EP0914557B1 - Magnetventil, zum beispiel stossventil für eine druckstosseinspritzanordnung von kraftstoff in einem kraftfahrzeugmotor - Google Patents

Magnetventil, zum beispiel stossventil für eine druckstosseinspritzanordnung von kraftstoff in einem kraftfahrzeugmotor Download PDF

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Publication number
EP0914557B1
EP0914557B1 EP97931890A EP97931890A EP0914557B1 EP 0914557 B1 EP0914557 B1 EP 0914557B1 EP 97931890 A EP97931890 A EP 97931890A EP 97931890 A EP97931890 A EP 97931890A EP 0914557 B1 EP0914557 B1 EP 0914557B1
Authority
EP
European Patent Office
Prior art keywords
outlet
valve body
plunger core
plunger
fuel
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
EP97931890A
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English (en)
French (fr)
Other versions
EP0914557A1 (de
Inventor
Cornel Stan
Jean-Louis Lefebvre
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.)
Peugeot Motocycles SA
Original Assignee
Peugeot Motocycles SA
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Filing date
Publication date
Application filed by Peugeot Motocycles SA filed Critical Peugeot Motocycles SA
Publication of EP0914557A1 publication Critical patent/EP0914557A1/de
Application granted granted Critical
Publication of EP0914557B1 publication Critical patent/EP0914557B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • 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
    • 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
    • F02M63/06—Use of pressure wave generated by fuel inertia to open injection valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/2003—Output circuits, e.g. for controlling currents in command coils using means for creating a boost voltage, i.e. generation or use of a voltage higher than the battery voltage, e.g. to speed up injector opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/20—Output circuits, e.g. for controlling currents in command coils
    • F02D2041/202—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit
    • F02D2041/2037—Output circuits, e.g. for controlling currents in command coils characterised by the control of the circuit for preventing bouncing of the valve needle

Definitions

  • the present invention relates to a solenoid valve for example of impact for a fuel injection system by water hammer in a vehicle engine.
  • direct fuel injection into a engine combustion has a number of advantages, especially for two-stroke engines, in which the separation of oxidant and fuel allows to carry out the scanning phase without loss of the latter, unlike carburetor feed solutions for example.
  • the energy required for such an increase pressure must be supplied by the engine itself or by an annexed energy source on board on board the vehicle if the application concerns a vehicle.
  • a so-called solenoid valve is connected to the fuel injector in the motor, to create by successive opening and closing of it, fuel pressure waves at the level of the injector.
  • the solenoid valves and in particular impact solenoid valves for such systems have a tubular valve body having at its ends, a fuel inlet and outlet and in which an electromagnet coil is arranged associated with a tubular magnetic piece and a core tubular plunger.
  • This magnetic part and this plunger core are arranged one in the extension of the other, in the recess of the electromagnet coil and the plunger core is connected to means for closing the outlet of the body valve to control the opening and closing of this in response to a command to power the solenoid coil, by axial displacement of the plunger core relative to the magnetic part, and coming to bear contact surfaces opposite this magnetic part and this plunger core.
  • the object of the invention is therefore to solve these problems.
  • the invention relates to a solenoid valve for example of impact for an injection system of fuel by water hammer in a vehicle engine, of the type comprising a tubular valve body having at its ends, a fuel inlet and outlet, and in which is arranged a connected electromagnet coil to means for supplying it and associated with a tubular magnetic part and a tubular plunger core, arranged in the extension of one another in the recess of the electromagnet coil, and having facing contact surfaces, the plunger being connected to means for closing the outlet of the valve body for, in response to the excitation or not of the electromagnet coil under the control of the means of supply of this, open or close the valve body outlet, by axial displacement of the plunger with respect to the workpiece magnetic and coming into contact with their contact surfaces in the valve body outlet open position, and elastic biasing means of the plunger core in closed position of the valve body outlet, the means for controlling the supply of the electromagnet coil being adapted to apply current thereto presenting a call phase and a hold phase,
  • a solenoid valve designated by the general reference 1 which can be used as an impact solenoid valve for a system fuel injection by water hammer in a vehicle heat engine.
  • the solenoid valve according to the invention comprises conventionally, a tubular valve body designated by the general reference 2 having at its ends, a fuel inlet and outlet, respectively 3 and 4.
  • valve body there is a coil electromagnet designated by the general reference 5, this electromagnet coil being associated with a part tubular magnetic designated by the general reference 6 and a tubular plunger core designated by the reference general 7.
  • this electromagnet coil is connected to means for controlling its supply designated by the reference 5a in this figure 1.
  • the magnetic part 6 and the plunger core 7 are arranged one in the extension of the other, in the recess of the electromagnet coil between the input and the fuel outlet and the plunger core 7 is connected to means 8 for closing the outlet 4 of the body of valve 2, to control the opening and closing of this in response to a command to power the solenoid coil 5, by axial displacement of the core plunger 7 with respect to the magnetic part.
  • the sealing means may present different suitable forms known in the state of technical.
  • output 4 of this body valve can be associated with a nozzle 9 having by example a flared recess, either in stages as is represented, either continuously.
  • means 10 for guiding the displacements of the plunger core 7 and the elastic means 11 for biasing this plunger core in the position of closure of the shutter means 8, are also provided.
  • the means 10 for guiding the movements of the plunger core include for example a sleeve tubular guide including a first end for example 10a extends into the magnetic part 6 and of which a second end for example l0 protrudes beyond this magnetic piece.
  • the plunger core 7 is then placed on this second end 10b of the guide sleeve 10 and is therefore mounted movable to slide around this end of the guide sleeve.
  • the elastic means 11 of stress on this plunger core in the closed position from the valve body outlet are also arranged in the recess thereof, in the extension of the guide sleeve between the second end of this and a corresponding abutment surface, by example 7a, of the plunger core.
  • these means elastic can include a spring for example helical arranged in the plunger core, in the extension of the guide sleeve, one end of this helical spring 11 bearing on the end the guide sleeve, while the other end of it is in abutment on the abutment surface 7a of the plunger core.
  • This structure presents a number advantages, especially in terms of its simplicity of construction and operation.
  • the guide means no longer form an obstacle to the magnetic flux lines of the coil electromagnet, as was the case in the state of the technique, which improves the magnetic efficiency from the whole.
  • the optimization of the layout guide means and elastic biasing means of the plunger also reduces the size of the solenoid valve and limit as much as possible the risks of blocking the plunger, while allowing it to operate at very high rates like those encountered in one of the applications previously mentioned, i.e. systems fuel injection into vehicle engines.
  • a fuel injector (not shown) can be connected via example of a line 12 at the solenoid valve, upstream of the sealing means, thanks to connection means any generally designated by reference 13 on the face.
  • the part magnetic 6 and the plunger core 7 have surfaces contact respectively 6a, 7b opposite, adapted to come into contact with one another, when opening from the valve body outlet after the excitation of the electromagnet coil 5 by the control means 5a.
  • One or both of these contact surfaces have advantageously protruding and recessed parts which reduce the area of these bearing surfaces one against the other, when the plunger is in opening position of the valve body outlet.
  • the corresponding surface 6a of the part magnetic 6 indeed has an annular shoulder continuous 6b.
  • This configuration reduces the forces residual between magnetic part 6 and the core plunger 7, which are relatively large, and this especially when the valve body closes, these residual forces limiting the generation of the fuel pressure and operating frequencies of this valve, by increasing the closing time of the solenoid valve.
  • FIG. 2 shows, the shape of the average current I applied by the means of Sa control in the electromagnet coil 5 when excitation.
  • the current I, at the end of the call phase A presents a slope reduced compared to that of the beginning of this one, this which reduces the impact of the plunger core 7 on the magnetic piece 6 when opening the outlet of the valve body and therefore the risk of degradation of these rooms.
  • this current I has indeed two slopes designated by A1 and A2 respectively in this figure, for the start and end of the call phase A thereof.
  • phase A1 the current has a relatively steep slope, while that during phase A2, the current has a slope reduced compared to that of the first part of this phase.
  • slope current can be considered and this can by example present a gradually decreasing slope and continuously towards the end of this call phase.
  • the current I presents a positive slope and increases slightly for compensate for the increase in hydrodynamic force exerted by the fuel on the plunger, as and as the speed of the fuel in the body of valve increases.
  • control means having any structure for example classic programmable.

Landscapes

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

Claims (2)

  1. Elektroventil, zum Beispiel Stoßventil für ein Druckstoß-Kraftstoffeinspritzsystem in einem Kraftfahrzeugmotor, der Bauart, die einen rohrförmigen Ventilkörper (2), der an seinen Enden einen Einlaß- (3) und einen Auslaß (4) für Kraftstoff aufweist und in dem eine Elektromagnetspule (5) angeordnet ist, die mit ihrer Versorgungseinrichtung (5a) verbunden ist und mit einem rohrförmigen Magnetstück (6) und einem rohrförmigen Tauchmagnetanker (7) in Verbindung ist, die jeweils in ihrer Verlängerung in dem Hohlraum der Elektromagnetspule angeordnet sind und die gegenüberliegende Kontaktoberflächen (6a, 7b) aufweisen, wobei der Tauchmagnetanker (7) mit einer Verschlußeinrichtung (8) des Auslasses des Ventilkörpers (2) verbunden ist, um ansprechend auf die Erregung oder Nicht-Erregung der Elektromagnetspule unter Steuerung ihrer Versorgungseinrichtung den Auslaß des Ventilkörpers durch axiale Verschiebung des Tauchmagnetankers (7) relativ zu dem Magnetstück (6) und dadurch, daß deren Kontaktoberflächen (6a, 7b) in der Öffnungsposition des Auslasses des Ventilkörpers in Anlage kommen, zu öffnen oder zu schließen, sowie eine Einrichtung (11) zur elastischen Beaufschlagung des Tauchmagnetankers in der Schließposition des Auslasses des Ventilkörpers enthält, wobei die Steuereinrichtung (5a) zur Versorgung der Elektromagnetspule (5) so ausgelegt ist, daß sie an diese einen Strom (I) anlegt, der eine Stromstoß-Phase (A) und eine Halte-Phase (M) aufweist, wobei der Strom am Ende der Stromstoß-Phase eine Steigung (A2) aufweist, die im Vergleich zu der Steigung (A1) an ihrem Beginn reduziert ist, um den Aufschlag des Tauchmagnetankers (7) auf das Magnetstück (6) beim Öffnen des Auslasses des Ventilkörpers und damit das Verschleißrisiko dieser Teile zu mindern, dadurch gekennzeichnet, daß der Strom (I) während der Halte-Phase (M) eine positive Steigung aufweist, um die Erhöhung der hydrodynamischen Kraft auszugleichen, die vom Kraftstoff auf den Tauchmagnetanker (7) in dem Maße ausgeübt wird, in dem dessen Geschwindigkeit in dem Ventilkörper zunimmt.
  2. Magnetventil nach Anspruch 1, dadurch gekennzeichnet, daß mindestens eine der Kontaktoberflächen (6a, 7b) des Magnetstücks (6) und/oder des Tauchmagnetankers (7) überstehende und vertiefte Teile enthält, um die Auflagefläche der Oberflächen aufeinander zu reduzieren, wenn sich der Tauchmagnetanker (7) in der Öffnungsposition des Auslasses des Ventilkörpers befindet.
EP97931890A 1996-07-23 1997-07-07 Magnetventil, zum beispiel stossventil für eine druckstosseinspritzanordnung von kraftstoff in einem kraftfahrzeugmotor Expired - Lifetime EP0914557B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9609243 1996-07-23
FR9609243A FR2751700B1 (fr) 1996-07-23 1996-07-23 Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule
PCT/FR1997/001224 WO1998003789A1 (fr) 1996-07-23 1997-07-07 Electrovanne par exemple d'impact pour un systeme d'injection de carburant par effet de coup de belier dans un moteur de vehicule

Publications (2)

Publication Number Publication Date
EP0914557A1 EP0914557A1 (de) 1999-05-12
EP0914557B1 true EP0914557B1 (de) 2002-03-20

Family

ID=9494369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97931890A Expired - Lifetime EP0914557B1 (de) 1996-07-23 1997-07-07 Magnetventil, zum beispiel stossventil für eine druckstosseinspritzanordnung von kraftstoff in einem kraftfahrzeugmotor

Country Status (7)

Country Link
EP (1) EP0914557B1 (de)
AT (1) ATE214788T1 (de)
AU (1) AU3548297A (de)
DE (1) DE69711186T2 (de)
ES (1) ES2172802T3 (de)
FR (1) FR2751700B1 (de)
WO (1) WO1998003789A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2333132A (en) * 1997-08-02 1999-07-14 Lucas Ind Plc Spill valve control method.
DE102004019152B4 (de) * 2004-04-21 2007-05-31 Robert Bosch Gmbh Verfahren zum Betreiben eines Magnetventils zur Mengensteuerung
FR2941781B1 (fr) * 2009-02-05 2011-03-04 Peugeot Citroen Automobiles Sa Procede de diagnostic de l'etat d'une electrovanne

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD105653A1 (de) * 1973-07-13 1974-05-05
JPS57163784A (en) * 1981-04-01 1982-10-08 Komatsu Ltd Solenoid valve driving circuit
IT1175561B (it) * 1984-07-12 1987-07-01 Spica Spa Elettroiniettore perfezionato per alimentare combustibile a un motore a c.i.
DE3616356A1 (de) * 1986-05-15 1987-11-19 Vdo Schindling Verfahren und schaltungsanordnung zur ansteuerung eines einspritzventils
DE4106015A1 (de) * 1991-02-26 1992-08-27 Ficht Gmbh Druckstoss-kraftstoffeinspritzung fuer verbrennungsmotoren
IT1251259B (it) * 1991-12-23 1995-05-05 Elasis Sistema Ricerca Fiat Circuito di comando di carichi prevalentemente induttivi, in particolare elettroiniettori.

Also Published As

Publication number Publication date
DE69711186D1 (de) 2002-04-25
DE69711186T2 (de) 2002-08-14
FR2751700B1 (fr) 1998-10-30
ATE214788T1 (de) 2002-04-15
FR2751700A1 (fr) 1998-01-30
ES2172802T3 (es) 2002-10-01
AU3548297A (en) 1998-02-10
WO1998003789A1 (fr) 1998-01-29
EP0914557A1 (de) 1999-05-12

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