WO2001053689A1 - Soupape de regulation de liquides - Google Patents

Soupape de regulation de liquides Download PDF

Info

Publication number
WO2001053689A1
WO2001053689A1 PCT/DE2000/004104 DE0004104W WO0153689A1 WO 2001053689 A1 WO2001053689 A1 WO 2001053689A1 DE 0004104 W DE0004104 W DE 0004104W WO 0153689 A1 WO0153689 A1 WO 0153689A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
closing member
chamber
valve seat
spring
Prior art date
Application number
PCT/DE2000/004104
Other languages
German (de)
English (en)
Inventor
Dieter Kienzler
Johannes-Jörg Rueger
Udo Schulz
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 EP00989780A priority Critical patent/EP1165956A1/fr
Priority to JP2001553526A priority patent/JP2003520326A/ja
Publication of WO2001053689A1 publication Critical patent/WO2001053689A1/fr

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
    • 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
    • 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
    • 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
    • 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
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/004—Actuating devices; Operating means; Releasing devices actuated by piezoelectric means
    • F16K31/007—Piezoelectric stacks
    • 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

Definitions

  • the invention is based on a valve for controlling liquids according to the kind defined in the preamble of claim 1.
  • Such a valve is known from DE 197 328 02 in a fuel injection device for internal combustion engines with a high-pressure fuel source.
  • the fuel injection device has two valve seats, which interact with sealing surfaces of a valve closing member when actuated by a piezo drive in a movement sequence, the valve closing member being initially in the closed position on the first valve seat, then being brought into an intermediate position between the valve seats and then being brought back in again to reach a closed position on the second valve seat.
  • a piezoelectric actuator is charged to a rail pressure-dependent voltage, which lengthens the actuator and results from it. ting movement of the valve closing member to the second valve seat results. The actuator is discharged to reverse the valve closing member in the direction of the first valve seat.
  • valve closing member In this way, the movement of the valve closing member from one valve seat to the other provides a brief relief for a valve control chamber under high pressure, the pressure level of which determines an open or closed position of a valve needle in the force-balanced fuel injection device and thus controls the fuel injection.
  • the fuel injection is made possible while the valve closing member is in an intermediate position between the two
  • Valve seats. In this way a double fuel injection, e.g. a pre-injection and a main injection can be realized by means of a single excitation of the piezo drive.
  • valve according to the invention for controlling liquids with the features of claims 1 and 6 has the advantage that the actuating movements of the valve closing element are damped by means of a spring device according to the invention in such a way that the valve closing element in its intermediate or middle position between the two valve seats simple and inexpensive means is mechanically stabilized.
  • the invention enables the reliable realization of an average valve lift independent of a high pressure prevailing at the second valve seat, the valve being able to be operated with double-switching with an energetically favorable control. This means that even high-frequency and small injections of liquids, especially fuel, can be carried out through the Valve according to the invention can be made exactly without there being any fluctuations in the injection quantity due to overshoots of the valve closing element or an injection being completely absent.
  • FIG. 1 shows a schematic, partial representation of a first embodiment of the invention in a fuel injection valve for internal combustion engines in longitudinal section, with a valve closing member in an intermediate position between the first valve seat and a second valve seat;
  • FIG. 2 shows a schematic cross section along the line I-I in FIG. 1;
  • Figure 3 is a graph of a qualitative curve of a force that dampens the movement of the valve closing member in its intermediate position;
  • FIG. 4 shows a schematic, partial representation of a further exemplary embodiment of the invention in a fuel injection valve for internal combustion engines in a longitudinal section. Description of the exemplary embodiments
  • FIG. 1 and FIG. 2 shows the use of the valve according to the invention in a fuel injection valve 1 for
  • the fuel fine injection valve 1 is designed as a common rail injector, the fuel injection being controlled via the pressure level m in a valve control chamber 2, which is rather connected to a high pressure supply.
  • a valve member 3 is controlled via a piezoelectric unit designed with a piezoelectric actuator 4, which is arranged on the side of the valve member 3 facing away from the valve control chamber and combustion chamber.
  • the piezoelectric actuator 4 is constructed in a known manner from several layers and has an actuator head 5 on its side facing the valve member 2 and an actuator foot 6 on its side facing away from the valve member, which is supported on a valve housing 7.
  • An actuator piston 9 of the valve member 3 bears on the actuator head 5 via a support 8, the piston being of stepped diameter.
  • the valve member 3 is axially displaceable in a
  • Long bore bore 10 of the valve housing 7 is arranged and comprises, in addition to the actuating piston 9, an actuating piston 12 actuating a spherical valve closing member 11.
  • the actuating piston 9 and the actuating piston 12 are coupled to one another by means of a hydraulic transmission.
  • the hydraulic transmission is designed as a hydraulic chamber 13, which transmits the deflection of the piezoelectric actuator 4.
  • the hydraulic chamber 13 encloses a common compensation volume between the two pistons 9 and 12 delimiting it, of which the actuating piston 12 is designed with a smaller diameter and the actuating piston 9 with a larger diameter.
  • the hydraulic chamber 13 is clamped between the actuating piston 9 and the actuating piston 12 in such a way that the actuating piston 12 makes a stroke which is increased by the ratio of the piston diameter when the larger actuating piston 9 is moved by a certain distance by the piezoelectric actuator 4.
  • the actuating piston 9, the actuating piston 12 and the piezoelectric actuator 4 lie one behind the other on a common axis.
  • valve closing member 11 At the valve control chamber end of the valve member 3 or actuating piston 12, the spherical valve closing member 11 cooperates in a valve chamber 17 with valve seats 14, 15 formed on the valve housing 7, the first or upper valve seat 14 forming a low-pressure region 18 and the second or lower one Valve seat 15 leads to valve control chamber 2, which is under high pressure.
  • a spring 16 is assigned to the lower valve seat 15 and holds the valve closing member 11 on the upper valve seat 14 when the valve control chamber 2 is relieved.
  • a movable valve control piston is arranged, which is not shown in the drawing.
  • an injection nozzle of the fuel injection valve 1 is controlled in a manner known per se.
  • An injection line, which supplies the injection nozzle with fuel, usually also flows into the valve control chamber 2.
  • the injection line is connected to a high-pressure storage space (common rail) that is common to several fuel injection valves.
  • the high-pressure storage space is fed in a known manner from a high-pressure fuel pump with high-pressure fuel from a storage tank.
  • a spring device 20 is arranged in a region between the hydraulic chamber 13 and the valve chamber 17, in which the valve closing member 11 is arranged.
  • the spring device 20 interacts in operation of the fuel injection valve 1 with a taper 21 on the actuating piston 12, the taper 21 and the spring device 20 being arranged relative to one another in such a way that they engage with one another when the valve closing member 11 is in its intermediate position.
  • the spring device 20 is formed in the embodiment shown with a tension spring 22 which is supported at its end facing away from the valve member 3 or actuating piston 12 on the valve housing 7 and at its other, the actuating piston 12 facing end has a sliding device 23.
  • a valve system pressure chamber 25 connects to the piezo-side end of the bore 10. This is delimited on the one hand by the valve housing 7 and on the other hand by a sealing element 26 which is connected to the actuating piston 9 of the valve member 3 and the valve housing 7 and which is designed here as a bellows-like membrane and prevents the piezoelectric actuator 4 from contacting the valve system pressure chamber 25 contained fuel comes into contact.
  • a filling device 27 is indicated schematically for filling the low-pressure region 18.
  • the fuel injection valve 1 according to FIG. 1 and FIG. 2 operates in the manner described below.
  • valve closing member 11 of the valve member 3 is held in contact with the upper valve seat 14 assigned to it, so that no fuel can get from the valve control chamber 2 connected to the high-pressure storage chamber into the low-pressure region 18.
  • the actuating piston 9 penetrates into the compensating volume of the hydraulic chamber 13 as the temperature rises or withdraws therefrom when the temperature drops, without that this affects has the closed and open position of the valve member 3 and the fuel valve 1 as a whole.
  • the piezoelectric actuator 4 When the fuel injection valve 1 is to be injected, the piezoelectric actuator 4 is charged, as a result of which the axial expansion of the actuator is suddenly increased. This elongation of the piezoelectric actuator 4 is transmitted to the actuating piston 12 via the actuating piston 9 and the hydraulic chamber 13, as a result of which the valve closing member 11 is lifted out of the first, upper valve seat 14 and is moved against the applied rail pressure against the second, lower valve seat 15 , If the actuating piston 12 with its taper 21 now reaches the area in which the balls 24 of the sliding device 23 are arranged, the control valve experiences a braking force directed against the direction of movement of the valve closing member 11, which leads to stabilization around this position.
  • FIG. 3 shows, in an extremely simplified manner, a course of this braking force which occurs with the engagement between the taper 21 of the actuating piston 12 and the spring device 20 and which has its maximum in the central position h_middle of the valve closing member 11.
  • valve closing member 11 When the piezoelectric actuator 4 is discharged, the valve closing member 11 is now moved in the opposite direction with the support of the rail pressure, wherein the engagement of the spring device 20 in the taper 21 of the actuating piston 12, as described above, in turn stabilizes the valve closing member 11 in its central position ,
  • the piezoelectric actuator is generally controlled in such a way that it is charged or discharged to an intermediate voltage level for injection.
  • the resulting actuator stroke ensures that the control valve can be positioned approximately centrally between the seats.
  • the device according to the invention ensures that this middle position can be maintained safely and with high precision.
  • FIG. 4 a further exemplary embodiment of the fuel injection valve 1 is shown, in which, for reasons of clarity, functionally identical components are designated by the reference symbols used previously.
  • the spring device 20 shown here differs in that a spring 28 in the valve chamber 17 of the valve is arranged on the one hand at the end of the valve chamber 17 associated with the second valve seat 15 and on the other hand against a stop 29 in a region between the first valve seat 14 and the second valve seat 15.
  • the spring 28 is positioned such that its spring force dampens the actuating movement of the valve closing member 11 from the first valve seat 14 into the second valve seat 15 once it has reached its intermediate position.

Landscapes

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

Abstract

Soupape (1) de régulation de liquides qui comporte une unité piézo-électrique (4) destinée à actionner un élément (3) de soupape mobile axialement dans un alésage (10) du corps (7) de soupape. Ledit élément (3), en plusieurs parties, est constitué d'un piston de réglage (9) adjacent à l'unité (4) piézo-électrique et d'un piston d'actionnement (12) adjacent à un obturateur (11) de soupape, une chambre hydraulique (13) étant située entre lesdits pistons. L'alésage (10) débouche dans une chambre (17) de soupape dans laquelle l'obturateur (11) de soupape est mobile entre un premier siège (14) de soupape délimitant une zone à basse pression (18) et un second siège (15) de soupape conduisant à une zone à haute pression (19). Dans sa position intermédiaire, l'obturateur (11) de soupape est stabilisé par un dispositif à ressort (20) qui coopère avec un rétrécissement (21) ménagé dans l'élément (3) de soupape. La partie rétrécie (21) et le dispositif à ressort (20) sont emboîtés l'un dans l'autre quand l'obturateur (11) de soupape se trouve dans sa position intermédiaire.
PCT/DE2000/004104 2000-01-20 2000-11-21 Soupape de regulation de liquides WO2001053689A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00989780A EP1165956A1 (fr) 2000-01-20 2000-11-21 Soupape de regulation de liquides
JP2001553526A JP2003520326A (ja) 2000-01-20 2000-11-21 液体を制御する弁

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10002271.5 2000-01-20
DE10002271A DE10002271A1 (de) 2000-01-20 2000-01-20 Ventil zum Steuern von Flüssigkeiten

Publications (1)

Publication Number Publication Date
WO2001053689A1 true WO2001053689A1 (fr) 2001-07-26

Family

ID=7628117

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2000/004104 WO2001053689A1 (fr) 2000-01-20 2000-11-21 Soupape de regulation de liquides

Country Status (6)

Country Link
EP (1) EP1165956A1 (fr)
JP (1) JP2003520326A (fr)
CZ (1) CZ20013358A3 (fr)
DE (1) DE10002271A1 (fr)
HU (1) HUP0200510A2 (fr)
WO (1) WO2001053689A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10045214A1 (de) * 2000-09-13 2002-03-28 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
CN112387530B (zh) * 2020-10-26 2021-07-09 深圳市腾盛精密装备股份有限公司 一种新型精密压电喷射阀

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707303A (en) * 1971-03-10 1972-12-26 Petri Johnson Inc Means for securing an insert to a base piece
US4166577A (en) * 1976-05-04 1979-09-04 Plessey Handel Und Investments Ag Liquid injection device
US4453449A (en) * 1981-09-10 1984-06-12 Westinghouse Electric Corp. Holding apparatus
DE19732802A1 (de) 1997-07-30 1999-02-04 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE19742073A1 (de) * 1997-09-24 1999-03-25 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3707303A (en) * 1971-03-10 1972-12-26 Petri Johnson Inc Means for securing an insert to a base piece
US4166577A (en) * 1976-05-04 1979-09-04 Plessey Handel Und Investments Ag Liquid injection device
US4453449A (en) * 1981-09-10 1984-06-12 Westinghouse Electric Corp. Holding apparatus
DE19732802A1 (de) 1997-07-30 1999-02-04 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE19742073A1 (de) * 1997-09-24 1999-03-25 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen

Also Published As

Publication number Publication date
JP2003520326A (ja) 2003-07-02
DE10002271A1 (de) 2001-08-02
HUP0200510A2 (en) 2002-06-29
CZ20013358A3 (cs) 2003-02-12
EP1165956A1 (fr) 2002-01-02

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