EP0759503B1 - Fördereinheit - Google Patents
Fördereinheit Download PDFInfo
- Publication number
- EP0759503B1 EP0759503B1 EP96112506A EP96112506A EP0759503B1 EP 0759503 B1 EP0759503 B1 EP 0759503B1 EP 96112506 A EP96112506 A EP 96112506A EP 96112506 A EP96112506 A EP 96112506A EP 0759503 B1 EP0759503 B1 EP 0759503B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- main chamber
- pump
- fuel
- magnets
- delivery unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/18—Feeding by means of driven pumps characterised by provision of main and auxiliary pumps
Definitions
- the invention relates to a conveyor unit for conveying Fuel for an internal combustion engine of a motor vehicle with a main pump delivering from a main chamber, one for feeding the fuel into the main chamber trained backing pump and at least one in the Main chamber arranged electric motor, for driving Backing pump and main pump, the backing pump in a prechamber is arranged below the main chamber.
- Such conveyor units are nowadays widely used Delivery of fuel used in a motor vehicle and are therefore state of the art.
- the separation the delivery unit into a main chamber with one arranged therein Main pump and a prechamber with one in it arranged backing pump contributes to an increase in safety the fuel supply.
- Today's internal combustion engines require a particularly high level of security in the Supply of fuel, otherwise damage, for example on a catalyst, are to be feared.
- the backing pump delivers a supply of fuel into the main chamber. For example, when cornering the motor vehicle's fuel supply to the backing pump interrupted at short notice, this is irrelevant as long as there is still fuel in the main chamber. Due to the arrangement of the main chamber and the prechamber one above the other, the conveyor unit is particularly designed compact.
- the main pump and backing pump can also be used in this way from a single electric motor located in the main chamber drive. Then for driving the backing pump a drive shaft of the electric motor through a housing base the main chamber into the antechamber (DE 27 45 818 A1). Carrying the shaft through the bottom of the case Main chamber requires a particularly good radial seal, otherwise there is a risk that the main chamber after idling for a longer period of the motor vehicle. Thereby requires the supply of the internal combustion engine Fuel undesirable on a subsequent start Time. In addition, there is always the risk that the radial seal leaking through aging or fuel diffused through them.
- the invention is based on the problem of a conveyor unit of the type mentioned in such a way that they a secure supply of the internal combustion engine Motor vehicle guaranteed with fuel.
- the backing pump and a drive shaft of the electric motor each Have magnets that face each other arranged and by a non-magnetizable material existing housing base of the main chamber from each other are separated.
- connection of the backing pump to the main chamber can, for example with one in the case bottom between the Pre-chamber and the main chamber arranged valve.
- this valve has the disadvantage that it leaks could become, which then leads to an idling of the Main chamber could lead.
- This source of error can be avoid when the conveyor unit connects the prechamber with the main chamber has a riser, the Mouth of the housing bottom of the main chamber a distance Has.
- the riser thus serves as the overflow of the Antechamber that opens into the main chamber. So that's the The bottom of the main chamber is hermetically sealed.
- the backing pump has a pump wheel on it arranged magnets.
- the walls are the Form the prechamber so that it replaces the pump housing.
- the installation of the backing pump is particularly special simply because the impeller is the only one moving Part is inserted into the antechamber.
- the structure of the conveyor unit is the same Conveying capacity more compact if according to an advantageous Development of the invention of the housing bottom of the Main chamber a pot-shaped recess for receiving a End of the drive shaft when the magnets on the Circumference of the drive shaft are arranged and if the Back pump a bell-shaped enclosing the recess Extension has magnets arranged on its inner circumference are. With the arrangement of the magnets in a bell shape much larger forces can be transmitted, than, for example, with two on two end faces Magnets facing waves.
- the electric motor consists of electromagnets, while the backing pump only has permanent magnets. The main pump then needs its own drive.
- Complicated forms of the conveyor unit are easy produce if the walls of the antechamber and Main chamber made of the most fuel-resistant plastic injection molding.
- a conveyor unit has a main chamber 1 a prechamber located below it 2.
- the main chamber 1 there is a cylindrical pump device 3 with a main pump 4 arranged therein and an electric motor 5.
- the main pump 4 is on a drive shaft 6 of the electric motor 5 connected.
- On the drive shaft 6 is attached a magnet set 7, which is in a cup-shaped Indentation 8 penetrates into the housing base 9 of the main chamber 1.
- This cup-shaped depression 8 is in the antechamber 2 of a bell-shaped extension 10 one Pre-pump 11 enclosed.
- On the inner circumference of the bell-shaped Extension 10 is another magnet set 12 arranged.
- the backing pump 11 has a fixed with the magnet set 12 connected pump wheel 13.
- the antechamber 2 has a riser 17 a connection to the main chamber 1.
- Die Riser 17 is a simple pipe with a mouth 18 in the upper area of the main chamber 1.
- the riser 17 protrudes a little into the antechamber 2.
- the main pump 4 has one to to the housing bottom 9 of the main chamber 1 reaching suction line 20 and an outlet 21 leading out of the delivery unit.
- This design of the main chamber 1 ensures that it is hermetically sealed in the bottom area and no fuel accidentally got out of it.
- the Fuel delivery by the main pump 4 is as long maintain how fuel is in the main chamber 1 is located. A brief interruption in the fuel supply is at the inlet 16 of the conveyor irrelevant.
- FIG 2 is a section through the magnet set 12 of the Backing pump 11 and arranged on the drive shaft 6 Magnet set 7 shown in Figure 1.
- a magnet 23 on the drive shaft 6 is a magnet 22 on the backing pump 11 with opposite polarity. Between Magnet sets 7, 12 are part of the housing base 9 of the main chamber 1. It is important that one is possible high accuracy of fit of the magnet sets 7, 12 and Housing bottom 9, since the transmission of the drive energy from the drive shaft 6 to the backing pump 11 all the better is, the smaller the distance of the magnet sets 7, 12 from each other is.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Details Of Reciprocating Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
- Fig. 1
- eine Fördereinheit mit einer Hauptpumpe und einer Vorpumpe,
- Fig.2
- einen Schnitt entlang der Linie I-I durch eine magnetische Kraftübertragung der Vorpumpe aus Figur 1.
Claims (6)
- Fördereinheit zum Fördern von Kraftstoff für eine Brennkraftmaschine eines Kraftfahrzeuges mit einer aus einer Hauptkammer (1) fördernden Hauptpumpe (4), einer zum Fördern des Kraftstoffs in die Hauptkammer (1) ausgebildeten Vorpumpe (11) und zumindest einem in der Hauptkammer (1) angeordneten Elektromotor (5), zum Antrieb von Vorpumpe (11) und Hauptpumpe (4), wobei die Vorpumpe (11) in einer Vorkammer (2) unterhalb der Hauptkammer (1) angeordnet ist, dadurch gekennzeichnet, daß die Vorpumpe (11) und eine Antriebswelle (6) des Elektromotors (5) durch einen aus nicht magnetisierbarem Material bestehenden Gehäuseboden (9) der Hauptkammer (1) voneinander getrennt sind und daß die Vorpumpe (11) und die Antriebswelle (6) jeweils Magnete (22, 23) aufweisen, welche einander gegenüberstehend angeordnet sind.
- Fördereinheit nach Anspruch 1, dadurch gekennzeichnet, daß sie zur Verbindung der Vorkammer (2) mit der Hauptkammer (1) eine Steigleitung (17) hat, deren Mündung (18) von dem Gehäuseboden (9) der Hauptkammer (1) einen Abstand hat.
- Fördereinheit nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Vorpumpe (11) ein Pumpenrad (13) mit darauf angeordneten Magneten (22) hat.
- Fördereinheit nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Gehäuseboden (9) der Hauptkammer (1) eine topfförmige Vertiefung (8) zur Aufnahme eines Endes der Antriebswelle (6) hat, daß die Magnete (23) auf dem Umfang der Antriebswelle (6) angeordnet sind und daß die Vorpumpe (11) eine die Vertiefung (8) umschließende glockenförmige Erweiterung (10) hat, auf deren inneren Umfang Magnete (22) angeordnet sind.
- Fördereinheit nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß in der Hauptkammer (1) ein Stator des Elektromotors angeordnet und ein Teil der Vorpumpe (11) zu einem Rotor des Elektromotors ausgebildet ist.
- Fördereinheit nach zumindest einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Wandungen (9, 14) der Vorkammer (2) und der Hauptkammer (1) aus kraftstoffesten Kunststoffspritzguß bestehen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19530421A DE19530421A1 (de) | 1995-08-18 | 1995-08-18 | Fördereinheit |
DE19530421 | 1995-08-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0759503A2 EP0759503A2 (de) | 1997-02-26 |
EP0759503A3 EP0759503A3 (de) | 1997-10-15 |
EP0759503B1 true EP0759503B1 (de) | 1999-03-31 |
Family
ID=7769805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96112506A Expired - Lifetime EP0759503B1 (de) | 1995-08-18 | 1996-08-02 | Fördereinheit |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0759503B1 (de) |
DE (2) | DE19530421A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10062452A1 (de) * | 2000-12-14 | 2002-06-20 | Siemens Ag | Kraftstoffpumpe für ein Kraftfahrzeug |
DE10249953A1 (de) | 2002-10-26 | 2004-05-19 | Daimlerchrysler Ag | Pumpeneinheit |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2319934A (en) * | 1939-08-23 | 1943-05-25 | Carter Carburetor Corp | Electric fuel pump |
GB597874A (en) * | 1943-03-08 | 1948-02-05 | Thompson Prod Inc | Improvements in or relating to pump and tank assemblies |
US2885126A (en) * | 1955-10-05 | 1959-05-05 | Tokheim Corp | Magnetically driven tank pump apparatus |
DE2740002C2 (de) * | 1977-09-06 | 1985-10-03 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstofförderaggregat |
DE2745818A1 (de) * | 1977-10-12 | 1979-04-26 | Bosch Gmbh Robert | Kraftstoffoerderpumpe |
JPS5859357A (ja) * | 1981-10-05 | 1983-04-08 | Mitsubishi Electric Corp | 自動車用回転式容積形燃料ポンプ |
DE3532349A1 (de) * | 1984-09-20 | 1986-03-27 | Volkswagen Ag | Kraftstoff-foerdereinrichtung fuer eine fahrzeug-brennkraftmaschine |
DE3713276C2 (de) * | 1987-04-18 | 1996-03-21 | Pierburg Gmbh | Brennstoffördereinrichtung für eine Brennkraftmaschine |
DE3941147A1 (de) * | 1989-12-13 | 1991-06-20 | Bosch Gmbh Robert | Vorrichtung zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine eines kraftfahrzeuges |
DE4242242C2 (de) * | 1992-12-15 | 2003-04-30 | Bosch Gmbh Robert | Vorrichtung zum Versorgen der Brennkraftmaschine eines Kraftfahrzeuges mit in einem Vorratstank vorhandenem Kraftstoff |
-
1995
- 1995-08-18 DE DE19530421A patent/DE19530421A1/de not_active Withdrawn
-
1996
- 1996-08-02 EP EP96112506A patent/EP0759503B1/de not_active Expired - Lifetime
- 1996-08-02 DE DE59601543T patent/DE59601543D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19530421A1 (de) | 1997-02-20 |
DE59601543D1 (de) | 1999-05-06 |
EP0759503A3 (de) | 1997-10-15 |
EP0759503A2 (de) | 1997-02-26 |
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