EP1880108A1 - Internal gear fuel pump - Google Patents

Internal gear fuel pump

Info

Publication number
EP1880108A1
EP1880108A1 EP06754971A EP06754971A EP1880108A1 EP 1880108 A1 EP1880108 A1 EP 1880108A1 EP 06754971 A EP06754971 A EP 06754971A EP 06754971 A EP06754971 A EP 06754971A EP 1880108 A1 EP1880108 A1 EP 1880108A1
Authority
EP
European Patent Office
Prior art keywords
shaft
rotor
fuel pump
stage
electric motor
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.)
Withdrawn
Application number
EP06754971A
Other languages
German (de)
French (fr)
Inventor
Holger Barth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
Original Assignee
Siemens VDO Automotive AG
VDO Automotive AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens VDO Automotive AG, VDO Automotive AG filed Critical Siemens VDO Automotive AG
Publication of EP1880108A1 publication Critical patent/EP1880108A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/60—Shafts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making

Definitions

  • the invention relates to a fuel pump with a housing, an electric motor arranged in the housing, consisting of a stator and a rotor having a shaft, wherein the shaft extends into the region of a pumping stage and penetrates it.
  • G rotor pumps Such fuel pumps have long been prior art and therefore known. As pumping stages of these fuel pumps, positive displacement pumps, in particular G rotor pumps, have proven themselves.
  • the displacement pumps used as G-rotor pumps consist of an inner rotor and an outer rotor, wherein the inner rotor is driven by the electric motor. Due to the pressures generated by a G-rotor pump, high forces occur in a G-rotor pump.
  • the connection of the inner rotor with the electric motor therefore takes place via a coupling.
  • the clutch is arranged on the shaft of the electric motor and has a plurality of aligned in the direction of the inner rotor and parallel to the shaft driver, which engage in recesses of the inner rotor. About these drivers, the inner rotor is rotated.
  • This coupling can either be a separate component or part of the plastic encapsulation of the rotor. In the latter case, the coupling is formed integrally with the rotor.
  • the disadvantage here is the formation of the coupling as a plastic component. Due to the forces occurring during operation of the G-rotor pump, a coupling made of plastic must have a relatively large number of drivers in order to reliably prevent damage to the clutch as a result of the forces occurring during operation. But even with a trained as a separate component coupling made of metal with a smaller number of carriers has the disadvantage that an additional component is present, which provides Herge ⁇ and must be mounted.
  • the present invention is therefore an object of the invention to provide a fuel pump of the type mentioned, which is particularly cost-effective and dispenses in particular with additional ⁇ Liche or complicated designed components.
  • the object is achieved in that the pumping stage is designed as a G-rotor stage that the shaft of the electric motor at least in the region in which the Wel ⁇ le penetrates the inner rotor has at least two flats at its periphery and that the inner rotor of the G - Rotor stage has a similarly shaped recess.
  • the two flats on the shaft are particularly easy to produce, if they are opposite to the circumference of the shaft and thus aligned parallel to each other.
  • the loads occurring in the G-rotor pump are counteracted in a further embodiment when the shaft has three flats in the region with which it penetrates the inner rotor.
  • the formation of the corresponding shaft portion has been found to be advantageous as a polygon or spline.
  • Fig. 1 a section through a force ⁇ fuel pump according to the invention
  • Fig. 2 a second imple mentation form in a section AA of Fig. 1 and
  • FIG. 3 shows a third embodiment in a section A-A from FIG. 1.
  • the fuel pump shown in Fig. 1 consists of an electric motor 1 and designed as a G-pump rotor pump stage 2. On the side facing away from the electric motor 1 side of the pumping stage 2, a lid 3 is arranged with a fuel inlet 4. On the opposite side of the fuel pump, a connecting piece 5 closes off the fuel pump. The lid 3 and the connector 5 are connected to a common housing 5.
  • the electric motor 1 has a rotor 8 arranged in a stator 7 with a shaft 9. An area 10 of the shaft 9 passes through the G-rotor pump 2.
  • the G-rotor pump 2 consists of two housing plates 11, 12 which are spaced apart by a spacer ring 13 are arranged.
  • FIG. 1 shows, respectively, of FIG. 1 differing profiles of the shaft 9 in the region 10.
  • Fig. 2 has the Wel ⁇ le 9 is a polygonal profile.
  • the shaft 9 is formed in the region 10 as a splined shaft 19 which engages in a correspondingly shaped receptacle 18 of the inner ⁇ runner 15.

Abstract

The invention relates to a fuel pump comprising a housing (6), an electric motor (1) arranged in said housing (6) and provided with a stator (7) and a rotor (8) having a shaft (9). The shaft (9) extends to the area of a pump stage (2) and passes therethrough. The pump stage (2) is configured as a G-rotor stage. The shaft (9) of the electric motor (1) has, on its periphery, at least two flattened portions (16, 17) at least in the area (10) in which the shaft (9) passes through an inner rotor (15) of the G-rotor stage (2), whilst the inner rotor (15) of the rotor stage (2) has an identically configured recess (18).

Description

Beschreibungdescription
INNENZAHNRAD-KRAFTSTOFFPUMPEINSIDE GEAR FUEL PUMP
Gegenstand der Erfindung ist eine Kraftstoffpumpe mit einem Gehäuse, einem in dem Gehäuse angeordneten Elektromotor, bestehend aus einem Stator und einem eine Welle aufweisenden Rotor, wobei die Welle sich bis in den Bereich einer Pumpstufe erstreckt und diese durchdringt. Verwendung finden solche Kraftstoffpumpen in Fördereinheiten, die in Kraftstoffbehältern von Kraftfahrzeugen eingesetzt werden, um Kraftstoff aus dem Kraftstoffbehälter zu einer Brennkraftmaschine des Kraft¬ fahrzeugs zu fördern.The invention relates to a fuel pump with a housing, an electric motor arranged in the housing, consisting of a stator and a rotor having a shaft, wherein the shaft extends into the region of a pumping stage and penetrates it. Use find such fuel pumps in delivery units, which are used in fuel tanks of motor vehicles to promote fuel from the fuel tank to an internal combustion engine of the power ¬ vehicle.
Derartige Kraftstoffpumpen sind seit langem Stand der Technik und daher bekannt. Als Pumpstufen dieser Kraftstoffpumpen haben sich Verdrängerpumpen, insbesondere G-Rotorpumpen bewährt. Die als G-Rotorpumpen eingesetzten Verdrängerpumpen bestehen aus einem Innenläufer und einem Außenläufer, wobei der Innenläufer vom Elektromotor angetrieben wird. Aufgrund der mit einer G-Rotorpumpe erzeugten Drücke, treten in einer G-Rotorpumpe hohe Kräfte auf. Die Verbindung des Innenläufers mit dem Elektromotor erfolgt daher über eine Kupplung. Die Kupplung ist auf der Welle des Elektromotors angeordnet und besitzt mehrere, in Richtung des Innenläufers und parallel zur Welle ausgerichtete Mitnehmer, die in Ausnehmungen des Innenläufers eingreifen. Über diese Mitnehmer wird der Innenläufer in Rotation versetzt. Diese Kupplung kann entweder ein separates Bauteil oder Teil der Kunststoffumspritzung des Ro- tors sein. Im letzteren Fall ist die Kupplung einteilig mit dem Rotor ausgebildet. Nachteilig hierbei ist die Ausbildung der Kupplung als Kunststoffbauteil. Aufgrund der im Betrieb der G-Rotorpumpe auftretenden Kräfte muss eine aus Kunststoff bestehende Kupplung relativ viele Mitnehmer aufweisen, um ei- ne Beschädigung der Kupplung infolge der im Betrieb auftretenden Kräfte zuverlässig zu vermeiden. Aber auch bei einer als separates Bauteil ausgebildeten Kupplung aus Metall mit einer geringeren Anzahl von Mitnehmern besteht der Nachteil, dass ein zusätzliches Bauteil vorhanden ist, welches herge¬ stellt und montiert werden muss.Such fuel pumps have long been prior art and therefore known. As pumping stages of these fuel pumps, positive displacement pumps, in particular G rotor pumps, have proven themselves. The displacement pumps used as G-rotor pumps consist of an inner rotor and an outer rotor, wherein the inner rotor is driven by the electric motor. Due to the pressures generated by a G-rotor pump, high forces occur in a G-rotor pump. The connection of the inner rotor with the electric motor therefore takes place via a coupling. The clutch is arranged on the shaft of the electric motor and has a plurality of aligned in the direction of the inner rotor and parallel to the shaft driver, which engage in recesses of the inner rotor. About these drivers, the inner rotor is rotated. This coupling can either be a separate component or part of the plastic encapsulation of the rotor. In the latter case, the coupling is formed integrally with the rotor. The disadvantage here is the formation of the coupling as a plastic component. Due to the forces occurring during operation of the G-rotor pump, a coupling made of plastic must have a relatively large number of drivers in order to reliably prevent damage to the clutch as a result of the forces occurring during operation. But even with a trained as a separate component coupling made of metal with a smaller number of carriers has the disadvantage that an additional component is present, which provides Herge ¬ and must be mounted.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, eine Kraftstoffpumpe der eingangs genannten Art zu schaffen, die besonders kostengünstig ist und insbesondere auf zusätz¬ liche oder kompliziert ausgestaltete Bauteile verzichtet.The present invention is therefore an object of the invention to provide a fuel pump of the type mentioned, which is particularly cost-effective and dispenses in particular with additional ¬ Liche or complicated designed components.
Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass die Pumpstufe als G-Rotorstufe ausgebildet ist, dass die Welle des Elektromotors zumindest in dem Bereich, in denen die Wel¬ le den Innenläufer durchdringt, mindestens zwei Abflachungen an ihrem Umfang aufweist und dass der Innenläufer der G- Rotorstufe eine ebenso gestaltete Ausnehmung aufweist.According to the invention the object is achieved in that the pumping stage is designed as a G-rotor stage that the shaft of the electric motor at least in the region in which the Wel ¬ le penetrates the inner rotor has at least two flats at its periphery and that the inner rotor of the G - Rotor stage has a similarly shaped recess.
Überraschenderweise wurde gefunden, dass entgegen der vor¬ herrschenden Meinung keine zusätzliche Kupplung zum Verbinden des Elektromotors mit dem Innenläufer notwendig ist, und dass sich der Innenläufer direkt von der Welle antreiben lässt, wenn die Welle hierbei zumindest zwei Abflachungen aufweist. Insbesondere die sich aufgrund des Druckes an der Auslassöff¬ nung der G-Rotorstufe ausbildenden Kippmomente werden über die zumindest zwei Abflachungen aufgenommen, wodurch ein Verkanten des Innenläufers wirksam vermieden wird. Der wesentli- che Vorteil besteht darin, dass die Kupplung als zusätzliches Bauteil entfällt. Damit gestaltet sich die Kraftstoffpumpe einfacher, ist schneller zu montieren und somit insgesamt kostengünstiger.It has surprisingly been found that contrary to the prevailing opinion before ¬ no additional clutch for connecting the electric motor is necessary with the inner rotor and the internal rotor that is directly from the shaft can be driven when the shaft has in this case at least two flats. In particular, owing to the pressure at the Auslassöff ¬ voltage of the G-rotor stage forming tilting moments are taken up via the at least two flats, whereby a tilting of the inner rotor effectively avoided. The main advantage is that the coupling is eliminated as an additional component. This makes the fuel pump easier, faster to install and thus more cost effective.
Die zwei Abflachungen an der Welle lassen sich besonders einfach herstellen, wenn sie am Umfang der Welle gegenüberliegend und damit zueinander parallel ausgerichtet sind.The two flats on the shaft are particularly easy to produce, if they are opposite to the circumference of the shaft and thus aligned parallel to each other.
Den in der G-Rotorpumpe auftretenden Belastungen wird in ei- ner weiteren Ausgestaltung entgegengewirkt, wenn die Welle in dem Bereich, mit dem sie den Innenläufer durchdringt, drei Abflachungen aufweist. Bei größeren Kräften und Momenten hat sich die Ausbildung des entsprechenden Wellenabschnitts als Polygon oder Keilwelle als vorteilhaft herausgestellt.The loads occurring in the G-rotor pump are counteracted in a further embodiment when the shaft has three flats in the region with which it penetrates the inner rotor. For larger forces and moments, the formation of the corresponding shaft portion has been found to be advantageous as a polygon or spline.
An drei Ausführungsbeispielen wird die Erfindung näher erläutert. Es zeigen inIn three embodiments, the invention will be explained in more detail. It show in
Fig. 1: einen Schnitt durch eine erfindungsgemäße Kraft¬ stoffpumpe, Fig. 2: eine zweite Aus führungsform in einem Schnitt A-A aus Fig. 1 undFig. 1: a section through a force ¬ fuel pump according to the invention, Fig. 2: a second imple mentation form in a section AA of Fig. 1 and
Fig. 3: eine dritte Aus führungsform in einem Schnitt A-A aus Fig. 1.3 shows a third embodiment in a section A-A from FIG. 1.
Die in Fig. 1 dargestellte Kraftstoffpumpe besteht aus einem Elektromotor 1 und einer als G-Rotorpumpe ausgebildeten Pumpstufe 2. Auf der dem Elektromotor 1 abgewandten Seite der Pumpstufe 2 ist ein Deckel 3 mit einem Kraftstoffeinlass 4 angeordnet. Auf der gegenüberliegenden Seite der Kraftstoff- pumpe schließt ein Anschlussstück 5 die Kraftstoffpumpe ab. Der Deckel 3 und das Anschlussstück 5 sind mit einem gemeinsamen Gehäuse 5 verbunden. Der Elektromotor 1 besitzt einen in einem Stator 7 angeordneten Rotor 8 mit einer Welle 9. Ein Bereich 10 der Welle 9 durchdringt die G-Rotorpumpe 2. Die G- Rotorpumpe 2 besteht aus zwei Gehäuseplatten 11, 12, die über einen Distanzring 13 beabstandet zueinander angeordnet sind. Zwischen dem beiden Gehäuseplatten 11, 12 sind ein Außenläufer 14 und ein Innenläufer 15 drehbar gelagert. Die Welle 9 besitzt in dem Bereich 10 zwei gegenüberliegende und parallel zueinander angeordnete Abflachungen 16, 17, die in einer entsprechend in Ausnehmung 18 des Innenläufers 15 angeordnet sind, so dass der Innenläufer 15 bei einer Drehung des Rotors 8 und damit der Welle 9 in Rotation versetzt wird. Im Betrieb der Pumpstufe 2 wird der Kraftstoff über den Ansaugstutzen 4 und eine Öffnung 20 in der Gehäuseplatte 12 axial angesaugt, während er über die Öffnung 21 die Pumpstufe 2 axial gerich¬ tet verlässt. Die Figuren 2 und 3 zeigen jeweils von Fig. 1 abweichende Profile der Welle 9 im Bereich 10. In Fig. 2 besitzt die Wel¬ le 9 ein Polygonprofil. Hierzu sind an der Welle 9 drei Ab¬ flachungen 16 bis 18 vorhanden, wobei die Abflachungen 16 - 18 derart ausgebildet sind, dass die Welle 9 in diesem Be¬ reich einen in etwa dreieckigen Querschnitt besitzt. In Fig. 9 ist die Welle 9 im Bereich 10 als Keilwelle 19 ausgebildet, die in einer entsprechend gestaltete Aufnahme 18 des Innen¬ läufers 15 eingreift. The fuel pump shown in Fig. 1 consists of an electric motor 1 and designed as a G-pump rotor pump stage 2. On the side facing away from the electric motor 1 side of the pumping stage 2, a lid 3 is arranged with a fuel inlet 4. On the opposite side of the fuel pump, a connecting piece 5 closes off the fuel pump. The lid 3 and the connector 5 are connected to a common housing 5. The electric motor 1 has a rotor 8 arranged in a stator 7 with a shaft 9. An area 10 of the shaft 9 passes through the G-rotor pump 2. The G-rotor pump 2 consists of two housing plates 11, 12 which are spaced apart by a spacer ring 13 are arranged. Between the two housing plates 11, 12, an external rotor 14 and an internal rotor 15 are rotatably mounted. The shaft 9 has in the region 10 two opposite and mutually parallel flats 16, 17 which are arranged in a corresponding recess 18 in the inner rotor 15 so that the inner rotor 15 upon rotation of the rotor 8 and thus the shaft 9 in rotation is offset. In operation of the pumping stage 2 of the fuel via the intake port 4 and an opening 20 in the housing plate 12 is axially sucked while court exits via the opening 21, the pumping stage 2 axially ¬ tet. Figures 2 and 3 show, respectively, of FIG. 1 differing profiles of the shaft 9 in the region 10. In Fig. 2 has the Wel ¬ le 9 is a polygonal profile. For this purpose, on the shaft 9 from three ¬ flachungen 16 to 18 available, wherein the flattened portions 16 - 18 are formed such that the shaft 9 in this Be ¬ rich has a triangular cross-section approximately. In Fig. 9, the shaft 9 is formed in the region 10 as a splined shaft 19 which engages in a correspondingly shaped receptacle 18 of the inner ¬ runner 15.

Claims

Patentansprüche claims
1. Kraftstoffpumpe mit einem Gehäuse, einem in dem Ge¬ häuse angeordneten Elektromotor, bestehend aus einem Stator und einem eine Welle aufweisenden Rotor, wobei die Welle sich bis in den Bereich einer Pumpstufe erstreckt und diese durchdringt, dadurch gekenn¬ zeichnet, dass die Pumpstufe (2) als G-Rotorstufe ausgebildet ist, dass die Welle (9) des Elektromotors (1) zumindest in dem Bereich (10), in dem die Welle1. Fuel pump with a housing, a housing arranged in the Ge ¬ electric motor consisting of a stator and a rotor having a shaft, wherein the shaft extends into the region of a pumping stage and this penetrates, characterized marked ¬ characterized in that the pumping stage (2) is designed as a G-rotor stage that the shaft (9) of the electric motor (1) at least in the region (10) in which the shaft
(9) einen Innenläufer (15) der G-Rotorstufe (2) durchdringt, an ihrem Umfang zumindest zwei Abfla¬ chungen (16, 17) aufweist, und dass der Innenläufer (15) der G-Rotorstufe (2) eine ebenso gestaltete Aus- nehmung (18) aufweist.(9) penetrates an inner rotor (15) of the G-rotor stage (2), has at least two Abfla ¬ chungen (16, 17) on its circumference, and that the inner rotor (15) of the G-rotor stage (2) also designed a Aus - perception (18).
2. Kraftstoffpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Abflachungen (16, 17) im Bereich (10) am Umfang der Welle (9) gegenüberliegend und zueinander parallel ausgerichtet sind.2. Fuel pump according to claim 1, characterized in that the flats (16, 17) in the region (10) on the circumference of the shaft (9) are aligned opposite each other and parallel.
3. Kraftstoffpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Welle (9) in ihrem Be¬ reich (10) drei Abflachungen (16 - 18) besitzt.3. Fuel pump according to claim 1, characterized in that the shaft (9) in its Be ¬ rich (10) has three flats (16 - 18).
4. Kraftstoffpumpe nach Anspruch 1, dadurch gekennz ei chnet , dass die Welle (9) in ihrem Be¬ reich (10) im Querschnitt als Polygon ausgebildet ist.4. Fuel pump according to claim 1, characterized gekennz egg chnet, that the shaft (9) in its Be ¬ rich (10) is formed in cross section as a polygon.
5. Kraftstoffpumpe nach Anspruch 1, dadurch gekennz ei chnet , dass die Welle (9) in ihrem Be¬ reich (10) als Keilwelle (19) ausgebildet ist. 5. Fuel pump according to claim 1, characterized gekennz egg chnet, that the shaft (9) in its Be ¬ rich (10) as a splined shaft (19) is formed.
EP06754971A 2005-05-10 2006-05-03 Internal gear fuel pump Withdrawn EP1880108A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005021597A DE102005021597A1 (en) 2005-05-10 2005-05-10 Fuel pump
PCT/EP2006/061997 WO2006120138A1 (en) 2005-05-10 2006-05-03 Internal gear fuel pump

Publications (1)

Publication Number Publication Date
EP1880108A1 true EP1880108A1 (en) 2008-01-23

Family

ID=36658645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06754971A Withdrawn EP1880108A1 (en) 2005-05-10 2006-05-03 Internal gear fuel pump

Country Status (7)

Country Link
US (1) US20090016912A1 (en)
EP (1) EP1880108A1 (en)
JP (1) JP2008540910A (en)
KR (1) KR20080011380A (en)
CN (1) CN101171426A (en)
DE (1) DE102005021597A1 (en)
WO (1) WO2006120138A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2358851T3 (en) * 2007-05-01 2011-05-16 Superpar Otomotiv San. Ve Tic. A.S. INNOVATIVE ELECTRIC FUEL PUMPS FOR INTERNAL COMBUSTION ENGINES.
JP4535190B2 (en) 2008-02-07 2010-09-01 株式会社デンソー Fuel pump
DE102008043991A1 (en) * 2008-11-21 2010-05-27 Thielert Aircraft Engines Gmbh Fuel pump for internal combustion engines
FR2943744A1 (en) * 2009-03-24 2010-10-01 Inergy Automotive Systems Res ROTARY PUMP
DE102011089609A1 (en) * 2011-12-22 2013-06-27 Robert Bosch Gmbh Internal gear pump
DE102013223999A1 (en) * 2013-11-25 2015-05-28 Mahle International Gmbh Vane pump or pendulum vane pump
DE102016220641A1 (en) * 2016-10-20 2018-04-26 Continental Automotive Gmbh Fuel pump

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2169460A (en) * 1938-12-21 1939-08-15 Lyle E Broughton Socket head screw and method of making the same
USRE25291E (en) * 1956-06-08 1962-12-04 Fluid pressure device and valve
US4036031A (en) * 1974-08-02 1977-07-19 Woodling George V Universal connection means in an orbital fluid pressure device
JP2699390B2 (en) * 1988-03-28 1998-01-19 アイシン精機株式会社 Internal gear motor
ES2019781A6 (en) * 1990-01-15 1991-07-01 Weber Espana Sa Petrol pump for fuel injection systems
JP2546407Y2 (en) * 1991-02-19 1997-09-03 株式会社ユニシアジェックス Oil pump
JPH0579465A (en) * 1991-07-08 1993-03-30 Mitsubishi Materials Corp Internal gear type fluid pressure device
US5456818A (en) * 1993-11-03 1995-10-10 Ingersoll-Rand Company Method for preventing fretting and galling in a polygon coupling
US5425625A (en) * 1994-03-24 1995-06-20 Lenco Enterprises Co., Ltd. Car-used electric fuel pump
DE19719609A1 (en) * 1997-05-09 1998-11-12 Bosch Gmbh Robert Fuel supply unit for internal combustion engine
DE19726794A1 (en) * 1997-06-24 1999-01-07 Elektra Beckum Ag Water high pressure cleaning device
DE29916108U1 (en) * 1999-09-15 2001-01-25 Asf Thomas Ind Gmbh pump
JP2002195168A (en) * 2000-12-25 2002-07-10 Mitsuba Corp Trochoid pump
US6739850B2 (en) * 2001-10-25 2004-05-25 Kyosan Denki Co., Ltd. Motor-type fuel pump for vehicle
DE10224784A1 (en) * 2002-06-04 2003-12-18 Siemens Ag G-rotor pump
US6679692B1 (en) * 2002-07-12 2004-01-20 James J. Feuling Oil pump
JP2005016450A (en) * 2003-06-26 2005-01-20 Mitsubishi Materials Corp Inner rotor of inscribing gear pump
JP2005016448A (en) * 2003-06-26 2005-01-20 Mitsubishi Materials Corp Inner rotor of inscribing gear pump

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006120138A1 *

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US20090016912A1 (en) 2009-01-15
WO2006120138A1 (en) 2006-11-16
KR20080011380A (en) 2008-02-04
DE102005021597A1 (en) 2006-11-16
JP2008540910A (en) 2008-11-20
CN101171426A (en) 2008-04-30

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