EP2734733A2 - Zahnradpumpe und verfahren zum betreiben einer zahnradpumpe - Google Patents
Zahnradpumpe und verfahren zum betreiben einer zahnradpumpeInfo
- Publication number
- EP2734733A2 EP2734733A2 EP12726631.0A EP12726631A EP2734733A2 EP 2734733 A2 EP2734733 A2 EP 2734733A2 EP 12726631 A EP12726631 A EP 12726631A EP 2734733 A2 EP2734733 A2 EP 2734733A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gear pump
- pressure
- gear
- pump
- fluid
- 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
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 description 12
- 238000002485 combustion reaction Methods 0.000 description 11
- 210000003734 kidney Anatomy 0.000 description 4
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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
- 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
- F02M37/06—Feeding by means of driven pumps mechanically driven
-
- 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
- F02M59/447—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 means specially adapted to limit fuel delivery or to supply excess of fuel temporarily, e.g. for starting of the engine
-
- 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
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
-
- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
- F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
-
- 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
- F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
-
- 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
- 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
- F04C2210/00—Fluid
- F04C2210/20—Fluid liquid, i.e. incompressible
- F04C2210/203—Fuel
Definitions
- the present invention relates to a gear pump according to the preamble of claim 1 and a method for operating a gear pump according to the preamble of claim 10.
- gerotor pumps Internal gear pumps, so-called gerotor pumps, are used to deliver
- Used fluids for example, to promote fuel in a fuel injection system of an internal combustion engine.
- the internally toothed ring and the externally toothed gear are mounted eccentrically to one another.
- the inflow and outflow of the fluid to be delivered takes place via flow channels or via so-called inlet and outlet kidneys, which are arranged in the prior art basically symmetrical to the eccentricity of the bearings.
- An internal gear pump for conveying fuel in an internal combustion engine is described, for example, in DE 100 35 900 A1.
- the local internal gear pump has an internally toothed ring gear and an externally toothed pinion or gear, which interacts with the internally toothed ring gear for generating a pumping action.
- the feed pump comprises a first gear and a second gear. Between the two gears, a delivery chamber is formed.
- the second gear is mounted in its center on a mandrel.
- the first gear is an external gear and forms the rotor, the second gear is a Internal gear, which is entrained in the off-center center of the first gear.
- a fuel supply system of an internal combustion engine and a method for starting an internal combustion engine are described, by means of which a minimum pressure, i. H. a pressure required for the first injection operation at engine startup is determined according to a minimum time for the period between the start of the engine cranking and the release of the first injection event.
- a gear pump for conveying a fluid which has a rotatably mounted externally toothed gear and an internally toothed ring, which are mounted eccentrically to each other, together form a toothing and are in meshing engagement to produce a conveying action, wherein the toothing a plurality is formed by delivery chambers, and wherein a suction-side inlet channel is arranged in a first angular range in which the delivery chambers increase in a rotation of the gear and the toothed ring, and a pressure-side discharge Channel is arranged in a second angular range in which the delivery chambers decrease in the rotation of the gear and the toothed ring, wherein between the inlet channel and the drainage channel, a sealing region is formed, wherein in the sealing region on the side on which the delivery chambers in the Reduce rotation of the gear and the ring gear, an opening is formed.
- a high pressure of approximately 120 bar can be provided for a short time by means of the cost-effective electric gear pump, which has the preprocessing of the fuel as the main function.
- the opening is located in the second angular range, in which there are also the smaller during operation of the gear pump delivery chambers, in which a very high squeezing pressure in the fluid to be delivered, such as diesel fuel, is constructed upon rotation of the ring gear and the gear.
- This high squish pressure is exploited by the configuration according to the invention by the fluid to be delivered is not supplied from the drain passage to the high-pressure pump at start, but is briefly output when starting the engine from the additional opening in the second angular range of the gear pump.
- the opening acts as a squeeze pressure relief opening. It is particularly preferred if in this case the opening is made only very small. As a result, the provision of the short-term high pressure can be advantageously supported.
- the respective arc length of the inlet channel and the outlet channel is shorter than 180 °.
- the sealing region has a first partial region, which is arranged on the side on which the delivery chambers increase as the gear and the toothed ring rotate.
- the sealing region has a second partial region, which is arranged on the side which reduce the delivery chambers during rotation of the gear and the ring gear.
- the opening is arranged substantially in the middle of the second subregion of the sealing region.
- the delivery chambers are sealed in the second angular range radially by the toothing between the gear and the toothed ring via a line contact.
- the gear pump is an internal gear pump in which the internally toothed ring acts as a rotor.
- the gear pump is attachable to a high-pressure pump.
- a method of operating a gear pump for delivering a fluid in a high pressure injection system particularly in a common rail system, wherein a first hydraulic path leading from a pressure side drain passage of the gear pump via a high pressure pump to a high pressure accumulator and a second hydraulic path, which leads from a pressure-side Quetschdruckentlas- opening of the gear pump via a suction valve and a pump cylinder of the high-pressure pump to the high-pressure accumulator are provided, wherein in a standard operating mode in which the gear pump, the function of advancing the fluid to the High-pressure pump, the fluid is supplied to the high-pressure accumulator via the first hydraulic path and the second hydraulic path, and wherein in a start mode for short-term construction of a high pressure in the high-pressure accumulator, the fluid only via the second hydraulisc hen path is supplied to the high-pressure accumulator, wherein at the same time the exiting via the first hydraulic path from the gear pump fluid quantity is supplied via
- FIG. 2 shows a schematic representation of the arrangement of the inlet channel and the outlet channel of the electrical gear pump according to the prior art illustrated in FIG. 1;
- FIG. 3 shows a schematic representation of the arrangement of the inlet channel and the outlet channel according to an embodiment
- FIG. 4 is a hydraulic schematic for a high pressure injection system according to one embodiment.
- Fig. 1 shows a schematic representation of an electric gear pump 1 according to the prior art.
- the gear pump 1 comprises a pair of gears, which consists of an internally toothed ring gear 2, which acts as a rotor, and an externally toothed gear 3 or pinion.
- the externally toothed gear 3 is arranged eccentrically to the internal toothed ring 2 rotatably mounted on a bearing pin 4. If the externally toothed gear 3 is set in a rotational movement, then the external toothing of the externally toothed gear 3 meshes in the internal toothing of the toothed ring 2 and generates a delivery volume flow of the fluid in which the toothing is running.
- the direction of rotation of the internal toothed ring 2, which acts as a rotor, is indicated by the arrow marked with the reference numeral 5, here in the counterclockwise direction.
- the internally toothed ring gear 2 and the externally toothed gear 3 are slidably mounted and have a respective bearing clearance.
- a plurality of delivery chambers 10 are formed between the toothed ring 2 and the gear 3.
- the electric gear pump 1 also has a suction-side inlet channel 7 for introducing the fluid into the interior of the gear pump 1 and a pressure-side outlet channel 8 for discharging the fluid to be delivered from the gear pump 1 out, as indicated by the dashed lines.
- the inlet channel 7 and the outlet channel 8 are here arranged offset by 180 ° to one another and are designed as inlet kidneys or drainage kidneys (see FIG. 2).
- the inlet channel 7 and the outlet channel 8 are formed in the housing or the cover of the gear pump 1, not shown here, whose length extends due to an internal seal between the suction and sealing side respectively over an angle of slightly below 180 °.
- the inlet channel 7 is located in a first angle range 9, in which the delivery chambers 10 at
- the outlet channel 8 is, however, in a second angular range 1 1, in which the delivery chambers 10 shrink in rotation of the toothed ring 2 and the gear 3 in the direction of rotation.
- Fig. 2 is a schematic representation of the arrangement of the inlet channel 7 and the outlet channel 8 of the illustrated in Fig. 1 electric gear pump 1 according to the prior art.
- the inlet channel 7 and the outlet channel 8 are each formed as a drainage kidney and each have a length over an angular range of less than 180 °, so that a sealing region 12 between the suction side and the pressure side of the electric gear pump 1 and between the inlet channel 7 and the Drain channel 8 is created.
- the sealing region 12 comprises a first portion 19, which corresponds to the first angle ⁇ , which is arranged on the side on which the delivery chambers 10 increase in the rotation of the gear 3 and the ring gear 2, and a second portion 20, which the second angle a 2 corresponds, which on the side is arranged, on which the delivery chambers 10 shrink during the rotation of the gear 3 and the ring gear 2.
- FIG. 3 is a schematic representation of the arrangement of the inlet channel 7 and the outlet channel 8 according to one embodiment. As can be seen here, is in
- an additional opening 13 is provided approximately in the middle of the partial region 20.
- a moving over delivery chamber 10 (see Fig. 1) is completely enclosed over a certain angle of rotation. Since a delivery chamber 10 (see FIG.
- a hydraulic schematic for a high pressure injection system 14 is shown.
- fuel 16 such as diesel
- fuel tank 15 promoted by an electric gear pump 1 and fed via a high-pressure pump 17 to a high-pressure accumulator 18, as will be explained later.
- the fuel 16 conveyed by the gear pump 1 is supplied to the high-pressure accumulator 18 both via the first path Qi and via the second path Q 2 .
- the delivery amount supplied to the high-pressure accumulator 18 via the second path Q 2 is small in comparison with the delivery amount supplied via the first path Qi and does not decrease even at higher rotational speeds more clearly, as can be seen from the graphic on the lower left side of the figure.
- the high-pressure pump 17 pressurizes the conveyed fuel 16 with high pressure and then leads it to the high-pressure accumulator 18, from where it is injected into the combustion chamber of an internal combustion engine via injection valves not shown here.
- ISS operating case
- a cost-effective electric gear pump 1 can be used for the short-term generation of a high pressure when starting an internal combustion engine, in particular for a common rail system.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201110079671 DE102011079671A1 (de) | 2011-07-22 | 2011-07-22 | Zahnradpumpe und Verfahren zum Betreiben einer Zahnradpumpe |
| PCT/EP2012/061126 WO2013013879A2 (de) | 2011-07-22 | 2012-06-12 | Zahnradpumpe und verfahren zum betreiben einer zahnradpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2734733A2 true EP2734733A2 (de) | 2014-05-28 |
| EP2734733B1 EP2734733B1 (de) | 2018-08-08 |
Family
ID=46245591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12726631.0A Not-in-force EP2734733B1 (de) | 2011-07-22 | 2012-06-12 | Zahnradpumpe und verfahren zum betreiben einer zahnradpumpe |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP2734733B1 (de) |
| JP (1) | JP5759628B2 (de) |
| KR (1) | KR20140040242A (de) |
| CN (1) | CN103688056B (de) |
| BR (1) | BR112014001366A2 (de) |
| DE (1) | DE102011079671A1 (de) |
| WO (1) | WO2013013879A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119801765B (zh) * | 2024-12-06 | 2025-11-18 | 潍柴动力股份有限公司 | 一种单体泵共轨快速建压方法、装置及机动车辆 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2720406A1 (de) * | 1977-05-06 | 1978-11-09 | Audi Nsu Auto Union Ag | Inneneingriffszahnradpumpe vorzugsweise fuer brennkraftmaschinen in antriebsaggregaten von kraftfahrzeugen |
| DE4303328C2 (de) * | 1993-02-05 | 2001-11-29 | Mannesmann Vdo Ag | Gerotorpumpe zum Fördern von Fluid, insbesondere als Kraftstoff-Förderaggregat für Kraftfahrzeuge |
| JPH0914152A (ja) * | 1995-06-30 | 1997-01-14 | Jatco Corp | 内接歯車式回転ポンプ |
| JP3424409B2 (ja) * | 1995-10-30 | 2003-07-07 | アイシン精機株式会社 | オイルポンプ装置 |
| US6102684A (en) * | 1998-09-14 | 2000-08-15 | Walbro Corporation | Cavitation noise abatement in a positive displacement fuel pump |
| DE10035900A1 (de) | 2000-07-21 | 2002-01-31 | Bosch Gmbh Robert | Innenzahnradpumpe |
| US6739850B2 (en) * | 2001-10-25 | 2004-05-25 | Kyosan Denki Co., Ltd. | Motor-type fuel pump for vehicle |
| DE10350632A1 (de) * | 2003-10-29 | 2005-06-16 | Gkn Sinter Metals Gmbh | Doppel- oder Mehrfachpumpe |
| DE102006007554A1 (de) | 2006-02-16 | 2007-08-23 | Hydraulik-Ring Gmbh | Förderpumpe, insbesondere für Harnstoffwasserlösung als Abgasnachbehandlungsmedium |
| DE102007058231A1 (de) | 2007-12-04 | 2009-06-10 | Robert Bosch Gmbh | Verfahren zum Starten einer Brennkraftmaschine |
-
2011
- 2011-07-22 DE DE201110079671 patent/DE102011079671A1/de not_active Withdrawn
-
2012
- 2012-06-12 CN CN201280036019.0A patent/CN103688056B/zh not_active Expired - Fee Related
- 2012-06-12 WO PCT/EP2012/061126 patent/WO2013013879A2/de not_active Ceased
- 2012-06-12 KR KR1020147001346A patent/KR20140040242A/ko not_active Withdrawn
- 2012-06-12 JP JP2014520574A patent/JP5759628B2/ja not_active Expired - Fee Related
- 2012-06-12 BR BR112014001366A patent/BR112014001366A2/pt not_active Application Discontinuation
- 2012-06-12 EP EP12726631.0A patent/EP2734733B1/de not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011079671A1 (de) | 2013-01-24 |
| EP2734733B1 (de) | 2018-08-08 |
| BR112014001366A2 (pt) | 2017-02-21 |
| KR20140040242A (ko) | 2014-04-02 |
| CN103688056A (zh) | 2014-03-26 |
| WO2013013879A2 (de) | 2013-01-31 |
| JP5759628B2 (ja) | 2015-08-05 |
| WO2013013879A3 (de) | 2013-08-22 |
| JP2014521014A (ja) | 2014-08-25 |
| CN103688056B (zh) | 2016-08-24 |
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