Rotary kinetic fluid motors or pumps – With means for re-entry of working fluid to blade set – Turbine regenerative pump
Patent
1992-12-28
1994-08-16
Miller, Carl S.
Rotary kinetic fluid motors or pumps
With means for re-entry of working fluid to blade set
Turbine regenerative pump
41742314, 417DIG1, 4174233, F01D 112, F04B 1700
Patent
active
053381513
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a unit for delivering fuel from a fuel tank to the internal combustion engine of a motor vehicle.
More particularly, it relates to a unit of the above mentioned general type which has a feed pump arranged in a fuel tank and constructed as a flow pump with a substantially circular-cylindrical impeller rotating in a circular-cylindrical pump chamber.
Units of the above mentioned general type are known in the art. A feed unit is already known (DE-OS 35 09 374) in which this bore hole is arranged directly in the delivery duct and provided with a resilient valve flap which remains in its open position while gas is being conveyed, but when fuel is delivered is deformed against spring force by the more "viscous" medium and closes the opening of the bore hole on the duct side. However, such a construction requires a particularly costly assembly of the valve flap. There is also the risk that the open valve flap will scrape against the impeller of the feed pump when gas is conveyed causing unwanted noise and will finally be destroyed.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a unit for delivering fuel from a fuel tank to an internal combustion engine, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a unit in which an end wall of the pump chamber is penetrated in the region of a pressure opening by a bore hole which connects the pump chamber with a region of the system with a low pressure, and the bore hole in accordance with the present invention is located in a sealing surface which defines a delivery duct in a radial direction with reference to an axis of rotation of the impeller.
When the unit is designed in accordance with the present invention, it has the advantage over the prior art that there are no movable structural members which are subject to wear during operation. It is also unnecessary to assemble such parts.
In a particularly advantageous construction of the feed unit, the blade edge has a first and second ring of blades, the second blade ring having a greater radius than the first blade ring, and two delivery ducts associated with the respective blade ring are located in the end wall of the chamber. The inner delivery duct is connected with the outer delivery duct via an intermediate duct. The suction opening is arranged at the inner delivery duct, while the pressure opening is arranged at the outer delivery duct. The bore hole is located in a region of the sealing surface which extends at least substantially between the two delivery ducts.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a schematic view of an arrangement with a fuel supply tank, a fuel feed unit, and an internal combustion engine of a motor vehicle;
FIG. 2 is an enlarged view of a partial longitudinal section through the feed unit according to FIG. 1 along line II--II in FIG. 3, and
FIG. 3 shows a section through a pump chamber cover on the suction opening side belonging to the feed unit according to FIG. 2 along line III--III.
DESCRIPTION OF A PREFERRED EMBODIMENT
FIG. 1 shows a fuel tank 10 in which a fuel feed unit 12 is arranged. A pressure line 16 leading to an internal combustion engine 18 is connected to a pressure sleeve 14 of the fuel feed unit 12. During operation of the internal combustion engine 18, the fuel feed unit 12 sucks fuel out of the fuel tank 10 via a suction sleeve 13 and delivers the fuel to the internal combustion engine 18. The fuel feed unit
REFERENCES:
patent: 2369440 (1945-02-01), Curtis
patent: 3128710 (1964-04-01), Blomgren
patent: 4462761 (1984-07-01), Ringwald
patent: 4508492 (1985-04-01), Kusakawa
patent: 4591311 (1986-05-01), Matsuda et al.
patent: 4692092 (1987-09-01), Matsuda
patent: 4784587 (1988-11-01), Takei
patent: 4793766 (1988-12-01), Kumata
patent: 4854830 (1989-08-01), Kozawa
patent: 5024578 (1991-06-01), Vansadia
patent: 5192184 (1993-03-01), Nobuo
Frank Kurt
Kemmner Ulrich
Niederkofler Michael
Miller Carl S.
Robert & Bosch GmbH
Striker Michael J.
LandOfFree
Unit for delivering fuel from the fuel tank to the internal comb does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Unit for delivering fuel from the fuel tank to the internal comb, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unit for delivering fuel from the fuel tank to the internal comb will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-947233