Method for checking the tightness of a tank system of a vehicle

Details Method for checking the tightness of a tank system of a vehicle Method for checking the tightness of a tank system of a vehicle

1997-02-26

1998-08-18

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123520, F02M 3302

Patent

active

057945993

ABSTRACT:
The invention is directed to a method for checking the tightness of a tank system of an internal combustion engine having an intake pipe. The tank system includes: a fuel tank wherein fuel vapor forms, a regeneration valve connected to the intake pipe; an adsorption filter connected between the regeneration valve and the fuel tank; the regeneration valve being movable between a closed position and an open position wherein the fuel vapor is drawn by suction into the intake pipe; the adsorption filter having a venting line; and, a shutoff valve for the venting line and being movable between a first position wherein the venting line is closed off pressure tight and a second position wherein the venting line is open to the adsorption filter; and, a pump for generating a diagnostic overpressure in the tank system. The method includes the steps of: generating a diagnostic overpressure in the tank system with the regeneration valve in the closed position and the shutoff valve in the first position; first moving the regeneration valve to the open position; measuring the pressure in the tank system; and, then switching the shutoff valve into the second position when the pressure in the tank system corresponds essentially to atmospheric pressure.

REFERENCES:
patent: 5383437 (1995-01-01), Cook et al.
"Tankdiagnose: Eine neue Methode zur sicheren Leckage-Erkennung", H. Stocker et al, 4. Aachener Kolloquium, Fahrzeug-und Motorentechnick, 1993.

Affiliated with

Also associated with

Rating

Method for checking the tightness of a tank system of a vehicle 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 for checking the tightness of a tank system of a vehicle , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for checking the tightness of a tank system of a vehicle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1106235