EP1478843A1 - Einspritzdüse mit kraftstoffilter - Google Patents
Einspritzdüse mit kraftstoffilterInfo
- Publication number
- EP1478843A1 EP1478843A1 EP03708080A EP03708080A EP1478843A1 EP 1478843 A1 EP1478843 A1 EP 1478843A1 EP 03708080 A EP03708080 A EP 03708080A EP 03708080 A EP03708080 A EP 03708080A EP 1478843 A1 EP1478843 A1 EP 1478843A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- injection nozzle
- bores
- nozzle according
- nozzle
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 25
- 239000007924 injection Substances 0.000 title claims abstract description 25
- 239000000446 fuel Substances 0.000 title claims abstract description 21
- 238000002485 combustion reaction Methods 0.000 claims abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000005192 partition Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005406 washing 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
- 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
- F02M61/165—Filtering elements specially adapted in fuel inlets to injector
Definitions
- the invention relates to an injection nozzle with a fuel filter for reciprocating piston internal combustion engines with a filter body in the pressure line of a holder body and nozzle holder comprising nozzle bodies.
- fuel filters are required in order to protect the sensitive components against particle contamination of the fuel in the form of chips, detached burrs or the like. Such fuel filters thus extend the service life of the injection nozzle and ensure its trouble-free operation.
- Known rod filters are used either in the holder body of the nozzle holder or outside the same, within the screw connections in the fuel pressure line.
- a partition wall which is spaced apart from the wall of the pressure channel and extends in the channel direction, they enable undesired residues to be collected in a dirt space on one side of the partition wall.
- the fuel washing around the partition in the circumferential direction reaches the pressure channel leading to the nozzle body via a clean room on the clean side of the rod filter.
- rod filters are limited because, because of the space required, they can only be arranged at a distance from the nozzle body, and because the residues increasingly fill the dirt space, some of which get caught in the filter gaps. This leads to malfunctions that only can be remedied by replacing the rod filter or the component receiving it. Due to the strict press fit, metal particles can become detached when installing such rod filters.
- the present invention has for its object to provide a robust and largely maintenance-free fuel filter for injection nozzles, which also manages with a relatively small filter area, so that it can be positioned as close as possible to the nozzle needle.
- the filter surface or filter gaps are formed by bores in the filter body and filter elements arranged movably therein.
- a dynamically acting fuel filter in which filter elements loosely arranged in the bores ensure that the residues entering the bores of the filter body are effectively hammered, ground and thus crushed by the filter elements pulsating with the flow until they become one Have reached particle size, which allows a passage through the filter gap.
- the dynamic size reduction effect of the filter elements enables a fuel filter with a relatively small filter area to be realized, the gap dimensions of which have to be designed to match the structural design of the injection nozzle.
- Such a dynamic fuel filter is particularly well suited for injection nozzles for direct injection engines, especially for those with seat-drilled nozzles that are equipped with the Known rod filters can no longer be adequately protected.
- a plurality of boreholes with parallel flow can be provided, depending on the size of the filter surface to be guaranteed.
- a plurality of filter elements can also be provided in each bore in order to improve the crushing effect in this way.
- the filter elements are balls that form filter gaps with the walls of the bores, from which the filter surface is composed. Two or more of these balls can be arranged one behind the other in a bore. In this way, a particularly good comminution effect is achieved because several balls pulsate strongly not only in the direction of flow, but also transversely thereto, insofar as this is possible within the existing filter gaps.
- the pressure line opens and / or opens into antechambers of the filter body, which in turn communicate with the filter surface or the filter gaps.
- both the pressure lines on the one hand and the bores on the other hand open into antechambers on the input and / or output side of the bores, by means of which the path of movement of the filter elements or the balls in the flow direction is limited in accordance with the dimensions of these antechambers.
- the residues present in the antechambers will work together there crushed with the adjacent preferably hardened component walls under the impact of the filter elements, which are preferably also hardened.
- a preferred embodiment of the filter body is that it is essentially disc-shaped, so that it can advantageously be clamped between the holder body and the nozzle body. It then simultaneously forms the intermediate plate usually present in injection nozzles, which is lapped on both sides, so that it ensures a tight connection with the pressure line with correspondingly machined surfaces of the holder body on the one hand and the nozzle body on the other hand.
- the antechambers may be formed by grooves which are wider than the diameter of the bores.
- the groove depth is less than the ball radius, so that the ball is always held with its largest diameter inside the bores.
- the groove shape is expediently chosen such that all the bores open into it and that the pressure line is connected to it, offset from the bores. In this way, the connection from the pressure line to the filter surface or the filter gaps, ie the fuel flows from the pressure line connected to the inlet via the inlet-side prechamber through the holes and the outlet-side prechamber into the pressure line leading to the nozzle needle.
- filter disks By assembling the filter body from several filter disks, it is possible to use filter disks with cutouts that correspond to the groove shape instead of the grooves forming the prechambers. While the pre-chambers are formed by such filter disks, a further filter disk is required, in which the bores are made. Assembled, all filter disks result in the filter body according to the invention.
- a preferred embodiment provides four bores distributed within half a circumference, which are connected to one another by a prechamber in the form of a part-circular groove.
- a prechamber in the form of a part-circular groove.
- FIG. 1 shows an axial section through an injection nozzle with section II of FIG. 3 2 shows an axial section through the injection nozzle according to FIG. 1 with a section according to II-II of FIG. 4
- FIG. 3 shows a cross section through FIG. 1 according to III-III
- FIG. 4 shows a cross section through FIG. 2 according to IV-IV 5 shows a variant of the filter body with associated enlargement
- Figures 1 to 4 show different sections of an injection nozzle 1, the nozzle holder 2 a holder body
- a compression spring 5 is received, which is biased against a nozzle needle 7 via a pressure pin 6.
- An intermediate plate which is designed as a disk-shaped filter body 8, is located between the holder body 3 and the nozzle body 4.
- Holder body 3 and nozzle body 4 are clamped against one another by means of a nozzle clamping nut 9 and centered relative to one another by means of two fixing pins 10.
- a fuel inlet 11 is connected to the holder body via a connection 12 to a pressure line 13, the upper section of which
- FIGS. 1 and 2 show the same cross section; they differ only in the different information about the cutting profiles of the associated axial cuts according to FIGS. 1 and 2.
- the cutting profile II according to FIG. 3 relates to the illustration according to FIG. 1; the course of the cut according to II-II according to FIG. 4 relates to the representations 2.
- the sectional plane While on the right side of the sectional view according to FIGS. 1 and 2, the sectional plane is in each case laid by a locating pin 10, their sectional sides, which are on the left with respect to the longitudinal axis, differ from one another; in Figure 1, the corresponding sectional plane runs through the fuel pressure line 13; in Figure 2, the corresponding sectional plane runs through one of a total of four bores 18 in the filter body 8.
- each of these bores 18 there is a filter element in the form of a ball 19, which is thrown back and forth between the stop surfaces during operation of the injection pump, one of which through the Holder body 3, the other is formed by the nozzle body 4.
- a prechamber 20 is located on both sides between the ball 19 and the associated stop surfaces, as is indicated more precisely in the enlargement of FIG. 5 for drawing reasons.
- the filter body in the embodiment according to FIG. 5 differs from that according to FIGS. 1 to 4 only in that two balls 19 are filled in the bore 18, whereas in the embodiment according to FIGS. 1 to 4 only a single ball 19 is provided, as can be seen in FIG. 2.
- 5 shows the filter body 8 as such, ie, with a central bore 21 for the nozzle needle 7 and a further bore 22 for a fixing pin 10.
- the two end faces of the filter body 8 are lapped so that they are close to the lapped end faces of the holder body 3 on the one hand and the nozzle body 4 on the other.
- the enlargement V to FIG. 5 illustrates the formation of the antechambers 20 by a groove 23 which, as shown in FIGS.
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
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI200330055T SI1478843T1 (en) | 2002-02-27 | 2003-02-01 | Injection nozzle with a fuel filter |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10208544A DE10208544A1 (de) | 2002-02-27 | 2002-02-27 | Einspritzdüse mit Kraftstofffilter |
| DE10208544 | 2002-02-27 | ||
| PCT/EP2003/001014 WO2003072933A1 (de) | 2002-02-27 | 2003-02-01 | Einspritzdüse mit kraftstoffilter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1478843A1 true EP1478843A1 (de) | 2004-11-24 |
| EP1478843B1 EP1478843B1 (de) | 2005-06-08 |
Family
ID=27740481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03708080A Expired - Lifetime EP1478843B1 (de) | 2002-02-27 | 2003-02-01 | Einspritzdüse mit kraftstoffilter |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US20050116068A1 (de) |
| EP (1) | EP1478843B1 (de) |
| JP (1) | JP2005518502A (de) |
| KR (1) | KR20040086440A (de) |
| CN (1) | CN1630784A (de) |
| AU (1) | AU2003212232A1 (de) |
| DE (2) | DE10208544A1 (de) |
| ES (1) | ES2234454T3 (de) |
| WO (1) | WO2003072933A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007534889A (ja) * | 2004-04-29 | 2007-11-29 | マツレク リミテッド | 内燃エンジン用のポンプ式噴射機(噴射機)本体とノズル本体との間の継手パッキンの構造 |
| DE102004028131A1 (de) * | 2004-06-09 | 2006-01-05 | Motorenfabrik Hatz Gmbh & Co. Kg | Kraftstoffeinspritzvorrichtung mit Sperrventil |
| DE102014212779A1 (de) * | 2014-07-02 | 2016-01-07 | Continental Automotive Gmbh | Kraftstoffinjektor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1036576B (de) * | 1946-01-17 | 1958-08-14 | Giuseppe Sola | Einspritzduese fuer Brennkraftmaschinen |
| US2749182A (en) * | 1953-01-27 | 1956-06-05 | John F Campbell | Nozzle construction |
| DE3237932A1 (de) * | 1982-10-13 | 1984-04-19 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoff-einspritzduese fuer brennkraftmaschinen |
| US5238192A (en) * | 1991-12-18 | 1993-08-24 | Siemens Automotive L.P. | Filter for solenoid operated fluid metering devices |
| US6015103A (en) * | 1998-06-08 | 2000-01-18 | General Motors Corporation | Filter for fuel injector |
| US6572028B1 (en) * | 2000-01-19 | 2003-06-03 | Visteon Global Technologies, Inc. | Combined needle guide, filter, and flow director for gasoline fuel injectors |
| US6708906B2 (en) * | 2000-12-29 | 2004-03-23 | Siemens Automotive Corporation | Modular fuel injector having a surface treatment on an impact surface of an electromagnetic actuator and having an integral filter and dynamic adjustment assembly |
-
2002
- 2002-02-27 DE DE10208544A patent/DE10208544A1/de not_active Withdrawn
-
2003
- 2003-02-01 AU AU2003212232A patent/AU2003212232A1/en not_active Abandoned
- 2003-02-01 CN CNA038035898A patent/CN1630784A/zh active Pending
- 2003-02-01 US US10/504,280 patent/US20050116068A1/en not_active Abandoned
- 2003-02-01 KR KR10-2004-7013226A patent/KR20040086440A/ko not_active Withdrawn
- 2003-02-01 DE DE50300637T patent/DE50300637D1/de not_active Expired - Fee Related
- 2003-02-01 JP JP2003571592A patent/JP2005518502A/ja active Pending
- 2003-02-01 WO PCT/EP2003/001014 patent/WO2003072933A1/de not_active Ceased
- 2003-02-01 EP EP03708080A patent/EP1478843B1/de not_active Expired - Lifetime
- 2003-02-01 ES ES03708080T patent/ES2234454T3/es not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03072933A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2234454T1 (es) | 2005-07-01 |
| DE10208544A1 (de) | 2003-09-11 |
| WO2003072933A1 (de) | 2003-09-04 |
| DE50300637D1 (de) | 2005-07-14 |
| ES2234454T3 (es) | 2005-12-01 |
| JP2005518502A (ja) | 2005-06-23 |
| EP1478843B1 (de) | 2005-06-08 |
| CN1630784A (zh) | 2005-06-22 |
| AU2003212232A1 (en) | 2003-09-09 |
| US20050116068A1 (en) | 2005-06-02 |
| KR20040086440A (ko) | 2004-10-08 |
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