EP0970309A1 - Radialkolbenpumpe zur kraftstoffhochdruckversorgung - Google Patents
Radialkolbenpumpe zur kraftstoffhochdruckversorgungInfo
- Publication number
- EP0970309A1 EP0970309A1 EP98963344A EP98963344A EP0970309A1 EP 0970309 A1 EP0970309 A1 EP 0970309A1 EP 98963344 A EP98963344 A EP 98963344A EP 98963344 A EP98963344 A EP 98963344A EP 0970309 A1 EP0970309 A1 EP 0970309A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive shaft
- piston pump
- radial piston
- pump according
- radial
- 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
- 239000000446 fuel Substances 0.000 title claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0439—Supporting or guiding means for the pistons
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
- F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
- F04B1/0421—Cylinders
Definitions
- the invention relates to a radial piston pump for high-pressure fuel supply
- Fuel injection systems of internal combustion engines in particular in a common rail injection system, with a drive shaft mounted in a pump housing, which is eccentrically formed or has cam-like elevations in the circumferential direction, and preferably with a plurality of pistons arranged radially with respect to the drive shaft in a respective cylinder space, which rotate the drive shaft can be moved back and forth in the respective cylinder space in the radial direction.
- the present invention can be used not only with a radial piston pump, but also with high-pressure pumps, in particular with a demand quantity control.
- the base of the piston is in contact with the drive shaft.
- the pistons are successively caused to reciprocate by the eccentricity of the drive shaft or by the cam-like elevations on the drive shaft.
- the rotating drive shaft does not apply to the pistons only forces applied in the radial direction with respect to the drive shaft, ie in the longitudinal direction of the pistons, but also transversely to the pistons. These transverse forces create a moment on the respective piston.
- the invention is therefore based on the problem of providing a radial piston pump which overcomes the disadvantages mentioned above.
- damage to the piston foot, such as cage breaks, should be prevented, so that proper operation of the
- Radial piston pump is guaranteed even with partial filling.
- the radial piston pump according to the invention is designed to withstand a pump pressure of up to 2000 bar.
- a radial piston pump for high-pressure fuel supply
- Fuel injection systems of internal combustion engines in particular in a common rail injection system, with a drive shaft mounted in a pump housing, which is eccentrically formed or has cam-like elevations in the circumferential direction, and preferably with a plurality of pistons arranged radially with respect to the drive shaft in a respective cylinder space, which can be moved back and forth in the respective cylinder space by rotating the drive shaft in the radial direction, in that a transverse force receiving device is arranged between the pistons and the drive shaft.
- the damage to the piston foot is caused by the moments acting on the piston.
- the transverse force absorption device absorbs the forces acting transversely to the pistons.
- a special embodiment of the invention is characterized in that the transverse force absorption device can be moved back and forth in the same direction as the associated piston. This ensures that forces from the drive shaft in the radial direction, i.e. in
- Shear force absorption device can be delivered to the piston.
- the reciprocating movement of the pistons required for the operation of the pump is thus the
- Shear force absorption device each in a hole in the housing is guided, which extends in the same direction as the associated cylinder space.
- the guide enables the lateral force absorption device to be moved back and forth even at high pump pressures and rapid load changes. In particular, tilting of the transverse force absorption device in the cylinder space is avoided.
- Shear force receiving device is a tappet with a cup-shaped body.
- a cup-shaped tappet is particularly well suited for absorbing the transverse forces.
- Other shapes that fulfill the same function are also conceivable.
- Another particular embodiment of the invention is characterized in that the bottom of the tappet is formed by a force-absorbing plate.
- Force absorption plate is in contact with the drive shaft and can have a different thickness depending on the load.
- the surface of the force absorption plate can be specially treated to ensure high wear resistance.
- Another special embodiment of the invention is characterized in that the force absorption plate is connected to a guide ring by the cup-shaped body.
- the guide ring slides in the cylinder space.
- the surface in contact with the cylinder space can be specially treated to minimize the frictional forces.
- the guide ring ensures that the transverse force absorption device does not become jammed in the cylinder space.
- the dimensions of the guide ring depend on the pump pressure and the number of load changes per Time unit.
- Another particular embodiment of the invention is' t characterized in that several openings are provided in the cup-shaped body.
- the openings serve to equalize the pressure and ensure that there is only a minimal pressure difference between the space surrounding the drive shaft and the respective cylinder space even when the full stroke is used.
- the increase in Hertz 'pressure in the useful stroke remains small and full filling of the element is ensured in the suction stroke.
- Another special embodiment of the invention is characterized in that the pistons are each pressed by a spring against the associated force-absorbing plate of the tappet.
- the piston is moved towards the drive shaft by the spring force, so that fuel is drawn in.
- the force receiving plate of the bucket tappet is pressed against the drive shaft by a spring.
- the force-receiving plate it would be necessary for the force-receiving plate to be connected to the piston in order to ensure the intake of fuel. If the spring force is applied directly to the piston, this connection between the force-receiving plate and the piston can be omitted.
- This variant has the advantage that such a radial piston pump can be produced easily and inexpensively.
- the application of the present invention to known radial piston pumps is readily possible.
- Another special embodiment of the invention is characterized in that the force receiving plate is slightly convex on the side facing the drive shaft.
- the convex formation of the Force plate serves to reduce the contact area between the drive shaft and force plate. This advantageously reduces the torque applied to the bucket tappet by the drive shaft.
- the elastic deformation of the tappet must be taken into account.
- Another special embodiment of the invention is characterized in that a ring is arranged between the drive shaft and the tappets.
- the ring is used to transmit the forces from the drive shaft to the force plate.
- the ring is advantageously slidably mounted on the drive shaft.
- the ring can be either cylindrical or polygonal.
- the present invention generally has the advantage that it can be implemented simply and inexpensively.
- the basic idea of the present invention can easily be applied to existing radial piston pumps, e.g. one provided on the piston
- Ram plate is replaced by a bucket tappet.
- the component strength is increased, especially with zero delivery in the suction stroke.
- FIG. 1 shows a sectional view of a radial piston pump according to the invention
- FIG. 2 shows a section along line AB through the radial piston pump from FIG. 1;
- Figure 3 shows a bottom view of a tappet according to the invention
- FIG. 4 shows the representation of a section through the cup tappet from FIG. 3 along the line B-C;
- Figure 5 shows a sectional view of another
- FIG. 6 shows a section along the line A-B through the radial piston pump from FIG. 5.
- Figures 1 and 2 show a radial piston pump for high-pressure fuel supply
- the fuel supply and dimensioning takes place via a metering unit, not shown.
- the radial piston pump according to the invention is particularly in
- Common-rail injection systems used for the fuel supply of diesel engines.
- “Common rail” means “common line” or “common rail”.
- the injection nozzles in common-rail injection systems are fed from a common line.
- the radial piston pump shown in FIGS. 1 and 2 comprises a one mounted in a pump housing 2 Drive shaft 4 with an eccentrically designed shaft section 6.
- a ring 8 is provided on the eccentric shaft section 6, with respect to which the shaft section 6 can be rotated.
- the ring 8 comprises three flats 10, each offset by 120 ′′ from each other, against which a piston 12 is supported.
- the pistons 12 are each received in a cylinder space 18 for reciprocation in the radial direction in relation to the drive shaft 4.
- a spring plate 13 is fastened, against which a spring 14 is biased.
- the spring 14 presses the piston 12 against a force receiving plate 15, which belongs to a tappet 9, which is shown enlarged in the scale 2: 1 in FIGS. 3 and 4.
- the force receiving plate 15 has the shape of a round disk, on the circumference of which four rectangular recesses 16 are evenly distributed.
- the force absorption plate 15 is connected to a guide ring 19 by a cup-shaped body 17.
- the openings 16 each extend from the force receiving plate 15 into the cup-shaped body 17.
- the size of the openings 16 is selected so that when the cup tappet 9 is moved back and forth, pressure equalization takes place between the space in which the ring 8 is arranged and the space in which the spring 14 is arranged.
- the openings 16 ensure that the pressure difference between the aforementioned rooms is minimal in all operating conditions.
- the tappet according to the invention absorbs the forces in the circumferential direction of the ring 8.
- the cup tappet 9, as shown in FIGS. 1 and 2 is guided through the guide ring 19 in a bore 24 in the housing 2.
- the bore extends in the same direction as the associated cylinder space 18.
- This support of the cup tappet 9 in the housing 2 guides the transverse forces from the ring 8 via the force absorption plate 15, the cup-shaped body 17 and the guide ring 19 into the housing 2 .
- the result of this is that only forces are applied to the pistons 12 in their respective longitudinal directions. This considerably reduces the load and wear on the pistons 12.
- the radial piston pump shown in Figures 5 and 6 largely corresponds to the embodiment shown in Figures 1 and 2. For this reason, the same reference numerals have been used for parts which are contained both in the radial piston pump in FIGS. 1 and 2 and in FIGS. 5 and 6. In order to avoid repetitions, a description of such parts is omitted in the explanation of FIGS. 5 and 6.
- the main difference between the embodiment of Figures 5 and 6 compared to the embodiment of Figures 1 and 2 is that the ring 8 in the radial piston pump shown in Figures 5 and 6 does not have the shape of a polygon, but is cylindrical.
- the cup tappet 9 is the same in both embodiments and corresponds to the cup tappet 9, which is shown enlarged in FIGS. 3 and 4.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19753593 | 1997-12-03 | ||
DE19753593A DE19753593A1 (de) | 1997-12-03 | 1997-12-03 | Radialkolbenpumpe zur Kraftstoffhochdruckversorgung |
PCT/DE1998/003321 WO1999028625A1 (de) | 1997-12-03 | 1998-11-12 | Radialkolbenpumpe zur kraftstoffhochdruckversorgung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0970309A1 true EP0970309A1 (de) | 2000-01-12 |
EP0970309B1 EP0970309B1 (de) | 2003-09-03 |
EP0970309B2 EP0970309B2 (de) | 2009-04-22 |
Family
ID=7850594
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98963344A Expired - Lifetime EP0970309B2 (de) | 1997-12-03 | 1998-11-12 | Radialkolbenpumpe zur kraftstoffhochdruckversorgung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6250893B1 (de) |
EP (1) | EP0970309B2 (de) |
JP (1) | JP4308921B2 (de) |
DE (2) | DE19753593A1 (de) |
WO (1) | WO1999028625A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19844326B4 (de) * | 1998-09-28 | 2006-01-05 | Robert Bosch Gmbh | Radialkolbenpumpe |
DE19956092A1 (de) * | 1999-11-22 | 2000-10-26 | Siemens Ag | Kolbenpumpe, insbesondere Hochdruck-Radialkolbenpumpe |
DE10147981A1 (de) * | 2001-09-28 | 2003-04-24 | Siemens Ag | Verbindungselement zur Verbindung eines Kolbens mit einem Rückstellelement |
DE10200792A1 (de) * | 2002-01-11 | 2003-07-31 | Bosch Gmbh Robert | Kraftstoffpumpe für eine Brennkraftmaschine |
KR100539209B1 (ko) * | 2002-08-29 | 2005-12-27 | 주식회사 두원정공 | 고압 서플라이 펌프 |
EP1760312B1 (de) * | 2003-02-11 | 2013-05-01 | Ganser-Hydromag AG | Hochdruckpumpe |
GB0311814D0 (en) * | 2003-05-22 | 2003-06-25 | Delphi Tech Inc | Pump assembly |
DE10347715A1 (de) * | 2003-10-14 | 2005-05-12 | Zahnradfabrik Friedrichshafen | Radialkolbenpumpe |
DE102004023541A1 (de) * | 2004-05-13 | 2005-12-01 | Robert Bosch Gmbh | Hochdruckpumpe für eine Kraftstoffeinspritzeinrichtung einer Brennkraftmaschine |
SE531362C2 (sv) * | 2005-06-20 | 2009-03-10 | Oehlins Racing Ab | Pumpanordning för bl a fram- och bakhjulsdriven motorcykel |
WO2007071661A1 (de) * | 2005-12-20 | 2007-06-28 | Industriehansa Consulting & Engineering Gmbh | Hochdruckpumpe mit mehreren kolben pro zylinder |
DE102007019261A1 (de) | 2007-04-17 | 2008-10-23 | Golle Motor Ag | Radialkolbenpumpe, insbes. für Common Rail (CR)-Einspritzsysteme |
HUE026768T2 (en) * | 2007-10-12 | 2016-07-28 | Delphi Int Operations Luxembourg Sarl | Fuel Pump Improvements |
DE102008000954A1 (de) | 2008-04-03 | 2009-10-08 | Robert Bosch Gmbh | Hochdruckkraftstoffpumpe mit optimierter Schmierung |
DE102008001869A1 (de) | 2008-05-20 | 2009-11-26 | Robert Bosch Gmbh | Radialkolbenpumpe |
KR20130056253A (ko) * | 2011-08-30 | 2013-05-29 | 미츠비시 쥬고교 가부시키가이샤 | 재생 에너지 터빈 발전기 내의 유압 펌프를 위한 커버 |
GB201503556D0 (en) * | 2015-03-03 | 2015-04-15 | Delphi International Operations Luxembourg S.�.R.L. | High temperature fuel deflector for a fuel pump drive assembly |
CN108915919B (zh) * | 2018-08-28 | 2023-10-20 | 河南柴油机重工有限责任公司 | 一种高压共轨柴油机共轨泵驱动装置 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3066610A (en) * | 1961-01-26 | 1962-12-04 | Greenlee Bros & Co | Pump |
DE2529473C3 (de) † | 1975-07-02 | 1980-11-20 | Danfoss A/S, Nordborg (Daenemark) | Gleitschuhanordnung, insbesondere für Axial- und Radialkolbenmaschinen |
WO1983000724A1 (en) * | 1979-10-19 | 1983-03-03 | Clouse, Jerry, A. | Lifter assembly |
DE2951012A1 (de) * | 1979-12-19 | 1981-07-23 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Pumpenanordnung |
EP0216774A4 (de) * | 1984-07-03 | 1987-05-13 | Baralaba Pty Ltd | Pumpe für flüssigkeiten. |
DE3721698A1 (de) * | 1987-07-01 | 1989-01-19 | Hauhinco Maschf | Radialkolbenpumpe fuer die foerderung von wasser |
IT212433Z2 (it) * | 1987-08-25 | 1989-07-04 | Weber Srl | Pompa a stantuffi radiali |
DE3804025A1 (de) | 1988-02-10 | 1989-08-24 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE4216877C2 (de) * | 1991-08-12 | 1996-08-29 | Elasis Sistema Ricerca Fiat | Radialkolbenpumpe |
GB2260374A (en) * | 1991-10-12 | 1993-04-14 | Lucas Ind Plc | Fuel pump |
US5630708A (en) * | 1993-12-28 | 1997-05-20 | Zexel Corporation | Radial piston pump for low-viscosity fuel |
DE4401074B4 (de) * | 1994-01-15 | 2007-01-18 | Robert Bosch Gmbh | Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine |
DE19507295B4 (de) † | 1995-03-02 | 2004-09-02 | Siemens Ag | Radialkolbenpumpe, insbesondere Kraftstoffpumpe für einen Verbrennungsmotor |
DE19517628A1 (de) * | 1995-05-13 | 1996-11-14 | Luk Automobiltech Gmbh & Co Kg | Radialkolbenpumpe |
DE19523283B4 (de) * | 1995-06-27 | 2006-01-19 | Robert Bosch Gmbh | Pumpe, insbesondere Hochdruckpumpe für eine Kraftstoffeinspritzvorrichtung eines Verbrennungsmotors |
DE19549108A1 (de) * | 1995-12-29 | 1997-07-03 | Bosch Gmbh Robert | System zur Kraftstoffhochdruckerzeugung für ein in Brennkraftmaschinen eingesetztes Kraftstoffeinspritzsystem |
GB9610785D0 (en) * | 1996-05-23 | 1996-07-31 | Lucas Ind Plc | Radial piston pump |
JPH1030525A (ja) * | 1996-07-16 | 1998-02-03 | Denso Corp | 高圧サプライポンプ |
IT239879Y1 (it) * | 1996-12-23 | 2001-03-13 | Elasis Sistema Ricerca Fiat | Perfezionamenti ad una pompa a pistoni, in particolare ad una pompa apistoni radiali per il carburante di un motore a combustione interna. |
-
1997
- 1997-12-03 DE DE19753593A patent/DE19753593A1/de not_active Ceased
-
1998
- 1998-11-12 DE DE59809494T patent/DE59809494D1/de not_active Expired - Lifetime
- 1998-11-12 JP JP52962599A patent/JP4308921B2/ja not_active Expired - Fee Related
- 1998-11-12 EP EP98963344A patent/EP0970309B2/de not_active Expired - Lifetime
- 1998-11-12 WO PCT/DE1998/003321 patent/WO1999028625A1/de active IP Right Grant
- 1998-11-12 US US09/355,756 patent/US6250893B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9928625A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0970309B1 (de) | 2003-09-03 |
EP0970309B2 (de) | 2009-04-22 |
JP2001510531A (ja) | 2001-07-31 |
DE59809494D1 (de) | 2003-10-09 |
US6250893B1 (en) | 2001-06-26 |
WO1999028625A1 (de) | 1999-06-10 |
DE19753593A1 (de) | 1999-06-17 |
JP4308921B2 (ja) | 2009-08-05 |
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