EP2580462A1 - Einspritzventil mit direkt- und servoantrieb - Google Patents
Einspritzventil mit direkt- und servoantriebInfo
- Publication number
- EP2580462A1 EP2580462A1 EP11724213.1A EP11724213A EP2580462A1 EP 2580462 A1 EP2580462 A1 EP 2580462A1 EP 11724213 A EP11724213 A EP 11724213A EP 2580462 A1 EP2580462 A1 EP 2580462A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- drive component
- needle
- valve device
- deflection
- 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 description 53
- 239000007924 injection Substances 0.000 title claims description 53
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000000446 fuel Substances 0.000 claims description 23
- 230000004913 activation Effects 0.000 claims description 22
- 238000002485 combustion reaction Methods 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 20
- 230000009347 mechanical transmission Effects 0.000 claims description 9
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 2
- 229910052729 chemical element Inorganic materials 0.000 claims 1
- 230000001050 lubricating effect Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 101100033673 Mus musculus Ren1 gene Proteins 0.000 description 1
- 101150106653 Ren1 gene Proteins 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000011144 upstream manufacturing 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
- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
-
- 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
- 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
- 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
- F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
- F02M63/0005—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using valves actuated by fluid 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
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid 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
- 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
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
-
- 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
- F02M63/0028—Valves characterised by the valve actuating means 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
- 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
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0043—Two-way valves
-
- 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
- F02M2200/701—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical
- F02M2200/702—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger mechanical with actuator and actuated element moving in different directions, e.g. in opposite directions
Definitions
- the invention relates to a valve device for conveying lubricating and non-lubricating liquids, in particular for use in the field of fuel injection in an internal combustion engine.
- the valve device has a two-stage drive device which comprises both an electric direct drive and a hydraulic servo drive.
- the servo drive can be switched on in addition to the direct drive, if a larger valve needle stroke is needed.
- Valve devices are used to convey or distribute a wide variety of liquids.
- Such valve devices may for example be designed as so-called injectors, in which the opening of an injection nozzle is controlled very precisely by means of a valve needle.
- Mi ⁇ t a modern injector can thus be portioned even the smallest amounts of liquid exactly.
- This accuracy is needed, for example, in internal combustion engines, where fuel is injected under high pressure into the combustion chamber by means of corresponding fuel injectors.
- the fuel supply must be carried out in exactly specified conditions and at predetermined times.
- the fuel injection valve of a modern internal combustion engine generally performs multiple injections, wherein the amount of fuel used is varied depending on the injection phase.
- relatively small amounts of fuel are injected for ⁇ pilot typically, while relatively large amounts of fuel be transported into the combustion chamber in the main injection.
- the range of fuel required in each phase of fuel injection in an internal combustion engine quantity constitutes an important criterion in the construction of a suitable injection valve.
- the drive device provided for moving the valve needle must be sufficiently large to ensure the maximum needle lift required during the main injection.
- the valve needle must also be suffi ⁇ accordingly fast and precise control to allow optimum injection of small or very small amounts of fuel during the pilot injection.
- a drive device typically used for the deflection of the valve needle therefore has an electric drive means, such.
- the actuator operates as a direct drive, wherein the valve needle UNMIT ⁇ telbar the deflection or expansion of the actuator is following deflected from its closed position due to a mechanical contact with components of the drive. Therefore, the direct drive enables particularly fast switching times and precise controllability, especially in combination with a closed-loop
- the switchable ⁇ way is limited to the maximum deflection of the actuator.
- these are only about 60 to 70 microns.
- such a small needle stroke is unfavorable to promote larger quantities of liquid.
- a more elaborate structure of Di ⁇ rektantriebs is necessary, which is reflected among other things in height ⁇ ren manufacturing costs.
- hydraulic drive devices can also be used. In the drive concept sem ⁇ a deflection of the valve needle is evidence ER causing hydraulic force by utilizing different pressure conditions within the valve device.
- the drive device comprises an electric drive component, which causes a direct deflection of the valve needle and ei ⁇ ne hydraulic drive component, which is activated in addition to the electric drive component and causes a ballistic ⁇ cal deflection of the valve needle.
- the direct drive can be combined with a closed-loop control, which can increase the accuracy of valve needle control.
- the hydraulic drive component is a rela ⁇ tively large displacement of the valve needle and thus the Einsprit ⁇ Zung larger quantities of liquid, such as during the main injection phase can be achieved.
- the combination of Both drive concepts also go hand in hand with a reduction of the manufacturing costs, since only a shorter piezostack is needed.
- the drive device is designed to effect the activation of the hydraulic drive component by the electric drive component. In this way, an automatic ⁇ specific activation of the hydraulic drive enables component is light. Since, in this case, the two operating modes, namely "pure electrical operation" and “mixed operation", are controlled only with the aid of the means used to control the electric drive component, a simplified and therefore also cost-effective design is thus made possible.
- the hydraulic drive component is designed as a servo valve, which connects the valve needle chamber with a low-pressure channel, wherein the servo valve comprises a valve element, which is transferred by the deflection of the electric drive component from a closed position to an open position.
- servo valves allow a rela ⁇ tively large needle stroke.
- the direct activation of Ventilele- ment by the deflection of the electric drive component allows the realization of a particularly simple automatic ⁇ tables activation of the hydraulic drive component.
- a further embodiment provides that the displacement of the electric drive component only after overcoming an activation threshold leads to an activation of the hydraulic devices ⁇ rule drive component, wherein the Aktiv istsschwel ⁇ le is determined by a tolerance in the mechanical transmission path from the electric drive component to the valve element.
- the mechanical transmission path from the electric ant ⁇ riebskomponente to the valve element comprises at least one mechanical transmission element, by means of which the deflection of the electric drive component is transmitted to the valve element of the hydraulic drive component.
- a further embodiment provides that the Kochtra ⁇ restriction member is pin-shaped. This allows a direct and therefore simple transmission the movement of the electric drive to the valve element.
- a further embodiment provides that the mechanical transmission line a hebeiförmiges transmission member ⁇ construed that be ⁇ is actuated by the pin-shaped transmission element.
- the deflection of the electric drive component can be arbitrarily converted into a movement for activation of the valve element.
- the direction of movement can be reversed, so that the valve element is opened counter to the deflection direction of the electric drive component.
- a further embodiment provides that a tolerance is provided between the two transmission elements, which allows a deflection of the valve needle by a predetermined Stre ⁇ bridge without an activation of the hydraulic drive component takes place.
- a tolerance is provided between the two transmission elements, which allows a deflection of the valve needle by a predetermined Stre ⁇ bridge without an activation of the hydraulic drive component takes place.
- the electric drive component comprises a piezoelectric element, which causes the desired deflection when applying ei ⁇ ner electrical voltage.
- piezoelectric elements have a fast response, making them ideal for use for precise control of the valve needle, in particular in combination with a geeig ⁇ Neten control. This is particularly advantageous when injecting the smallest amounts of liquid. Furthermore, piezoelectric elements can be produced relatively inexpensively.
- the electric drive component by means of a closed-loop
- valve device is ⁇ forms as an injection valve for injecting fuel into a combustion chamber of an internal combustion engine. Due to the combined properties of the two drive systems according to the invention Ventilvorrich ⁇ processing is particularly suited for the pilot injection and the
- FIG. 1 shows a valve device designed as an injection valve with a drive device according to the invention
- FIG. 2 shows the drive device of the injection valve device from FIG. 1 in the rest position;
- FIG. 2 shows the drive device from FIG. 2 with a valve needle slightly deflected by means of direct drive,
- FIG. 4 shows the drive device from FIGS. 2 and 3 in servo operation with a valve needle in ballistic flight,
- Fig. 5 is a timing diagram in which an example of an injection process of the injection valve according to the invention with pre and main injection is shown.
- FIG. 1 shows a valve device 100 according to the invention for conveying lubricating and non-lubricating liquids.
- the valve device shown here is preferably a fuel injection valve for an internal combustion engine of a motor vehicle.
- the injection valve 100 comprises a housing 110.
- the generally multi-part on ⁇ built housing comprises an upper and a lower housing ⁇ seteil 111, 112, wherein the distribution of the housing may vary depending on the application.
- the valve device 100 further comprises a valve needle 120 arranged in a valve needle chamber 113 in the interior of the housing 110.
- the valve needle 120 controls an injection nozzle (not shown here) provided in the lower part of the housing 110, through which high-pressure fuel is discharged into the combustion chamber ,
- the supply of the fuel takes place via a passage extending in the Ge ⁇ housing 110 high pressure passage 116th
- the valve pin 120 is movable in the axial direction STORED and typically comprises a shaft-shaped From ⁇ cut 121 is formed at its lower end serving as a closing element for the opening of the injection valve needle tip ⁇ 125th
- the valve needle 120 is typically by means of spring force into its valve seat supported ⁇ th.
- a helical compression spring 130 is provided in the present example, the undergeb- in a plane formed by a portion of the valve needle chamber 113. Spring chamber 150 is revenge.
- the pressure spring 130 attached to a collar-shaped valve needle part 124 exerts a downward pressure on the valve needle 120. To open the injection valve, the valve needle 120 is therefore deflected against the spring force of the compression spring 130 upwards.
- an ant ⁇ riebs worn 200 is provided, which is preferably integrated in the housing 110 of the valve device 100.
- the drive ⁇ device 200 includes an electric drive component 210, which serves as a direct drive.
- any suitable electrically operated actuator in question by means of electrical signals, such as. B. current or voltage ⁇ pulses, is controlled.
- actuators which frequently consist of piezoelectric materials are used in injection valves, in which a change in the electrical voltage applied thereto leads to an expansion or contraction.
- Such piezo actuators are typically manufactured as a so-called piezo zostacks one above the other of several be arrange ⁇ th piezoelectric layers are formed. Furthermore, electromagnetic actuators are used in which the desired deflection is effected by applying corresponding current pulses.
- the electric drive component is formed by a piezo stack 210.
- the piezo stack 210 accommodated in an inner housing chamber has a cylindrical shape and has a central bore 211 for receiving the shaft-shaped part 121 of the valve needle 120.
- the piezoelectric stack 210 does not fill the interior case chamber completely, whereby a pressure chamber 114 for receiving a Tel ⁇ ler Modell the valve needle 120 is formed above the piezoelectric stack 210 121st
- the Tel ⁇ ler Modell 121 thereby forms the upper end of the valve ⁇ needle 120 and is connected to the shaft-shaped valve needle part 121 which extends within the bore 211.
- a disc-shaped ring member 212 On the cylindrical piezo stack 210 is a disc-shaped ring member 212, which serves to support the Ventilnadeltel ⁇ lers 121.
- the valve needle plate 122 When the piezo stack 210 is expanded, the valve needle plate 122 is moved away from the annular ring arranged underneath. ment 212 entrained, whereby the valve needle 120 deflected against the force of the compression spring 130 and the nozzle opening is released. Due to the mechanical contact between piezo stack 210, ring element 212 and valve needle plate 122 during deflection, the valve needle 120 reacts un ⁇ indirectly on the movement of the piezo stack 210.
- the driving device according to the invention 200 has to ⁇ additionally also includes a hydraulic drive 220, 117 connecting the servo valve is designed in the present case as a the pressure chamber 114 with a low pressure channel.
- Servo valve 220 comprises a conical valve element 221 which closes a likewise conically shaped valve opening in the upper ceiling element of pressure chamber 114.
- To open the servo valve 220 is a arranged in a side chamber 118 of the low pressure passage 117 arcuate He ⁇ belelement 223, which attaches to the valve element 221 and is operated by ⁇ means of a pin-shaped transmission element 213.
- the pin-shaped transmission element 213 is arranged guided in a bore of the upper ceiling element of the pressure chamber 114 and lies with its lower end on the Ringele ⁇ ment 212. To this end, the valve needle 120 is seen with a corresponding opening genü ⁇ quietly tolerance for pin-shaped transmission element 213 in the upstream plate-shaped closure element 122nd
- the two transmission elements 213, 223 are preferably designed so that they do not touch each other in the closed state of the valve device 200 and thus the operation of the arcuate transmission element 223 takes place only after overcoming a distance given by their distance 214.
- FIG. 2 shows a section of the drive device 200 from FIG. 1.
- the plate-shaped closing element 122 of the valve needle 120 does not rest directly on the ring element 212. Rather, both elements are separated by a small gap, by which a so-called idle stroke is defined. Only after overcoming the idle stroke, the two elements come into contact with each other (not shown here).
- FIG. 2 illustrates the starting situation in which the valve needle 120 is pressed into the valve seat with the force of the compression spring 130 and consequently keeps the injection nozzle closed.
- the piezoelectric actuator 210 expands in the direction of the valve needle plate 122. After overcoming the Leerhubs the valve needle plate 122 is taken from the ring member 212, resulting in a deflection of the valve needle 120 from its rest position. A corresponding situation is shown in FIG.
- valve needle is pushed back by the compression spring 130 in the direction of the valve opening and the injection valve is closed again.
- This process can be influenced by premature closing of the servo valve 220, which can be effected by a corresponding contraction of the piezo stack 210.
- the valve member is pressed 221,114 and low pressure channel 117 ruling from the interim rule ⁇ pressure chamber pressure difference back into his seat, whereby the pressure drop across the low-pressure channel 117 ends abruptly loading is.
- the closing operation can be supported by means of a Fe ⁇ derelements, which presses the valve element 221 in its valve seat (not shown here).
- Figure 5 shows a further alternative embodiment of the ER- inventive valve device 100 in which the valve needle 120 is also hydraulically supported is transferred to a ballistic ⁇ 's flight, as soon as the deflection of the Ven ⁇ tilnadel 120 exceeds a predetermined needle lift.
- the electrical drive component 210 is formed in a substantially analogous to the corresponding drive component from the Figu ⁇ ren 1 to 4.
- Ser is however arranged voventil the shown here injection valve 200 so that the opening of the valve member 221 now takes place in the extension direction of the piezo stack 210th Thereby, the deflection of the piezo element 210 can be transferred via a simple pin-shaped transmission element 224 directly onto the valve element ⁇ 221st As shown in FIG. 5, the transmission element 224 does not sit directly on the ring element 214. The between the two elements
- FIG. 6 shows a possible injection process in which fuel is injected into the combustion chamber of an internal combustion engine in a plurality of individual sprays with the aid of the injection valve according to the invention.
- fuel 301 are injected as part of a pre-injection, which takes place in advance of the main injection.
- the smallest quantity injection is preferably carried out in a purely electrical mode, wherein the deflection of the valve needle is effected only by the direct drive.
- the piezoelectric actuator is actuated single low ⁇ Lich, so that its low deflection does not lead to the activation of the servo valve.
- a relatively high electrical voltage is applied to the piezoelectric actuator during the subsequent main injection phase in order to achieve activation of the servo valve by the correspondingly large deflection of the piezoactuator.
- the valve needle After activation of the servo valve, the valve needle reaches the bal ⁇ istic flight a larger needle lift, which is reflected in significantly larger injection quantities 302nd
- the main injections may also be followed by so-called post-injections in order to increase the energy content of the exhaust gases for the exhaust gas aftertreatment. Since in a post-injection also only very small amounts of fuel are injected into the combustion chamber, it is sufficient in this case to open the injection valve only by means of direct drive.
- the embodiments explained with reference to figures are merely preferred or exemplary Ausgestal ⁇ obligations of the invention. In addition to those described and illustrated embodiments, further embodiments are conceivable, which may include further modifications and combinations of characteristics.
- the valve device disclosed herein in connection with fuel injection may also be used to deliver or portion other lubricating or non-lubricating fluids.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010023698A DE102010023698A1 (de) | 2010-06-14 | 2010-06-14 | Einspritzventil mit Direkt- und Servoantrieb |
PCT/EP2011/059542 WO2011157613A1 (de) | 2010-06-14 | 2011-06-09 | Einspritzventil mit direkt- und servoantrieb |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2580462A1 true EP2580462A1 (de) | 2013-04-17 |
EP2580462B1 EP2580462B1 (de) | 2015-12-02 |
Family
ID=44279155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11724213.1A Not-in-force EP2580462B1 (de) | 2010-06-14 | 2011-06-09 | Einspritzventil mit direkt- und servoantrieb |
Country Status (5)
Country | Link |
---|---|
US (1) | US9429119B2 (de) |
EP (1) | EP2580462B1 (de) |
CN (1) | CN102933833B (de) |
DE (1) | DE102010023698A1 (de) |
WO (1) | WO2011157613A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010023698A1 (de) | 2010-06-14 | 2011-12-15 | Continental Automotive Gmbh | Einspritzventil mit Direkt- und Servoantrieb |
CN108274701A (zh) * | 2017-12-19 | 2018-07-13 | 东莞市热恒注塑科技有限公司 | 一种方形小间距针阀式热流道系统 |
DE102021114302A1 (de) | 2021-06-02 | 2022-12-08 | Vermes Microdispensing GmbH | Dosiersystem |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0692743B2 (ja) | 1985-04-01 | 1994-11-16 | 日本電装株式会社 | 流体制御用電磁弁 |
DK170121B1 (da) | 1993-06-04 | 1995-05-29 | Man B & W Diesel Gmbh | Gliderventil og stor totakts forbrændingsmotor |
DE19515508C2 (de) | 1994-04-28 | 1999-01-28 | Hitachi Ltd | Verfahren und Steuervorrichtung zur Antriebssteuerung eines Fahrzeugs mit Verbrennungsmotor und Getriebe |
DE19742073A1 (de) | 1997-09-24 | 1999-03-25 | Bosch Gmbh Robert | Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen |
US6595436B2 (en) | 2001-05-08 | 2003-07-22 | Cummins Engine Company, Inc. | Proportional needle control injector |
DE10308613A1 (de) * | 2003-02-27 | 2004-09-16 | Siemens Ag | Ventil mit einem Hebel, Hebel und Verfahren zur Herstellung eines Hebels |
DE102005041994B4 (de) * | 2005-09-05 | 2017-12-14 | Robert Bosch Gmbh | Kraftstoffinjektor mit direkt betätigbarem Einspritzventilglied und zweistufiger Übersetzung |
DE102006036444A1 (de) * | 2006-03-30 | 2007-10-04 | Robert Bosch Gmbh | Kraftstoffinjektor |
DE102006036780A1 (de) | 2006-08-07 | 2008-02-21 | Robert Bosch Gmbh | Krafstoffinjektor mit direkter Nadelsteuerung und Servoventil-Unterstützung |
DE102007026946B4 (de) * | 2007-06-12 | 2009-06-04 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben eines Einspritzventils, Computerprogramm und Einspritzventil |
JP4591555B2 (ja) * | 2008-06-12 | 2010-12-01 | 株式会社日本自動車部品総合研究所 | 燃料噴射ノズルおよびそれを用いた燃料噴射制御装置 |
DE102008042136A1 (de) * | 2008-09-16 | 2010-03-18 | Robert Bosch Gmbh | Kraftstoffinjektor mit mechanischer Übersetzung |
DE102010023698A1 (de) | 2010-06-14 | 2011-12-15 | Continental Automotive Gmbh | Einspritzventil mit Direkt- und Servoantrieb |
-
2010
- 2010-06-14 DE DE102010023698A patent/DE102010023698A1/de not_active Ceased
-
2011
- 2011-06-09 WO PCT/EP2011/059542 patent/WO2011157613A1/de active Application Filing
- 2011-06-09 CN CN201180029540.7A patent/CN102933833B/zh not_active Expired - Fee Related
- 2011-06-09 EP EP11724213.1A patent/EP2580462B1/de not_active Not-in-force
- 2011-06-09 US US13/703,641 patent/US9429119B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2011157613A1 * |
Also Published As
Publication number | Publication date |
---|---|
US9429119B2 (en) | 2016-08-30 |
DE102010023698A1 (de) | 2011-12-15 |
WO2011157613A1 (de) | 2011-12-22 |
EP2580462B1 (de) | 2015-12-02 |
CN102933833B (zh) | 2015-01-14 |
CN102933833A (zh) | 2013-02-13 |
US20130200180A1 (en) | 2013-08-08 |
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