EP2265812A1 - Bauelementpaarung sowie vorrichtung mit bauelementpaarung - Google Patents
Bauelementpaarung sowie vorrichtung mit bauelementpaarungInfo
- Publication number
- EP2265812A1 EP2265812A1 EP08873472A EP08873472A EP2265812A1 EP 2265812 A1 EP2265812 A1 EP 2265812A1 EP 08873472 A EP08873472 A EP 08873472A EP 08873472 A EP08873472 A EP 08873472A EP 2265812 A1 EP2265812 A1 EP 2265812A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- gap
- medium
- pressure
- media
- 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 description 21
- 230000010355 oscillation Effects 0.000 claims description 7
- 230000007613 environmental effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 7
- 239000002283 diesel fuel Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
-
- 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
- F02M55/004—Joints; Sealings
-
- 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
- F02M59/442—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 preventing fuel leakage around pump plunger, e.g. fluid barriers
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/02—Packing the free space between cylinders and 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
- F04B53/164—Stoffing boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F7/00—Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
Definitions
- the invention relates to a component pairing according to the preamble of claim 1.
- Such a component pairing is provided, for example, in a fuel injector described in DE 102 07 227 A1.
- the first component of a nozzle body of the injector and the second, relative to the first component adjustable component is formed by a nozzle needle, which is guided axially adjustable in the nozzle body.
- a circumferential gap extending in the axial direction is realized, which separates a nozzle chamber with fuel under rail pressure (first medium) and a low-pressure chamber with low-pressure fuel (second medium).
- the fuel in the nozzle chamber tends to flow axially through the gap in the direction of the low-pressure space due to the high pressure difference to the low-pressure space, resulting in leakage losses.
- high-performance and therefore comparatively large-sized high-pressure pumps must be used.
- Generic component pairings occur in addition to fuel injectors in other technical devices, such as common-rail high-pressure pumps, high-pressure gasoline pumps or hydraulic pumps, etc.
- the component pairings must simultaneously fulfill two functions, namely the movable guide of the second component relative to the first component and the prevention of leakage, and / or mixing of two media, by sealing the first and the second space against each other. There is the problem that these two functionalities (movable guidance and leakage minimization or sealing) lead to technical contradictions.
- a gap between two components while ensuring sufficient mobility of the components to each other due to the necessary gap width usually leads to an undesirable oil dilution by fuel entry into the engine oil or to an oil entry in fuel, or fuel injectors, as described above, excessive fuel leakage from the high pressure area of the injector in its low pressure area.
- gap width is reduced in order to avoid the aforementioned problems, undesired friction or wear occurs between the components that can be adjusted relative to one another.
- the invention is therefore an object of the invention to propose a component pairing, in spite of ensuring sufficient mobility of the components relative leaks and / or mixing of media meeting each other in the gap or adjacent to the gap can be avoided. Furthermore, the object is to propose a correspondingly optimized device, in particular a fuel delivery device, a hydraulic pump or a fuel injector.
- the invention is based on the idea, for the simultaneous realization of a sufficiently wide gap and to avoid leaks and / or mixing of at least two media, to associate the gap formed between the at least two components with at least one vibration generator, which is designed in such a way that the Vibrations generated by it (pressure oscillations) are transmitted to the at least one medium located in the gap and there have at least one point or at least one area an increase in pressure of the at least one medium result. From this pressure increase results in a pumping effect and from this a return delivery of the first medium in the direction of the first space and / or a return delivery of the second medium in the direction of the second space.
- an embodiment of the component pairing is preferred in the at least two spaces adjacent to each other with axial distance to the gap.
- each of the first and the second medium is a liquid.
- the activation of the vibration exciter can take place both externally, for example via an electronic control unit, or internally out of the system having the component pairing.
- the vibrations introduced can have an advantageous effect on the tribological properties of at least one of the media, from which in turn or additionally a friction force reduction and / or a wear minimization can result.
- the at least one vibration exciter is accommodated in the first or in the second component.
- the vibration generator is sealed against the media.
- a total of several Vibration exciters are provided.
- a plurality of vibration exciters in only one of the components or to distribute the vibration exciter, preferably evenly, on the components.
- the aim of using several vibration exciters is to distribute vibrations as uniformly as possible in the (total) gap and / or over the gap circumference.
- at least one of the vibration exciters is arranged such that vibrations of this are emitted perpendicular to the longitudinal or axial extent of the gap.
- the vibration exciter As a piezoelectric actuator.
- the vibration exciter may be designed to work acoustically or else purely mechanically, in particular by the high-frequency striking of several components.
- the gap is formed as a guide gap
- the second component is thus guided over the gap on the first component. It is preferable to provide no further guidance in addition to the gap.
- Optimal results with regard to the pumping effect or return-promoting effect resulting from the oscillations are achieved if the oscillation frequency of the oscillations generated by the oscillation exciter is significantly higher than the relative movement frequency of the components relative to one another. It is preferred if only one of the components actively adjusted and the other component is arranged stationary relative to the second component, wherein also an embodiment can be realized with two actively adjustable components. In any case, the oscillation frequency should be calculated so as to result in an increase in pressure in the gap.
- the gap width remains the same, at least approximately, during the adjustment movement of the components relative to one another, ie, the two components move in the longitudinal direction of the gap or in the axial direction relative to one another.
- a vibration exciter to reduce or prevent leakage from a first medium in the second space, especially when it comes to different media and at least one environmental parameters or state parameters of the media, such as the temperature and / or Pressure of the media, are different / is.
- a vibration exciter to reduce or prevent leakage from a first medium in the second space, especially when it comes to different media and at least one environmental parameters or state parameters of the media, such as the temperature and / or Pressure of the media, are different / is.
- the first room diesel fuel under high pressure of, for example, 1200 bar and possibly even over 2000 and in the second room as a second medium hydraulic or lubricating oil, for example, at atmospheric pressure of about 1 bar.
- the component pairing with at least one vibration exciter is given for applications in which the first medium is different from the second medium, but the ambient conditions conditions, ie the state parameters of the media, at least approximately, are the same.
- the first medium in the first room for example diesel fuel under ambient pressure of 1 bar
- the second medium in the second room hydraulic or lubricating oil, also under ambient pressure of 1 bar.
- Another application or field of application of component pairing is for cases where the media are the same, but at least one environmental condition, i. at least one state parameter, such as the media pressure or the medium temperature, etc. is different. It is thus possible, for example, to provide diesel fuel under high pressure of about 1200 bar or optionally even more than 2000 bar in the first room and also diesel fuel in the second room, but under ambient pressure of about 1 bar. These conditions are particularly encountered in fuel injectors. By using at least one vibration exciter, the leakage loss from the first to the second space can be reduced or preferably even completely prevented here.
- the components are part of a high-pressure pump, in particular a high-pressure fuel pump or a hydraulic pump.
- a high-pressure fuel pump or a hydraulic pump it may be, for example, a pairing of a valve piston or a reciprocating piston with a plunger body, a socket, a housing or a cylinder act.
- the component pairing can be used in fuel injectors, wherein here preferably one of the components is a control valve element and the other component is a control valve body or one of the components is an injector body, nozzle body or a sleeve and the other component is a one-part or multipart injection valve element (nozzle needle). is.
- Other applications of the described component pairing are conceivable.
- the invention leads to a device with at least one component pairing described above, wherein the device may be formed as a fuel delivery pump, as a hydraulic pump or as a fuel injector.
- the device may be formed as a fuel delivery pump, as a hydraulic pump or as a fuel injector.
- Other devices in particular devices intended for use in motor vehicles, can also be equipped with a previously described component pairing.
- FIG. 1 shows a schematic, sectioned illustration of a component pairing comprising two components which can be adjusted relative to one another and a vibration exciter.
- the component pairing 1 shows a component pairing 1, as used, for example, in a fuel injector or a pump. set can come.
- the component pairing 1 comprises a first, stationary, ie non-adjustable, component 2 and a second, relative to the first component 2 in the direction of arrow 4 axially adjustable component 3. In the illustrated embodiment, it is at the second component 3 to a substantially circular cylindrical contoured component 3, which is received in a likewise circular cylindrical receiving bore 5 of the first component 2.
- a gap 6 Radial between the components 2, 3 is a gap 6 which surrounds the second component 3 in its entirety and forms a circumferential gap, which simultaneously serves as a guide gap for guiding the second component 3 relative to the first component 2.
- the gap width ie the radial extent of the gap 6, is a few micrometers.
- a first space 7 adjoins the gap 6 and, at least temporarily, is filled with a first medium 8.
- a second space 9 On the opposite axial side of the gap 6 adjacent to this, a second space 9, in which, at least temporarily, a second medium 10 is received.
- a piezoelectric vibration exciter 11 is arranged, which emits vibrations 12, which pass through the first component 2, that is transmitted from this and then in the gap 6 and the medium provided therein 8, 10 pass.
- the vibrations 12 are reflected at the lateral surface 13 of the second component 3 delimiting the gap 6.
- the vibrations 12 pressure waves
- an increase in pressure which is responsible for a pumping effect, which in turn has a return delivery of the first medium 8 in the direction of the first space 7 and a return delivery of the second medium 10 in the direction of the second space 9.
- a vibration exciter 11 can be provided in the second component 3. It is also conceivable, at least in one of the components 2, 3, to arrange a plurality of vibration exciters 11, in particular with the absence, in a plurality in the axial direction and / or in the circumferential direction spaced or merging areas in the gap 6, a pressure increase realize as well as to distribute the vibrations 12 evenly.
- the first medium 8 and the second medium 10 are different media which, however, are at least approximately under the same pressure, so that the media 8, 10 viewed in the axial direction approximately in the Meet gap center in area 14.
- the media 8, 10 endeavor to flow back into the respective space 7, 9.
- the media 8, 10 are identical, but are under a different pressure. With the aid of the vibration exciter 11 or the pressure increase in the region 14 resulting from the use of the vibration exciter 11, leakage losses from the first space 7 with the first medium 8 under high pressure into the second space 9 with the second medium 10 under low pressure are avoided ,
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
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200810000760 DE102008000760A1 (de) | 2008-03-19 | 2008-03-19 | Bauelementpaarung sowie Vorrichtung mit Bauelementpaarung |
| PCT/EP2008/066897 WO2009115151A1 (de) | 2008-03-19 | 2008-12-05 | Bauelementpaarung sowie vorrichtung mit bauelementpaarung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2265812A1 true EP2265812A1 (de) | 2010-12-29 |
| EP2265812B1 EP2265812B1 (de) | 2013-03-27 |
Family
ID=40568566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08873472A Not-in-force EP2265812B1 (de) | 2008-03-19 | 2008-12-05 | Bauelementpaarung sowie vorrichtung mit bauelementpaarung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2265812B1 (de) |
| CN (1) | CN101978159B (de) |
| DE (1) | DE102008000760A1 (de) |
| WO (1) | WO2009115151A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799508B (zh) * | 2018-06-21 | 2020-08-18 | 西安交通大学 | 一种超声波动密封装置及方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2751702B1 (fr) * | 1996-07-24 | 1998-09-04 | Renault | Dispositif d'injection de carburant pour moteur a combustion interne |
| US6543700B2 (en) * | 2000-12-11 | 2003-04-08 | Kimberly-Clark Worldwide, Inc. | Ultrasonic unitized fuel injector with ceramic valve body |
| DE10207227A1 (de) | 2002-02-21 | 2003-09-04 | Bosch Gmbh Robert | Kraftstoffeinspritzventil für Brennkraftmaschinen |
| FR2895031B1 (fr) * | 2005-12-19 | 2011-06-03 | Renault Sas | Injecteur de carburant pour moteur a combustion interne |
| DE102006026153A1 (de) * | 2006-06-06 | 2007-12-13 | Robert Bosch Gmbh | Sprüheinrichtung für Fluide |
-
2008
- 2008-03-19 DE DE200810000760 patent/DE102008000760A1/de not_active Withdrawn
- 2008-12-05 CN CN200880128125.5A patent/CN101978159B/zh not_active Expired - Fee Related
- 2008-12-05 EP EP08873472A patent/EP2265812B1/de not_active Not-in-force
- 2008-12-05 WO PCT/EP2008/066897 patent/WO2009115151A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009115151A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101978159A (zh) | 2011-02-16 |
| WO2009115151A1 (de) | 2009-09-24 |
| EP2265812B1 (de) | 2013-03-27 |
| DE102008000760A1 (de) | 2009-09-24 |
| CN101978159B (zh) | 2013-08-14 |
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