EP2766593A1 - Coupleur hydraulique - Google Patents

Coupleur hydraulique

Info

Publication number
EP2766593A1
EP2766593A1 EP12770055.7A EP12770055A EP2766593A1 EP 2766593 A1 EP2766593 A1 EP 2766593A1 EP 12770055 A EP12770055 A EP 12770055A EP 2766593 A1 EP2766593 A1 EP 2766593A1
Authority
EP
European Patent Office
Prior art keywords
spring
pot
membrane
hydraulic coupler
coupler according
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
EP12770055.7A
Other languages
German (de)
English (en)
Other versions
EP2766593B1 (fr
Inventor
Dietmar SCHMIEDERER
Thomas Sebastian
Andreas Jakobi
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2766593A1 publication Critical patent/EP2766593A1/fr
Application granted granted Critical
Publication of EP2766593B1 publication Critical patent/EP2766593B1/fr
Active 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • 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
    • F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips

Definitions

  • a known fuel injection valve (DE 10 2004 002 134 A1) has a between a valve needle and a piezoelectric actuator axially clamped hydraulic coupler having a housing pot with Pot bottom and pot jacket and has a piston axially displaceable in the housing pot. There is a fluid-filled coupler gap between the piston and the bottom of the pot.
  • a first membrane made of steel is arranged, which defines a fluid-filled expansion chamber with the bottom of the pot. The first membrane covers the bottom of the pot and is attached to the edge of the cup by welding.
  • the compensation chamber is flow-connected to the coupler gap via a throttle element arranged in the bottom of the pot.
  • Pot bottom facing away from the end of the housing pot an existing between pot shell and piston annular gap.
  • the annular membrane is fixed with its outer edge of the membrane on the pot shell and with its inner edge of the membrane on the piston by welding.
  • a pressure distribution disc is inserted, which rests with a central elevation at the central region of the first membrane. Disclosure of the invention
  • the hydraulic coupler according to the invention with the features of claim 1 has the advantage that the wall thickness of the membrane can be kept small and thus a low stiffness of the membrane can be obtained by the additional axial spring force while maintaining a required in the valve installation state of the coupler Kopplerkraft. Due to the design of the spring element as a spring clip and the spring element has only a low spring stiffness, so that the gain reduction of the coupler obtained with the wall thickness reduction is not canceled. Overall, the overall stiffness of the coupler is kept advantageously low, so that the coupler clearly fulfills its task of compensating temperature-induced, different changes in length of two components with different thermal expansion coefficients, between which it is axially clamped. In addition, compared to a designed as a helical compression spring spring element is an essential
  • the spring clip on the pot sheath cross-spring shank and a spring leg interconnecting spring bridge, which rests with a central region on the membrane.
  • the determination of the spring clip is made by means of the spring legs, which are connected cohesively at their remote from the spring bridge leg ends with the pot jacket.
  • the spring bridge is concave, so that the central support area is realized in a simple manner.
  • the desired axial force acting on the membrane can be set very precisely prior to the cohesive fastening of the spring legs to the pot jacket by more or less axial sliding of the spring legs onto the housing pot.
  • the spring clip on two spring bridge to the diametrical spring legs, and spring legs and spring bridge are made in one piece from a spring band by punching or bending, so that the spring clip is a cost to be manufactured component.
  • the spring band in the spring bridge in turns, wherein advantageously the Wnditch are shaped so that the spring bridge is an S-shape with a straight central leg and two at each end of the middle leg continuing, curved outer legs has and the longitudinal axis of the middle
  • the spring band is made of high-strength spring steel, as it is for example also used for the membrane.
  • FIG. 1 shows a longitudinal section of a fuel injection valve with a hydraulic coupler
  • FIG. 2 is an enlarged view of section II in FIG. 1
  • FIG. 3 is a plan view of a spring clip of the hydraulic coupler in direction III in FIG. 2
  • the fuel injection valve shown in longitudinal section in Figure 1 as an exemplary embodiment of a general valve for metering a flowing medi- order, in particular a fluid, has a hollow cylindrical valve housing 1 1, one end of which is completed by a an injection or valve opening 13 having nozzle or valve body 12.
  • the valve opening 13 is controlled by an outwardly opening valve member 14, which is designed as a valve needle with a closing head, ie closed or released.
  • Valve member is actuated by an actuator 16 against the return force of the valve member 14 and the valve body 12 is supported return spring 15, wherein the valve member 14 releases the valve opening 13 via its closing head due to an applied voltage to the actuator 16.
  • the actuator 16 has an electrically controllable piezo module 19, also called a piezo stack, which is clamped by means of a hollow body 21 designed as a spring between a closure plate 18 and a closure body 20.
  • the actuator 16 engages via a gimbal bearing 17 on the valve member 14, wherein the gimbal bearing 17 is formed between the Schretekopffernen end of the valve needle of the valve member 14 and the end plate 18 of the actuator 16.
  • connection piece 22 is provided with a fluid connection 23 and an electrical connection plug 24.
  • connection plug 24 an electrical connection to the piezo module 20 of the actuator 16 is produced by means of an actuator-side contact member 25 and a housing-side contact member 26. Electrically conductive parts of the two contact members 25, 26 contact each other and are welded together at the contact points. Alternatively, the contacting parts of both contact members 25, 26 may be made integral with each other.
  • the hydraulic coupler 30, shown enlarged in longitudinal section in FIG. 2, has a housing pot 31 with a pot bottom 311 and a pot jacket 312 and a piston 33 guided axially displaceably in the housing pot 31.
  • the housing pot 31 is formed in a connection piece 22, blind hole-like recess
  • the cardan see storage is indicated in Figure 2 with 32.
  • the piston 33 is fixedly connected to the actuator 16, for which purpose in the piston 33, a central centering pin 34 with a projecting from the piston 33, hollow bolt head 341 firmly inserted, z. B. pressed, and the end body 20 of the actuator 16 is provided with an axially projecting pin 201, which reduced with a diameter
  • a fluid e.g. Oil, filled coupler gap 35 is present, and on the side facing away from the piston 33 outside of the housing pot 31, a thin first membrane 36 made of steel, which limits a flow-connected to the coupler gap 35 compensation chamber 37 on the outside of the housing pot 31.
  • the membrane 36 spans the pot bottom 31 1 and is fastened with its membrane edge to the pot jacket 312, e.g. cohesively connected to the pot jacket 312.
  • the material bond is symbolized in Figure 2 by a weld 39.
  • the first diaphragm 36 which is optimized in its design for a defined pressure generation in the compensation chamber 37, has a central, convex elevation 361 and a concave annular recess 362 concentrically surrounding it.
  • the membrane 36 facing bottom surface of the pot bottom 31 1 is adapted to the membrane shape.
  • a spring element 40 acts with an axially directed spring force on the membrane 36, so that an additional pressure in the fluid-filled compensation chamber
  • the likewise consisting of steel second membrane 41 is for this purpose annular and connected at its outer edge of the membrane with the pot jacket 312 and at its inner edge of the membrane with the piston 33 each cohesively.
  • the material connection at the inner edge of the membrane can also be made to the centering pin 34 pressed into the piston 33.
  • the cohesive connections are indicated in Figure 2 by welds 43 and 44.
  • the flow connection between the coupler gap 35 and the compensation chamber 37 is produced by at least one radial bore 38 in the pot jacket 312.
  • two diametrically arranged radial bores 38 are present, each in the sealed from the first diaphragm 36 compensation chamber 37 on the outside of the housing pot 31st and open in the annular gap 42 sealed by the second membrane 41 between the piston 33 and the cup jacket 312 of the housing pot 31.
  • the annular gap 42 acts as a throttle for the fluid flowing between the coupler gap 35 and the compensation chamber 37.
  • the spring element 40 is designed as a spring clip 45 which is fixed on the housing pot 31 and rests against the diaphragm 36 with axial prestressing.
  • the spring clip 45 has a plurality of, here two diametrically arranged spring legs 46, 47 and a spring leg 46, 47 interconnecting de spring bridge 48.
  • the spring legs 46, 47 engage over the membrane area lying against the pot jacket 312 and are firmly bonded to the pot jacket 312 with their leg ends facing away from the spring bridge 48.
  • the material bond is again indicated in FIG. 2 by a weld seam 49.
  • the spring bridge 48 spans the membrane area covering the pot bottom 31 1 and presses against the first membrane 36.
  • the spring bridge 48 is concavely arched for this purpose, thus has a protruding from the bridge edge in the space between the two spring legs 46, 47 concavity, wherein the concave curvature of the spring bridge 48 has a central region 484, which conformed to the convex elevation 361 of the membrane 36 is.
  • Spring bridge 48 and spring legs 46, 47 are produced in one piece from a spring band as a stamped and bent part, high-strength spring steel being used as band material. In the region of the spring bridge 48, the spring band runs in turns ( Figure 3).
  • the windings are shaped so that the spring bridge 48 S-shape with a straight central leg 481 and two, at one end of the middle leg 481 integrally adjoining, bent outer legs 482 and 483 and the axis of the central leg 481 and the axes the two spring legs 46, 47 lie in a plane which extends at right angles to the plane of the spring bridge 48.
  • the form-adapted central area 484 of the concave curvature of the spring bridge 48 resting on the convex elevation 361 of the first diaphragm 36 is on the middle one
  • Leg 481 is formed, and of the outer legs 482 and 483, the spring legs 46 and 47 are bent at right angles.
  • the spring legs 46,48 are axially pushed so far on the housing pot 31 that the spring bridge 48 presses with the desired bias on the first diaphragm 36.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)
  • Actuator (AREA)

Abstract

L'invention concerne un coupleur hydraulique, destiné notamment à des soupapes d'injection de carburant, qui comprend un boîtier (31) en forme de pot présentant un fond (311) et une enveloppe (312), un piston (33) guidé de manière à se déplacer axialement dans le boîtier (31), un entrefer de coupleur (35) rempli de fluide prévu entre le piston (33) et le fond (311) du pot, une membrane (36) disposée sur la face extérieure du boîtier (31) opposée au piston (33), un espace de compensation (37) délimité par la membrane (36) et en communication fluide avec l'entrefer de coupleur (35), et un élément élastique (40) qui exerce sur la membrane (36) une force élastique orientée dans le sens axial. Pour obtenir une faible rigidité globale du coupleur hydraulique à la force d'accouplement prédéfinie exigée, l'élément élastique (40) est réalisé sous la forme d'un étrier élastique (45) fixé au boîtier (31) et en appui contre la membrane (36) dans la zone du fond (311) du pot avec une précontrainte dans le sens axial.
EP12770055.7A 2011-10-14 2012-09-25 Coupleur hydraulique Active EP2766593B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011084512A DE102011084512A1 (de) 2011-10-14 2011-10-14 Hydraulischer Koppler
PCT/EP2012/068832 WO2013053594A1 (fr) 2011-10-14 2012-09-25 Coupleur hydraulique

Publications (2)

Publication Number Publication Date
EP2766593A1 true EP2766593A1 (fr) 2014-08-20
EP2766593B1 EP2766593B1 (fr) 2015-06-10

Family

ID=47008555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12770055.7A Active EP2766593B1 (fr) 2011-10-14 2012-09-25 Coupleur hydraulique

Country Status (9)

Country Link
US (1) US9624886B2 (fr)
EP (1) EP2766593B1 (fr)
JP (1) JP5916868B2 (fr)
KR (1) KR20140073525A (fr)
CN (1) CN103874848B (fr)
DE (1) DE102011084512A1 (fr)
IN (1) IN2014CN02720A (fr)
RU (1) RU2606731C2 (fr)
WO (1) WO2013053594A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201512350D0 (en) * 2015-07-15 2015-08-19 Delphi Int Operations Lux Srl Servo actuator for fuel injector
EP3139028A1 (fr) 2015-09-03 2017-03-08 Delphi International Operations Luxembourg S.à r.l. Coupleur à double extrémité pour servocommande
US10006429B2 (en) * 2016-03-31 2018-06-26 GM Global Technology Operations LLC Variable-area poppet nozzle actuator
KR101976940B1 (ko) 2017-08-30 2019-05-09 중앙대학교 산학협력단 긴 비암호화 RNA linc00598을 유효성분으로 함유하는 세포주기 조절용 시약 조성물
RU188574U1 (ru) * 2018-08-28 2019-04-17 Юрий Владимирович Загашвили Пьезомодуль

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US2966351A (en) * 1959-06-12 1960-12-27 Paragon Products Corp Dash-pot device
DE3533085A1 (de) * 1985-09-17 1987-03-26 Bosch Gmbh Robert Zumessventil zur dosierung von fluessigkeiten oder gasen
DE19650900A1 (de) * 1996-12-07 1998-06-10 Bosch Gmbh Robert Piezoelektrischer Aktuator
DE19919313B4 (de) * 1999-04-28 2013-12-12 Robert Bosch Gmbh Brennstoffeinspritzventil
WO2002031349A1 (fr) * 2000-10-11 2002-04-18 Siemens Vdo Automotive Corporation Ensemble compensateur muni d'une soupape sensible a la pression destine a etre accouple a un actionneur a solide situe dans un injecteur de carburant
DE10203659A1 (de) * 2002-01-30 2003-07-31 Bosch Gmbh Robert Brennstoffeinspritzventil
DE102004002081A1 (de) * 2004-01-15 2005-08-04 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004002134A1 (de) 2004-01-15 2005-08-04 Robert Bosch Gmbh Brennstoffeinspritzventil
RU2272169C2 (ru) * 2004-04-27 2006-03-20 Московский государственный открытый университет (МГОУ) Форсунка с электрическим управлением для подачи топлива в двигатель внутреннего сгорания
DE102004060533A1 (de) * 2004-12-16 2006-06-29 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102007018039A1 (de) * 2006-09-14 2008-03-27 Robert Bosch Gmbh Piezoaktormodul mit einem ummantelten Piezoaktor
DE102006050165A1 (de) * 2006-10-25 2008-04-30 Robert Bosch Gmbh Aktor mit Fluidisolierung
DE102007028490A1 (de) 2007-06-21 2008-12-24 Robert Bosch Gmbh Koppler zur Hubübertragung mittels Scherkraft, Injektor, sowie Verfahren zur Hubübertragung
EP2080895B1 (fr) * 2008-01-17 2011-10-19 Continental Automotive GmbH Agencement de compensation thermique et soupape d'injection
DE102008054652B4 (de) * 2008-12-15 2018-01-04 Robert Bosch Gmbh Hydraulischer Koppler
DE102009026532A1 (de) 2009-05-28 2010-12-02 Robert Bosch Gmbh Einspritzventil für ein Fluid
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Also Published As

Publication number Publication date
RU2014119129A (ru) 2015-12-10
DE102011084512A1 (de) 2013-04-18
EP2766593B1 (fr) 2015-06-10
CN103874848B (zh) 2016-10-26
RU2606731C2 (ru) 2017-01-10
US9624886B2 (en) 2017-04-18
JP5916868B2 (ja) 2016-05-11
JP2014528548A (ja) 2014-10-27
KR20140073525A (ko) 2014-06-16
US20150048265A1 (en) 2015-02-19
CN103874848A (zh) 2014-06-18
IN2014CN02720A (fr) 2015-07-03
WO2013053594A1 (fr) 2013-04-18

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