EP1556606A1 - Radialkolbenpumpe zur kraftstoffhochdruckversorgung - Google Patents
Radialkolbenpumpe zur kraftstoffhochdruckversorgungInfo
- Publication number
- EP1556606A1 EP1556606A1 EP03722224A EP03722224A EP1556606A1 EP 1556606 A1 EP1556606 A1 EP 1556606A1 EP 03722224 A EP03722224 A EP 03722224A EP 03722224 A EP03722224 A EP 03722224A EP 1556606 A1 EP1556606 A1 EP 1556606A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubrication
- piston pump
- plates
- plate
- radial piston
- 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 26
- 238000005461 lubrication Methods 0.000 claims abstract description 61
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 238000002485 combustion reaction Methods 0.000 claims abstract description 5
- 230000001050 lubricating effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000008092 positive effect 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
- F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
-
- 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
- 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
- F02M59/10—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 the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- 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
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
Definitions
- the invention is based on a radial piston pump for supplying high-pressure fuel in fuel injection systems of internal combustion engines, in particular in a common rail injection system, with preferably a plurality of pistons arranged radially in a cylinder bore with respect to a drive shaft mounted in a pump housing, the pistons having a piston foot and a piston skirt, with a attached to each piston foot 'plate for transmitting the conveying movement from an eccentric portion of the drive shaft and cooperating with the polygonal ring on the piston, the polygonal ring having flattenings, which lie up the plates.
- Such a radial piston pump is known, for example, from DE 197 29 788 AI or from DE 101 50 351.2, which has not yet been published.
- the invention has for its object a
- Fuel injection systems of internal combustion engines with preferably a plurality of pistons arranged radially in a cylinder bore with respect to a drive shaft mounted in a pump housing, the pistons having a piston foot and a piston shaft, with a plate attached to each piston foot for transmitting the conveying movement from an eccentric section of the drive shaft and a cooperating polygon ring on the piston, the polygon ring having flats on which the plates rest, solved in that at least one lubrication pocket is incorporated in each of the plates.
- the lubrication pocket is arranged centrally in the plate.
- the surface pressure between the plate and the polygon ring is very even, which also has a positive effect on the load capacity of the plain bearing.
- the lubrication pockets have a depth of 0.001 mm - 0.1 mm and / or the diameter.
- the lubrication pockets is about 1/3 to 2/3 x the diameter of the plates.
- the lubrication pocket concave. This makes it easier to fill the lubrication pocket during the suction stroke.
- the filling • the lubrication pocket during the intake stroke and the formation of a stable lubricating film during the delivery stroke can be further supported if the dimensions of the plates, in particular their thickness, are selected to be that the plates flex during the delivery stroke and the volume of the lubricating pockets further reduce.
- the deflection of the plates can be very small and only a few ⁇ m.
- At least one lubrication groove can be incorporated in the flats of the polygon ring.
- the polygonal ring Connects between the interior of the pump housing and the lubrication pockets.
- the polygonal ring is laterally deflected relative to the plates when the eccentric section of the drive shaft moves between top and bottom dead center. It is important to ensure that the hydraulic connection between the interior of the pump housing and the lubrication pockets is established when the piston moves from top dead center to bottom dead center in the suction stroke.
- the flats of the polygon ring can also be dimensioned such that when the polygon ring is laterally deflected relative to the plates, a hydraulic connection is established between the interior of the pump housing and the lubrication pockets.
- the lubrication pockets at the top dead center of the piston have no hydraulic connection to the interior of the pump housing, since the plain bearing between the plate and the polygon ring is exposed to its maximum load at top dead center.
- the hydraulic connection between the interior of the pump housing and the lubrication pockets should be interrupted before reaching top dead center, since only then does the desired formation of a lubricating part between the plate and the Pdlygon ring take place by displacing fuel from the lubrication pockets and the lubrication gap.
- FIG. 1 shows an exemplary embodiment of a radial piston pump according to the invention in cross section
- Figures 2 to 4 a first embodiment of a plate according to the invention and a polygon ring according to the invention in different
- Figure 5 shows a second embodiment of a plate according to the invention and a polygon ring according to the invention.
- Fig. 1 is a cross section through an embodiment of a radial piston pump 1 according to the invention
- a pump element 3 consists of a cylinder bore 9 and a piston 11 which is sealingly guided in the cylinder bore 9.
- the piston 11 in turn consists of a piston shaft 13 and a piston foot 15.
- the piston foot 15 is non-positively connected to a plate 17.
- a polygonal ring 19 with flats 21 is arranged between the eccentric section of the drive shaft 5 and the plates 17 shown in FIG.
- the polygon ring 19 serves to rotate the implement eccentric section of the drive shaft 5 in an oscillating movement.
- the polygonal ring 19 oscillates once in the direction of the 5 longitudinal axis of the pistons 11 and perpendicular to the longitudinal direction of the pistons 11.
- the polygonal ring 19 should not rotate in order to tilt between the flat 21 and the plates 17 prevent.
- there is a sliding movement between plates 17 and the associated flat 21 The direction of the sliding movement between plate 17 and flat 21 is indicated in FIG. 1 by the double arrows V.
- the piston 13 of the pump element 3 protruding vertically upwards in FIG. 1 is almost at the top dead center
- the plate 17 lies approximately in the center on the associated flat 21 of the polygon ring 19. In the TDC, the plate 17 lies exactly on the flat 21.
- the two other pump elements 3 are located between their top dead center and their bottom dead center.
- the plate 17 does not lie centrally on the associated flat 21.
- This state is referred to in connection with the invention as a lateral deflection of the polygon ring 19 relative to the plates 17. 25. Particularly clear. the lateral deflection of the polygon ring 19
- lubrication between plate 17 and flattening 21 is absolutely necessary.
- the lubrication is carried out with fuel (not shown), which is present in an interior 25 of the housing 7-35. If the piston 13 of. Moving from its top dead center to its bottom dead center, it is held in contact with the associated flattening 21 by means of a compression spring 27 which is supported at one end against the housing 7 and at the other end against the plate 17 which is firmly connected to the piston foot. Since the contact pressure of the compression spring 27 is very much less than the axial force transmitted from the polygon ring to the plate 17 during the delivery stroke, the lubrication gap between the plate 17 and increases
- Polygon ring 19 during the suction stroke.
- the fuel is completely displaced from the lubrication gap between the plate 17 and the polygon ring 19, so that there is direct contact between the plate 17 and the polygon ring 19 can come and as a result an inadmissibly high temperature development and "seizing" between polygon ring 19 and plate 17 can take place.
- 17 lubrication pockets 29 are provided in the plates, whose geometry and dimensions are based on the following FIGS. 2 and 5 are explained in detail ⁇ .
- a polygon ring 19 and a plate 17 are shown enlarged.
- the plate 17 ' is shown in section.
- the piston foot 15 (see FIG. 1) is shown in FIGS. 2 - 5 not shown for reasons of clarity.
- the lubrication pockets 29 are concave in this embodiment and have a circular cross section. It turned out to be advantageous proved, when the depth of the dimples 29 about 0.001 mm - 0.1 mm and the extension of the lubricating pockets 29 about - the diameter of the plate 'corresponds to 17th
- a lubrication groove 31 is arranged in the flat 27.
- the lubrication groove 31 starts in this embodiment on the edge 'of the flattened portion 21 and provides a hydraulic connection between the internal space 25 (see Fig. 1) and the lubricating pocket when the polygonal ring is deflected laterally 19 relative to the plate 17 29 forth. This is the case in the position of the polygon ring 19 shown in FIG. 2.
- the volume of the lubrication pocket 29 decreases during the delivery stroke of the pump element 3, not shown, so that fuel is forced out of the lubrication pocket through the lubrication gap between plate 17 and Flattening 21 enters the interior of the housing 7.
- This effect can be further supported by suitable dimensioning of the plate 17.
- the plate is designed to be "soft", it acts like a spring which relaxes during the suction stroke and thus sucks fuel into the lubrication pocket 29 and bends through the axial force F during the delivery stroke in such a way that the lubrication pocket 29 or its Volume is reduced. It should of course be ensured that the plate 17 is only elastically deformed and does not break.
- FIG. 5 shows a second exemplary embodiment of a plate 17 according to the invention and a polygon ring 19 according to the invention.
- no lubrication groove 31 is provided in the flat 21 of the polygon ring 19.
- the flattened portion 21 is dimensioned in such a way that with maximum lateral deflection of the polygon ring 19 relative to the plate 17.
- Lubrication pocket 29 protrudes beyond the flat 21.
- This State is shown in Fig. 5 with solid lines. This inevitably sets up a hydraulic connection between the interior 25 (see FIG. 1) and the lubrication pocket 29.
- the connection between the lubrication pocket 29 and the interior 25 interrupted and there is a compulsory formation of a
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10247645 | 2002-10-11 | ||
| DE2002147645 DE10247645A1 (de) | 2002-10-11 | 2002-10-11 | Radialkolbenpumpe zur Kraftstoffhochdruckversorgung |
| PCT/DE2003/000879 WO2004036031A1 (de) | 2002-10-11 | 2003-03-18 | Radialkolbenpumpe zur kraftstoffhochdruckversorgung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1556606A1 true EP1556606A1 (de) | 2005-07-27 |
| EP1556606B1 EP1556606B1 (de) | 2006-09-06 |
Family
ID=32038570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03722224A Expired - Lifetime EP1556606B1 (de) | 2002-10-11 | 2003-03-18 | Radialkolbenpumpe zur kraftstoffhochdruckversorgung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1556606B1 (de) |
| DE (2) | DE10247645A1 (de) |
| WO (1) | WO2004036031A1 (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004018163A1 (de) * | 2004-04-14 | 2005-11-10 | Siemens Ag | Radialkolbenpumpe |
| JP4428327B2 (ja) * | 2005-09-22 | 2010-03-10 | 株式会社デンソー | 高圧燃料供給ポンプ |
| DE102006045897B4 (de) * | 2006-09-28 | 2008-09-11 | Continental Automotive Gmbh | Radialkolbenpumpe zur Kraftstoffhochdruckversorgung |
| DE102007019261A1 (de) | 2007-04-17 | 2008-10-23 | Golle Motor Ag | Radialkolbenpumpe, insbes. für Common Rail (CR)-Einspritzsysteme |
| ITMI20080704A1 (it) * | 2008-04-17 | 2009-10-18 | Bosch Gmbh Robert | Pompa common rail di alta pressione e impianto di alimentazione di combustibile di un motore common rail comprendente tale pompa |
| DE102008001713A1 (de) * | 2008-05-13 | 2009-11-19 | Robert Bosch Gmbh | Radialkolbenpumpe |
| GB201202221D0 (en) * | 2012-02-09 | 2012-03-28 | Delphi Tech Holding Sarl | Improvements relating to fuel pumps |
| CN104234897B (zh) * | 2013-06-17 | 2016-05-25 | 北京亚新科天纬油泵油嘴股份有限公司 | 高压共轨泵用的柱塞组件 |
| RU191730U1 (ru) * | 2019-06-06 | 2019-08-19 | Общество с ограниченной ответственностью Управляющая компания "Алтайский завод прецизионных изделий" | Топливный насос высокого давления |
| DE102019212743A1 (de) * | 2019-08-26 | 2021-03-04 | Robert Bosch Gmbh | Fahrzeugbremsanlagen-Radialkolbenpumpe |
| CN115807748A (zh) * | 2022-12-07 | 2023-03-17 | 北京天玛智控科技股份有限公司 | 柱塞滑靴组件和多边形轮盘驱动的径向柱塞泵 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19705205A1 (de) * | 1997-02-12 | 1998-08-13 | Bosch Gmbh Robert | Kolbenpumpe |
| DE19814506A1 (de) * | 1998-04-01 | 1999-10-14 | Bosch Gmbh Robert | Radialkolbenpumpe zur Kraftstoffhochdruckversorgung |
| JP2003049745A (ja) * | 2001-05-29 | 2003-02-21 | Denso Corp | 燃料噴射ポンプ |
| JP2003074439A (ja) * | 2001-06-19 | 2003-03-12 | Denso Corp | 燃料噴射ポンプ |
-
2002
- 2002-10-11 DE DE2002147645 patent/DE10247645A1/de not_active Withdrawn
-
2003
- 2003-03-18 DE DE50304981T patent/DE50304981D1/de not_active Expired - Lifetime
- 2003-03-18 EP EP03722224A patent/EP1556606B1/de not_active Expired - Lifetime
- 2003-03-18 WO PCT/DE2003/000879 patent/WO2004036031A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2004036031A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1556606B1 (de) | 2006-09-06 |
| DE50304981D1 (de) | 2006-10-19 |
| DE10247645A1 (de) | 2004-04-22 |
| WO2004036031A1 (de) | 2004-04-29 |
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