Pump appliance, in particular for a tank system of an internal c

Details Pump appliance, in particular for a tank system of an internal c Pump appliance, in particular for a tank system of an internal c

1995-05-17

2000-05-09

Freay, Charles G.

Pumps

Motor driven

Fluid motor

F04B 4306

Patent

active

060595434

ABSTRACT:
Known tank systems have an adsorption filter in order to accept degassing constituents of the fuel in a fuel tank. Such tank systems have to be tested for leaks and a pump appliance is provided for this purpose. The pump appliance is fitted to a ventilation conduit of the adsorption filter in order to supply a defined volume to the tank system so that an increase in pressure in the tank system is effected. In order to determine whether the tank system is pressure-tight, ample time is left after the pressure build-up in order that, if pressure decays, the conclusion can be drawn that there is a leak. The pump appliance according to the invention possesses an electromagnetic valve which has a vacuum connection connected to an induction pipe of an internal combustion engine in order to adjust, alternately, vacuum and ambient pressure in a pump space so that the pressure forces move a pump diaphragm in order to pump air into a ventilation conduit of an adsorption filter. During the pump procedure, it is necessary to ventilate the electromagnetic valve and this takes place, in accordance with the invention, by means of a ventilation opening leading directly to the surroundings. The pump appliance according to the invention is provided, in particular, for a tank system of an internal combustion engine.

REFERENCES:
patent: 3294030 (1966-12-01), Fox
patent: 4551076 (1985-11-01), DuBois
4. Aachener Kolloquium, Fahrzeng-und Motorentechnik, 1993, Seiten 467 bis 477, Verfasser: Dr.-Ing. H. Stocker, Dr.-Ing. M. Constien.

Affiliated with

Also associated with

Rating

Pump appliance, in particular for a tank system of an internal c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pump appliance, in particular for a tank system of an internal c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump appliance, in particular for a tank system of an internal c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1058239