EP0615064A1 - Système de commande d'une soupape d'injection d'un moteur à combustion interne - Google Patents

Système de commande d'une soupape d'injection d'un moteur à combustion interne Download PDF

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Publication number
EP0615064A1
EP0615064A1 EP94102943A EP94102943A EP0615064A1 EP 0615064 A1 EP0615064 A1 EP 0615064A1 EP 94102943 A EP94102943 A EP 94102943A EP 94102943 A EP94102943 A EP 94102943A EP 0615064 A1 EP0615064 A1 EP 0615064A1
Authority
EP
European Patent Office
Prior art keywords
valve
control arrangement
arrangement according
closing
housing
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
EP94102943A
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German (de)
English (en)
Other versions
EP0615064B1 (fr
Inventor
Marco A. Ganser
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.)
Ganser Hydromag AG
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Ganser Hydromag AG
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Publication of EP0615064A1 publication Critical patent/EP0615064A1/fr
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Publication of EP0615064B1 publication Critical patent/EP0615064B1/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
    • 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

  • the present invention relates to a control arrangement for an injection valve for internal combustion engines according to claim 1, which compared to known control arrangements of this type, as described in particular in FR-A-2,543,647, but also in DE-A-26 47 744 or US-A- 3,680,782 are described, have lower leakage losses and are also of a considerably simpler construction.
  • the high-pressure delivery device pumps the fuel via the high-pressure fuel connection 10 into a fuel supply bore 16, which is located in a valve housing 18 of the injection valve. Part of the fuel is returned to the high-pressure delivery device practically without pressure via the fuel return connection 12, as will be explained in more detail below.
  • the fuel is conducted via the fuel supply bore 16 to a space 20 on the one hand and to the control part on the other hand, which is shown enlarged in FIG.
  • the space 20 is formed in a nozzle body 22 which is screwed onto the valve housing 18 by means of a holding part 24 designed as a union nut.
  • a holding part 24 designed as a union nut.
  • the nozzle body 22 there is a bore 25 connecting the space 20 with the fuel supply bore 16.
  • a nozzle needle 26 is slidably guided in the nozzle body 22 and bears with its lower end against a nozzle needle seat 28 and closes off injection bores 30 which are formed in a nozzle tip 32 forming part of the nozzle body 22.
  • the nozzle needle 26 In this closed position shown in the figures, the nozzle needle 26 is held on its nozzle needle seat 28 on the one hand by a nozzle needle spring 34 and on the other hand by the fuel pressure acting on its rear end in a manner still to be described.
  • the nozzle needle 26 has a shoulder 36.
  • the control part shown enlarged in FIGS. 2 and 3 has a 3/2-way valve 37 which is switched by means of an electromagnet 38.
  • the 3/2-way valve 37 has a closing element 40 which is guided by means of a guide shaft 42 and an insert 44 which is fixed to the housing and is built into the valve housing 18 and between which a sliding surface 45 is formed.
  • the insert part 44 and a further insert part 46 are installed in the valve housing 18 and fixed by a lock nut 48 in such a way that no or no significant leakage can take place between the high-pressure part and the low-pressure part of the injection valve. This is e.g. B. with a press fit or a tight sliding fit between the valve housing 18 and the insert parts 44 and 46.
  • the two insert parts 44, 46 are held at a distance from one another by means of a spacer ring 50 which is pressed or pushed into the valve housing 18.
  • the closure member 40 forms a first valve 52 with the insert part 44 and a second valve 54 with the other insert part 46 (FIG. 3).
  • the closure member 40 has a first closing surface 56 and a second closing surface 58, which interact with a valve seat 60 or 62 in the insert part 44 or 46. Both closing surfaces 56, 58 are designed as lateral surfaces of circular cones.
  • valve seats 60, 62 In order to form valve seats 60, 62 in the form of annular edges, surfaces 64, 66 are formed in the insert parts 44, 46, which are also circular conical surfaces.
  • the opening angles of the circular cones, which define the closing surface 56 and the assigned surface 64 or the closing surface 58 and the assigned surface 66, are of different sizes.
  • Corresponding difference angles are 68 and 70 in FIG. 3 labeled and exaggerated. In reality, these difference angles are a few degrees, namely usually a maximum of 3 degrees.
  • a valve chamber 72 is located between the insert parts 44, 46. This is connected via the first valve 52 to a branch 73, which is closed at the top by a plug 74, with the fuel supply bore 16.
  • This connection is formed by a transverse bore 76 formed in the valve housing 18, which opens into an outwardly open annular groove 78 in the hollow cylindrical insert part 44.
  • This annular groove 78 is connected to an interior 81 of the insert part 44 via inlet bores 80.
  • the annular groove 78 could also be formed in the valve housing 18.
  • the valve chamber 72 is connected to a control chamber 84 via a connection bore 82 in the insert part 46, which is closed on the one hand by the insert part 46 and on the other hand by a control piston 86 which is slidably guided in the valve housing 18.
  • a connecting rod 87 is arranged between the control piston 86 and the nozzle needle 26. The fuel pressure in the control chamber 84 thus acts via the control piston 86 and the connecting rod 87 on the rear end of the nozzle needle 26.
  • a blind hole 88 which is connected via a transverse bore 90 to a relief bore 92 formed in the valve housing 18.
  • a further transverse bore 94 (FIG. 1) opens into this relief bore 92, which is connected to a relief chamber 96, which is formed by the valve needle 26, the connecting rod 87 and the valve housing 18.
  • the relief bore 92 opens into a drain chamber 98 which is between the upper end of the valve housing 18 and a holding nut 100 for the electromagnet 38 screwed onto this end is formed.
  • This drain chamber 98 is connected to the fuel return connection 12 via a drain hole 102 in the holding nut 100.
  • the guide shaft 42 which is integral with the closure member 40, is firmly connected to an armature 104 of the electromagnet 38, the excitation coil 106 of which receives control pulses from the electronic control via the electrical connections 14.
  • a transmission pin 108 is passed through the electromagnet 38 and is pressed against the armature 104 by means of a compression spring 110. The force that the compression spring 110 exerts on the transmission pin 108 can be adjusted by means of an adjusting screw 112 (FIG. 1).
  • the armature 104 of the electromagnet 38 is fixedly connected to the transmission pin 108 instead of the guide shaft 42.
  • the transmission pin 108 is pressed against the guide shaft 42 by the compression spring 110 when the electromagnet 38 is in the currentless state. If the electromagnet 38 is energized and the armature 104 is consequently attracted, it must be ensured that the guide shaft 42, which is integral with the closure member 40, also shifts in the direction of the armature movement. This can be achieved, for example, in a manner known per se by a suitable design of the valve seat 60 in such a way that no complete hydraulic compensation takes place and thus the hydraulic pressure force presses the guide shaft 42 and moves it upward.
  • Another possibility is to use a compression spring which on the side of the valve 54 on the closure member 40 and thus also acts on the guide shaft 42 in the direction of the armature movement.
  • the operation of the injection valve described above is as follows: With the electromagnet 38 de-energized, the valve 52 of the directional control valve 37, which serves as an inlet valve, as shown in the figures, is kept open essentially under the action of the compression spring 110, while the valve 54, which forms an outlet valve, is closed. There is a fuel pressure in the valve chamber 72 and also in the control chamber 84, which can exceed 1000 bar. This fuel pressure acts via the control piston 86 and the connecting rod 87 on the nozzle needle 26, which is pressed against the nozzle needle seat 28 and closes off the injection bores 30.
  • the electromagnet 38 is switched off.
  • the directional control valve 37 is thereby reversed, i.e. exhaust valve 54 is closed and intake valve 52 is opened.
  • the pressure can now build up again in the valve chamber 72 and in the control chamber 84, with the result that the nozzle needle 26 is pressed again against the nozzle needle seat 28, which ends the injection.
  • the inlet valve 52 remains closed during the injection process, during which the valve chamber 72 of the directional valve 37 is connected to the relief bore 92 via the open outlet valve 54, the valve chamber 52 is closed off from the fuel supply bore 16 during this time.
  • the high-pressure part of the injection valve is separated from the low-pressure part during the injection process. A certain amount of fuel therefore flows from the high-pressure part directly to the low-pressure part only during the brief switchover of the directional valve 37.
  • the leakage of the directional valve 37 from the high-pressure part to the low-pressure part between the injection processes is kept small because only the guide shaft 42 for the closure member 40 is slidably guided in the insert part 44 by means of the sliding surface 45, which together with the insert part 46 in the manner described in the valve housing 18 is inserted. Because there is only one sliding surface 45, the leakage can be kept small.
  • valves 52, 54 are properly closed during a long operating period, i.e. the wear and tear that occurs cannot affect the functioning disadvantageously even with a very large number of switching operations.
  • FIG. 4 shows another embodiment corresponding to FIG. 3, which differs from the embodiment according to FIGS. 1-3 only by a different design of the closure member 40, which is designated by 140 in FIG. 4 . 3 and 4, the same reference numerals are used for corresponding parts.
  • the two closure surfaces designated 156, 158 are curved in the closure element 140 and are preferably designed as spherical jacket surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP19940102943 1993-03-08 1994-02-26 Système de commande d'une soupape d'injection d'un moteur à combustion interne Expired - Lifetime EP0615064B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH696/93 1993-03-08
CH00696/93A CH686845A5 (de) 1993-03-08 1993-03-08 Steueranordnung fuer ein Einspritzventil fuer Verbrennungskraftmaschinen.

Publications (2)

Publication Number Publication Date
EP0615064A1 true EP0615064A1 (fr) 1994-09-14
EP0615064B1 EP0615064B1 (fr) 1998-08-26

Family

ID=4193040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940102943 Expired - Lifetime EP0615064B1 (fr) 1993-03-08 1994-02-26 Système de commande d'une soupape d'injection d'un moteur à combustion interne

Country Status (3)

Country Link
EP (1) EP0615064B1 (fr)
CH (1) CH686845A5 (fr)
DE (1) DE59406752D1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2286427A (en) * 1994-02-09 1995-08-16 Daimler Benz Ag Solenoid valve controlled high pressure i.c.engine fuel injector
DE4434892A1 (de) * 1994-09-29 1996-04-11 Siemens Ag Einspritzventil
FR2750172A1 (fr) * 1996-08-23 1997-12-26 Daimler Benz Ag Injecteur electromagnetique pour moteurs a combustion interne
WO1998040623A1 (fr) * 1997-03-10 1998-09-17 Robert Bosch Gmbh Soupape pour reguler des fluides
WO1999002849A1 (fr) * 1997-07-11 1999-01-21 Robert Bosch Gmbh Injecteur de carburant
EP0908617A1 (fr) * 1997-10-10 1999-04-14 Robert Bosch Gmbh Dispositif d'injection de combustible
WO1999061779A1 (fr) * 1998-05-28 1999-12-02 Siemens Aktiengesellschaft Soupape d'injection de carburant pour moteurs a combustion interne
EP0995900A1 (fr) * 1998-10-23 2000-04-26 Lucas Industries Limited Soupape
DE19907544A1 (de) * 1999-02-22 2000-08-31 Siemens Ag Injektor für eine Einspritzanlage einer Brennkraftmaschine
WO2001088365A1 (fr) * 2000-05-18 2001-11-22 Robert Bosch Gmbh Systeme d'injection pour systeme accumulateur-injecteur de carburant de moteur a combustion interne
US6412706B1 (en) 1998-03-20 2002-07-02 Lucas Industries Fuel injector
FR2869651A1 (fr) * 2004-04-30 2005-11-04 Denso Corp Injecteur possedant une structure pour la commande d'une aiguille d'injection
CN112943499A (zh) * 2021-02-25 2021-06-11 田莉莉 一种喷油嘴的新型喷孔机构
WO2024246158A1 (fr) * 2023-05-30 2024-12-05 Ganser-Hydromag Ag Injecteur de carburant

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927737A (en) * 1952-04-12 1960-03-08 Bosch Gmbh Robert Fuel injection valves
DE1290010B (de) * 1963-09-09 1969-02-27 Ass Eng Ltd Brennstoffeinspritzventil fuer Brennkraftmaschinen
US3680782A (en) * 1969-10-24 1972-08-01 Sopromi Soc Proc Modern Inject Electromagnetic injectors
FR2145081A5 (fr) * 1971-07-08 1973-02-16 Peugeot & Renault
EP0304746A1 (fr) * 1987-08-25 1989-03-01 WEBER S.r.l. Soupape à injection de combustible commandée électromagnétiquement, pour moteurs à combustion interne
WO1989010510A2 (fr) * 1988-04-27 1989-11-02 Gerhard Mesenich Valve hydraulique a impulsions modulees
EP0459429A1 (fr) * 1990-05-29 1991-12-04 Toyota Jidosha Kabushiki Kaisha Injecteur de carburant

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927737A (en) * 1952-04-12 1960-03-08 Bosch Gmbh Robert Fuel injection valves
DE1290010B (de) * 1963-09-09 1969-02-27 Ass Eng Ltd Brennstoffeinspritzventil fuer Brennkraftmaschinen
US3680782A (en) * 1969-10-24 1972-08-01 Sopromi Soc Proc Modern Inject Electromagnetic injectors
FR2145081A5 (fr) * 1971-07-08 1973-02-16 Peugeot & Renault
EP0304746A1 (fr) * 1987-08-25 1989-03-01 WEBER S.r.l. Soupape à injection de combustible commandée électromagnétiquement, pour moteurs à combustion interne
WO1989010510A2 (fr) * 1988-04-27 1989-11-02 Gerhard Mesenich Valve hydraulique a impulsions modulees
EP0459429A1 (fr) * 1990-05-29 1991-12-04 Toyota Jidosha Kabushiki Kaisha Injecteur de carburant

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2286427A (en) * 1994-02-09 1995-08-16 Daimler Benz Ag Solenoid valve controlled high pressure i.c.engine fuel injector
GB2286427B (en) * 1994-02-09 1997-05-28 Daimler Benz Ag Solenoid-valve-controlled injector for an internal combustion engine
DE4434892A1 (de) * 1994-09-29 1996-04-11 Siemens Ag Einspritzventil
GB2316447B (en) * 1996-08-23 1998-10-07 Daimler Benz Ag Injection valve for internal combustion engines
GB2316447A (en) * 1996-08-23 1998-02-25 Daimler Benz Ag I.c. engine common rail fuel injection valve
FR2750172A1 (fr) * 1996-08-23 1997-12-26 Daimler Benz Ag Injecteur electromagnetique pour moteurs a combustion interne
WO1998040623A1 (fr) * 1997-03-10 1998-09-17 Robert Bosch Gmbh Soupape pour reguler des fluides
RU2193683C2 (ru) * 1997-03-10 2002-11-27 Роберт Бош Гмбх Гидрораспределительный клапан
WO1999002849A1 (fr) * 1997-07-11 1999-01-21 Robert Bosch Gmbh Injecteur de carburant
US6196193B1 (en) * 1997-07-11 2001-03-06 Robert Bosch Gmbh Fuel injection device
EP0908617A1 (fr) * 1997-10-10 1999-04-14 Robert Bosch Gmbh Dispositif d'injection de combustible
US6412706B1 (en) 1998-03-20 2002-07-02 Lucas Industries Fuel injector
US6250563B1 (en) 1998-05-28 2001-06-26 Siemens Aktiengesellschaft Fuel injection valve for internal combustion engines
WO1999061779A1 (fr) * 1998-05-28 1999-12-02 Siemens Aktiengesellschaft Soupape d'injection de carburant pour moteurs a combustion interne
EP0995900A1 (fr) * 1998-10-23 2000-04-26 Lucas Industries Limited Soupape
US6168087B1 (en) 1998-10-23 2001-01-02 Lucas Industries Limited Valve, for use with a fuel injector
DE19907544A1 (de) * 1999-02-22 2000-08-31 Siemens Ag Injektor für eine Einspritzanlage einer Brennkraftmaschine
DE19907544C2 (de) * 1999-02-22 2002-12-05 Siemens Ag Injektor für eine Einspritzanlage einer Brennkraftmaschine
WO2001088365A1 (fr) * 2000-05-18 2001-11-22 Robert Bosch Gmbh Systeme d'injection pour systeme accumulateur-injecteur de carburant de moteur a combustion interne
FR2869651A1 (fr) * 2004-04-30 2005-11-04 Denso Corp Injecteur possedant une structure pour la commande d'une aiguille d'injection
US7284712B2 (en) 2004-04-30 2007-10-23 Denso Corporation Injector having structure for controlling nozzle needle
CN112943499A (zh) * 2021-02-25 2021-06-11 田莉莉 一种喷油嘴的新型喷孔机构
WO2024246158A1 (fr) * 2023-05-30 2024-12-05 Ganser-Hydromag Ag Injecteur de carburant

Also Published As

Publication number Publication date
CH686845A5 (de) 1996-07-15
EP0615064B1 (fr) 1998-08-26
DE59406752D1 (de) 1998-10-01

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