EP1939441A2 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

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Publication number
EP1939441A2
EP1939441A2 EP07119031A EP07119031A EP1939441A2 EP 1939441 A2 EP1939441 A2 EP 1939441A2 EP 07119031 A EP07119031 A EP 07119031A EP 07119031 A EP07119031 A EP 07119031A EP 1939441 A2 EP1939441 A2 EP 1939441A2
Authority
EP
European Patent Office
Prior art keywords
control sleeve
valve
fuel injector
control
injector according
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.)
Withdrawn
Application number
EP07119031A
Other languages
German (de)
English (en)
Other versions
EP1939441A3 (fr
Inventor
Friedrich Boecking
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 EP1939441A2 publication Critical patent/EP1939441A2/fr
Publication of EP1939441A3 publication Critical patent/EP1939441A3/fr
Withdrawn legal-status Critical Current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
    • 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
    • F02M63/0014—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
    • 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
    • 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
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • F02M63/0042—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing combined with valve seats of the lift valve type
    • 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
    • F02M63/0043—Two-way valves
    • 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
    • F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
    • F02M63/0078—Valve member details, e.g. special shape, hollow or fuel passages in the valve member
    • F02M63/008—Hollow valve members, e.g. members internally guided

Definitions

  • the invention relates to a fuel injector according to the preamble of patent claim 1.
  • the in Fig. 1 shown fuel injector 1 is commonly used in an internal combustion engine having a plurality of cylinders, wherein each of these cylinders associated with such an injector (fuel injection valve).
  • the injector has a known manner in a cylinder combustion chamber of the internal combustion engine projecting, not shown here injector and the injector depending on the pressure in a control chamber 2 opening and closing, here indicated only to a small extent nozzle needle 3 .
  • the control chamber 2 is connected via an inlet throttle (Z-throttle) 4 permanently to a high-pressure inlet line (high pressure side) 5 of the fuel.
  • a control valve 6 in the form of a 2/2-way valve is provided, which opens or blocks the connection of the control chamber 2 with a low-pressure chamber (low-pressure side) 7 .
  • the high-pressure supply line 5 is connected to a not shown high-pressure accumulator (common rail) and the low pressure chamber 7 is connected to a leakage oil drain 7a.
  • the nozzle needle 3 is guided to form the control chamber 2 in a valve piece 8 , in which the Z-throttle 4 is provided.
  • the control valve 6 has a guide piece 9 with a through-hole 9a and a control sleeve 10 displaceably guided therein between two valve positions.
  • the valve and guide pieces 8, 9 and above a valve plate 11 are braced in a bore of an injector 12 by means of a valve clamping screw 13 .
  • an outgoing from the control chamber 2 communicating passage 14 which opens via an annular pressure chamber 15 in the through hole 9a of the guide piece 9 and an outlet throttle (A choke) 16 which extends.
  • the annular pressure chamber 15 is bounded above by the valve plate 11 and radially inwardly by the control sleeve 10.
  • the control sleeve 10 has at its upper end a conical sealing surface which cooperates with a flat valve seat 17 on the valve plate. 11
  • the control sleeve 10 is connected to an armature 18 above the valve plate 11 via a rod 19 which engages through an opening 20 of the valve plate 11. Via the opening 20, the interior of the control sleeve 10 is connected to the low pressure chamber 7, in which the armature 18 is arranged.
  • the control sleeve 10 is supported by a housing-side supported closing spring 21 in their in Fig. 1 shown biased closed valve position and by means of a magnetic coil 22 whose magnetic field acts on the armature 18, slidable in its open valve position.
  • the magnetic coil 22 with its magnetic core 23 is disposed between the valve plate 11 and armature 18.
  • the diameter d of the flat valve seat 17 is equal to the guide diameter D of the guide piece 9, whereby the control sleeve 10 in its in Fig. 1 shown closed valve position with respect to the pressure prevailing in the pressure chamber 15 high pressure balanced. In this closed valve position, the connection of the control chamber 2 to the low pressure side 7 is blocked by the control sleeve 10 and therefore the nozzle needle 3 is closed by the pressure prevailing in the control chamber 2 high pressure. If the solenoid 22 is energized, the control sleeve 10 is pulled from the valve plate 11, ie the valve seat 17, in the direction of the nozzle needle 3, ie down, in its open valve position, whereby the pressure in the control chamber 2 is reduced and the nozzle needle 3 opens.
  • the pressure surge occurring during opening of the control sleeve 10 (Abêt technically) is discharged via the opening 20 in the low-pressure chamber 7.
  • the path of the reduced fuel quantity from the valve seat 17 to the drain 7a is marked with flow arrow 24 . Since the control sleeve 10 is force balanced, only small forces are needed to open the control sleeve 10.
  • the control sleeve 10 makes only a very small opening stroke of about 18-25 microns.
  • the A-restrictor 16 limits the flow. If the energization of the solenoid 22 is released, the control sleeve 10 is moved back into its closed valve position via the closing spring 21 and the control chamber 2 is filled again via the Z-throttle 4.
  • the force-balanced control sleeve 10 allows a highly dynamic control valve. 6
  • the hydraulic booster 30 comprises two pistons 33, 34, which are coupled in a motion-coupled manner by a fuel-filled booster chamber 32 with each other.
  • the piezoactuator 31 acts on the upper piston 33, and the lower piston 34 is formed integrally with the Steuerhülse10. In the closed valve position shown, the piezoelectric actuator 31 is not energized and thus shortened, whereby the upper piston 33 is displaced upwards and thus the lower piston 34 and the control sleeve 10 are displaced upwards into the closed valve position.
  • the piezoelectric actuator 31 If the piezoelectric actuator 31 is energized, it extends against the action of a tubular spring 35, whereby the upper piston 33 is pushed down and thus the inner piston 34 and the Steuerhülse10 are moved down into the open valve position. If the piezoelectric actuator 31 is no longer energized, the control sleeve 10 is moved back to its closed valve position via the closing spring 21 supported on the lower piston 34 and the control chamber 2 is refilled via the Z-throttle 4. Since hardly force is demanded from the piezoelectric actuator 31, it can be made very small in diameter.
  • Fig. 1 is different in the Fig. 3 shown fuel injector 1 in that here the force-balanced control sleeve 10 is guided on the upper end of a valve pin 40 of the valve member 8 and the pressure chamber 15 is formed within the control sleeve 10 between the valve plate 11 and a piston 41 of the rod 19.
  • the piston 41 is guided displaceably in the control sleeve 10 and is coupled in the opening direction of the control sleeve 10, ie downwardly, via an annular shoulder 42 of the control sleeve 10.
  • the connecting channel 14 is formed by a longitudinal bore in the valve pin 40 and opens between the valve pin 40 and piston 41 in a sleeve space 43, which in turn is connected via a channel 44 in the piston 41 to the pressure chamber 15.
  • the diameter d of the valve seat 17 is equal to the sleeve diameter D, whereby the control sleeve 10 is force-balanced.
  • the piezoelectric actuator 31 In the closed valve position shown, the piezoelectric actuator 31 is not energized and thus shortened, whereby the control sleeve 10 is displaced by the closing spring 21 upwards in the closed valve position. If the piezoelectric actuator 31 energized, it extends and pushes the control sleeve 10 by means of the rod 19 against the action of the closing spring 21 down into the open valve position.
  • Fig. 4 is different in the Fig. 5 shown fuel injector 1 in that here the armature 18 is provided directly (ie without rod) at the upper end of the sleeve control sleeve 10 and the magnetic drive (solenoid 22 with magnetic core 23) between the valve member 8 and valve plate 11 is arranged. If the solenoid 22 is energized, the control sleeve 10 is pulled from the valve plate 11, ie the valve seat 17, in the direction of the nozzle needle 3, ie down, in its open valve position, whereby the pressure in the control chamber 2 is reduced and the nozzle needle 3 opens. Since the control sleeve 10 is force balanced, only small forces are needed to open the control sleeve 10.
EP07119031A 2006-12-21 2007-10-23 Injecteur de carburant Withdrawn EP1939441A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610060593 DE102006060593A1 (de) 2006-12-21 2006-12-21 Kraftstoffinjektor

Publications (2)

Publication Number Publication Date
EP1939441A2 true EP1939441A2 (fr) 2008-07-02
EP1939441A3 EP1939441A3 (fr) 2009-02-04

Family

ID=39299828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07119031A Withdrawn EP1939441A3 (fr) 2006-12-21 2007-10-23 Injecteur de carburant

Country Status (2)

Country Link
EP (1) EP1939441A3 (fr)
DE (1) DE102006060593A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009037095A1 (fr) * 2007-09-17 2009-03-26 Robert Bosch Gmbh Soupape de commande pour injecteur de carburant
EP2813698A1 (fr) * 2013-06-10 2014-12-17 Robert Bosch Gmbh Soupape d'injection de combustible
CN114790957A (zh) * 2022-04-29 2022-07-26 中国北方发动机研究所(天津) 一种滑阀式共轨喷油器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009000300A1 (de) * 2009-01-19 2010-07-22 Robert Bosch Gmbh Kraftstoff-Injektor
CN113944580B (zh) * 2021-11-10 2022-07-19 一汽解放汽车有限公司 一种喷射器及发动机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612405A1 (fr) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Système d'injection de carburant pour moteur à combustion interne
EP1612403A1 (fr) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Soupape servo pour controller l'injecteur d'un moteur à combustion interne
EP1927748A2 (fr) * 2006-12-01 2008-06-04 Robert Bosch Gmbh Injecteur de carburant

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1612405A1 (fr) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Système d'injection de carburant pour moteur à combustion interne
EP1612403A1 (fr) * 2004-06-30 2006-01-04 C.R.F. Societa' Consortile per Azioni Soupape servo pour controller l'injecteur d'un moteur à combustion interne
EP1927748A2 (fr) * 2006-12-01 2008-06-04 Robert Bosch Gmbh Injecteur de carburant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009037095A1 (fr) * 2007-09-17 2009-03-26 Robert Bosch Gmbh Soupape de commande pour injecteur de carburant
EP2813698A1 (fr) * 2013-06-10 2014-12-17 Robert Bosch Gmbh Soupape d'injection de combustible
CN114790957A (zh) * 2022-04-29 2022-07-26 中国北方发动机研究所(天津) 一种滑阀式共轨喷油器
CN114790957B (zh) * 2022-04-29 2023-11-21 中国北方发动机研究所(天津) 一种滑阀式共轨喷油器

Also Published As

Publication number Publication date
DE102006060593A1 (de) 2008-06-26
EP1939441A3 (fr) 2009-02-04

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