EP2699790A1 - Component, in particular of a fuel injection system, having a surface - Google Patents
Component, in particular of a fuel injection system, having a surfaceInfo
- Publication number
- EP2699790A1 EP2699790A1 EP12709579.2A EP12709579A EP2699790A1 EP 2699790 A1 EP2699790 A1 EP 2699790A1 EP 12709579 A EP12709579 A EP 12709579A EP 2699790 A1 EP2699790 A1 EP 2699790A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- fuel
- μηι
- value
- fuel injection
- 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 title claims abstract description 46
- 238000002347 injection Methods 0.000 title claims abstract description 18
- 239000007924 injection Substances 0.000 title claims abstract description 18
- 239000002551 biofuel Substances 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 8
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 8
- 229930195729 fatty acid Natural products 0.000 claims abstract description 8
- 239000000194 fatty acid Substances 0.000 claims abstract description 8
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 8
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims 1
- 239000010432 diamond Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 239000003225 biodiesel Substances 0.000 description 10
- 239000002283 diesel fuel Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical group Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 208000036829 Device dislocation Diseases 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002816 fuel additive Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method 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
- 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
- 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
-
- 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
- F02M61/167—Means for compensating clearance or thermal expansion
-
- 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
- F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
-
- 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
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
-
- 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
- F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
- F02M2200/8069—Fuel injection apparatus manufacture, repair or assembly involving removal of material from the fuel apparatus, e.g. by punching, hydro-erosion or mechanical operation
Definitions
- the present invention relates to a component, in particular a
- Fuel injection systems with a surface. Furthermore, the invention relates to a method for producing such a component.
- the surface has an altered surface texture, in particular with regard to the surface properties and their surface structure.
- Such components of a component group are known from DE 1 1 2008 002 560 T5. These components are subcomponents of a
- Fuel injection system in particular a fuel injector, for a
- valve needle and the valve needle Internal combustion engine.
- the valve needle and the valve needle Internal combustion engine.
- the valve needle and the valve needle Internal combustion engine.
- Valve needle receiving valve pin body improved resistance to wear on. This is to reduce the failure rates of the
- Fuel! Njektors be achieved. This should be achieved by a special coating of the valve needle and / or the valve needle body. Examples of such a coating are a metal nitride coating or a DLC coating involving various physical
- Fuel injection system can be operated with fuels that cause high wear rates - ie wear rates.
- fuels include, for example, a low lubricity diesel fuel, a very low sulfur fuel, certain biodiesel, and, for example, fuels having various fuel additives.
- the object of the invention is to modify the surface condition of at least one component of a component group in such a way that the possibility of the adhesion of deposits is reduced,
- the surface has a structure which counteracts adhesion of a reactive medium, in particular a fuel, a biofuel, an additive and / or a fatty acid.
- the corresponding method for producing such a component provides that a structure is applied to the surface of the component, which counteracts adhesion of a reactive medium, in particular a fuel, a biofuel, an additive and / or a fatty acid.
- the surface texture, ie the surface property and the surface structure, is designed to minimize adhesive force.
- This refinement or this method is based on the recognition that such a component or groups of components may increasingly be with a reactive medium, in particular a fuel (diesel fuel, gasoline), a biofuel, an additive, a fatty acid or any mixture thereof , Contact, in which the possibility of the formation of deposits and / or of aging products in the medium is increased by the basic nature of the medium or by the inclusion of additives.
- a reactive medium in particular a fuel (diesel fuel, gasoline), a biofuel, an additive, a fatty acid or any mixture thereof ,
- Such deposits and aging products preferably adhere to the medium-carrying, ie
- the components are designed to execute a switching function in the case of narrow guide plays, the guided component can be prevented from switching by such a jamming or gluing. Because at least one
- the structure is a screw thread structure or a rhombic structure or one of the two structures or a combination of the two structures is applied. These structures have proven to be particularly suitable to counteract adhesion of a reactive medium.
- the surface texture of an arithmetic mean roughness Ra is determined and the average roughness Ra of
- the surface is processed by a grinding process, a laser structuring process or a hard turning process, and consequently the corresponding component is ground, laser-structured
- a grinding process for example, a center grinding process is in question, in which there is a formation of the surface with an outer contour, for example a cylindrical surface that matches or at least resembles the screw thread structure.
- Another grinding process is a
- the component is an arbitrary component of a fuel injection system, in particular a fuel pump
- Fuel injector or other system critical component such as
- a switching valve for example, a switching valve.
- the object of the invention is therefore preferably usable with cooperating components of a fuel injection system, wherein the
- Fuel injection system is operated with a fuel having at least one biodiesel mixture.
- the constituents of the admixture adhere to metallic surfaces by a polar character of the fatty acids contained in the biodiesel mixture.
- a reduction of the adhesive force can be achieved by a reduction of the material carrying component Rmr (0, 1), (0,2) and (0,3) (according to Abbott).
- the material-carrying component may be the material-carrying component Rmr after one
- Abbott curve of the surface of the component can be reduced by up to 65%.
- Figure 2 shows a pilot plant for forming a guide game between a coupler piston and a take-off bell to a
- FIG. 3 shows a diagram with the illustration of the effects of different surface properties of a component as a function of the constant surface of a counter component
- Figure 4 is a diagram with the exponential relationship between an adhesive force and a change in the surface finish of a component
- Figure 5 is a diagram showing the percentage distribution of surface properties of a component against an adhesive force of the component.
- the left figure of Figure 1 shows a coupler module of a
- Fuel injection system of an internal combustion engine This is
- Fuel injection system is designed in particular for use in a common rail fuel injection system, in which fuel is stored in a memory under a pressure of from about 1600 bar. This fuel is supplied from a fuel tank of a high-pressure pump and this memory Fuel from the store becomes fuel as needed! taken from the ejectors via high pressure lines.
- the fuel injectors are for a
- Such a fuel! Njektor has such a coupler module as part of the electrically controlled
- diesel fuel is increasingly biodiesel in the order of up to 20%, possibly even beyond going added.
- the diesel fuel can also be replaced by alternative fuels that have at least similar ignition properties
- Diesel fuel to be replaced All of these alternative fuels or biodiesel have the property that at least parts of their constituents can adhere to metallic surfaces and form deposits due to the polar character of the fatty acids they contain.
- the fuel-pervaded coupler module according to the left-hand illustration of FIG. 1 has a coupler sleeve 1 with a continuous cylindrical bore, into which two coupler pistons 2 are inserted.
- a coupler piston 2 with an annular flange, which prevents the complete immersion of the coupler piston 2 in the bore is in the right figure of Figure 1 in a
- the two coupler pistons are guided, for example, with a guide clearance of 4 ⁇ m in the coupler sleeve 1.
- Coupler transmits an example applied by a piezoelectric actuator on the upper coupler piston 2 force on the lower
- the invention is explained in the present case on such a coupler module, but is applicable to any other component group of a Kraftstoffeinspritzsytems.
- the inventively designed component is the coupler piston 2 or the coupler sleeve 1 or both as a component group.
- the test facility according to FIG. 2 has a module with a base part 3 which has a cylindrical recess into which a coupler piston 2 with its annular flange is inserted and clamped.
- Coupling piston 2 is surrounded by a discharge bell 4, whose cylindrical bore for receiving the actual coupler piston 2 with respect to the diameter and the surface finish of the bore of the coupler sleeve corresponds to 1.
- a blended with biodiesel diesel fuel is fed into the discharge bell 4, along the fit between the coupler piston 2 and the bell 4 at the ceremoniessspiel5 thus formed with a guide game of preferably 5 ⁇ passed and through the
- the guide game can be varied between 3 ⁇ and 14 ⁇ .
- To carry out the experiment for example, in a timeframe of several hours, days or weeks mixed with biofuel diesel fuel or even concentrated biofuel o the pilot plant fed.
- To evaluate the experiment the force
- FIG. 3 shows a diagram with the representation of the effects
- the surface textures are characterized by an arithmetic mean roughness Ra, an average roughness Rz and a profile depth Pt.
- the Gradients of the individual surface textures indicate the relationship to the respective breaking force F.
- the breaking force F thus denotes the previously described release force of the withdrawal bell 4. It can be seen that the breaking force F is the lowest in each case when the arithmetic mean roughness Ra and the profile depth Pt are large.
- FIG. 4 shows, analogously to FIG. 3, a diagram with the exponential relationship between an adhesive force and a change in the FIG
- FIG. 5 diagrammatically shows the different combinations of surface properties (surface property and surface structure) for three different modules MD1, MD2 and MD3.
- this graph shows the effects of the arithmetic mean roughness Ra, the average roughness depth Rz and the profile depth Pt versus the different material support rates Rmr and in particular the breaking force F.
- Module MD1 shows an equal ratio of all values that can be represented by the implementation of the invention.
- Module MD2 shows that a reduction of the average arithmetic mean roughness Ra, the average roughness depth Rz and the profile depth Pt and an increase in the material carrying component Rmr lead to an increase in the breaking force F.
- the arithmetic mean roughness Ra, the average roughness Rz and the tread depth PT only slightly further reduced and there is an increase in the material carrying part Rmr, in particular the breaking force F increases rapidly.
- balanced module MD1 minimizes the possibility of the effects of adhering deposits on the respective surface. In contrast, the possibility of the effect of the adhesion of deposits on the respective surface is very high in module MD3. -9-
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110007876 DE102011007876A1 (en) | 2011-04-21 | 2011-04-21 | Component, in particular a fuel injection system, with a surface |
PCT/EP2012/054230 WO2012143178A1 (en) | 2011-04-21 | 2012-03-12 | Component, in particular of a fuel injection system, having a surface |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2699790A1 true EP2699790A1 (en) | 2014-02-26 |
EP2699790B1 EP2699790B1 (en) | 2015-06-03 |
Family
ID=45855748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12709579.2A Active EP2699790B1 (en) | 2011-04-21 | 2012-03-12 | Component, in particular of a fuel injection system, having a surface |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2699790B1 (en) |
DE (1) | DE102011007876A1 (en) |
WO (1) | WO2012143178A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016211228A1 (en) * | 2016-06-23 | 2017-12-28 | Robert Bosch Gmbh | High pressure fuel pump with a housing and method for processing channels of a housing of a high pressure fuel pump |
DE102016211446A1 (en) * | 2016-06-27 | 2017-12-28 | Robert Bosch Gmbh | Method for producing an injector for injecting fuel |
DE102018217595A1 (en) * | 2018-10-15 | 2020-04-16 | Continental Automotive Gmbh | Fuel injector and method for producing a nozzle body for a fuel injector |
DE102018217648A1 (en) * | 2018-10-15 | 2020-04-16 | Continental Automotive Gmbh | Fuel injector and method for producing a nozzle body for a fuel injector |
DE102018217872A1 (en) * | 2018-10-18 | 2020-04-23 | Robert Bosch Gmbh | Dosing module |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10232050A1 (en) * | 2002-07-16 | 2004-02-05 | Robert Bosch Gmbh | Fuel injection valve, for an IC motor, has micro-recesses in the valve needle sealing surface and/or the valve seat to improve the drift behavior of the injected fuel volume and increase the working life |
DE10344584A1 (en) * | 2003-09-25 | 2005-04-28 | Bosch Gmbh Robert | Fuel injection valve for direct fuel injection into an internal combustion engine's combustion chamber has a valve needle with maximum diameter on a flow-off edge |
DE102004063165A1 (en) * | 2004-12-29 | 2006-07-13 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
DE102006042444A1 (en) * | 2006-09-09 | 2008-03-27 | Bayerische Motoren Werke Ag | Fuel injection valve |
US8006715B2 (en) | 2007-09-20 | 2011-08-30 | Caterpillar Inc. | Valve with thin-film coating |
WO2011029941A1 (en) * | 2009-09-14 | 2011-03-17 | Continental Automotive Gmbh | Nozzle assembly for an injection valve and injection valve |
-
2011
- 2011-04-21 DE DE201110007876 patent/DE102011007876A1/en not_active Withdrawn
-
2012
- 2012-03-12 WO PCT/EP2012/054230 patent/WO2012143178A1/en active Application Filing
- 2012-03-12 EP EP12709579.2A patent/EP2699790B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012143178A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102011007876A1 (en) | 2012-10-25 |
WO2012143178A1 (en) | 2012-10-26 |
EP2699790B1 (en) | 2015-06-03 |
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