EP1504187B1 - Injektor zur kraftstoffeinspritzung - Google Patents

Injektor zur kraftstoffeinspritzung Download PDF

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Publication number
EP1504187B1
EP1504187B1 EP03735282A EP03735282A EP1504187B1 EP 1504187 B1 EP1504187 B1 EP 1504187B1 EP 03735282 A EP03735282 A EP 03735282A EP 03735282 A EP03735282 A EP 03735282A EP 1504187 B1 EP1504187 B1 EP 1504187B1
Authority
EP
European Patent Office
Prior art keywords
injector
throttle
module
port
control
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
EP03735282A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1504187A1 (de
Inventor
Martin Neumaier
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1504187A1 publication Critical patent/EP1504187A1/de
Application granted granted Critical
Publication of EP1504187B1 publication Critical patent/EP1504187B1/de
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
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • F02M63/0035—Poppet valves, i.e. having a mushroom-shaped valve member that moves perpendicularly to the plane of the valve seat
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/21—Fuel-injection apparatus with piezoelectric or magnetostrictive elements
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the present invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine having the features of the preamble of claim 1.
  • Fuel injection injectors (DE 19936667 A1) are known, for example, for common rail systems in different configurations.
  • a conventionally constructed injector comprises a nozzle needle, which communicates indirectly via a control piston or directly with a control chamber, which is pressurized. If the same pressure prevails at the nozzle and at the control chamber, a resulting force is generated by the geometrically predetermined ratio of the surfaces to which the pressure is applied. For example, if the area on the nozzle is smaller than the area on the control piston, a resultant force is created which forces the nozzle needle into its seat and thus closes the nozzle.
  • the control chamber is connected via a so-called inlet throttle with a high pressure region from a memory (rail), which is also guided to the nozzle at the same time.
  • a so-called outlet throttle Via a so-called outlet throttle, the control room is further connected to a shut-off valve. Since the outlet throttle has a larger flow cross-section than the inlet throttle, the pressure in the control chamber decreases by the opening of the shut-off valve. By this pressure reduction in the control chamber, the resulting force on the nozzle needle changes, so that the nozzle needle lifts from its seat and fuel can flow through the injection holes in a combustion chamber of the engine.
  • the control chamber and the inlet throttle and the outlet throttle were each introduced into an injector body. As a result, the injector body has a relatively complicated structure and is To make relatively complicated from a manufacturing point of view, since a variety of operations must be performed on the injector body.
  • the injector according to the invention is constructed such that an inlet throttle and an outlet throttle are provided in a throttle module designed as a separate component.
  • the arrangement of the two throttles in a separate component manufacturing advantages can be achieved because the chokes, which must be made with a very high accuracy, can be easily accessible introduced in the separate component. Subsequently, a mounting of the throttle module in the injector.
  • a reset element e.g. a coil spring arranged to return the control means of the injector.
  • a recess is formed in the separate throttle module, which provides at least a portion of the control chamber of the injector.
  • the injector according to the invention can be made even more compact in the axial direction.
  • the inlet throttle is preferably arranged in the radial direction to the injector axis. Particularly preferred is the Supply throttle while under pressure fuel supplied via an arranged between the injector body and the separate throttle module annular gap.
  • the annular gap is preferably sealed in the axial direction.
  • the sealing takes place by means of cutting edges, which undergo a plastic deformation during assembly or cause a plastic deformation of the other component, so that a secure seal is made possible.
  • the throttle module is arranged in a stepped bore of the injector body with at least two stages.
  • a sealing of the annular gap in the axial direction at the steps of the stepped bore can be formed either in the throttle module or at the stages in the injector body.
  • Another possibility of sealing the annular gap between the injector body and the throttle module is a seal in the radial direction of the injector.
  • the radial seal can be done for example by means of an elastic ring seal or a press fit.
  • the single figure shows a schematic sectional view of a portion of an injector with a throttle module according to the invention.
  • the injector 1 comprises an injector body 2, in which a throttle module 5 and a control module 13 are arranged. Furthermore, a nozzle needle 3 is arranged in the injector body 2 and guided in the axial direction X-X of the injector in the injector body 2.
  • the throttle module 5 is formed as a separate component. In the throttle module 5, an inlet throttle 6 and an outlet throttle 7 is formed. Furthermore, a section U-shaped recess 8 is formed at the end directed toward the nozzle needle 3 of the throttle module 5. This recess 8 provides a control chamber 4 between the throttle module 5 and the nozzle needle 3 ready.
  • the control module 13 comprises a valve 15, which can be actuated via a control unit, not shown, such as a magnetic element or a piezoelectric actuator.
  • the valve 15 closes or releases a valve seat 18 formed on the control module 13.
  • a return of the valve 15 by means of a helical spring formed as a return spring 14.
  • two returns 16 are provided in the control module 13, which provide a connection to a tank, not shown, of the vehicle.
  • the spring 14 is arranged in a recess formed in the throttle module 5, so that a very compact construction in the axial direction X-X of the injector 1 is possible.
  • the inlet throttle 6 is supplied with pressurized fuel via a fuel feed line 19 and an annular gap 17 formed between the injector body 2 and the throttle module 5.
  • the throttle module 5 Since the throttle module 5 is designed as a separate component, a seal must be formed between the throttle module 5 and the injector body 2. As shown in FIG. 1, the throttle module 5 is arranged in a stepped bore of the injector body, which consists of a first stage 11 and a second stage 12. In this embodiment, a sealing of the annular gap 17 in the axial direction X-X of the injector 1. This seal is provided by a first cutting edge 9 and a second cutting edge 10, which are formed on shoulders of the throttle module 5, corresponding to the steps 11, 12 of the stepped holes.
  • the throttle module 5 as a separate individual component, the bores for the inlet throttle 6 and the outlet throttle 7 can be executed quickly and easily with high accuracy.
  • the cutting edges 9, 10 provided on the throttle module 5 can be produced very inexpensively, for example by turning.
  • the function of the injector 1 is as follows. If an injection of fuel should take place, the valve 15 is actuated via an actuator (not shown) and moved in the direction of the nozzle needle 3, so that the valve 15 lifts from its valve seat 18. As a result, a connection between the control chamber 4 via the outlet throttle 7 and the open valve 15 to the return 16 is opened. As a result, the pressure in the control chamber 4 decreases, so that the nozzle needle 3 moves in the axial direction XX of the injector into the control chamber 4. As a result, the nozzle needle 3 lifts from its seat, so that at least one nozzle is released and an injection of fuel through the nozzle takes place in a combustion chamber of an internal combustion engine. In this case, the injection takes place as long as the valve 15 remains in its open state. The opening of the valve 15 takes place against the spring force of the spring 14th
  • valve 15 When the injection is to be ended, the valve 15 is actuated again via the actuator, so that it returns by returning the spring 14 back to its original position, in which the valve seat 18 is closed. As a result, the connection between the control chamber 4 and the return line 16 is interrupted again, so that the original pressure can build up in the control chamber 4, since pressurized fuel is supplied via the inlet throttle 6. As a result, the nozzle needle 3 moves back to its original position and closes the nozzle of the injector, so that the injection of fuel is completed.
  • the present invention relates to an injector for injecting fuel into a combustion chamber of an internal combustion engine.
  • the injector comprises an injector body 2, a nozzle needle 3 and a control device 13 in order to control a pressure in a control chamber 4 for actuating the nozzle needle 3.
  • the injector 1 comprises an inlet throttle 6 and an outlet throttle 7, which are in fluid communication with the control chamber 4.
  • the inlet throttle 6 and the outlet throttle 7 are arranged in a throttle module 5 formed as a separate component.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuel-Injection Apparatus (AREA)
EP03735282A 2002-05-10 2003-05-06 Injektor zur kraftstoffeinspritzung Expired - Lifetime EP1504187B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2002120931 DE10220931C1 (de) 2002-05-10 2002-05-10 Injektor zur Kraftstoffeinspritzung
DE10220931 2002-05-10
PCT/DE2003/001448 WO2003095825A1 (de) 2002-05-10 2003-05-06 Injektor zur kraftstoffeinspritzung

Publications (2)

Publication Number Publication Date
EP1504187A1 EP1504187A1 (de) 2005-02-09
EP1504187B1 true EP1504187B1 (de) 2007-02-28

Family

ID=29285278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03735282A Expired - Lifetime EP1504187B1 (de) 2002-05-10 2003-05-06 Injektor zur kraftstoffeinspritzung

Country Status (4)

Country Link
EP (1) EP1504187B1 (ja)
JP (1) JP2005529267A (ja)
DE (2) DE10220931C1 (ja)
WO (1) WO2003095825A1 (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2355146T3 (es) * 2004-02-25 2011-03-23 Ganser-Hydromag Ag Válvula de inyección de combustible para una máquina de combustión interna.
DE102008044741B4 (de) 2008-08-28 2010-10-14 Continental Automotive Gmbh Verfahren und Steuergerät zum Steuern eines Injektors
DE102009007213B4 (de) 2009-02-03 2017-06-14 Continental Automotive Gmbh Injektorbaugruppe für ein Einspritzventil
JP6686931B2 (ja) * 2017-02-22 2020-04-22 株式会社デンソー 燃料噴射装置
DE102018204492A1 (de) * 2018-03-23 2019-09-26 Robert Bosch Gmbh Kraftstoffinjektor

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59506715D1 (de) * 1994-06-06 1999-10-07 Ganser Hydromag Brennstoffeinspritzventil für Verbrennungskraftmaschinen
IT1293434B1 (it) * 1997-07-11 1999-03-01 Elasis Sistema Ricerca Fiat Dispositivo di tenuta tra due vani soggetti a pressioni diverse, ad esempio in un inietttore di combustibile per motori a comustione
DE19819666A1 (de) * 1998-05-02 1999-11-04 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
EP1101033B1 (de) * 1998-07-31 2002-10-02 Siemens Aktiengesellschaft Kraftstoffeinspritzventil für brennkraftmaschinen
DE19936667A1 (de) * 1999-08-04 2001-02-22 Bosch Gmbh Robert Common-Rail-Injektor
DE19936668A1 (de) * 1999-08-04 2001-02-22 Bosch Gmbh Robert Common-Rail-Injektor
DE19937677C2 (de) * 1999-08-10 2003-06-26 Siemens Ag Einspritzventil mit verbesserter Dichtflächenanordnung

Also Published As

Publication number Publication date
WO2003095825A1 (de) 2003-11-20
DE50306665D1 (de) 2007-04-12
DE10220931C1 (de) 2003-11-27
EP1504187A1 (de) 2005-02-09
JP2005529267A (ja) 2005-09-29

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