EP1260704A1 - Speichereinspritzsystem mit erhöhter Bauteilfestigkeit von hochdruckführenden Komponenten - Google Patents
Speichereinspritzsystem mit erhöhter Bauteilfestigkeit von hochdruckführenden Komponenten Download PDFInfo
- Publication number
- EP1260704A1 EP1260704A1 EP02100463A EP02100463A EP1260704A1 EP 1260704 A1 EP1260704 A1 EP 1260704A1 EP 02100463 A EP02100463 A EP 02100463A EP 02100463 A EP02100463 A EP 02100463A EP 1260704 A1 EP1260704 A1 EP 1260704A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection system
- distributor
- lines
- accumulator
- high 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.)
- Granted
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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
- 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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
Definitions
- the present invention relates to a memory injection system with increased component strength from high pressure Components and in particular a common rail system.
- a memory injection system known from the prior art is shown for example in Figure 6.
- the known Accumulator injection system comprises a high pressure pump 2, which connected to a distributor 17 via a line 15 is. Lines 5 each lead from the distributor piece 17 to one Rail 12. Rail 12 is also connected via lines 14 connected to an injector 4.
- the Rail 12 takes over both the distribution function of the fuel as well Storage function of the fuel. For this there is a in the rail 12 Longitudinal bore formed with a large diameter to a to be able to accommodate a correspondingly large fuel volume. Furthermore, a pressure measuring device is on the distributor piece 17 16 arranged.
- the storage injection system according to the invention is constructed in such a way that there is a high pressure pump, one with the high pressure pump connected distributor and several injectors.
- the injectors are each over with the manifold Lines connected.
- the lines have such a Length on that they have a predetermined fuel storage volume have to the memory function in the memory injection system to fulfill.
- the lines can also be slightly enlarged Diameter than that previously used in accumulator injection systems Have lines used, which means the length of the line be somewhat reduced for a predetermined volume can.
- the distributor piece preferably has a longitudinal bore, whose diameter is equal to the diameter of the lines or whose diameter is only slightly larger than the line diameter is. This ensures that problematic Pressure peaks in the manifold, especially on Intersection area between the longitudinal hole and the transverse holes do not occur.
- a distributor piece with a slightly smaller one Inner diameter than that of the pipes is approx. 15% smaller than the inside diameter of the pipes.
- the longitudinal bore in the distributor arranged eccentrically to the longitudinal axis of the distributor.
- the distributor piece is particularly small and is compact and lightweight.
- the Eccentricity is chosen so that it is still sufficient Wall thickness of the distributor between the longitudinal hole and the outside is there. So the manifold especially with regard to weight optimization be interpreted.
- the lines on the distributor are preferably by means of adapters attached, which screwed into the manifold are. By screwing in the adapter, residual compressive stresses are created at the intersection between the longitudinal bore and introduced the transverse bore of the distributor, so that the strain in the intersection area is further reduced can be.
- the present Invention is between the distributor piece according to the invention and the injectors a second distributor without Storage volume arranged.
- This is the memory injection system practically according to the known structure of Accumulator injection systems with one distributor and one Rail (second manifold) constructed, the inventive Rail, however, does not perform a storage function because the memory function of the lines of the memory injection system be taken over.
- The are particularly preferred two manifolds constructed identically, so the number increased by equal parts in the accumulator injection system can be, which reduces the manufacturing costs to let. Unused connections on the manifolds can be plugged or the like. be closed.
- the present Invention can have an additional storage volume in the High pressure pump or provided directly on the high pressure pump become. This will be for the memory injection system necessary storage volume on the additional in or on the High-pressure pump provided storage volume and the lines divided up. This makes it possible for the lines to be shorter or can be formed with a smaller diameter.
- the component strength of the high pressure bearing Components of the memory injection system increased by using only components with holes with relative small diameter can be used.
- the fuel storage function is completely or partially from the lines accepted.
- increased pressure requirements for storage injection systems and on the other hand the individual components can be produced more cheaply.
- eliminating the Rails further result in a reduced installation space as well reduced weight of the memory injection system. Is too a more flexible arrangement of the distributor in the accumulator injection system possible.
- the lines are thus in a storage injection system to provide a predetermined or the total storage volume for the storage function used in the memory injection system. So they take over Lines (instead of the rails) the storage function in the system, whereby the number of components can be reduced.
- FIGS. 1 to 3 first embodiment of the present invention described.
- the memory injection system 1 comprises according to the first embodiment, a high pressure pump 2, which is connected via a line 6 to a distributor piece 3 is.
- a large number of lines go from the distributor piece 3 5, each with an injector 4 for injection are connected by fuel.
- the distributor 3 takes over only the distribution function for the fuel.
- the Memory function of the memory injection system is in each case taken over by the lines 5, which have a predetermined length and have a predetermined diameter around them To be able to fulfill the storage function.
- the diameter of the lines 5 is not chosen too large, so as not to exceed certain loads on the lines.
- the lines 5 have a diameter from approx. 3.0 mm.
- the distributor 3 is in one shown enlarged sectional view. As shown in Figure 2, is in the distributor 3 along the longitudinal axis of the distributor X-X introduced a longitudinal bore 7.
- the longitudinal bore 7 has the same diameter as the diameter of lines 5 on.
- Cross bores 8 from which are also the same diameter have as the longitudinal bore 7.
- the cross holes 8 are thereby formed as stepped bores and point at their the longitudinal bore 7 opposite end one with a thread 9 provide an area with a larger diameter (cf. Figure 2).
- an adapter 10 is screwed in for fastening a line 5.
- the adapter 10 is in this way in the thread 9 screwed that in the intersection area between the Longitudinal bore 7 and the transverse bore 8 additional compressive residual stresses be introduced so that the component strength can be further increased in this intersection area.
- the adapter 10 is designed such that it is screwed in Condition at the bottom of the threaded stepped Bore 9 rests.
- the lines 5 according to the invention are thus compared with the lines in the state of the art have been trained much longer, around the entire memory function in the memory injection system to be able to take over. This allows the high dynamic Pressure requirements are met and the invention Accumulator injection system has a significantly extended Lifespan. Furthermore, there is a need for extensive post-processing the components of the accumulator injection system be, so that the manufacturing costs are significantly reduced can be.
- FIG. 4 and 5 is a memory injection system according to a second embodiment of the present invention shown.
- the same or functionally the same parts are included the same reference numerals as in the first embodiment designated.
- the second distributor 13 is arranged at the position at which the Technology usually the rail is arranged. It points however, the second distributor piece 13 does not correspond to the rail Storage function, but only serves for distribution of fuel to the individual injectors 4.
- the second distributor piece 13 is similar to that in FIG. 2 shown distributor 3 constructed, with the difference for this purpose, the longitudinal bore 7 of the second distributor piece 13 eccentrically is arranged to the longitudinal axis X-X of the distributor (see Figure 5). This allows in particular the size and thus the weight of the distributor piece 13 can be optimized since the Longitudinal bore 7 relatively close to the outer circumference of the distributor piece 13 can be arranged.
- the diameter of the longitudinal bore 7 corresponds again to the diameter of the lines 5th
- FIG. 4 there are also connecting lines 11 between the second distributor piece 13 and the injectors 4.
- These connecting lines 11 are the same as that Lines 5 constructed and have a length of about 300 mm on. Part of the memory function of the memory injection system also taken over by these lines 11 become. It should be noted, however, that the injectors 4 are as possible should be arranged close to the distributor piece 13. However, 11 can be added by longer connecting lines Degrees of freedom for a more variable arrangement of the individual components can be obtained.
- the present invention relates to a memory injection system with a high pressure pump 2, one with the high pressure pump 2 connected distributor 3 and several injectors 4.
- the injectors 4 are with the distributor piece 3 each connected via lines 5.
- the lines 5 have a such countries that they have a predetermined fuel storage volume have and thus the memory function in the memory injection system can take over. This allows for Rail used in the prior art can be dispensed with.
Abstract
Description
Claims (9)
- Speichereinspritzsystem umfassend eine Hochdruckpumpe (2), ein mit der Hochdruckpumpe (2) verbundenes Verteilerstück (3) und mehrere Injektoren (4), die jeweils mit dem Verteilerstück (3) über Leitungen (5) verbunden sind, wobei die Leitungen (5) eine derartige Länge aufweisen, dass sie ein vorbestimmtes Kraftstoffspeichervolumen haben, um die Speicherfunktion im Speichereinspritzsystem zu übernehmen.
- Speichereinspritzsystem nach Anspruch 1, dadurch gekennzeichnet, dass das Verteilerstück (3) eine Längsbohrung (7) aufweist, deren Durchmesser dem Durchmesser der Leitungen (5) entspricht oder deren Durchmesser nur geringfügig größer als der Durchmesser der Leitungen (5) ist.
- Speichereinspritzsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Längsbohrung (7) im Verteilerstück (3) exzentrisch zu einer Verteilerstücklängsachse (X-X) angeordnet ist.
- Speichereinspritzsystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Leitungen (5) am Verteilerstück (3) mittels Adaptern (10) befestigt sind, wobei die Adapter (10) derart in das Verteilerstück (3) eingeschraubt sind, dass Druckeigenspannungen an einer Verschneidung zwischen der Längsbohrung (7) und einer Querbohrung (8) eingebracht werden.
- Speichereinspritzsystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zwischen dem Verteilerstück (3) und den Injektoren (4) ein zweites Verteilerstück (13) zur Verteilung von Kraftstoff auf die Injektoren (4) angeordnet ist.
- Speichereinspritzsystem nach Anspruch 5, dadurch gekennzeichnet, dass das Verteilerstück (3) und das zweite Verteilerstück (13) gleich ausgebildet sind.
- Speichereinspritzsystem nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass ein zusätzliches Speichervolumen in der Hochdruckpumpe (2) vorgesehen ist.
- Speichereinspritzsystem nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass ein zusätzliches Speichervolumen unmittelbar an der Hochdruckpumpe (2) vorgesehen ist.
- Verwendung von Leitungen (5) in einem Speichereinspritzsystem für eine Bereitstellung eines vorbestimmten oder des gesamten Speichervolumens zur Übernahme der Speicherfunktion im Speichereinspritzsystem.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10122421 | 2001-05-09 | ||
DE10122421 | 2001-05-09 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1260704A1 true EP1260704A1 (de) | 2002-11-27 |
EP1260704B1 EP1260704B1 (de) | 2004-08-04 |
Family
ID=7684089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02100463A Expired - Lifetime EP1260704B1 (de) | 2001-05-09 | 2002-05-08 | Speichereinspritzsystem mit erhöhter Bauteilfestigkeit von hochdruckführenden Komponenten |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1260704B1 (de) |
DE (1) | DE50200727D1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1378658A1 (de) * | 2002-07-04 | 2004-01-07 | Denso Corporation | Speicherkraftstoffeinspritzsystem für Brennkraftmaschinen |
DE102004021040A1 (de) * | 2004-04-29 | 2005-11-24 | Fev Motorentechnik Gmbh | Einspritzeinrichtung für eine Brennkraftmaschine |
WO2006100142A1 (de) * | 2005-03-21 | 2006-09-28 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine mehrzylindrige brennkraftmaschine |
WO2010086330A1 (de) * | 2009-02-02 | 2010-08-05 | Robert Bosch Gmbh | Geometrie zur festigkeitssteigerung bei bohrungsverschneidungen im hochdruckbereich |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19716659A1 (de) * | 1996-04-22 | 1997-11-27 | Usui Kokusai Sangyo Kk | Hochdruck-Kraftstoff-Einspritzrohr für eine Dieselkraftstoff-Verbrennungsmaschine |
WO2000011344A1 (en) * | 1998-08-18 | 2000-03-02 | Delphi Technologies, Inc. | Fuel injection system |
EP0999362A2 (de) * | 1998-11-07 | 2000-05-10 | Lucas Industries Limited | Kraftstoffsystem |
DE19945316A1 (de) * | 1999-09-22 | 2001-04-05 | Bosch Gmbh Robert | Kraftstoffhochdruckspeicher |
-
2002
- 2002-05-08 DE DE50200727T patent/DE50200727D1/de not_active Expired - Lifetime
- 2002-05-08 EP EP02100463A patent/EP1260704B1/de not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19716659A1 (de) * | 1996-04-22 | 1997-11-27 | Usui Kokusai Sangyo Kk | Hochdruck-Kraftstoff-Einspritzrohr für eine Dieselkraftstoff-Verbrennungsmaschine |
WO2000011344A1 (en) * | 1998-08-18 | 2000-03-02 | Delphi Technologies, Inc. | Fuel injection system |
EP0999362A2 (de) * | 1998-11-07 | 2000-05-10 | Lucas Industries Limited | Kraftstoffsystem |
DE19945316A1 (de) * | 1999-09-22 | 2001-04-05 | Bosch Gmbh Robert | Kraftstoffhochdruckspeicher |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1378658A1 (de) * | 2002-07-04 | 2004-01-07 | Denso Corporation | Speicherkraftstoffeinspritzsystem für Brennkraftmaschinen |
DE102004021040A1 (de) * | 2004-04-29 | 2005-11-24 | Fev Motorentechnik Gmbh | Einspritzeinrichtung für eine Brennkraftmaschine |
WO2006100142A1 (de) * | 2005-03-21 | 2006-09-28 | Robert Bosch Gmbh | Kraftstoffeinspritzeinrichtung für eine mehrzylindrige brennkraftmaschine |
US7588016B2 (en) | 2005-03-21 | 2009-09-15 | Robert Bosch Gmbh | Fuel injection apparatus for a multicylinder internal combustion engine |
WO2010086330A1 (de) * | 2009-02-02 | 2010-08-05 | Robert Bosch Gmbh | Geometrie zur festigkeitssteigerung bei bohrungsverschneidungen im hochdruckbereich |
Also Published As
Publication number | Publication date |
---|---|
EP1260704B1 (de) | 2004-08-04 |
DE50200727D1 (de) | 2004-09-09 |
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