EP1690025A1 - Dispositif, procede pour produire ledit dispositif ; dispositif de chambre et dispositif de transfert - Google Patents

Dispositif, procede pour produire ledit dispositif ; dispositif de chambre et dispositif de transfert

Info

Publication number
EP1690025A1
EP1690025A1 EP04804690A EP04804690A EP1690025A1 EP 1690025 A1 EP1690025 A1 EP 1690025A1 EP 04804690 A EP04804690 A EP 04804690A EP 04804690 A EP04804690 A EP 04804690A EP 1690025 A1 EP1690025 A1 EP 1690025A1
Authority
EP
European Patent Office
Prior art keywords
chamber
recess
piston
groove
elastomer
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
Application number
EP04804690A
Other languages
German (de)
English (en)
Other versions
EP1690025B1 (fr
Inventor
Hellmut Freudenberg
Willibald SCHÜRZ
Martin Simmet
Hanspeter Zink
Günter Ziegler
Achim LÖLL
Hans Peter Arnold
Patrick Delp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Freudenberg KG
Continental Automotive GmbH
Original Assignee
Carl Freudenberg KG
Siemens AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carl Freudenberg KG, Siemens AG filed Critical Carl Freudenberg KG
Publication of EP1690025A1 publication Critical patent/EP1690025A1/fr
Application granted granted Critical
Publication of EP1690025B1 publication Critical patent/EP1690025B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger 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
    • 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
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials
    • 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

Definitions

  • the invention relates to a device having a first body which has a recess and a second body which is guided into the recess.
  • the invention further relates to a method for producing the device.
  • the invention further relates to a chamber device with a chamber, which has a chamber housing which has a recess, with a piston and with the device.
  • the invention further relates to a transmission device that transmits a deflection of an actuator, in particular for an injection valve, with the chamber device.
  • a transmission device can be arranged in an injection valve of an internal combustion engine and preferably transmits the deflection of an actuator to a nozzle needle.
  • Piezo actuators are increasingly being used as actuators for this purpose, which, due to their very fast response time to control signals, are very well suited to precisely control the metering of fuel and, if necessary, to enable several consecutive partial injections during a working cycle of a cylinder of the internal combustion engine.
  • an actuator designed as a piezo actuator has only a significantly shorter stroke than the required stroke of the nozzle needle.
  • a transmission device which, if necessary, amplifies the stroke and / or also creates a temperature-related length compensation.
  • DE 199 50 760 a fuel injection valve is known which has a piezoelectric or agnetostrictive actuator. Between the actuator and a valve needle, a transmission device with two reciprocating pistons is provided. The transmitter device is hermetically sealed from a valve interior.
  • the first reciprocating piston is operatively connected to the actuator and has a hollow cylinder shape open on one side, the opening of which is arranged facing away from the actuator.
  • the second reciprocating piston is guided in the cylinder opening.
  • the first reciprocating piston is in turn located in a hollow cylindrical housing.
  • a transfer chamber is formed between an end surface of the housing and the first and second pistons.
  • a tension spring is also provided, which prestresses the first and second pistons in the opposite direction.
  • a compensation chamber is provided, which is partially delimited by a corrugated pipe and is hydraulically coupled to the transmission chamber. The compensation chamber serves to compensate for a change in volume of the transfer chamber and to supply the transfer chamber with a transfer medium with a fixed pressure.
  • a corrugated tube is relatively complex and expensive.
  • a transmitter device for transmitting the deflection of a piezoelectric actuator of an injection valve acts on a first reciprocating piston 1, which is designed in the form of a cylinder pot in a partial area and engages in the pot interior with a second piston which is coupled to a servo valve or a nozzle needle of the injection valve.
  • the first piston is guided in a cylinder body.
  • the second reciprocating piston is also guided in the cylinder body.
  • the first and second reciprocating pistons are coupled via a pressure chamber.
  • An axial deflection of the first reciprocating piston is transmitted by means of the pressure chamber into an opposite axial deflection of the second reciprocating piston.
  • a compensation chamber is also provided, which detects a change in volume in the transformer compensates chamber and the transmitter chamber is supplied with a transmission medium with a predetermined pressure.
  • the object of the invention is to provide a device, a method for producing the device, a chamber device and a transfer device which are simple and which have a long service life.
  • the invention is characterized by a device having a first body which has a recess and a second body which is inserted into the recess and an elastomer which is introduced into the recess between the first and second bodies and thus closes and seals the space between the first and second bodies in this area, the elastomer having a first groove which extends at least partially along the recess at a distance from the wall of the recess.
  • the invention thus makes use of the surprising finding that the durability of the device is significantly extended by the groove, even if the elastomer is exposed to high pressure fluctuations, since a pressure force is generated by the groove, which acts from the groove to the wall of the recess and thus pressing the elastomer against the recess and thus strengthening the sealing effect.
  • the first groove is circumferential, then a particularly uniform tightness is easily ensured along the entire recess.
  • the first groove is guided at a distance of 0.2 to 1.5 mm from the wall of the recess. Then the sealing effect is particularly well developed.
  • a second groove is provided which extends radially within the he ⁇ most groove. This can then also specifically the sealing ⁇ effectively be significantly improved towards the second body.
  • the second groove is advantageously spaced 0.2 to 1.5 mm apart from the contact of the elastomer with the second body. Thus it ⁇ adopt its particularly good sealing effect between the elastomer and the second body.
  • the first groove is deeper than the second groove.
  • the overall sealing effect can be significantly improved, which is based on the knowledge that sealing problems occur to an increased extent on the wall of the recess. It is particularly advantageous here if the second groove is so wide that it opens into the first groove. This has the V, the device can be manufactured very easily orteil that since the tool can be easily removed from the mold for making the contour of the elastomer.
  • the regions of the first and second body on which the elastomer comes into contact are free from edges. Possible cross-sectional changes are rounded. This has d s V or- part, that a coupling agent to the first body and the second body is applied to a good bond between the elastomer and the first and second body ensure easy with a uniform thickness on which it ⁇ most and second body can be applied.
  • the first and second bodies are tubular. They are then suitable for insertion in wei ⁇ tere body and can then, for example, connected to them by means of a welded connection permanently.
  • the device can easily be manufactured separately and are used in ⁇ play, for a chamber apparatus.
  • a chamber device with a chamber comprising a chamber housing has, which has a recess, with a piston and with the device, the chamber housing, the first body and / or the piston of the second body is.
  • Another chamber device is characterized by a chamber which has a chamber housing which has a recess with a piston and the device, the first and second bodies being tubular and the Kammerge ⁇ housing with the first body and the piston with the second Bodies are connected.
  • This compound is specially made part way by means of welding before ⁇ .
  • the invention is also characterized by a UE bert rager ⁇ device which transmits a deflection of an actuator, into ⁇ particular for an injection valve, having a housing, the egg has ⁇ ne first recess in which a first and a two ⁇ ter piston movable are mounted, and the first and the second piston via at least one transfer chamber communicate via a fluid operatively connected, wherein the operative connection causes a displacement of the second piston, when the first Kol ⁇ ben is moved and vice versa, wherein the transfer chamber via a sealing gap with a equalization chamber is hydraulically connected, chamber of the pressure differences between the UE bert rager ⁇ and compensates for a delay of the compensating chamber, and the chamber means, said chamber the compensating chamber, the chamber housing, the housing and the piston of the first Col ⁇ are ben.
  • This has the advantage that the elastomer is ditegün Stig manufacture ⁇ and is the compensation chamber total cost-effectively.
  • the invention is also characterized by a method for manufacturing the device, wherein the first body and the second body are plasma-activated, the first Kör ⁇ via and the second body in the areas in which the Ela ⁇ Stomer is intended to abut, with to be provided with an adhesion promoter and then the elastomer is introduced and vulcanized.
  • activating the plasma which is preferably carried out by means of an ionized gas, for example oxygen, radicals are generated in the areas of the first and second bodies where the elastomer is to be applied, which are very easy to bind and thus bind the bonding agent very well lead the areas of the first and second body.
  • an ionized gas for example oxygen
  • FIG. 2 shows a first embodiment of a transmission device
  • FIG. 3 shows a second embodiment of the transmission device
  • FIG. 4 shows a device
  • FIG. 5 shows a top view of the device according to FIG. 4
  • FIG. 6 shows a top view of a further embodiment of the device
  • FIG. 7 shows a top view of a further embodiment of the device.
  • An injection valve 1 has an actuator 2, which is operatively connected to a nozzle needle 4 via a transmission device 3.
  • the actuator 2 is preferably a piezoelectric actuator educated . However, it can be another actuator that generates a stroke.
  • the transmission device 3 preferably translates the deflection of the actuator 2 in the direction of the nozzle needle in such a way that a deflection of the actuator 2 in the direction of the nozzle needle 4 is transmitted into an enlarged deflection of the nozzle needle 4. Furthermore, it resembles also preferred tempera ⁇ in- Jerusalem changes in length of the actuator from.
  • the nozzle needle 4 closes or releases a nozzle 41 in the injection valve 1 and thus controls the metering of fuel.
  • the transmission device 3 can also transmit a deflection of the actuator 2 in the direction of the nozzle needle 4 in the opposite direction to the nozzle needle 4.
  • the transmission device 3 has a first piston 6, which has an annular cylinder shape that is open on one side.
  • the ring-cylindrical part of the first piston 6 delimits a first transmission chamber 10 into which a second piston 7 is guided.
  • the first piston 6 is introduced into a cup-shaped recess 8 of the housing 5 and guided there.
  • the second piston 7 is guided in a further recess 16 of the housing 5 and projects into a recess 9 of the first piston 6.
  • the second piston 7 has an annular shoulder, at which its diameter increases abruptly towards the region which is guided in the first piston 6.
  • the shoulder forms an annular rear surface 13 of the second piston 7.
  • a first end surface 17 of the first piston, the rear surface 13 of the second piston and the end surface 15 of the housing 5 delimit a second transmission chamber 11.
  • the second transmission chamber 11 is hydraulically connected to the first transmission chamber 10 via a first sealing gap 18, which is formed between a side wall of the second piston 7 and an inner wall of the first piston 6.
  • the first transfer chamber 10 is surrounded by a second end face 19 of the first piston 6 and an end face 20 of the second piston 7 limited.
  • the first sealing gap 18 is designed so narrow that brief pressure fluctuations between the transfer chambers 10, 11 are not compensated for.
  • the second transfer chamber 11 via a second sealing gap 21 which is between the outer wall of the first piston and the inner wall of the housing ä uses formed, connected to a compensation chamber 22nd
  • the first transmission chamber 10 is hydraulically coupled to the compensation chamber 22 via a bore 60 which is introduced into the first piston 6.
  • the compensation chamber 22 is delimited by a back surface 14 of the first piston and by a device which is described in detail with reference to FIG. 4.
  • the device comprises a first sleeve 52 and a second sleeve 53 with a smaller diameter than the first sleeve 52.
  • An elastomer 50 is inserted between the first and second sleeves 52, 53.
  • the first sleeve 52 is fixedly connected to the housing 4, preferably by means of welding.
  • the second sleeve 53 is firmly connected to the first piston 6, preferably also by means of welding.
  • the elastomer 50 is introduced into the space between the first piston 6 and the end region of the housing 5.
  • the embodiment according to FIG. 2 offers the advantage that the first and second sleeves 52, 53 and the elastomer can be manufactured in advance. Due to its elastic properties, the elastomer 50 is intended to enable the volume of the compensation chamber 22 to be increased and thus to avoid excessive increases in pressure.
  • the first and the second transfer chambers 10, 11 and the compensation chamber 22 are filled with a fluid, preferably 01 crowded.
  • the housing 5, the first piston 6 and the second Col ⁇ ben 7 and the first and second sleeves 52, 53 are preferably made of steel before ⁇ .
  • Preferred is a Spannmit ⁇ tel 54, which is preferably designed as a helical spring, is provided that on the one hand on a stop ring 55 from ⁇ supports and on the other hand acts on the elastomer 50th
  • the tensioning means is preloaded in such a way that it preloads the elastomer 50 in the direction of the compensation chamber 22 with a predetermined force.
  • FIG. 4 shows the device with a first body, which is designed as a first sleeve 52, with a second body, which is designed as a second sleeve 53, and the elastomer 50.
  • the first body is the housing 5 and the second body is the first piston 6.
  • the elastomer 50 is introduced into the intermediate region between the first sleeve 52 and the second sleeve 53 in such a way that it closes and seals it.
  • first groove 61 is formed, spaced toward the Wan ⁇ the recess extension extending along the recess.
  • I t is, as illustrated in plan view in Figure 5, circumferentially within the recess of the first sleeve 52, that is, the region enclosed by the sleeve 52 in the interior area. It is be ⁇ vorzugt spaced from the wall of the first sleeve at a distance of 0.2 to 1.5 mm relative to the groove center angeor d ⁇ net.
  • the depth of the first groove is preferably chosen between 0.2 and 1.5 mm.
  • a second groove 62 is provided, the leading edge of which is preferably between 0.2 and 1.5 mm to the second sleeve 53 is spaced.
  • the second groove 62 ensures that the pressure prevailing in the compensation chamber 22 also acts radially on the second sleeve 53 and thus presses the elastomer 50 against the second sleeve 53. This also significantly improves the sealing effect with regard to the second sleeve 53.
  • the second groove 62 is preferably formed less deep than the first groove 61. This is based on the knowledge that a less deep second groove is already sufficient to ensure sufficient tightness of the elastomer 50 on the second sleeve 53, in contrast to that first sleeve 52. In addition, the smallest possible depth of the grooves 61, 62 is desirable with a view to minimizing the volume of the compensating chamber 22. Because the second groove 62 opens directly into the first groove 61, the mold can be removed more easily possible with which the elastomer is brought into its shape, which makes the device much easier to manufacture, especially with regard to very small dimensions.
  • the first body designed as first sleeve 52 and the second body designed as second sleeve 53 are plasma-activated. This is preferably done by purging with ionized gas, e.g. Oxygen, as a result of which radical sites are formed on the metal surface, which results in the surfaces of the first and second sleeves 52, 53 being very easy to bind.
  • ionized gas e.g. Oxygen
  • An adhesion promoter is then applied to the first and second sleeves, preferably in the area in which the elastomer 50 is to be in contact. The effect of the adhesion promoter is all the better the thinner the layer that is provided with the adhesion promoter. Ideally, this is a monomolecular layer.
  • the rounded edges of the first and second sleeves 52, 53 ensure that the adhesion promoter is simple can distribute evenly. Tests have shown that too sharp edges in an uneven distribution of the adhesive ⁇ agent and thus can lead to local layer thickness variations, with the result that in the thicker Berei- the adhesion promoter chen the elastomer not so good on the first and second sleeve 52, 53 is liable and leakages can occur as a result.
  • the first and second sleeves 52, 53 are placed in a corresponding molding tool and then the elastomer composition is injected and brought into its shape permanently by means of a vulcanization process.
  • a vulcanization process Another embodiment of the device is shown with reference to Figure 6.
  • the tubular first body is formed here in a rectangular basic shape.
  • the first and second bodies can also be designed in further tube shapes, such as a basic ellipse shape.
  • the first groove 61 is not formed circumferentially in this embodiment, but only in sections, preferably in the areas in which an additional radial clamping force of the elastomer 50 is necessary to ensure the desired Dichtwir ⁇ effect and durability of the device.
  • the first groove 61 is designed so wide in the radial direction that sufficient forces are exerted on this wall via its wall facing the first sleeve 52 in order to increase the tightness with respect to the first sleeve 52 ensure ⁇ and at the same time sufficient contact forces are transmitted through the wall facing the second sleeve 53, which ensure sufficient tightness with respect to the second sleeve 53.
  • the device according to Figures 4, 5, 6 and 7 can also be used for any other chamber device in addition to a transmitter device 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Actuator (AREA)
  • Sealing Devices (AREA)
  • Gasket Seals (AREA)

Abstract

L'invention concerne un dispositif de transfert qui transmet une déviation d'actionneur, notamment pour une soupape d'injection. Ledit dispositif comprend un boîtier (5) présentant une première cavité dans laquelle sont logés, de manière mobile, un premier et un second piston (6, 7). Le premier et le second piston (6, 7) sont en coopération par l'intermédiaire d'un fluide, par le biais d'au moins une chambre de transfert (10, 11). La coopération induit un déplacement du second piston (7), lorsque le premier piston (6) est déplacé et inversement. La chambre de transfert (10) est couplée par voie hydraulique à une chambre de compensation (22), par l'intermédiaire d'une fente d'étanchéité, ladite chambre de compensation compensant de manière décalée les différences de pression entre la chambre de transfert (10, 11) et la chambre de compensation (22). Le dispositif de transfert comprend en outre un dispositif de chambre comprenant une chambre qui constitue la chambre de compensation (22), un boîtier de chambre, qui constitue le boîtier (5) et un piston, qui constitue le premier piston (6). Le dispositif de chambre comprend un dispositif présentant un premier corps muni d'une cavité, ainsi qu'un second corps, qui est introduit dans la cavité, de même qu'un élastomère (50), qui est inséré entre le premier et le second corps et ferme et étanchéifie par conséquent, dans cette zone, l'espace intermédiaire compris entre le premier et le second corps. L'élastomère (50) comporte une première rainure (61) qui s'étend au moins en partie le long de la cavité, à distance de la paroi de ladite cavité.
EP04804690.8A 2003-12-05 2004-12-06 Dispositif, procede pour produire ledit dispositif ; dispositif de chambre et dispositif de transfert Not-in-force EP1690025B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10356848 2003-12-05
PCT/EP2004/053285 WO2005054725A1 (fr) 2003-12-05 2004-12-06 Dispositif, procede pour produire ledit dispositif ; dispositif de chambre et dispositif de transfert

Publications (2)

Publication Number Publication Date
EP1690025A1 true EP1690025A1 (fr) 2006-08-16
EP1690025B1 EP1690025B1 (fr) 2017-05-03

Family

ID=34638377

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04804690.8A Not-in-force EP1690025B1 (fr) 2003-12-05 2004-12-06 Dispositif, procede pour produire ledit dispositif ; dispositif de chambre et dispositif de transfert

Country Status (5)

Country Link
US (1) US7726625B2 (fr)
EP (1) EP1690025B1 (fr)
JP (1) JP2007515604A (fr)
CN (1) CN100523568C (fr)
WO (1) WO2005054725A1 (fr)

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CN109958564B (zh) * 2017-12-26 2023-09-29 天津大学（青岛）海洋工程研究院有限公司 一种用于柴油机共轨式电控喷油器的电磁阀

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Also Published As

Publication number Publication date
CN100523568C (zh) 2009-08-05
US7726625B2 (en) 2010-06-01
JP2007515604A (ja) 2007-06-14
US20070241295A1 (en) 2007-10-18
CN1890493A (zh) 2007-01-03
WO2005054725A1 (fr) 2005-06-16
EP1690025B1 (fr) 2017-05-03

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