EP2724014A1 - Device for injecting fluid - Google Patents
Device for injecting fluidInfo
- Publication number
- EP2724014A1 EP2724014A1 EP12723464.9A EP12723464A EP2724014A1 EP 2724014 A1 EP2724014 A1 EP 2724014A1 EP 12723464 A EP12723464 A EP 12723464A EP 2724014 A1 EP2724014 A1 EP 2724014A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- fluid
- housing
- piston
- diameter
- 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
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
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/027—Injectors structurally combined with fuel-injection pumps characterised by the pump drive electric
-
- 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
- F02M51/04—Pumps peculiar thereto
-
- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
- F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
- F04B17/042—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow
- F04B17/044—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids the solenoid motor being separated from the fluid flow using solenoids directly actuating the piston
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/16—Rectilinearly-movable armatures
- H01F7/1638—Armatures not entering the winding
Definitions
- Fluid shock wave or shock wave in fluid mechanics refers to a pressure wave generated by explosions or other phenomena, and extreme
- the pressure wave runs as a wavefront through a medium.
- Pressure wave the medium, redistributes itself to compensate for the disturbance and behaves just like an incompressible medium.
- a device for injecting a fluid which has a channel filled with a fluid, in particular a fluid, such as, for example, fuel, which is acted upon by an actuator.
- a fluid such as, for example, fuel
- the geometry of the actuator can be characterized above all by the fact that the diameter of the active surface of the elevation, ie a piston surface ⁇ d 2 Ko iben / 4 at least by a factor of 2 is smaller than the effective area of the plan side of the actuator, ⁇ d 2 Ak tor / 4 ,
- the geometry of the actuator can therefore be characterized by the fact that it corresponds to a hat shape with a cylindrical cup-shaped center, which is dimensioned by a plan side, which forms the "brim” of the hat and the diameter of the "brim” by a factor of 2 greater than that Diameter of the hat final end face, in the present
- Relationship acts as a piston.
- the plan side on which the excitation coil acts can be manufactured from a material with outstanding electromagnetic properties. This material is generally relatively expensive Materials whose strength is limited.
- the elevation, ie the remaining piston can be configured from a more cost-effective but very high-strength material.
- Components of the actuator formed in two parts in this case can be made possible for example by simply sticking on the underside of the piston.
- An increase in the strength, in particular of the piston part of the inventively proposed actuator, can be further achieved by a laterally extending "brim”.
- an improved modular design can be achieved, which makes it possible to vary and in particular gradually increase a pressure pulsation as well as the strength of the shock wave to be generated in the fluid-filled channel.
- the inventively proposed solution the fact is exploited that at constant force, the pressure in a fluid, in particular in a liquid, in relation to the piston surface increases linearly and to the diameter square.
- a pressure pulse can be extended, which has an advantageous effect on the amount of liquid or fluid to be injected.
- the pressure also increases disproportionately with smaller piston mass.
- the actuator force increases in proportion to the area.
- the combination of a small piston surface and a large actuator surface according to the solution proposed by the invention can be exploited to increase the pressure force and produce by means of the principle of surface translation a pressure pulse having a very high amplitude.
- the proposed implementation ie the design of the actuator, pronounced of a hat, the geometry of which, as briefly outlined above, is designed.
- the concrete embodiment of the piston surface ie the active surface, which projects into the channel in the housing of the device for injecting a fluid, in which the liquid is stored, is conceivable in various ways. It is possible to provide the piston surface, ie the front side of the central elevation of the hat-shaped configured actuator, plan or with a rounding.
- the front side may be provided with a concave depression, wherein the end face, be it flat, rounded out, is part of the central elevation of the actuator.
- the lateral surface of the central elevation which represents the actual piston of the actuator, can in Advantageous wise in a guide within the housing of the device for
- the at least one actuator is assigned a disk-shaped magnetic coil as the exciter coil.
- the magnetic coil can be applied to an actuator carrier and comprise a passage opening, wherein the in
- Essentially disc-shaped magnetic coil in the installed state in the actuator or in the housing state substantially, i. extends parallel to the "brim" of the hat-shaped configured actuator
- the at least one actuator moves in the housing in its leadership substantially in the vertical direction and compresses the volume of fluid contained in the channel of the housing, in particular a liquid, for example fuel.
- a liquid for example fuel
- the device proposed according to the invention for injecting a fluid in a stacked arrangement is assigned in each case a separately controllable magnetic coil as an excitation coil.
- Each pair of actuator and excitation coil forms an eddy current actuator in the stack arrangement.
- a good efficiency of the actuators can be achieved. It can generate a pressure pulse with a high amplitude, when choosing a suitable area ratio of actuator area to piston area.
- Ratio is following the solution proposed by the invention following on the basis of the desired pressure pulse amplitude and the available electrical power choose. For the application presented above, it is desirable to choose the diameter ratio of actuator area to piston area greater than 2.
- the proposed solution according to the invention allows flexible possibilities of designing the piston surface and thus influencing the pressure pulse shaping. The design of the leadership of the actuator in the housing minimized to a small diameter
- Effective diameter i. takes place at the piston diameter, which is much cheaper to seal.
- the survey i. the piston part of the inventively proposed, substantially hat-shaped actuator, can be designed with or without brim, with a brim, a higher strength of the piston can be achieved.
- the proposed solution according to the invention is further distinguished by the fact that there is a higher degree of freedom in the design of the hat shape and also a two-part embodiment variant can be considered, in which the materials are selected in each case in terms of strength and in terms of their electromagnetic properties in an optimal manner can.
- Figure 1 is an illustration of the proposed device according to the invention.
- FIG. 2 shows a detailed representation of an actuator
- Figure 3 shows a further embodiment of the substantially hat-shaped
- Figure 4 shows a further embodiment possibility of the actuator with a
- FIG. 5 shows a variant embodiment of the device proposed according to the invention for injecting a fluid with actuators stacked one above the other in a vertical direction in a stack arrangement
- FIG. 1 which shows a device for injecting a fluid, for example a fuel injector for injecting fuel into the combustion chamber of a
- FIG. 1 shows an injection device 10 comprising a housing 12.
- the housing 12 is screwed by means of a cover and comprises an actuator support 16, on whose upper side a substantially disc-shaped magnetic coil 14 is housed.
- the actuator 20 has an actuator surface 22, which can be laterally delimited by a "brim" of the hat-shaped configured actuator, as well a piston of the actuator 20 forming a central elevation.
- the end face of this central elevation of the actuator 20 represents a piston surface 24, which projects into a channel 28.
- the channel 28 may - as shown in Figure 1 - have a in the conveying direction 30 of the liquid, or the fluid, continuously tapered cross section, indicated by reference numeral 32 in Figure 1.
- a valve 34 At the end of the channel 28, with a fluid, or with the Liquid 26 is filled, there is a valve 34, through which the liquid in the conveying direction 30 emerges from the channel 28 and, for example, in a combustion chamber, not shown here
- Internal combustion engine can be injected.
- FIG. 1 shows that the actuator 20, which has a substantially hat-shaped design, is guided in a guide 36 of the housing 12.
- the guide 36 is given by the limitation of the channel 28 in the housing 12.
- the actuator 20 shown here is embedded in a cavity 18 of the housing 12. With appropriate energization of the substantially parallel to the plane surface, i. To the brim of the actuator 20 extending magnetic coil 14, which serves as an excitation coil, the actuator 20 moves in the cavity 18 substantially in the vertical direction, so that as
- Piston surface 24 acting end face of the actuator 20 enters the channel 28 of the housing 12 and compresses the volume of liquid contained there accordingly.
- FIG. 2 shows a first embodiment of the inventively proposed substantially hutformig designed actuator.
- the actuator 20 which has a substantially hat-shaped design, comprises an area serving as a piston, the end face of which forms the piston surface 24.
- This piston surface 24 is arranged in a diameter 40 d Ko iben.
- the substantially hatformig procured actuator 20 with a plane surface 46 provided which has a diameter 42 d A ktor.
- Diameter 42 d A constru the diameter 40 of the piston surface 24 of the central elevation of the actuator 20 by at least two times.
- FIG. 2 also shows that the central elevation in the
- Essentially hutformig procured actuator 20 is configured in a height 44.
- the design of the height 44 determines on the one hand the distance of the piston surface 24 from the flat surface 46 and on the other hand, the guide length in which the central elevation of the substantially hutformig procured actuator 20 in the guide 36 in the housing 12 of the inventions proposed injector 10 is performed.
- the guidance of the substantially hutformig procured actor in its diameter 40 d Ko iben advantageous in terms of low friction and lower production-related adjusting leakage losses.
- the disk-shaped magnetic coil 24 extends essentially parallel to the plane surface 46 of the actuator and extends. Both components extend substantially parallel to one another, forming a gap between them.
- FIG. 2 further comprises the substantially disk-shaped magnetic coil 14, which serves as an exciter coil, and an opening 38, which lies substantially below the central elevation of the actuator 20, which is essentially hat-shaped.
- FIG. 3 shows a further possible embodiment of the actuator proposed according to the invention and essentially hat-shaped.
- the plan side of the central elevation in the hat-shaped actuator 20 is not planed but rounded.
- FIG. 3 shows that a trough 52 which runs concavely here forms on the end face of the central elevation in the substantially hat-shaped actuator 20.
- a concave depression 52 it is also possible, instead of a concave depression 52, to provide the plan side of the central elevation of the substantially hat-shaped actuator with a convex curvature.
- an embodiment of the plan side of the central elevation, which serves as a piston conceivable with a concave or convex curved surface.
- FIG. 4 shows a further possible embodiment of the essentially hat-shaped actuator for an injection device.
- Figure 4 shows that, according to this embodiment, the diameter 40 d Ko Iben identical to that shown in FIGS 2 and 3.
- FIG. In contrast to this, however, the central elevation has a constriction 54. This also acts as a guide 36.
- either the central elevation of the actuator 20, ie the piston member or the channel 28 and the housing 12 can be made in two or more parts, which considerably simplifies the assembly.
- the diameter 42 of the flat surface 46 is dimensioned considerably larger than the diameter 40 d Ko iben, which represents the active surface of the actuator.
- FIG. 5 shows a variant of the device proposed according to the invention for injecting a fluid with a stack arrangement of actuators.
- a number of substantially hat-shaped actuators 20 are stacked in stack 56 received one above the other.
- Each of the individual actuators is assigned a separate magnetic coil 14.
- a pair of actuator 20 and magnetic coil 14 forms a Wirbelstromaktor.
- each piston ie each centric elevation substantially hat-shaped actuator 20 is associated with a magnetic coil 14, so that in the stack assembly 56 as shown in Figure 5, four eddy current actuators are coupled together.
- inventively proposed injection device 10 can be a good
- Control variants Due to the flexible use in terms of the number of actuators 20 and the provision of magnetic coils 14 per actuator different shaping of a pressure pulse is possible.
- Figures 6.1, 6.2 and 6.3 show schematically different pressure pulse profiles, which can be achieved with the inventively proposed device for injecting a fluid.
- Figure 6.1 shows a sawtooth
- a third pressure curve 76 is shown, which is characterized by a rising flank 78 and a continuously falling waste flank 80. On the rising edge 78, individual plateaus can be distinguished, each of which, starting from a new pressure build-up.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Power Engineering (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201110078068 DE102011078068A1 (en) | 2011-06-24 | 2011-06-24 | Device for injecting fluid |
PCT/EP2012/059589 WO2012175272A1 (en) | 2011-06-24 | 2012-05-23 | Device for injecting fluid |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2724014A1 true EP2724014A1 (en) | 2014-04-30 |
EP2724014B1 EP2724014B1 (en) | 2016-09-14 |
Family
ID=46149454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12723464.9A Not-in-force EP2724014B1 (en) | 2011-06-24 | 2012-05-23 | Device for injecting a fluid |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2724014B1 (en) |
DE (1) | DE102011078068A1 (en) |
WO (1) | WO2012175272A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103716116B (en) | 2012-09-28 | 2019-04-16 | 中兴通讯股份有限公司 | Configuration method, base station and the terminal of information feedback signaling |
DE102015223540A1 (en) | 2015-11-27 | 2017-06-01 | Robert Bosch Gmbh | 3D printer with printhead without moving parts |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2419425A1 (en) * | 1974-04-23 | 1975-11-06 | Daimler Benz Ag | Compression ignition engine combined fuel pump-injector - has electromagnetically operated piston in pump cylinder with injector valve opening in flow direction |
JPS5618061A (en) * | 1979-07-20 | 1981-02-20 | Lucas Industries Ltd | Fuel injection system |
DE102006003484A1 (en) * | 2005-03-16 | 2006-09-21 | Robert Bosch Gmbh | Device for injecting fuel |
-
2011
- 2011-06-24 DE DE201110078068 patent/DE102011078068A1/en not_active Withdrawn
-
2012
- 2012-05-23 WO PCT/EP2012/059589 patent/WO2012175272A1/en active Application Filing
- 2012-05-23 EP EP12723464.9A patent/EP2724014B1/en not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2012175272A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102011078068A1 (en) | 2012-12-27 |
WO2012175272A1 (en) | 2012-12-27 |
EP2724014B1 (en) | 2016-09-14 |
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