EP1314882A1 - Hochdruckpumpe - Google Patents
Hochdruckpumpe Download PDFInfo
- Publication number
- EP1314882A1 EP1314882A1 EP02020978A EP02020978A EP1314882A1 EP 1314882 A1 EP1314882 A1 EP 1314882A1 EP 02020978 A EP02020978 A EP 02020978A EP 02020978 A EP02020978 A EP 02020978A EP 1314882 A1 EP1314882 A1 EP 1314882A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- pressure pump
- section
- drive shaft
- recess
- 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 claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 11
- 239000007924 injection Substances 0.000 claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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
- 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
- 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
- F04B1/0408—Pistons
-
- 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
Definitions
- the invention relates to a high pressure pump for fuel supply of fuel injection systems for internal combustion engines, in particular of common rail injection systems, according to in the preamble of claim 1 closer defined type.
- a generic high-pressure pump is from the MTZ 58 (1997) S. 572 and DE 197 56 087 A1.
- the principal Mode of action of this high-pressure pump is for the common-rail principle working internal combustion engines very well suited
- the special construction ensures the same not a perfect function in all operating states, so that it is quite damaging the high-pressure pump and possibly even damage to the Internal combustion engine can come.
- a high-pressure pump for fuel supply of fuel injection systems for internal combustion engines which provide a has very high reliability in operation and the Advantages of the principle mode of action generic Maintains high pressure pumps.
- the high pressure pump 1 has a drive shaft 2, the Drive offset by three in the present case by 120 ° to each other Piston 3 is provided. Since the high-pressure pump 1 is symmetrical is executed, the following applies to one of the three pistons 3 explained also for the other two pistons 3. In this context, it is of course possible on the circumference of the drive shaft 2 a larger or smaller Number of piston 3 to install.
- the pistons 3 are provided for the compression of fuel, the subsequently a high-pressure accumulator, not shown is supplied.
- the high pressure pump 1 is used for fuel supply a fuel injection system, not shown for an internal combustion engine, also not shown, especially for a common rail injection system, which also is described in DE 197 56 087 A1.
- the drive shaft 2 for example, by a crank mechanism the internal combustion engine are driven. Alternatively it is also, a connection of the drive shaft 2 directly with a Camshaft of the internal combustion engine or a perfect separate drive of the same conceivable.
- the drive shaft 2 with the Piston 3 In the area in which the drive shaft 2 with the Piston 3 is in operative connection, it is eccentric, i.e. it has an eccentric shaft section 2a on.
- the shaft portion 2a is at its periphery with a so-called polygon ring 4 provided in the present case has three flats 5, which directly with the piston 3 in contact.
- the polygon ring 4 has a the number of pistons 3 corresponding number of flats 5 on.
- the polygon ring 4 is opposite the drive shaft. 2 rotatable and brings in this way one in the radial direction acting force on the piston 3, thereby successively to perform an oscillating movement.
- each piston plates 6 which have a recess 7 in which a first section 8 of the piston 3 is mounted.
- the piston plates 6 lead the Polygon ring 4 in its movement.
- Each piston 3 is the further associated with a spring element 9, the provision the respective piston 3 is used.
- the piston 3 has in addition to the with the polygon ring 4 in connection standing section 8 more piston sections 10, 11th and 12 on. This sets the largest diameter of the piston 3, that of the piston portion 12, the delivery volume the high-pressure pump 1 at a certain speed and a certain stroke.
- the high pressure pump 1 then works optimally when each piston 3 is exactly perpendicular to the associated piston plate 6 and not tilted. Due to the free mobility of the polygon ring 4 in operation, however, such a tilt can quite occur and is not always prevent how this also Fig. 2 shows. For this reason, the in the Recess 7 mounted portion 8 of the piston 3 and thus also the recess 7 itself a larger diameter than the subsequent section 10 of the piston 3.
- the diameter of section 8 depends on the loads from which the high pressure pump 1 exposed is. Furthermore, created by this enlarged diameter of section 8 a circumferential projection 13, on which a bracket 14 is supported as an assembly aid for the Piston plate 6 with the piston 3 is used and not in Fig. 1 is shown.
- the recess 7 facing portion 8 of the piston 3 is provided with a radius 15, in general 10 to 50 times the diameter of section 8 is so much smaller than before. To this Way is achieved that in case of a possible tilting the Piston 3 against the polygon ring 4 of the piston 3 faster returns to its basic position, since the restoring force this is greater. In general, the radius should be less being 45 times the diameter of section 8, to achieve this effect. In Fig. 2, the radius is 15th however, shown greatly enlarged.
- the diameter of the piston 3 is in a range between 8 - 10 mm and the radius is 15 about 200 mm, so that the radius 15 about 20 to 25 times the diameter of the piston 3 is, which is the practice very well suited. If the diameter of section 8 is larger, consequently, the radius 15 is larger.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
- Fig. 1
- einen Teil der erfindungsgemäßen Hochdruckpumpe; und
- Fig. 2
- eine vergrößerte Darstellung der Hochdruckpumpe aus Fig. 1.
Claims (6)
- Hochdruckpumpe zur Kraftstoffversorgung von Kraftstoffeinspritzsystemen für Brennkraftmaschinen, insbesondere von Common-Rail-Einspritzsystemen, mit einer Antriebswelle und mit wenigstens zwei von der Antriebswelle bewegbaren Kolben zur Verdichtung des Kraftstoffes, wobei zwischen der Antriebswelle und den wenigstens zwei Kolben jeweils eine Kolbenplatte angeordnet ist, die eine Aussparung aufweist, in der ein Abschnitt des Kolbens gelagert ist,
dadurch gekennzeichnet, dass
die Aussparung (7) und der der Aussparung (7) zugewandte Abschnitt (8) des Kolbens (3) einen größeren Querschnitt aufweisen als ein nachfolgender, von der Kolbenplatte (6) abgewandter Abschnitt (10) des Kolbens (3). - Hochdruckpumpe nach Anspruch 1,
dadurch gekennzeichnet, dass
der der Aussparung (7) zugewandte Abschnitt (8) des Kolbens (3) an seiner der Kolbenplatte (6) zugewandten Seite einen Radius (15) aufweist, der das 10- bis 50-fache des Durchmessers des Abschnittes (8) beträgt. - Hochdruckpumpe zur Kraftstoffversorgung von Kraftstoffeinspritzsystemen für Brennkraftmaschinen, insbesondere von Common-Rail-Einspritzsystemen, mit einer Antriebswelle und mit wenigstens zwei von der Antriebswelle bewegbaren Kolben zur Verdichtung des Kraftstoffes, wobei zwischen der Antriebswelle und den wenigstens zwei Kolben jeweils eine Kolbenplatte angeordnet ist, die eine Aussparung aufweist, in der ein Abschnitt des Kolbens gelagert ist,
dadurch gekennzeichnet, dass
der der Aussparung (7) zugewandte Abschnitt (8) des Kolbens (3) an seiner der Kolbenplatte (6) zugewandten Seite einen Radius (15) aufweist, der das 10- bis 50-fache des Durchmessers des Abschnittes (8) beträgt. - Hochdruckpumpe nach Anspruch 1,
dadurch gekennzeichnet, dass
die Aussparung (7) und der der Aussparung (7) zugewandte Abschnitt (8) des Kolbens (3) einen größeren Querschnitt aufweisen als ein nachfolgender, von der Kolbenplatte (6) abgewandter Abschnitt (10) des Kolbens (3). - Hochdruckpumpe nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass
die Antriebswelle (2) in demjenigen Bereich, in dem sie mit den Kolben (3) in Wirkverbindung steht, exzentrisch ausgebildet ist. - Hochdruckpumpe nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass
die Antriebswelle (2) in demjenigen Bereich, in dem sie mit den Kolben (3) in Wirkverbindung steht, mit einem Ring (4) versehen ist, der eine der Anzahl der Kolben (3) entsprechende Anzahl an Abflachungen (5) aufweist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10157375 | 2001-11-22 | ||
| DE2001157375 DE10157375A1 (de) | 2001-11-22 | 2001-11-22 | Hochdruckpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1314882A1 true EP1314882A1 (de) | 2003-05-28 |
| EP1314882B1 EP1314882B1 (de) | 2008-04-23 |
Family
ID=7706632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02020978A Expired - Lifetime EP1314882B1 (de) | 2001-11-22 | 2002-09-20 | Hochdruckpumpe |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1314882B1 (de) |
| DE (2) | DE10157375A1 (de) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19756087A1 (de) | 1997-12-17 | 1999-06-24 | Bosch Gmbh Robert | Hochdruckpumpe zur Kraftstoffversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen |
| WO1999037916A1 (de) * | 1998-01-23 | 1999-07-29 | Robert Bosch Gmbh | Radialkolbenpumpe zur krafstoffhochdruckerzeugung |
| WO1999045271A1 (de) * | 1998-03-05 | 1999-09-10 | Robert Bosch Gmbh | Radialkolbenpumpe zur kraftstoffhochdruckerzeugung |
| DE19943160A1 (de) * | 1998-09-10 | 2000-03-16 | Denso Corp | Kraftstoffeinspritzpumpe |
| US6077056A (en) * | 1997-02-12 | 2000-06-20 | Robert Bosch Gmbh | Reciprocating pump |
| DE10018708A1 (de) * | 1999-04-16 | 2000-11-02 | Denso Corp | Kraftstoffeinspritzpumpe |
| DE10044997A1 (de) * | 2000-09-11 | 2002-03-21 | Schaeffler Waelzlager Ohg | Druckplatte einer Radialkolbenpumpe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10150351A1 (de) * | 2001-10-15 | 2003-05-08 | Bosch Gmbh Robert | Pumpenelement und Kolbenpumpe zur Kraftstoffhochdruckerzeugung |
-
2001
- 2001-11-22 DE DE2001157375 patent/DE10157375A1/de not_active Withdrawn
-
2002
- 2002-09-20 EP EP02020978A patent/EP1314882B1/de not_active Expired - Lifetime
- 2002-09-20 DE DE50212139T patent/DE50212139D1/de not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6077056A (en) * | 1997-02-12 | 2000-06-20 | Robert Bosch Gmbh | Reciprocating pump |
| DE19756087A1 (de) | 1997-12-17 | 1999-06-24 | Bosch Gmbh Robert | Hochdruckpumpe zur Kraftstoffversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen |
| WO1999037916A1 (de) * | 1998-01-23 | 1999-07-29 | Robert Bosch Gmbh | Radialkolbenpumpe zur krafstoffhochdruckerzeugung |
| WO1999045271A1 (de) * | 1998-03-05 | 1999-09-10 | Robert Bosch Gmbh | Radialkolbenpumpe zur kraftstoffhochdruckerzeugung |
| DE19943160A1 (de) * | 1998-09-10 | 2000-03-16 | Denso Corp | Kraftstoffeinspritzpumpe |
| DE10018708A1 (de) * | 1999-04-16 | 2000-11-02 | Denso Corp | Kraftstoffeinspritzpumpe |
| DE10044997A1 (de) * | 2000-09-11 | 2002-03-21 | Schaeffler Waelzlager Ohg | Druckplatte einer Radialkolbenpumpe |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1314882B1 (de) | 2008-04-23 |
| DE10157375A1 (de) | 2003-06-05 |
| DE50212139D1 (de) | 2008-06-05 |
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