EP3111078A1 - Fluidinjektor - Google Patents
FluidinjektorInfo
- Publication number
- EP3111078A1 EP3111078A1 EP15703491.9A EP15703491A EP3111078A1 EP 3111078 A1 EP3111078 A1 EP 3111078A1 EP 15703491 A EP15703491 A EP 15703491A EP 3111078 A1 EP3111078 A1 EP 3111078A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- injector
- actuator
- pressure
- fluid injector
- 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
- 239000012530 fluid Substances 0.000 title claims abstract description 65
- 239000002520 smart material Substances 0.000 claims abstract description 12
- 229920001746 electroactive polymer Polymers 0.000 claims abstract description 11
- 229920001971 elastomer Polymers 0.000 claims abstract description 8
- 239000000806 elastomer Substances 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims description 30
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229920002595 Dielectric elastomer Polymers 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- 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
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
-
- 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
- F02M63/0012—Valves
- F02M63/0059—Arrangements of valve actuators
- F02M63/0063—Two or more actuators acting on a single valve body
Definitions
- the invention relates to a fluid injector with an electromagnetic
- Actuating actuator comprising an injector, in which a Injektornadel is arranged longitudinally movable, the Injektornadel having a nozzle orifices commanding nozzle tip and a cooperating with the Injektornadel armature of the Betloch Trentsaktors.
- Such a fluid injector is known from DE 10 2011 076 663 AI.
- This fluid injector is a fuel injector for injecting fuel into a combustion chamber of an internal combustion engine having an injector needle which is guided in a high-pressure bore of an injector for releasing and closing at least one injection port in a liftable manner.
- This fluid injector has a first electromagnetic actuation actuator, which the
- the fluid injector has a second electromagnetic actuation actuator which is arranged opposite the first actuation actuator and an armature plate and which, when energized, moves the armature plate connected to the injector needle to an injector needle spring to close the at least one nozzle opening.
- a similar fluid injector is known from DE 10 2008 001 895 AI.
- This fluid injector has two pairs of actuation actuators, one pair of the electromagnetic actuation actuators each being provided for opening and closing the injector needle.
- the accommodation of the four electromagnetic actuators requires considerable space.
- the invention has for its object to provide a fluid injector, which is improved in terms of its dynamic operation and the absorption of electrical energy.
- an additional control actuator for a fluid is provided and that the fluid is introduced into a cooperating with the Injektornadel pressure chamber for controlling a movement of the Injektornadel.
- the fluid to be injected by the fluid injector is under a pressure and this fluid pressure acts on the injector needle via the pressure chamber, controlled by the control actuator.
- This makes it possible to influence the opening movement and / or the closing movement of the injector needle in such a way that it takes place in particular faster and, if necessary, more precisely. This improves the overall dynamic behavior of the fluid injector. Since the control actuator only controls the flow of the fluid, a significantly lower electrical energy is required for operating the control actuator than for a second electromagnetic actuation actuator. Since the tax factor the
- Actuating actuator supported the actuation actuator can also be designed smaller and with a lower power consumption. As a result, overall the electrical energy for actuating the fluid injector can be reduced.
- control actuator is arranged in the injector housing. Since the control of the fluid flow controlling actuator can be designed considerably smaller than the Betjansaktor, this is easily in the
- control actuator between the actuating actuator and the nozzle tip is arranged.
- This arrangement has proved to be particularly advantageous, since on the one hand in this area a flow line of the fluid injector to be injected fluid is present, can be derived from a control actuator dominated and acting on the Injektornadel branch, and on the other hand, the control actuator in this area due to its Small size is easy to integrate.
- the control actuator is a microactuator, in particular a (hollow shaft) Smart Material Linear Actuator (SM LA).
- SM LA Smart Material Linear Actuator
- Such a microactuator or smart material linear actuator is available in various designs and is characterized by its small size and low absorption of electrical energy.
- Such a smart material linear actuator belongs to the category of microactuators, which have a shape memory.
- the microactuator in particular based on an electroactive polymer (EAP) or dielectric elastomer or on a
- M RE magnetorheological elastomer
- Actuators based on these principles have the ability either to convert electrical energy directly into mechanical energy or to greatly alter its stiffness. Furthermore, in contrast to piezoelectric ceramics, which can basically also be used, these microactuators have much higher deformation properties and a lower weight. This results in a significantly higher representable energy density.
- a design of the microactuator based on an electroactive polymer is a so-called role actuator, which can thus be designed as a hollow shaft micro-actuator. This design can be used particularly well, since such an actuator can be easily installed surrounding the Injektornadel in the injector.
- Magnetorheological elastomer based microactuator is usually made of an elastomer matrix with dispersed magnetically active particles.
- viscoelastic or dynamic mechanical properties can be changed rapidly and reversibly by applying an external magnetic field, for example by energizing a field exciter coil.
- Such elastomers can be used according to the invention particularly meaningful, since they have a very good dynamic behavior.
- the control actuator controls a flow connection of a high-pressure line of the fluid via the pressure chamber to a low-pressure line.
- the fluid to be injected by the fluid injector is supplied under pressure, preferably under high pressure, to the fluid injector and a branch line of the fluid branching from the high pressure line of the fluid injector is led via the pressure chamber to the control actuator, which establishes a fluid connection between the branch line and a low-pressure railway mastered.
- a low-pressure line is also already present in the fluid injector and serves to remove leakage fluid. As a result, the structural complexity for introducing flow lines into the fluid injector is low.
- the high-pressure line is connected via the branch line with a high-pressure compensation chamber forming the pressure chamber, the high-pressure compensation chamber being connected to a stepped shoulder
- the high pressure compensation chamber may be disposed relative to the step shoulder such that either opening or closing movement of the injector needle is facilitated or assisted by lowering the fluid pressure in the high pressure compensation chamber.
- a high-pressure compensation chamber is arranged on each side, which is controlled in each case by its own control actuator. This makes it possible, both the opening movement and the closing movement of the
- the stepped shoulder between the nozzle tip and the Hochdruckkompensationshunt is arranged. This is the preferred embodiment and in this is by a pressure reduction in the
- High pressure compensation chamber relieves the injector needle and the activation by the electromagnetic actuator actuator can be accelerated. Conversely, when the pressure in the high-pressure compensation chamber is increased to the prevailing high-pressure in the high-pressure line, the injector needle is subjected to a longer load and the opening time of the fluid injector becomes shorter and less
- Fluid can be injected via the at least one nozzle opening. Accordingly, the closing time of the injector needle can be shortened.
- the fluid injector is a fuel injector and the fluid is fuel.
- the fluid injector can basically any injector for
- Injizierung be any fluid, but the application of the embodiment of the invention is particularly advantageous in a fuel injector possible.
- the size of such trained fuel injector can be significantly reduced and also the recording of electrical energy for precise control of the fuel injector is compared to a conventional reduced trained fuel injector.
- an accurate electrically controlled hydraulic servo function of the fuel injector is realized, which leads to a better dynamic behavior.
- Figure 1 shows a longitudinal section through an inventively designed
- FIG. 2a, 2b shows a longitudinal section through a fluid injector in the region of a first embodiment of a Steueraktors in its open Posi tion and thereby enabled flow flow
- 3a, 3b shows a longitudinal section through a fluid injector in the region of a first embodiment of a control actuator in its closed position and a flow flow shut off thereby
- 4a, 4b shows a longitudinal section through a fluid injector in the region of a second embodiment of a Steueraktors in its open position and thereby enabled flow flow and
- 5a, 5b show a longitudinal section through a fluid injector in the region of a second embodiment of a control actuator in its closed position and a flow flow shut off thereby.
- FIG. 1 shows a longitudinal section through a fluid injector in the form of a fuel injector 1.
- This fuel injector is part of a fuel injection system of an internal combustion engine designed in particular as a common rail injection system.
- the fuel injection system has a tank from which a low-pressure fuel pump supplies fuel via at least one filter device to a high-pressure fuel pump, which conveys the supplied fuel into a high-pressure accumulator. From this high-pressure accumulator remove one or more fuel injectors 1 there under a pressure of up to 3000 bar stored fuel for injection into the associated combustion chambers of an internal combustion engine.
- the fuel injector 1 has, as housing parts, an injector housing 2, a control actuator body 21 and an injector needle body 3. Of the
- Injector needle body 3 is screwed liquid-tight by means of a clamping nut 4 with the interposition of the Steueraktor stressess with the injector 2.
- a guide bore 5 is inserted for an injector needle 6, wherein the guide bore 5 continues in the Steueraktor competence 21 and in the Injektorgeophuse 2 as a in the Injektorgeophuse
- the injector needle 6 has an end nozzle tip 8, which preferably closes or releases a plurality of nozzle openings 9 at the end region of the injector needle body 3 facing away from the injector housing. If the nozzle openings 9 are released from the injector needle, fuel injected into the injector housing 2, the control actuator body 21 and the injector needle body 3 is injected into an associated combustion chamber of the internal combustion engine through the nozzle openings 9.
- the fuel supplied via the high-pressure line 10 is guided into a high-pressure annulus 11 in the injector needle body 3 which has an annular space between the injector needle body 3 and the injector needle 6 or via flow channels in the injector needle body 3 and / or the injector needle 6 with a space in the Area of the nozzle body tip of the injector needle body 3 is bound.
- This space in the nozzle body tip is shut off with closed and the nozzle openings 9 shut-off position of the nozzle tip 8 of the Injektornadel 6 relative to the nozzle openings 9, while after an axial adjustment of the Injektornadel 6 away from the nozzle openings 9, the flow connection between the space and the nozzle openings 9 is released ,
- the axial adjustment of the Injektornadel 3 is first made by a conventional electromagnetic actuator actuator 12 having a coil 13.
- the coil 13 has connection lines 14a, 14b, which are connected to a control unit 15.
- the coil 13 can be energized via the connecting lines 14a, 14b or not.
- a magnetic field is built up which axially attracts an armature 17 connected to the injector needle 6 in the form of an armature disk in the direction of the coil 13.
- the nozzle tip 8 is moved away from the nozzle openings 9 against the effective force of an injector needle spring 18 from the nozzle openings 9 into an injection position.
- the Injektornadelfeder 18 is based on one with the
- Injector 2 cooperating spring washer 19 and connected to the Injektornadel 6 needle wheel 20 from. If the energization of the coil 13 is canceled, the magnetic field collapses and the
- Injektornadelfeder 18 pushes the Injektornadel 6 in its closed position in which the nozzle openings 9 are closed.
- Injektornadelisson 3 arranged, in which a control actuator 22 is installed.
- the control actuator 22 is explained in more detail in the following figures and also has connection lines 14 c, 14 d, which also connect the control actuator 22 to the control unit 15.
- the control actuator 22 opens or closes a flow connection between a branched from the high pressure line 10 branch line 23 a, 23 b to a low pressure line 24.
- the low pressure line 24 is suitably connected, for example, with the tank of the fuel system.
- a pressure space designed as a high-pressure compensation chamber 25 is arranged, wherein the high-pressure compensation chamber 25 adjoins a stepped shoulder 26 on the injector needle 6.
- Control actuator 2 is likewise set in the enlarged longitudinal section shown in FIG. 2a by the control actuator 22 and the injector needle 6 reproduced in sections as well as not to scale.
- the control actuator 22 has a clock-shaped Steueraktorgephaseuse 27, which is inserted into the Steueraktor stresses 21 ( Figure 1).
- the control actuator housing 27 has an access opening 28 into which the branch line 23b opens.
- the inlet opening 28 is connected via a throttle point 29 which may be provided additionally or alternatively to the throttle in the branch line 23a, with a sickle-shaped high-pressure chamber 30 (see also Figure 2b).
- the high-pressure chamber 30 is shown in FIG. 2 a via a flow space 31 in the control actuator housing 27 with a likewise sickle-shaped low-pressure chamber 32 in the FIG
- the crescent-shaped low-pressure chamber 32 is connected to the low-pressure line 24 via a low-pressure passage 33.
- a Steueraktorkolben 34 is arranged longitudinally movable.
- the inner wall of the Steueraktorgephaseuses 27 forms the guide for the outer peripheral wall of the Steueraktorkolbens 34.
- the control actuator 22 centrally penetrating Injektornadel 6 is an air gap or alternatively a sliding bearing of the Steueraktorkolbens 34.
- the Steueraktorkolben 34 is in the position shown by a Steueraktorfeder 35 after pressed right toward the Betrelinsaktor 12. In FIG. 2a, the flow Connection 36 ( Figure 2b) through the flow space 31 to the low-pressure chamber 32 released.
- the Steueraktorkolben 34 has an annular recess 37, in which a microactuator in the form of a (hollow shaft) Smart Material Linear Actuator (SM LA) 38a, based on an electroactive polymer (EAP) is installed.
- the hollow shaft Smart Material Linear Actuator 38a is not activated.
- the hollow shaft Smart Material Linear Actuator 38a is supported on an inner piston bottom of the Steueraktorkolbens 34 and the Injektorgepatuse 2 ( Figure 1) or arranged between the Steueraktorgeophen 27 and the Steueraktorkolben 34 cup-shaped element 39.
- the pot-shaped element 39 is movable relative to the Steueraktorkolben 34 and both components include the hollow shaft Smart Material Linear actuator 38 a.
- the control actuator 22 by a structure with two complementary bearings / sub-housings, in particular in the form of Steueraktorkolbens 34 compensate for the disadvantage of EAP material (constant volume in its operation).
- the hollow shaft Smart Material Linear Actuator 38a When the hollow shaft Smart Material Linear Actuator 38a is energized, it deforms as shown in FIG. 3a and displaces the control actuator piston 34 in relation to the cup-shaped element 39 into the illustrated position. Thereby, the flow communication 36 is inhibited by the flow space 31 from the high-pressure chamber 30 to the low-pressure chamber 32, and consequently, the fuel pressure in the high-pressure compensation chamber 25 increases to the pressure prevailing in the high-pressure line 10.
- FIG. 3b the interruption of the flow connection 36 between the high-pressure chamber 30 and the low-pressure chamber 32 is illustrated.
- a (hollow-shaft) smart material linear actuator SMLA) 38b based on a magnetorheological elastomer (MRE) is used instead of the (hollow-shaft) smart material linear actuator 38a based on an electroactive polymer.
- a (hollow-shaft) smart material linear actuator SMLA) 38b based on a magnetorheological elastomer (MRE) is used instead of the (hollow-shaft) smart material linear actuator 38a based on an electroactive polymer.
- SMLA magnetorheological elastomer
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014203640.2A DE102014203640A1 (de) | 2014-02-28 | 2014-02-28 | Fluidinjektor |
PCT/EP2015/051487 WO2015128136A1 (de) | 2014-02-28 | 2015-01-26 | Fluidinjektor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3111078A1 true EP3111078A1 (de) | 2017-01-04 |
EP3111078B1 EP3111078B1 (de) | 2020-04-22 |
Family
ID=52464342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15703491.9A Active EP3111078B1 (de) | 2014-02-28 | 2015-01-26 | Fluidinjektor |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3111078B1 (de) |
DE (1) | DE102014203640A1 (de) |
WO (1) | WO2015128136A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016103661A1 (de) * | 2016-03-01 | 2017-09-07 | Khs Gmbh | Aktuator zur Steuerung der Fluidwege einer Befüllungseinheit für eine Getränkeabfüllanlage, Befüllungseinheit für eine Getränkeabfüllanlage sowie Getränkeabfüllanlage |
DE102017116383A1 (de) * | 2017-07-20 | 2019-01-24 | Liebherr-Components Deggendorf Gmbh | Injektor zum Einspritzen von Krafstoff |
DE102021204811B4 (de) | 2021-05-12 | 2023-05-04 | Zf Friedrichshafen Ag | Akuator mit rheologischer Kupplung |
DE102021123656A1 (de) | 2021-09-13 | 2023-03-16 | Universität des Saarlandes, Körperschaft des öffentlichen Rechts | Implantat zur fixierung und genesungsunterstützung von knochenfrakturen |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5984258A (en) * | 1998-09-28 | 1999-11-16 | General Motors Corporation | Method and apparatus for control of a shape memory alloy actuator for a fuel injector |
US20070235554A1 (en) * | 2006-03-29 | 2007-10-11 | Williams Arthur R | Dual stroke injector using SMA |
EP1860317A1 (de) * | 2006-05-23 | 2007-11-28 | Keihin Corporation | Brennstoffeinspritzvorrichtung, Brennstoffeinspritzkontrollvorrichtung und Kontrollverfahren für die Brennstoffeinspritzvorrichtung |
US20090250021A1 (en) * | 2007-10-02 | 2009-10-08 | Artificial Muscle, Inc. | Fluid control systems employing compliant electroactive materials |
DE102008000702A1 (de) * | 2008-03-17 | 2009-09-24 | Robert Bosch Gmbh | Injektor |
DE102008001895A1 (de) | 2008-05-21 | 2009-11-26 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
EP2273097B1 (de) * | 2009-06-15 | 2011-12-14 | Delphi Technologies Holding S.à.r.l. | Kraftstoffeinspritzdüse |
DE102011076663A1 (de) | 2011-05-30 | 2012-12-06 | Robert Bosch Gmbh | Kraftstoffinjektor |
CA2780864C (en) * | 2012-06-21 | 2013-09-24 | Westport Power Inc. | Fuel injection valve and method of actuating |
-
2014
- 2014-02-28 DE DE102014203640.2A patent/DE102014203640A1/de not_active Withdrawn
-
2015
- 2015-01-26 WO PCT/EP2015/051487 patent/WO2015128136A1/de active Application Filing
- 2015-01-26 EP EP15703491.9A patent/EP3111078B1/de active Active
Also Published As
Publication number | Publication date |
---|---|
WO2015128136A1 (de) | 2015-09-03 |
DE102014203640A1 (de) | 2015-09-03 |
EP3111078B1 (de) | 2020-04-22 |
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