WO1987005670A1 - Systeme de positionnement a commande electrique - Google Patents

Systeme de positionnement a commande electrique Download PDF

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Publication number
WO1987005670A1
WO1987005670A1 PCT/DE1986/000476 DE8600476W WO8705670A1 WO 1987005670 A1 WO1987005670 A1 WO 1987005670A1 DE 8600476 W DE8600476 W DE 8600476W WO 8705670 A1 WO8705670 A1 WO 8705670A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
bore
actuator
actuating device
force
Prior art date
Application number
PCT/DE1986/000476
Other languages
German (de)
English (en)
Inventor
Gerhard BRÜGGEN
Dieter Karr
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
Priority to DE8686906779T priority Critical patent/DE3668954D1/de
Publication of WO1987005670A1 publication Critical patent/WO1987005670A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/262—Locking mechanisms using friction, e.g. brake pads
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F02M59/468—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means using piezoelectric operating means

Definitions

  • the invention relates to an electrically controllable actuating device according to the preamble of the main claim.
  • an electrically controllable valve device is known in which an electrical actuator exerts a clamping force on a piston-like valve member guided in a valve bore and displaceable by an actuating force and prevents its movement.
  • the actuator is designed as an electromagnet or as a layered piezoelectric disk.
  • a disadvantage of this arrangement is the asymmetrical application of force by the actuator to the piston-like valve member, in that it is pressed against the wall of the valve bore opposite the actuator.
  • the piston is located in the opening of a piezoceramic ring and is clamped by the ring by switching an operating voltage on or off.
  • the piezoceramic material is part of the piston or the piston itself and clamps the piston after insertion. Switch off an operating voltage in the bore.
  • the medium generating the compressive force is expediently the medium to be controlled by the actuating device. This is particularly advantageous if the piston is part of a valve.
  • the actuating device according to the invention is particularly suitable for fast actuators with response times in the microsecond range.
  • a preferred application is given in a fuel injection device for internal combustion engines, since efforts are made to achieve a pressure or quantity curve that is as rectangular as possible as a function of time.
  • the possible applications are not limited to valves.
  • an actuating element connected to the piston can be provided, which transmits the piston movement into an area outside the piston bore.
  • FIG. 1 shows a first and FIG. 2 a second exemplary embodiment of an electrically controllable actuating device
  • FIG. 3 shows an exemplary embodiment of an electrically controllable valve device.
  • Figure 1 shows a first embodiment of an electrically controllable actuating device. It has a housing 10 which has a bore 11. A piston 12, which has two end faces 13, 14, is guided tightly and slidably in the bore 11. At both ends of the bore 11 cross-sectional constrictions 15, 16 are provided, which each form stop faces 17, 18 for the piston 12 at the transition point to the bore 11. The cross-sectional constrictions 15, 16 are connected to bores 19, 20 for guiding a medium generating force.
  • the piston 12 has an actuating element 21 for transmitting the piston movement in an area outside the housing 10.
  • the bore 11 has a cross-sectional widening 22 into which an actuator 23 designed as a ring made of piezoelectric material is introduced. At the location of the cross-sectional widening 22, the inner surface of the ring 23 takes over the guidance of the piston 12.
  • the operating voltage for changing the cross-section is supplied to the ring 23 via the two lines 24, 25.
  • the actuating device according to FIG. 1 works as follows:
  • the piston 12 is in the position shown in FIG. 1, in which the end face 14 abuts the stop face 18, and is intended to move towards it opposite position take place, then the piston 12 is first clamped with the aid of the ring 23.
  • the reciprocal piezo effect of the ring 23 made of piezoelectric material is used.
  • a reduction in the inner ring diameter results depending on the manufacturing process of the piezoelectric ring 23 by switching the operating voltage on the leads 24, 25 on or off.
  • the leads 24, 25 can lead to two electrodes, which are located on the inner and outer circumference of the Ring 23, but advantageously arranged on the two end faces of the ring 23 after the piston 12 is clamped, a medium located in the bore 20, which can be gaseous or liquid, is brought to high pressure, which on the end face 14 of the Piston 12 exerts an actuating force.
  • the magnitude of the force is given by the maximum clamping force of the ring 23.
  • the outward movement is triggered by an electrically controlled enlargement of the cross section of the ring 23. It is applied to the opposite end face 13 of the piston
  • FIG. 2 shows a second embodiment of the actuating device according to the invention.
  • a bore 31 is located in a housing 30.
  • a bore 32 is sealed in the bore 31 and a piston 32, which has two end faces 33, 34, slide.
  • the piston 32 consists at least partially of piezoelectric material 35 which also serves as an actuator. The remaining material can be selected so that it withstands the impact load when it hits one of the two support surfaces 36, 37, which are caused by cross-sectional constrictions 38, 39 of the bore 31.
  • the cross-sectional constrictions 38, 39 are connected to bores 40, 41, which carry a medium generating force.
  • the piston 32 is equipped with an actuating element 42 which transmits the piston movement taking place in the bore 31 to the outside.
  • the operating voltage for changing the cross section is supplied to the piezoelectric material 35 by two leads 43, 44.
  • the mode of operation of the exemplary embodiment shown in FIG. 2 largely corresponds to that of the exemplary embodiment shown in FIG. One difference is that the piezoceramic material 35 in the piston 32 presses against the inner wall of the bore 31 by enlarging the cross section, thereby preventing the piston from moving.
  • FIG. 3 shows an embodiment of the actuating device as an electrically controllable valve device.
  • a housing 50 has a valve bore 51.
  • a piston-like valve member 52 is tightly and slidably guided.
  • the valve member 52 has a conical end face 53 which interacts with a corresponding hollow conical seat surface 54.
  • the seat surface 54 is arranged at the transition from an inlet bore 55 into the coaxially arranged valve bore 51, the valve bore 51 having a larger diameter than the inlet bore 55.
  • an annular chamber 56 is provided coaxially with the valve bore 51.
  • An outlet bore 57 opens into the annular chamber 56.
  • the end face 58 of the valve member 52 opposite the conical end face 53 is supported on a compression spring 59, the other end of which rests against a stop 60 arranged in the valve bore 51.
  • the stop 60 has at least one opening 61.
  • a cross-sectional widening 62 of the valve bore 51 is provided, in which an actuator 63, which is arranged coaxially to the valve member 52 and is designed as a ring made of piezoceramic material, is provided.
  • the ring 63 can be connected to an operating voltage via supply lines 64, 65.
  • the medium to be controlled by the valve member 52 in the inlet bore 55 itself generates the actuating force for the opening movement of the valve member 52.
  • All of the exemplary embodiments have in common that the clamping force acts symmetrically on the piston 12, 32 or the valve member 52.
  • the symmetrical distribution of force in connection with the pressurized surface extending over the entire circumference of the piston 12, 32 or the valve member 52 results in a high clamping force with small working strokes of the piezoceramic 23, 35, 63.
  • An increase in the clamping force in the two exemplary embodiments according to FIGS. 1 and 3 can be achieved by increasing the clamping areas between the piston 12 or the valve member 52 and the ring 23, 63 by means of cross-sectional expansions of the two interacting parts 12, 23 and 52, 63.
  • a cross-sectional enlargement can also be carried out in the area of the actuator 35 in the bore 31 for this purpose. Restricting the cross-sectional expansion to only a part of the axial extension combines the advantage of increasing the clamping area with only a slight increase in mass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

Un système d'ajustement à commande électrique possède un piston (52) qui est introduit dans un alésage (51) de manière étanche et coulissante, ce système étant caractérisé par des temps d'actionnement courts. Le système d'ajustement comprend un élément de réglage électrique (63) dont la force de serrage, effective tout autour de la circonférence du piston, empêche le mouvement de ce piston. Les éléments de réglage à commande électrique (63) utilisés sont de préférence des anneaux en matériau piézo-céramique.
PCT/DE1986/000476 1986-03-14 1986-11-22 Systeme de positionnement a commande electrique WO1987005670A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8686906779T DE3668954D1 (de) 1986-03-14 1986-11-22 Elektrisch ansteuerbares kraftstoffeinspritzventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP3608494.8 1986-03-14
DE19863608494 DE3608494A1 (de) 1986-03-14 1986-03-14 Elektrisch ansteuerbare stelleinrichtung

Publications (1)

Publication Number Publication Date
WO1987005670A1 true WO1987005670A1 (fr) 1987-09-24

Family

ID=6296320

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1986/000476 WO1987005670A1 (fr) 1986-03-14 1986-11-22 Systeme de positionnement a commande electrique

Country Status (4)

Country Link
EP (1) EP0298076B1 (fr)
JP (1) JPH01501812A (fr)
DE (2) DE3608494A1 (fr)
WO (1) WO1987005670A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19531652A1 (de) * 1995-08-29 1997-05-07 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19621796A1 (de) * 1996-05-30 1997-12-04 Nass Magnet Gmbh Ventil
DE19649225A1 (de) * 1996-11-27 1998-05-28 Nass Magnet Gmbh Ventil
DE10203260A1 (de) * 2002-01-29 2003-07-31 Heinz Leiber Klemmelement
DE102005038426A1 (de) * 2005-08-16 2007-02-22 Wilo Ag Ventil mit Piezoelement
DE102006048841A1 (de) * 2006-10-13 2008-04-17 IGAM Ingenieurgesellschaft für angewandte Mechanik mbH Schnellschaltender Auslösemechanismus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1456127A (fr) * 1964-11-06 1966-05-20 Int Standard Electric Corp Dispositif de commande de position
US3362505A (en) * 1965-02-10 1968-01-09 Avco Corp Band brake
US3902084A (en) * 1974-05-30 1975-08-26 Burleigh Instr Piezoelectric electromechanical translation apparatus
US4219755A (en) * 1977-03-18 1980-08-26 Physics International Company Electromotive actuator
EP0050711A1 (fr) * 1980-10-23 1982-05-05 Robert Bosch Gmbh Soupape à commande électrique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077685A (ja) * 1983-10-04 1985-05-02 Shoketsu Kinzoku Kogyo Co Ltd ブレ−キ装置
JPS60104819A (ja) * 1983-11-11 1985-06-10 Canon Inc ブレ−キ装置
JPS60155073A (ja) * 1984-01-25 1985-08-14 Nippon Denso Co Ltd 圧電素子駆動の切換弁
JPS6189975A (ja) * 1984-10-09 1986-05-08 Diesel Kiki Co Ltd 内燃機関の燃料噴射ノズル装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1456127A (fr) * 1964-11-06 1966-05-20 Int Standard Electric Corp Dispositif de commande de position
US3362505A (en) * 1965-02-10 1968-01-09 Avco Corp Band brake
US3902084A (en) * 1974-05-30 1975-08-26 Burleigh Instr Piezoelectric electromechanical translation apparatus
US4219755A (en) * 1977-03-18 1980-08-26 Physics International Company Electromotive actuator
EP0050711A1 (fr) * 1980-10-23 1982-05-05 Robert Bosch Gmbh Soupape à commande électrique

Also Published As

Publication number Publication date
DE3668954D1 (de) 1990-03-15
JPH01501812A (ja) 1989-06-22
DE3608494A1 (de) 1987-09-17
EP0298076B1 (fr) 1990-02-07
EP0298076A1 (fr) 1989-01-11

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