DE10243148A1 - Radial piston pump unit used in high-pressure injection systems for internal combustion engines, especially common rail injection systems, comprises a fuel-conveying pump with a spring-loaded low-pressure pump piston - Google Patents
Radial piston pump unit used in high-pressure injection systems for internal combustion engines, especially common rail injection systems, comprises a fuel-conveying pump with a spring-loaded low-pressure pump piston Download PDFInfo
- Publication number
- DE10243148A1 DE10243148A1 DE2002143148 DE10243148A DE10243148A1 DE 10243148 A1 DE10243148 A1 DE 10243148A1 DE 2002143148 DE2002143148 DE 2002143148 DE 10243148 A DE10243148 A DE 10243148A DE 10243148 A1 DE10243148 A1 DE 10243148A1
- Authority
- DE
- Germany
- Prior art keywords
- pump
- piston
- radial
- fuel
- pressure
- 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- Withdrawn
Links
- 238000002347 injection Methods 0.000 title claims abstract description 9
- 239000007924 injection Substances 0.000 title claims abstract description 9
- 238000002485 combustion reaction Methods 0.000 title description 3
- 239000000446 fuel Substances 0.000 claims abstract description 41
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
- 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
- F04B1/0413—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
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Radialkolbenpumpeneinheit für Hochdruckeinspritzsysteme mit einem Pumpengehäuse (1), in dem eine Antriebswelle (3) mit einem Exenterabschnitt (4) gelagert ist, auf dem ein Hubring (5) sitzt, der eine Hochdruckradialkolbenpumpe mit mindestens einem in radialer Richtung zur Antriebsachse (71) bewegbaren federbelasteten Hochdruckpumpenkolben (43) bewegt und einer Kraftstoffvorförderpumpe, die von der Antriebswelle (3) angetrieben wird, wobei die Kraftstoffvorförderpumpe als Radialkolbenpumpe mit mindestens einem in radialer Richtung zur Antriebsachse (71) bewegbaren, federbelasteten Niederdruckpumpenkolben (26) ausgebildet ist.Radial piston pump unit for high pressure injection systems with a pump housing (1) in which a drive shaft (3) with an eccentric section (4) is mounted, on which a cam ring (5) is seated, which can move a high pressure radial piston pump with at least one in the radial direction to the drive axis (71) spring-loaded high-pressure pump piston (43) and a fuel feed pump which is driven by the drive shaft (3), the fuel feed pump being designed as a radial piston pump with at least one spring-loaded low-pressure pump piston (26) which can be moved in the radial direction to the drive axis (71).
Description
Die Erfindung betrifft eine Radialkolbenpumpeneinheit zur Kraftstoffhochdruckerzeugung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen, insbesondere bei einem Common-Rail-Einspritzsystem.The invention relates to a radial piston pump unit for generating high-pressure fuel in fuel injection systems of internal combustion engines, especially in a common rail injection system.
Aus der
Einer derartigen Radialkolbenpumpe ist üblicherweise eine Kraftstoffvorförderpumpe vorgeschaltet, die den Kraftstoff aus dem Kraftstofftank der Hochdruckpumpe zuführt. Die Kraftstoffvorförderpumpe wird in der Regel durch einen Elektromotor oder über die Nockenwelle angetrieben. Bei dem Nockenwellenantrieb kann die Vorförderpumpe direkt auf der Nockenwelle sitzen oder über einen Riemen angetrieben werden. Aufgrund der begrenzten Platzverhältnisse im Motorraum ist es notwendig, die Kraftstoffhochdruckpumpe sowie die Vorförderpumpe möglichst kompakt zu bauen.Such a radial piston pump is common a fuel feed pump upstream, which takes the fuel from the fuel tank to the high pressure pump supplies. The fuel feed pump is usually driven by an electric motor or via the camshaft. With the camshaft drive, the pre-feed pump can be mounted directly on the camshaft sit or over to be driven by a belt. Due to the limited space in the engine compartment it is necessary to use the high pressure fuel pump as well the pre-feed pump preferably compact to build.
Die Aufgabe der Erfindung ist es, eine Radialkolbenpumpeneinheit für Hochdruckeinspritzsysteme bereitzustellen, die ein kompakte Bauweise aufweist.The object of the invention is a radial piston pump unit for To provide high pressure injection systems that are compact in design having.
Die Aufgabe wird gelöst durch die Merkmale des unabhängigen Patentanspruchs. Vorteilhafte Ausgestaltung der Erfindung sind in den Unteransprüchen gekennzeichnet.The task is solved by the characteristics of the independent Claim. Advantageous embodiments of the invention are shown in the subclaims characterized.
Die Erfindung zeichnet sich dadurch aus, dass die Radialkolbenpumpeneinheit eine Kraftstoffvorförderpumpe aufweist, die als Radialkolbenpumpe, mit mindestens einem in radialer Richtung zur Antriebsachse bewegbaren, federbelasteten Pumpenkolben, aufweist. Der Vorteil dieser Anordnung ist eine äußerst kompakte Bauform der Radialkolbenpumpeneinheit, da die bei den bisherigen Lösungen notwendige Steuerscheibe, die dazu dient den Kraftstoff gleichmäßig auf die am Umfang verteilten Saugventile zu verteilen entfällt. Ein weiterer Vorteil, der sich aus der kompakten Anordnung von Hochdruckpumpe und Kraftstoffvorförderpumpe ergibt, ist der, dass die Leitung von der Kraftstoffvorförderpumpe zum Saugventil der Hochdruckpumpe auf ein Minimum reduziert werden kann.The invention is characterized by this from that the radial piston pump unit is a fuel feed pump has as a radial piston pump, with at least one in the radial Spring-loaded pump piston movable in the direction of the drive axis, having. The advantage of this arrangement is an extremely compact design Radial piston pump unit, as the one necessary with the previous solutions Control disc that serves the fuel evenly There is no need to distribute the suction valves distributed around the circumference. On Another advantage resulting from the compact arrangement of the high pressure pump and fuel feed pump is that the line from the fuel feed pump to Suction valve of the high pressure pump can be reduced to a minimum.
Durch die Radialkolbenbauweise der Kraftstoffvorförderpumpe ergibt sich ein besonders günstiges Laufverhalten und ein besonders guter Startlauf, insbesondere bei niedrigen Drehzahlen. Im Gegensatz zu Flügelzellenpumpen, die erst bei hohen Drehzahlen eine gute Abdichtung zwischen den Flügeln und dem Pumpengehäuse gewährleisten, zeichnet sich die Kolbenpumpe durch geringe Leckageverluste bereits bei niedrigen Drehzahlen aus.Due to the radial piston design of the fuel feed pump the result is a particularly favorable one Running behavior and a particularly good start, especially at low speeds. In contrast to vane pumps, which are only available at high speeds a good seal between the wings and the pump housing guarantee, the piston pump is already characterized by low leakage losses at low speeds.
Zusätzlich ist durch die Radialbauweise der Vorförderpumpe eine kostengünstige Herstellung möglich, da die Einzelteile der Pumpe im Wesentlichen aus Drehteilen bestehen.In addition, due to the radial design the pre-feed pump an inexpensive Production possible, since the individual parts of the pump essentially consist of turned parts.
Eine bevorzugte Ausgestaltung der Erfindung sieht vor, dass die Achsen der Pumpenkolben der Hochdruckradialkolbenpumpe und der Kraftstoffvorförderpumpe, in einer gemeinsamen Radialebene zur Antriebsachse angeordnet sind. Hierdurch lässt sich die Axiallänge der Pumpe weiter reduzieren. Ein weiterer Vorteil der sich durch die Anordnung von Hochdruckpumpe und Kraftstoffvorförderpumpe auf einer gemeinsamen Radialebene ergibt ist der, dass die Kraftstoffvorförderpumpe von einem gemeinsamen Exzenterring angetrieben werden kann, wodurch sich der Konstruktions- und Fertigungsaufwand der Pumpe verringert.A preferred embodiment of the The invention provides that the axes of the pump pistons of the high-pressure radial piston pump and the fuel feed pump, are arranged in a common radial plane to the drive axis. This allows the axial length reduce the pump further. Another advantage of getting through the arrangement of the high pressure pump and fuel feed pump on a common radial plane is that of the fuel feed pump can be driven by a common eccentric ring, whereby the design and manufacturing costs of the pump are reduced.
Ausführungsbeispiele der Erfindung werden im Folgenden anhand der schematischen Zeichnungen erläutert. Es zeigen:Embodiments of the invention are explained below using the schematic drawings. It demonstrate:
Die Radialkolbenpumpeneinheit besteht
aus einem Pumpengehäuse
Bei jeder vollen Umdrehung der Antriebswelle
Vorzugsweise weist die Kraftstoffvorförderpumpe
einen modularen Aufbau auf. Durch den modularen Aufbau lässt sich
eine besonders kostengünstige
Radialkolbenpumpeneinheit realisieren. Das Pumpengehäuse
Anhand der
Der Kraftstoff tritt zunächst über den
Kraftstoffzulauf
Während
des Saughubs des Hochdruckpumpenkolbens
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2002143148 DE10243148A1 (en) | 2002-09-17 | 2002-09-17 | Radial piston pump unit used in high-pressure injection systems for internal combustion engines, especially common rail injection systems, comprises a fuel-conveying pump with a spring-loaded low-pressure pump piston |
| PCT/DE2003/002940 WO2004027263A1 (en) | 2002-09-17 | 2003-09-04 | Radial piston pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2002143148 DE10243148A1 (en) | 2002-09-17 | 2002-09-17 | Radial piston pump unit used in high-pressure injection systems for internal combustion engines, especially common rail injection systems, comprises a fuel-conveying pump with a spring-loaded low-pressure pump piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE10243148A1 true DE10243148A1 (en) | 2004-03-25 |
Family
ID=31896114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2002143148 Withdrawn DE10243148A1 (en) | 2002-09-17 | 2002-09-17 | Radial piston pump unit used in high-pressure injection systems for internal combustion engines, especially common rail injection systems, comprises a fuel-conveying pump with a spring-loaded low-pressure pump piston |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE10243148A1 (en) |
| WO (1) | WO2004027263A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007116048A1 (en) * | 2006-04-11 | 2007-10-18 | Continental Automotive Gmbh | Radial piston pump for supplying fuel at high pressure to an internal combustion engine |
| WO2009053178A1 (en) * | 2007-10-24 | 2009-04-30 | Robert Bosch Gmbh | High-pressure fuel pump |
| WO2015071405A1 (en) * | 2013-11-18 | 2015-05-21 | Robert Bosch Gmbh | Fuel injection pump for an internal combustion engine |
| DE102014005143A1 (en) * | 2014-04-07 | 2015-10-08 | Tankol Gmbh Gesellschaft Für Fluidtechnik | Positive displacement pump with at least two different delivery rates at input speed |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005059831B3 (en) * | 2005-12-14 | 2007-06-21 | Siemens Ag | high pressure pump |
| DE102008057089A1 (en) | 2008-11-13 | 2010-05-20 | Continental Mechanical Components Germany Gmbh | Pump unit for a high-pressure pump |
| DE102010031701B4 (en) | 2010-07-21 | 2013-10-10 | Continental Automotive Gmbh | Fuel injection system with electromechanical converter and summing gear |
| DE102012224308A1 (en) * | 2012-12-21 | 2014-06-26 | Continental Automotive Gmbh | high pressure pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2505400A1 (en) * | 1975-02-08 | 1976-08-19 | Hilma Gmbh Maschf | RADIAL PISTON PUMP |
| DE2646583A1 (en) * | 1976-10-15 | 1978-04-20 | Bosch Gmbh Robert | Self priming pump for hydraulic braking systems - is located in line with free piston pump having synchronised stroke and sharing common valves |
| DE4401074A1 (en) * | 1994-01-15 | 1995-07-20 | Elasis Sistema Ricerca Fiat | IC engine fuel pump system |
| DE19802043A1 (en) * | 1997-11-21 | 1999-05-27 | Itt Mfg Enterprises Inc | Piston pump with at least two pump cylinders located in pump housing |
| DE19848035A1 (en) * | 1998-10-17 | 2000-04-20 | Bosch Gmbh Robert | Radial piston pump for high fuel pressure in IC engines with common-rail injection system has suction valve closure spring supported on pump piston and contained in long piston bore |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4126640B4 (en) * | 1991-08-12 | 2005-06-16 | Robert Bosch Gmbh | Pump arrangement with a prefeed pump and a radial piston pump |
| DE19753155A1 (en) * | 1997-11-29 | 1999-06-02 | Mannesmann Rexroth Ag | Fuel supply system for an internal combustion engine and high pressure pump used therein |
| DE19906626A1 (en) * | 1998-10-06 | 2000-04-13 | Mannesmann Rexroth Ag | Pump arrangement with high pressure radial piston pump having eccentric drive has piston unit hydraulically biased against eccentric ring in application position by resulting pressure |
-
2002
- 2002-09-17 DE DE2002143148 patent/DE10243148A1/en not_active Withdrawn
-
2003
- 2003-09-04 WO PCT/DE2003/002940 patent/WO2004027263A1/en not_active Ceased
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2505400A1 (en) * | 1975-02-08 | 1976-08-19 | Hilma Gmbh Maschf | RADIAL PISTON PUMP |
| DE2646583A1 (en) * | 1976-10-15 | 1978-04-20 | Bosch Gmbh Robert | Self priming pump for hydraulic braking systems - is located in line with free piston pump having synchronised stroke and sharing common valves |
| DE4401074A1 (en) * | 1994-01-15 | 1995-07-20 | Elasis Sistema Ricerca Fiat | IC engine fuel pump system |
| DE19802043A1 (en) * | 1997-11-21 | 1999-05-27 | Itt Mfg Enterprises Inc | Piston pump with at least two pump cylinders located in pump housing |
| DE19848035A1 (en) * | 1998-10-17 | 2000-04-20 | Bosch Gmbh Robert | Radial piston pump for high fuel pressure in IC engines with common-rail injection system has suction valve closure spring supported on pump piston and contained in long piston bore |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007116048A1 (en) * | 2006-04-11 | 2007-10-18 | Continental Automotive Gmbh | Radial piston pump for supplying fuel at high pressure to an internal combustion engine |
| US7748966B2 (en) | 2006-04-11 | 2010-07-06 | Continental Automotive Gmbh | Radial piston pump for supplying fuel at high pressure to an internal combustion engine |
| WO2009053178A1 (en) * | 2007-10-24 | 2009-04-30 | Robert Bosch Gmbh | High-pressure fuel pump |
| WO2015071405A1 (en) * | 2013-11-18 | 2015-05-21 | Robert Bosch Gmbh | Fuel injection pump for an internal combustion engine |
| DE102014005143A1 (en) * | 2014-04-07 | 2015-10-08 | Tankol Gmbh Gesellschaft Für Fluidtechnik | Positive displacement pump with at least two different delivery rates at input speed |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004027263A1 (en) | 2004-04-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| 8130 | Withdrawal | ||
| 8165 | Unexamined publication of following application revoked |