EP0822329A2 - Kraftstoff-Förderpumpe für eine Kraftstoff-Einspritzpumpe für Brennkraftmaschinen - Google Patents
Kraftstoff-Förderpumpe für eine Kraftstoff-Einspritzpumpe für Brennkraftmaschinen Download PDFInfo
- Publication number
- EP0822329A2 EP0822329A2 EP97100911A EP97100911A EP0822329A2 EP 0822329 A2 EP0822329 A2 EP 0822329A2 EP 97100911 A EP97100911 A EP 97100911A EP 97100911 A EP97100911 A EP 97100911A EP 0822329 A2 EP0822329 A2 EP 0822329A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- feed pump
- fuel feed
- fuel
- drive element
- 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.)
- Granted
Links
Images
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
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—Safety arrangements; Monitoring
-
- 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
-
- 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
- F02M37/041—Arrangements for driving gear-type pumps
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2225/00—Synthetic polymers, e.g. plastics; Rubber
- F05C2225/04—PTFE [PolyTetraFluorEthylene]
Definitions
- the invention relates to a fuel feed pump for a Fuel injection pump for internal combustion engines according to the Genus of claim 1.
- a rotatingly driven pair with each other Intermeshing gears are provided which have fuel from one a suction tank connected along a suction tank between the face of the gears and the peripheral wall the pumping chamber formed in a conveying channel with the Fuel injection pump promotes connected pressure chamber.
- On A shaft is attached to a gear wheel, which is connected to the Shaft attacking drive element is driven to rotate.
- the drive element is outside the housing of the pump chamber provided and transmits the rotary movement by means of a Front toothing or cross disc clutch on one with the first gear meshing second gear on a housing-bearing axis is arranged.
- Such Drive elements are non-rotatable with the drive shaft connected.
- the known fuel delivery pump has the Disadvantage of that when commissioned Internal combustion engine through the fuel delivery pump amount of fuel delivered is significantly higher than that for the amount of fuel required for combustion. Furthermore can a jamming or blocking of the gears Damage to the connection between the drive element and occur of the driven shaft of the first gear.
- the fuel delivery pump according to the invention for a Has fuel injection pump for internal combustion engines on the other hand the advantage that through the intermediary an overload safety device between the Drive element and a first gear driving Avoid excessive pressure in the pressure chamber can be. Furthermore, the overload safety device an exceeding of a reaction moment of the maximum transmissible torque can be avoided. This can result in a jamming or blocking of the Gears through the overload safety device Decoupling between the drive element and the shaft be made possible, whereby an overuse of the shaft in Housing can be avoided. Furthermore, this shows Overload safety device has the advantage that a Compensation in the event of an axis interlock between the axis of the Shaft and the axis of the drive element can be given.
- FIG. 1 and 2 are different views of a Fuel feed pump shown in a not shown feed line from a storage tank to a Fuel injection pump used for internal combustion engines is.
- the feed pump in its housing 1 has one Pump chamber 3 in which a rotatingly driven pair intermeshing gears is arranged. Doing so a first gear wheel 7 fastened on a shaft 5 by means of of a drive element 8 via a more detailed below explained overload safety device 10 rotating driven and transmits this rotary movement by means of a Spur gear on a meshing with the first gear 7, second gear 9, which is mounted on a housing Axis 11 is arranged.
- the gears 7, 9 share the Pump chamber 3 by their tooth engagement in two parts, from which a first part a suction space 13 and a second Form part of a pressure chamber 15.
- the suction chamber 13 is there one each between the tooth grooves on the end faces of the first gear 7 and the second gear 9 and Circumferential wall of the pump chamber 3 formed with delivery channel 17 connected to the pressure chamber 45.
- the suction space 13 and the pressure chamber 15 each have a connection opening in the wall of the pump housing 1, via which the suction chamber 13 with a suction line from the storage tank, not shown and the pressure chamber 15 with a likewise not shown Delivery line to the suction chamber of the fuel injection pump connected is.
- the pump chamber 3 is on one end Axis direction of the shaft 5 and the axis 11 of one Closed cover 23, which in the representation of the Fig. 2 was removed and so a view of the pump interior enables.
- a bypass channel 25 is provided in the pump housing 1.
- This bypass channel 25 is through a bore in one that Pump chamber 3 on its facing away from the housing cover 23 Front end limiting, the pressure from the suction side separating and thereby forming a pump chamber wall Housing web 27 formed.
- the one forming the bypass channel 25 Hole is designed as a through hole, one of which End in the pressure chamber 15 and the other end in the Intake space 13 opens.
- the Opening pressure of the pressure valve can be adjustable.
- the drive element 8 is via the overload safety device 10 connected to the shaft 5. Therefore the drive element 8 has a bore 31 in which a Shaft section 32 of the shaft 5 is arranged. On the A circumferential groove 33 is introduced into the shaft section 32 who sits a connecting element 34. This is as an O-ring educated. Alternatively, a square ring, Spiral ring, tolerance ring or the like can be provided.
- the connecting element 34 is pressed into the bore 31 and thus forms a non-positive connection between the Bore 31 of the drive element 8 and the shaft section 32 the shaft 5.
- the shaft section 32 points in its Bore 31 facing end bevels 36. This makes it easier to assemble or put on the Drive element 8 given on the shaft portion 32.
- the overload safety device 10 allows axis interlocks between the longitudinal axis 37 of the shaft 5 and the longitudinal axis 38 of the drive element 8 can be balanced and that both parts in any Angular position can be joined. Furthermore, an axial Distance between the drive element 8 and that in the bore 31 arranged shaft section 32 can be compensated.
- the Bore 31, which is designed as a blind hole, has for a depth greater than the length of the shaft portion 32 to be received.
- the connecting element 34 temperature-resistant plastic, preferably a Corridor elastomer, provided.
- a Sheet metal sleeve is provided instead of the O-ring Connecting element 34 on the shaft section 32 .
- This sheet metal sleeve can advantageously be designed as a corrugated sheet metal sleeve, so that again in Dependence of the contact surfaces between the sheet metal sleeve and the bore 37 and between the sheet metal sleeve and Shaft section 32 a certain maximum transferable Torque can be provided.
- the Drive element 8 engages in a bore of the shaft 5, so that this inventive arrangement 10 in analogy within a bore of the shaft 5 can be arranged.
- two or more Overload safety devices 10 connected in series could be. This can advantageously be a larger one Compensation of the possibly not coaxial to each other extending longitudinal axis 37 of the shaft 5 and longitudinal axis 38 of the Drive element 8 be given.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
- Gear Transmission (AREA)
- Rotary Pumps (AREA)
- Transmission Devices (AREA)
Abstract
Description
- Fig. 1
- einen Längsschnitt durch die Kraftstoff-Förderpumpe entlang der Linie I-I von Fig. 2 und
- Fig. 2
- eine Draufsicht auf die in Fig. 1 dargestellte Kraftstoff-Förderpumpe mit abgenommenem Gehäusedeckel.
Claims (10)
- Kraftstoff-Förderpumpe für eine Kraftstoff-Einspritzpumpe für Brennkraftmaschinen, mit einem in einer Pumpkammer (3) rotierend angetriebenen Paar miteinander kämmender Zahnräder (7, 9), die Kraftstoff aus einem mit einem Vorratstank verbundenen Ansaugraum (13) entlang einem zwischen der Stirnfläche der Zahnräder (7, 9) und der Umfangswand der Pumpkammer (3) gebildeten Förderkanal (17) in einen, mit der Kraftstoff-Einspritzpumpe verbundenen Druckraum (15) fördern, mit einem auf einer Welle (5) befestigten Zahnrad (7), das mittels eines an der Welle (5) angreifenden Antriebselementes (8) rotierend antreibbar ist, dadurch gekennzeichnet, daß das Antriebselement (8) mit einer Überlast-Sicherungsvorrichtung (10) zur Welle (5) verbindbar ist.
- Kraftstoff-Förderpumpe nach Anspruch 1, dadurch gekennzeichnet, daß die Überlast-Sicherungsvorrichtung (10) einen in einer Bohrung (31) des Antriebselementes (8) angeordneten Wellenabschnitt (32) der Welle (5) aufweist und kraftschlüssig mit der Bohrung (31) verbunden ist.
- Kraftstoff-Förderpumpe nach Anspruch 2, dadurch gekennzeichnet, daß auf dem Wellenabschnitt (32) ein elastisches Verbindungselement (34) vorgesehen ist, das in die Bohrung (31) des Antriebselementes (8) eingepreßt ist.
- Kraftstoff-Förderpumpe nach Anspruch 3, dadurch gekennzeichnet, daß das elastische Verbindungselement (34) als O-Ring, vorzugsweise als 4-Kant-Ring ausgebildet ist.
- Kraftstoff-Förderpumpe nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß der Wellenabschnitt (32) eine das elastische Verbindungselement (34) aufnehmende Umfangsnut (38) aufweist.
- Kraftstoff-Förderpumpe nach Anspruch 3, dadurch gekennzeichnet, daß das elastische Verbindungselement (34) als Blechhülse, vorzugsweise als gewellte Blechhülse, ausgebildet ist.
- Kraftstoff-Förderpumpe nach Anspruch 3, dadurch gekennzeichnet, daß das elastische Verbindungselement (34) als Spiralring oder Toleranzring ausgebildet ist.
- Kraftstoff-Förderpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zumindest ein geringer Achsversatz zwischen einer Längsachse (37) der Welle (5) und einer Längsachse (38) des Antriebselementes (8) durch die Überlast-Sicherungsvorrichtung (10) ausgleichbar ist.
- Kraftstoff-Förderpumpe nach Anspruch 2, dadurch gekennzeichnet, daß ein Achsabstand zwischen dem Wellenabschnitt (32) der Welle (5) und der Bohrung (31) des Antriebselementes (8) ausgleichbar ist.
- Kraftstoff-Förderpumpe nach Anspruch 2, dadurch gekennzeichnet, daß die Welle (5) in beliebiger Winkellage zum Antriebselement (8) axial fügbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19625488A DE19625488C2 (de) | 1996-06-26 | 1996-06-26 | Kraftstoff-Förderpumpe für eine Kraftstoff-Einspritzpumpe für Brennkraftmaschinen |
DE19625488 | 1996-06-26 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0822329A2 true EP0822329A2 (de) | 1998-02-04 |
EP0822329A3 EP0822329A3 (de) | 1999-02-17 |
EP0822329B1 EP0822329B1 (de) | 2003-01-08 |
Family
ID=7798017
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97100911A Expired - Lifetime EP0822329B1 (de) | 1996-06-26 | 1997-01-22 | Kraftstoff-Förderpumpe für eine Kraftstoff-Einspritzpumpe für Brennkraftmaschinen |
Country Status (3)
Country | Link |
---|---|
US (1) | US6050795A (de) |
EP (1) | EP0822329B1 (de) |
DE (2) | DE19625488C2 (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19913774A1 (de) * | 1999-03-26 | 2000-10-05 | Bosch Gmbh Robert | Kraftstofffördereinheit |
DE19913804A1 (de) | 1999-03-26 | 2000-09-28 | Bosch Gmbh Robert | Kraftstoff-Förderpumpe |
DE19914269A1 (de) | 1999-03-29 | 2000-10-19 | Bosch Gmbh Robert | Kupplung und Kraftstoffförderpumpe mit Kupplung |
DE19959020A1 (de) * | 1999-12-08 | 2001-06-13 | Bosch Gmbh Robert | Hydroaggregat mit zumindest einer Verdrängermaschine, insbsondere mit einer Radialkolbenmaschine (Pumpen oder Motor) |
DE10058012A1 (de) * | 2000-11-23 | 2002-05-29 | Bosch Gmbh Robert | Zahnradförderpumpe, insbesondere zum Fördern von Kraftstoff zu einer Kraftstoffhochdruckpumpe |
US9004890B2 (en) * | 2007-03-20 | 2015-04-14 | Oerlikon Textile Gmbh & Co. Kg | Gear wheel pump |
US9790997B2 (en) | 2014-09-17 | 2017-10-17 | Electro-Motive Diesel, Inc. | Assembly for preventing abuse of a pump mounted to a driver equipment |
US10302141B2 (en) | 2016-02-03 | 2019-05-28 | Cummins Inc. | Drive coupling for connecting drive shaft to output member |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB484877A (en) * | 1936-12-12 | 1938-05-11 | Leon Thiry | Improvements in or relating to elastic joints |
DE843776C (de) * | 1939-10-14 | 1952-07-14 | Auxiliaire D Ind Sadi S P R L | UEberlastungskupplung |
DE844229C (de) * | 1942-01-17 | 1952-07-17 | Auto Union A G | Kraftstoff-Foerderpumpe |
US2629326A (en) * | 1945-02-20 | 1953-02-24 | Harold C White | Pump |
US2848884A (en) * | 1955-11-17 | 1958-08-26 | Gen Electric | Gear |
AT209111B (de) * | 1958-03-15 | 1960-05-25 | Friedmann & Maier Ag | Als Zahnradpumpe ausgebildete Zubringerpumpe für Brennstoffeinspritzpumpen |
US3080735A (en) * | 1961-03-16 | 1963-03-12 | Edeliff Instr | Instrument shaft release clutch |
US3146612A (en) * | 1963-02-01 | 1964-09-01 | Michigan Wheel Company | Coupling |
US4242782A (en) * | 1979-06-08 | 1981-01-06 | Ppg Industries, Inc. | Ceramic conveyor rolls with metal end caps frictionally fixed thereto |
DD151208A1 (de) * | 1980-05-30 | 1981-10-08 | Hermann Blackstein | Pumpenaggregat fuer spritzgeraete |
DE4441505A1 (de) * | 1994-11-22 | 1996-05-23 | Bosch Gmbh Robert | Kraftstoff-Förderpumpe für eine Kraftstoffeinspritzpumpe für Brennkraftmaschinen |
-
1996
- 1996-06-26 DE DE19625488A patent/DE19625488C2/de not_active Expired - Fee Related
-
1997
- 1997-01-22 EP EP97100911A patent/EP0822329B1/de not_active Expired - Lifetime
- 1997-01-22 DE DE59709074T patent/DE59709074D1/de not_active Expired - Fee Related
- 1997-06-24 US US08/881,283 patent/US6050795A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
None |
Also Published As
Publication number | Publication date |
---|---|
DE19625488C2 (de) | 2000-03-02 |
DE19625488A1 (de) | 1998-01-15 |
US6050795A (en) | 2000-04-18 |
EP0822329A3 (de) | 1999-02-17 |
EP0822329B1 (de) | 2003-01-08 |
DE59709074D1 (de) | 2003-02-13 |
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