EP1576279A1 - Soupape d'injection de carburant - Google Patents
Soupape d'injection de carburantInfo
- Publication number
- EP1576279A1 EP1576279A1 EP03812549A EP03812549A EP1576279A1 EP 1576279 A1 EP1576279 A1 EP 1576279A1 EP 03812549 A EP03812549 A EP 03812549A EP 03812549 A EP03812549 A EP 03812549A EP 1576279 A1 EP1576279 A1 EP 1576279A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel injection
- injection valve
- tube
- valve according
- nozzle body
- 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 61
- 238000002347 injection Methods 0.000 title claims abstract description 37
- 239000007924 injection Substances 0.000 title claims abstract description 37
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000004323 axial length Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009736 wetting 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
-
- 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
Definitions
- the invention relates to a fuel injector according to the preamble of the main claim.
- DE 35 33 085 AI discloses a metering valve for metering liquids or gases, in particular an injection valve for fuel injection systems in internal combustion engines, which has a piezo stack actuator, the change in length of which is transmitted to a valve needle controlling a metering opening when an excitation voltage is applied, and determines the stroke of the valve needle.
- the substance to be measured is fed via a feed line, which is designed in the form of a deep hole in the valve body.
- a disadvantage of the injection valve known from DE 35 33 085 AI is that the housing of the injection valve is very solid and thus heavy and voluminous. It requires a large installation space and increased material and manufacturing costs.
- the drilling is due on the one hand to the manufacturing process with contaminants such as drilling residues provided, on the other hand difficult to clean due to the material of the housing and the relatively rough surface.
- the substance to be measured is subject to a high degree of contamination, which can lead to deposits and subsequent valve malfunctions.
- the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the tube that leads the fuel from the supply to the valve group can be manufactured separately and attached to the fuel injector, so that with a suitable choice of material, a higher level of cleanliness of the fuel through a smooth surface can be achieved with less wetting and the absence of a dead volume.
- the common integrated arrangement of the fuel injector and the tube in a common housing is particularly advantageous.
- the tube is advantageously made of steel and has an inner diameter of approximately 3 mm with a wall thickness of approximately 0.4 mm.
- the tube extends axially parallel to the fuel injector. taking into account the central fuel supply, by laying the pipe bent radially outward to the housing.
- Another advantageous embodiment provides for a straight pipe to be axially parallel over the entire length with a suitable decentralized arrangement of the inlet connection. This is particularly advantageous because it is easy to manufacture.
- FIG. 1A shows a schematic illustration of a first exemplary embodiment of a fuel injection valve according to the invention
- FIG. 1B shows a section through the first exemplary embodiment of a fuel injector according to the invention shown in FIG. 1A along the line IB-IB in FIGS. 1A and
- Fig. 2 shows a second embodiment of a fuel injector according to the invention.
- FIG. 1A shows a schematic section through a first exemplary embodiment of a fuel injector 1 designed according to the invention.
- the fuel injection valve 1 comprises an actuator 2, which is preferably designed as a piezoelectric actuator 2.
- the actuator 2 is encapsulated in a sleeve '3 for protection against tensile load.
- the component consisting of the sleeve 3, the actuator 2 and a biasing spring 4 braced in the sleeve 3 against the actuator 2 can be preassembled and then introduced into a housing 5 of the fuel injection valve 1.
- the fully assembled component is fixed in the housing 5 by a support ring 6.
- the actuating element 7 and the sleeve 3 are sealed by means of a corrugated tube seal 8 against the fuel flowing through the fuel injection valve 1.
- a valve needle 10 is non-positively connected to the actuating element 7 and / or is formed in one piece. It extends in the outflow direction into a valve group 11, which can be designed in any manner that meets the requirements for the fuel injector 1.
- a valve closing body 12 is formed on the valve needle 10 and cooperates with a valve seat surface 13 to form a sealing seat.
- the biasing spring 4_ acts on the valve needle 10 against an outflow direction, so that the fuel injector 1 is kept closed when the actuator 2 is not excited.
- the fuel injection valve 1 is designed in the form of an outwardly opening fuel injection valve 1.
- the valve group 11 is located in a nozzle body 14, which is sealed by a seal 15 against a cylinder head, not shown.
- the housing 5 adjoins the nozzle body 14 on the inlet side.
- the fuel injection valve 1 has a pipe 16 arranged parallel to it, which leads the fuel supplied via an inlet 17 to the valve group 11.
- the tube 16 is integrated in the housing 5 of the fuel injector 1. It runs downstream of a filter element 18 arranged in the inlet connection 17 after a first bend 21 parallel to a longitudinal axis 23 of the fuel injector 1 and opens out on the downstream side of the support ring 6 after a second bend 22 through a transverse bore 20 into a Recess 19 of the nozzle body 14.
- the tube 16 is tightly connected to the nozzle body 14, for example soldered or welded.
- the tube 16 is preferably made of steel and has an inner diameter of approximately 3 mm with a wall thickness of approximately 0.4 mm.
- the pipe 16 can be produced in a simple manner and is cheaper than a conventional deep hole, which also places high demands on the wall thickness of the fuel injector 1, which is thereby considerably larger than the fuel injector 1 designed according to the invention.
- FIG. 1B shows a cross section through the fuel injection valve 1 shown in FIG. 1A along the line IB-IB in FIG. 1A.
- the pipe 16, which runs parallel to the fuel injection valve 1 and is integrated in the common housing 5, can be seen on the right-hand side.
- the fuel injector 1 is only slightly thickened due to the attachment of the tube 16 and, in its installed position in the cylinder head of the internal combustion engine, requires only an insignificantly more space than a fuel injector 1 without the tube 16 according to the invention.
- FIG. 2 shows a second exemplary embodiment of a fuel injection valve 1 according to the invention. Components already explained with reference to FIG. 1A are provided with the same reference symbols.
- the tube 16 shown in FIG. 2 is rectilinear over its entire axial length. It is seated on a decentralized inlet connection 17, which is arranged on an axis 24 parallel to the longitudinal axis 23 of the fuel injector 1 is on and runs along its entire axial length axially parallel to the longitudinal axis 23 of the fuel injector 1.
- a transverse bore 20 is again provided, which connects at right angles to the tube 16 and forms the connection to the nozzle body 14.
- the invention is not limited to the exemplary embodiments shown and is also suitable for any other construction of fuel injection valves 1.
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
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2002157895 DE10257895A1 (de) | 2002-12-11 | 2002-12-11 | Brennstoffeinspritzventil |
DE10257895 | 2002-12-11 | ||
PCT/DE2003/002238 WO2004053324A1 (fr) | 2002-12-11 | 2003-07-04 | Soupape d'injection de carburant |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1576279A1 true EP1576279A1 (fr) | 2005-09-21 |
EP1576279B1 EP1576279B1 (fr) | 2010-09-08 |
Family
ID=32336206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03812549A Expired - Lifetime EP1576279B1 (fr) | 2002-12-11 | 2003-07-04 | Soupape d'injection de carburant |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1576279B1 (fr) |
DE (2) | DE10257895A1 (fr) |
WO (1) | WO2004053324A1 (fr) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005042342B4 (de) * | 2005-09-06 | 2009-04-02 | Continental Automotive Gmbh | Einspritzventil mit separater Kraftstoffleitung |
DE102005046666B4 (de) * | 2005-09-29 | 2015-03-26 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE102008056519A1 (de) * | 2008-11-08 | 2010-05-12 | Man Diesel Se | Dichtungssystem |
DE102009055370A1 (de) * | 2009-12-29 | 2011-06-30 | Robert Bosch GmbH, 70469 | Einspritzventil für ein Fluid |
DE102009055362A1 (de) | 2009-12-29 | 2011-06-30 | Robert Bosch GmbH, 70469 | Einspritzventil für ein Fluid |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19540155C2 (de) * | 1995-10-27 | 2000-07-13 | Daimler Chrysler Ag | Servoventil für eine Einspritzdüse |
US6364221B1 (en) * | 1999-09-29 | 2002-04-02 | Siemens Automotive Corporation | Electronic fuel injector actuated by magnetostrictive transduction |
EP1325227B1 (fr) * | 2000-10-11 | 2006-07-05 | Siemens VDO Automotive Corporation | Ensemble compensateur a membrane souple pour injecteur de carburant et procede correspondant |
DE10110678A1 (de) * | 2001-03-06 | 2002-10-02 | Siemens Ag | Dosiervorrichtung |
US6499471B2 (en) * | 2001-06-01 | 2002-12-31 | Siemens Automotive Corporation | Hydraulic compensator for a piezoelectrical fuel injector |
-
2002
- 2002-12-11 DE DE2002157895 patent/DE10257895A1/de not_active Withdrawn
-
2003
- 2003-07-04 EP EP03812549A patent/EP1576279B1/fr not_active Expired - Lifetime
- 2003-07-04 DE DE50313083T patent/DE50313083D1/de not_active Expired - Lifetime
- 2003-07-04 WO PCT/DE2003/002238 patent/WO2004053324A1/fr not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO2004053324A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE50313083D1 (de) | 2010-10-21 |
EP1576279B1 (fr) | 2010-09-08 |
WO2004053324A1 (fr) | 2004-06-24 |
DE10257895A1 (de) | 2004-06-24 |
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