorption filter (20) has a venting line (22) and a switchover/check valve (70) is provided for closing off the venting line (22). The system includes a tank-venting valve (90) and a valve line (24) connecting the tank-venting valve to the adsorption filter. In the method, an overpressure relative to atmospheric pressure is introduced into the tank-venting system utilizing a drivable pressure source (50). An operating characteristic variable of the pressure source is detected while introducing the overpressure to determine the pressure course. A conclusion is drawn as to the presence of a leak from the pressure course. The overpressure is reduced by opening the tank-venting valve (90) and simultaneously closing said switchover/check valve (70).

REFERENCES:
patent: 5890474 (1999-04-01), Schnaibel et al.
patent: 6112728 (2000-09-01), Schwegler et al.
patent: 6131550 (2000-10-01), Fritz et al.
patent: 6182642 (2001-02-01), Ohkuma
patent: 6234152 (2001-05-01), Fritz et al.
patent: 6250288 (2001-06-01), Fritz
patent: 6644100 (2003-11-01), Fritz et al.
patent: WO 0173283 (2001-10-01), None

Affiliated with

Also associated with

Rating

Tank-venting system in a motor vehicle and method for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tank-venting system in a motor vehicle and method for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tank-venting system in a motor vehicle and method for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3368595