EP1327065B1 - Module de commande actionne par electrovanne pour effectuer des controles fluidiques dans des systemes d'injection - Google Patents

Module de commande actionne par electrovanne pour effectuer des controles fluidiques dans des systemes d'injection Download PDF

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Publication number
EP1327065B1
EP1327065B1 EP01978189A EP01978189A EP1327065B1 EP 1327065 B1 EP1327065 B1 EP 1327065B1 EP 01978189 A EP01978189 A EP 01978189A EP 01978189 A EP01978189 A EP 01978189A EP 1327065 B1 EP1327065 B1 EP 1327065B1
Authority
EP
European Patent Office
Prior art keywords
valve body
control module
control
valve
recesses
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.)
Expired - Lifetime
Application number
EP01978189A
Other languages
German (de)
English (en)
Other versions
EP1327065A1 (fr
Inventor
Nestor Rodriguez-Amaya
Uwe Schmidt
Ramon Junker
Hubert Greif
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 EP1327065A1 publication Critical patent/EP1327065A1/fr
Application granted granted Critical
Publication of EP1327065B1 publication Critical patent/EP1327065B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M63/0017—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
    • 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

Definitions

  • An injection system configured to comply with legal requirements requires actuators which, on the one hand, must have a long service life and, on the other hand, a high level of operational reliability.
  • short control valve activation times must be able to be realized via the actuators;
  • piezo actuators are used in injection systems, short response and switching times for control valves of an injection system can be realized. However, it is still unclear whether the piezo actuators already used have the durability required for an injection system and whether the operational reliability is still present after prolonged operation.
  • the piezo actuators are exposed to the operation of internal combustion engines, especially when used on commercial vehicles internal combustion engines, the toughest conditions of use, such as temperature fluctuations and shocks.
  • Commercial vehicles are usually designed for a service life of 1 million and more kilometers, so that the durability of an injection system is also interpreted to this lifetime.
  • EP 0 823 549 A2 discloses an injector for an injection system on internal combustion engines.
  • Injektorgepatuse according to this technical solution are two consecutively lying control valves arranged, which are controlled by a magnet. The control of one of the two valves forcibly pulls the operation of the other valve after.
  • the advantage of this solution is the pressure balance of the needle control valve in all operating conditions, whereas this solution entails the disadvantage that a decoupling of the lifting operations of the two valves connected in series is not possible, so that the possibilities of influencing the formation of the injection curve are limited.
  • US 6,113,014 relates to an electronically controlled device, such as a fuel injector, having first and second electromagnets. These are attached to an injector body. An overflow valve and a needle valve are actuatable by the solenoids in the injector body, thereby causing pressure build-up or pressure relief of control chambers. The solenoids of the electromagnets are received in recesses of insert elements on the valve body.
  • US 4,856,713 has a fuel injector to the object, both to. Injecting fuel as well as for injecting solid particles contained in the fuel is suitable.
  • the fuel injector includes an actuator for injecting fuel and an actuator for injecting fuel containing the solid particles. Depending on the desired requirement, either one or the other actuator is activated.
  • EP 0987 430 is directed to a pump injector, wherein both an overflow valve and a control valve may be opened to stop the injection of fuel.
  • a relatively high pressure acts on a contact piston of the valve needle, so that it is in contact with its seat.
  • the contact piston partially limits a control chamber, while the control valve controls the connection between the pump chamber and the control chamber.
  • the spill valve and the control valve are moved by electromagnetic actuators which are arranged in an insert of the valve body.
  • US 5,771,865 relates to a fuel injector comprising an injector and a device to pressurize the fuel.
  • the pressurized fuel is supplied to the injector via a fuel path comprising a control space and optionally returned to a fuel tank via a return.
  • the fuel path has solenoid valves arranged in series or in parallel with each other, which control the start and the end of a fuel injection.
  • US 5,494,219 discloses a control valve device for a fuel injector. Includes a poppet valve which controls the flow of fluid through a valve seat. A pair of actuators that are selectively operable move the poppet valve between a closed and an open valve position. By a sequential or simultaneous actuation of the actuators a split fuel injection is possible.
  • the actuators are arranged in an insert element and connected to the valve body.
  • the solution proposed according to the invention offers the advantage of providing a compact control module by means of a miniaturized control sub-design.
  • the durability and reliability of electromagnets used as a switching device is an undisputed and generally accepted technical fact. Due to the miniaturization of the components with a corresponding flux density to be realized in the electromagnetic coil in cooperation with the magnet yoke surrounding the coil, such a degree of compactness of the control module is achieved in an injection system that the accommodation of such a control module in existing systems, for example on commercial vehicle engines without serious space changes is possible.
  • the actuators of the control module designed as electromagnets can be switched depending on the function so that both control valves of the control module are normally closed or switch both control valves to the open position without current. This is preferably done by on the Steuerventilkörpem the Control valves provided provided spring elements. However, it is also possible to keep one of the two control valves normally closed, and to put the other control valve de-energized in the opening state.
  • the application possibilities and the space requirement favorably influencing embodiment of the present invention proposed control module can be the magnetic yoke - the non-moving part of the solenoid - either in the valve body of the control module by appropriate recess to accommodate the coil.
  • the material of the valve body at the same time use as a magnetic conductor.
  • the solenoid coils receiving separate inserts are installed in the valve body of a control module, so they can connect to the valve body by various methods.
  • a pressing or pinching the cup-shaped, the magnetic coils surrounding insert elements in the valve body can be imagined.
  • a positive connection of the insert element, the recess for the magnetic coil receiving insert element with the valve body by fuel-efficient connection, such as soldering or welding done.
  • valve needles for both needles can be made in the same diameter.
  • identical manufacturing methods can be used, also can be influenced by the principle of the same parts inventory storage and the storage costs positive.
  • FIG. 1 shows in more detail a section through the control module proposed according to the invention with electromagnets actuated parallel thereto but offset in height from each other for the valve control bodies.
  • FIG. 1 shows that in a symmetrical to its symmetry axis 3 recorded valve body 2 of the control module 1, two mutually parallel control valves 5, 17 are added.
  • the valve needle 6 is designed as a rotationally symmetrical component, symmetrical to the symmetry line 11.
  • an annular armature 7 is received, the valve needle 6 above a this executed taper 8 encloses the entire surface.
  • a circumferential recess 9 is formed for receiving the magnetic coil of an electromagnet.
  • the area surrounding the recess 9 in the valve body 2 of the valve body 2 can therefore be regarded as the magnetic yoke of the electromagnet.
  • a leakage oil space 10 surrounding the constriction point of the valve needle 6 is formed.
  • valve body 2 Above the leakage oil chamber 10 is located in the valve body 2, which is closed by the seat surface of the valve needle 6 valve seat 12, via which the valve body 2 formed in the annular space 14 can be depressurized.
  • a dome 15 At the lower end of the valve needle 6, a dome 15 is formed, which serves as a guide surface for the first turns of a spring element 16, which is also mounted as a return element in the valve body 2.
  • a second control valve 17 is also included, which is arranged vertically offset with respect to the already described first control valve 5.
  • a bore 18 is received, in which an annular configured insert element 19 is inserted.
  • the annular configured insert element 19 which consists of a high-quality, soft magnetic material, there is a recess 20 for the coil of an electromagnet.
  • the annular configured insert element 19 is penetrated by a bore into which a sleeve is inserted.
  • a compression spring element is supported on the one hand on a ring 21 fastened to the sleeve and on the other hand is guided in a mandrel-shaped extension 22 which is formed on the valve needle 24 of the second control valve 17.
  • the valve needle 24 of the second control valve 17 is provided with a plate-shaped element, a valve plate 23, which can be moved up and down in the vertical direction by the electromagnet whose coil is received in the recess 20 of the insert element 19.
  • valve body 2 Coaxially to the axis of symmetry 3 of the valve body 2 is located in the valve body 2, an injector piston 31, the tapered end of which protrudes into a control space designated by reference numeral 30.
  • the control chamber 30 has an inlet, not shown, and a ring outlet 28, in which a throttle element 29 can be inserted.
  • the annular space drain 28 opens into the annular space 25, which surrounds the lower region of the valve needle 24 of the second control valve 17. From the annular space 25 branches off the flow 27, via which the control volume 30 exiting from the control chamber runs into a reservoir. 2, a control module according to FIG. 1 is shown in more detail, in which a separate receiving element for a magnetic coil in the valve body is embedded in one of the control valves.
  • the first control valve 5 activating solenoid, ie its magnetic coil in recesses 9 of an insert member 32 which is largely surrounded by the valve body 2.
  • the insert element 32 this can be made of high quality, soft magnetic material.
  • the material of serving as a magnetic yoke insert element can be 32 provided with slot-shaped extending in the axial direction recesses.
  • slot-shaped configured recesses can be formed on the insert element or in the valve body 2 in the region of the recesses 9 for receiving the magnet coils 4.
  • the insert element 32 as shown in FIG. 2 can either be screwed in the valve body 2, pressed into this, clamped in this or welded or soldered to this, to enter into a permanent connection with the valve body 2 of the control module 1.
  • a control space 30 is formed in a height offset 34 of the control valves 5 and 17, respectively, of an embodiment variant of the control module 1 according to the invention, in which the conically tapered end of an injector piston 31 protrudes.
  • the control chamber 30 in the valve body 2 can be relieved of pressure via the annular space inlet 28, the annular space 25, the second control valve 17 and the outlet 27 connected thereto.
  • the illustration according to FIG. 3 shows that the two control valves 5 and 17 accommodated in the valve body 2 of the control module 1 are exactly identical to one another.
  • the valve needles 6 and 24 of the first control valve 5 and the second control valve 17 are designed in the same diameter, so that a production of the inventively proposed control module according to the illustration of FIG. 3 can be realized according to the common part principle.
  • the use of identical parts is particularly easy to manufacture and helps to keep the production costs low.
  • a cup-shaped needle receiving element 36 is associated with the lower end, which is supported on the valve body 2 - not shown here - below.
  • FIG. 3 shows that the magnetic coils of the control valves 5 and 17 are actuated or activating electromagnets in recesses 9 of insert elements 32 are enclosed.
  • the magnetic coils are accommodated in separate internals in the valve body 2.
  • the insert elements 32 can be embedded side by side in the valve body 2. Both insert elements 32 can Be equal components, both insert elements 32 preferably consist of a magnetic yoke serving high quality, soft magnetic material.
  • the insert elements 32 in the recesses 9, the solenoid coils of the electromagnets are received, screwed to the valve body 2, pressed into this or jammed with this. Also, a positive connection between the valve body 2 and insert member 32, for example by welding and soldering, is conceivable.
  • the configuration of the annular spaces 14 and 25, the leakage oil chambers 10, the corresponding sealing seats 13 and 26 and the arrangement of injector piston 31, control chamber 30 in the valve body, as well as annulus inlet 28 and annulus 27 are identical to those already outlined in Figs configurations.
  • a particularly low-profile configuration of a control module 1 for fluid control can be realized, for example, in injection systems injecting high pressure fuel, in which the recesses 9 accommodating the magnetic coils are formed directly in the valve body 2.
  • the material of the valve body 2 can be used advantageously as a magnetic conductor.
  • the height of the valve body increasing insert elements 32 made of high quality, soft magnetic material can be omitted.
  • FIG. 4 shows a particularly compact design embodiment of a control module 1, wherein the recesses 9 for the solenoid of the valve needles 6 and 24 approximately centrally surrounding annular space 14 and 25, the adjoining sealing seat 12 and 26 and the thereto subsequent leakage oil spaces 10 are arranged particularly close to each other lying.
  • the injector piston is formed coaxially with the axis of symmetry 3 of the valve body 2.
  • the spring elements 16 are each located in the upper region of the valve body 2 in the embodiment variant according to FIG penetrated by the valve needles 6 and 24 and are to avoid kinking on the insides of holes in the insert elements 32 at.
  • the insert elements 32 have annularly extending recesses 9 which receive the magnetic coils of the control valves 5 and 17 actuated electromagnets.
  • the insert elements 32 can be made of high quality, soft magnetic material; Furthermore, the insert elements 32 according to the already mentioned methods of screwing, welding, soldering or pressing or jamming with the valve body 2 of the control module 1 permanently connect.
  • valve body 2 can be optimized such that the material surrounding the magnetic coils of the electromagnets can be selected optimally in terms of its magnetic properties independently of the material of the valve body 2.
  • the two control valves 5 and 17 are configured as equal components and do not differ from each other in terms of diameter and attachment parts. Only in the housing formed in the valve body 2 annular spaces 14 and 25, which surround the valve needles 6 and 24 in the lower region, differ through the mouth of an annular space inlet 28 and an annular space 27, which are associated with the annular space 25 of the second control valve 17 ,
  • FIGS. 3, 4 and 5 embodiments of a control module 1 are shown in more detail, in which the two control valves 5 and 17 contained therein are arranged symmetrically with respect to one another and have the same overall height. Furthermore, the two control valves 5 and 17, d. H. their valve needles 6 and 24 same production diameter, so that the same parts can be used.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un module de commande pour effectuer des contrôles fluidiques dans des systèmes d'injection, qui comprend un corps de vanne (2) dans lequel se trouvent des pointeaux (6, 24) de soupapes de commande (5, 17). Ces soupapes de commande (5, 17) permettant d'influer sur la formation de pression et la détente de la pression des chambres de commande (30) ou des chambres d'ajutages sur des injecteurs. Les soupapes de commande (5, 17) dans le corps de soupape (2) sont à commande électromagnétique, les bobines d'excitation étant logées dans des cavités (9, 20) d'éléments de fonctionnement (19, 32) ou dans des cavités (9) du corps de soupape même.

Claims (9)

  1. Module de commande pour effectuer des contrôles fluidiques dans des systèmes d'injection, comportant un corps de soupape (2) logeant des aiguilles (6, 24) de soupapes de commande (5, 17) qui permettent d'influer sur la montée en pression ou le délestage de pression de chambres de commande (30) ou de chambres d'injection sur des injecteurs, les soupapes de commande (5, 17) présentes dans le corps de soupape (2) pouvant être actionnées par voie électromagnétique, et les bobines magnétiques logeant dans des évidements (9) du corps de soupape (2) ou dans des évidements (9, 20) d'éléments d'insertion (19, 32) sur le corps de soupape (2),
    caractérisé en ce que
    les évidements (9, 20) présentent des rainures multiples visant à améliorer la dynamique de commutation des bobines magnétiques.
  2. Module de commande selon la revendication 1,
    caractérisé en ce que
    les bobines magnétiques actionnant les soupapes de commande (5, 17) logent dans des évidements (9) du corps de soupape (2) du module de commande.
  3. Module de commande selon la revendication 1,
    caractérisé en ce que
    les bobines magnétiques actionnant les soupapes de commande (5, 17) logent dans des évidements (9, 20) d'éléments d'insertion (19, 32) présents au niveau du corps de soupape (2) servant de culasse magnétique.
  4. Module de commande selon la revendication 3,
    caractérisé en ce que
    les éléments d'insertion (19, 32) du corps de soupape (2) servant de culasse magnétique sont fabriqués dans un matériau magnétique doux de haute qualité.
  5. Module de commande selon la revendication 1,
    caractérisé en ce que
    le rainurage est réalisé sous la forme de rainures traversantes à prolongement axial.
  6. Module de commande selon la revendication 5,
    caractérisé en ce que
    quatre rainures, de préférence, sont conçues dans le corps de soupape (2) ou les éléments d'insertion (19, 32).
  7. Module de commande selon la revendication 1,
    caractérisé en ce que
    les éléments d'insertion (19, 32) logent dans le corps de soupape (2) en y étant serrés, emmanchés à force, assemblés à force ou par complémentarité de forme.
  8. Module de commande selon la revendication 2,
    caractérisé en ce que
    les évidements (9) dans lesquels logent les bobines magnétiques et qui appartiennent aux aimants actionnant les deux soupapes de commande (5, 17) sont réalisés dans le corps de soupape (2) en présentant un décalage en hauteur (34).
  9. Module de commande selon la revendication 2 ou 3,
    caractérisé en ce que
    les soupapes de commande (5, 17) et les aimants qui les actionnent sont parallèles et de mêmes hauteurs structurelles.
EP01978189A 2000-10-11 2001-09-28 Module de commande actionne par electrovanne pour effectuer des controles fluidiques dans des systemes d'injection Expired - Lifetime EP1327065B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10050238A DE10050238A1 (de) 2000-10-11 2000-10-11 Magnetventilbetätigtes Steuermodul zur Fluidkontrolle bei Einspritzsystemen
DE10050238 2000-10-11
PCT/DE2001/003737 WO2002031342A1 (fr) 2000-10-11 2001-09-28 Module de commande actionne par electrovanne pour effectuer des controles fluidiques dans des systemes d'injection

Publications (2)

Publication Number Publication Date
EP1327065A1 EP1327065A1 (fr) 2003-07-16
EP1327065B1 true EP1327065B1 (fr) 2007-06-06

Family

ID=7659332

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01978189A Expired - Lifetime EP1327065B1 (fr) 2000-10-11 2001-09-28 Module de commande actionne par electrovanne pour effectuer des controles fluidiques dans des systemes d'injection

Country Status (5)

Country Link
US (1) US7063077B2 (fr)
EP (1) EP1327065B1 (fr)
JP (1) JP2004511698A (fr)
DE (2) DE10050238A1 (fr)
WO (1) WO2002031342A1 (fr)

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US6702207B2 (en) * 2002-07-16 2004-03-09 Robert Bosch Gmbh Fuel injector control module with unidirectional dampening
US6565020B1 (en) 2002-07-16 2003-05-20 Detroit Diesel Technology Electromagnetic actuator and stator design in a fuel injector assembly
DE10304742A1 (de) * 2003-02-06 2004-08-19 Robert Bosch Gmbh Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
US6776139B1 (en) 2003-02-25 2004-08-17 Robert Bosch Gmbh Fuel injector assembly having multiple control valves with a single actuator
DE102004028523A1 (de) * 2004-06-11 2005-12-29 Robert Bosch Gmbh Kraftstoffinjektor mit Spannhülse als Anschlag für Ventilnadel
US20060202053A1 (en) * 2005-03-09 2006-09-14 Gibson Dennis H Control valve assembly and fuel injector using same
US20100140519A1 (en) * 2008-12-04 2010-06-10 General Electric Company Electromagnetic actuators
US8145429B2 (en) 2009-01-09 2012-03-27 Baker Hughes Incorporated System and method for sampling and analyzing downhole formation fluids
DE102012023027B3 (de) * 2012-11-26 2014-03-27 L'orange Gmbh Kraftstoffinjektor

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Also Published As

Publication number Publication date
WO2002031342A1 (fr) 2002-04-18
DE50112607D1 (de) 2007-07-19
EP1327065A1 (fr) 2003-07-16
US7063077B2 (en) 2006-06-20
JP2004511698A (ja) 2004-04-15
US20030102391A1 (en) 2003-06-05
DE10050238A1 (de) 2002-04-25

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