EP1719904A1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

Info

Publication number
EP1719904A1
EP1719904A1 EP06110845A EP06110845A EP1719904A1 EP 1719904 A1 EP1719904 A1 EP 1719904A1 EP 06110845 A EP06110845 A EP 06110845A EP 06110845 A EP06110845 A EP 06110845A EP 1719904 A1 EP1719904 A1 EP 1719904A1
Authority
EP
European Patent Office
Prior art keywords
control
fuel injection
chamber
injection nozzle
throttle
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Withdrawn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
EP06110845A
Other languages
German (de)
English (en)
Inventor
Michael Kurz
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 EP1719904A1 publication Critical patent/EP1719904A1/fr
Withdrawn legal-status Critical Current

Links

Images

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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/003—Valve inserts containing control chamber and valve piston

Definitions

  • the invention is based on a fuel injection nozzle according to the preamble of patent claim 1.
  • Such a fuel injection nozzle for internal combustion engines is for example from the DE 199 39 420 A1 known.
  • the fuel injection is controlled via the prevailing in a control chamber control pressure.
  • the control chamber is connected via an inlet throttle to a high pressure line and connected via a switching valve and an outlet throttle with a drain to relieve the control chamber and thereby a nozzle needle whatsoever.
  • the opening speed of the nozzle needle is essentially given by the throttle resistance ratio of the inlet and outlet throttles.
  • the fuel injection nozzle according to the invention for internal combustion engines with the characterizing features of claim 1 has the advantage that the opening speed of the nozzle needle is braked from a predetermined opening stroke. This allows very high opening speeds and thus good jet penetration behavior in the combustion chamber until the predetermined opening stroke. The muffled opening after reaching the opening stroke reduces the amount of ignition delay, eventually leading to improved exhaust emissions.
  • FIGURE shows the fuel injection nozzle according to the invention in a longitudinal section.
  • the fuel injection nozzle (injector) 1 for internal combustion engines shown in the figure has a cylindrical nozzle body 2 , which projects with its free lower end into a combustion chamber of the internal combustion engine, not shown in more detail.
  • a nozzle needle 4 is axially displaceably guided by a closing spring 5 in a conical valve seat. 6 at the combustion chamber end of the bore 3 is pressed.
  • the nozzle needle 4 is surrounded at the combustion chamber end by an annular gap 7 which extends to the valve seat 6 and is connected via a high-pressure fuel line 8 to a high-pressure fuel accumulator (common rail) 9 .
  • a sealing cone 10 of the nozzle needle 4 in conjunction with the valve seat 6 prevents fuel from entering the annular gap 7 through injection holes 11 into the combustion chamber of the internal combustion engine.
  • the combustion chamber facing away thickened end 12 of the nozzle needle 4 is axially displaceably guided in the longitudinal bore (guide bore) 13 of a control sleeve 14 which is disposed within a connected to the high-pressure line 8 chamber 15 of a module body 16 .
  • a first control chamber 18 is formed between a control piston 17 guided therein displaceably and the nozzle needle 4.
  • the control piston 17 in the guide bore 13 defines a second control chamber 19, which is sealed via a sealing edge 20 of the control sleeve 14 relative to the chamber 15, that is decoupled from the high pressure (rail pressure) prevailing therein.
  • the closing spring 5 is supported on the control sleeve 14, which is thereby pressed with its sealing edge 20 against the chamber wall 21 .
  • the guide bore 13 has in the first control chamber 18 on a radially inwardly directed annular projection 22 , the underside of which forms a stop for the nozzle needle 4 and the top thereof a stop for the control piston 17.
  • the engaging on the nozzle needle 4 closing spring 5 is disposed in the first control chamber 18 and supported on the annular projection 22.
  • the control piston 17 is biased by a biasing spring 23, which is arranged in the second control chamber 19 and supported on the chamber wall 21 in abutment against the annular projection 22.
  • the biasing spring 23 is much weaker than the closing spring 5 designed.
  • a bore in the sleeve wall of the control sleeve 14 forms an inlet throttle (Z-throttle) 24, via which the first control chamber 18 is connected to the chamber 15 and to the high-pressure line 8.
  • a provided in the control piston 17 bore forms a damper throttle 25, via which the two control chambers 18, 19 are interconnected.
  • a bore in the chamber wall 21 forms an outlet throttle (A throttle) 26, which via a 2/2-way switching valve 27 with a drain (Leakage oil) 28 is connected.
  • the damper throttle 25 has a higher throttle resistance than the inlet throttle 24 and as the outlet throttle 26.
  • the switching valve 27 is not energized, so that prevails in both control chambers 18, 19 rail pressure. If the switching valve 27 is energized, first the second control chamber 19 via the outlet throttle 26, the throttle resistance is significantly smaller than the throttle resistance of the damper throttle 25, relieved. The damper throttle 25 and the small guide play of the control piston 17 in the guide bore 13 prevent an immediate pressure drop in the first control chamber 18. The pressure in the second control chamber 19 drops below the rail pressure, so that the control piston 17 upwards to rest against the chamber wall 21st moves. As a result, the volume of the first control chamber 18 increases, and the pressure prevailing therein drops below the rail pressure.
  • the opening force which acts via the rail pressure on a pressure shoulder 29 of the nozzle needle 4, is sufficient to control the nozzle needle against the action of the closing spring 5 and the closing pressure prevailing in the first control chamber 18.
  • the nozzle needle 4 initially moves at a high needle speed by a certain opening stroke, which corresponds to the stroke of the control piston 17.
  • the nozzle needle 4 When the control piston 17 rests against the chamber wall 21 and the nozzle needle 4 compresses the volume in the first control chamber 18, the nozzle needle 4 is decelerated and moves, since only a small amount of control from the first control chamber 18 is discharged via the damper throttle 25, with low speed on , The nozzle needle 4 moves maximally to rest on the annular projection 22, the nozzle needle-side stop surface is formed so that no hydraulic side effects affect the closing process.

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)
  • Fuel-Injection Apparatus (AREA)
EP06110845A 2005-05-02 2006-03-08 Injecteur de carburant Withdrawn EP1719904A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005220359 2005-05-02

Publications (1)

Publication Number Publication Date
EP1719904A1 true EP1719904A1 (fr) 2006-11-08

Family

ID=36751906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06110845A Withdrawn EP1719904A1 (fr) 2005-05-02 2006-03-08 Injecteur de carburant

Country Status (1)

Country Link
EP (1) EP1719904A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1967727A3 (fr) * 2007-03-08 2009-07-01 Robert Bosch Gmbh Injecteur de carburant doté d'un équipement amélioré d'une soupape de commande pour la commande d'une aiguille d'injection
US8480009B2 (en) 2010-07-30 2013-07-09 Caterpillar Inc. Large bore fuel system and fuel injector for same
WO2013178338A1 (fr) * 2012-05-30 2013-12-05 L'orange Gmbh Injecteur
DE102013002969B3 (de) * 2013-02-22 2014-05-22 L'orange Gmbh Kraftstoffinjektor
CN110848060A (zh) * 2019-10-14 2020-02-28 中国北方发动机研究所(天津) 一种电控蓄压喷油器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19939420A1 (de) 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzverfahren und -system für eine Brennkraftmaschine
FR2823535A1 (fr) * 2001-04-12 2002-10-18 Toyota Motor Co Ltd Dispositif d'injection de carburant
US20020153429A1 (en) * 2000-01-28 2002-10-24 Friedrich Boecking Injection nozzle
FR2824109A1 (fr) * 2001-04-27 2002-10-31 Denso Corp Structure simple d'injecteur de carburant concue pour maintenir un pointeau en position de levee intermediaire
DE10315489B3 (de) * 2003-04-04 2004-08-26 Robert Bosch Gmbh Kraftstoffinjektor mit Druckübersetzer und in ein Düsenmodul integriertem Dämpfungskolben
US20050023372A1 (en) * 2003-07-31 2005-02-03 Weimken Norval J. Variable control orifice member and fuel injector using same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19939420A1 (de) 1999-08-20 2001-03-01 Bosch Gmbh Robert Kraftstoffeinspritzverfahren und -system für eine Brennkraftmaschine
US20020153429A1 (en) * 2000-01-28 2002-10-24 Friedrich Boecking Injection nozzle
FR2823535A1 (fr) * 2001-04-12 2002-10-18 Toyota Motor Co Ltd Dispositif d'injection de carburant
FR2824109A1 (fr) * 2001-04-27 2002-10-31 Denso Corp Structure simple d'injecteur de carburant concue pour maintenir un pointeau en position de levee intermediaire
DE10315489B3 (de) * 2003-04-04 2004-08-26 Robert Bosch Gmbh Kraftstoffinjektor mit Druckübersetzer und in ein Düsenmodul integriertem Dämpfungskolben
US20050023372A1 (en) * 2003-07-31 2005-02-03 Weimken Norval J. Variable control orifice member and fuel injector using same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1967727A3 (fr) * 2007-03-08 2009-07-01 Robert Bosch Gmbh Injecteur de carburant doté d'un équipement amélioré d'une soupape de commande pour la commande d'une aiguille d'injection
US8480009B2 (en) 2010-07-30 2013-07-09 Caterpillar Inc. Large bore fuel system and fuel injector for same
WO2013178338A1 (fr) * 2012-05-30 2013-12-05 L'orange Gmbh Injecteur
DE102013002969B3 (de) * 2013-02-22 2014-05-22 L'orange Gmbh Kraftstoffinjektor
US9765737B2 (en) 2013-02-22 2017-09-19 L'orange Gmbh Fuel injector
CN110848060A (zh) * 2019-10-14 2020-02-28 中国北方发动机研究所(天津) 一种电控蓄压喷油器
CN110848060B (zh) * 2019-10-14 2022-03-15 中国北方发动机研究所(天津) 一种电控蓄压喷油器

Similar Documents

Publication Publication Date Title
EP1387939B1 (fr) Soupape d'injection de carburant pour moteurs a combustion
EP1395744A1 (fr) Appareil d'injection de carburant pour moteurs a combustion, en particulier injecteur de type common rail, systeme d'alimentation en carburant et moteur a combustion
DE102004017305A1 (de) Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen mit direkt ansteuerbaren Düsennadeln
EP1853813B1 (fr) Injecteur
DE102004024527A1 (de) Kraftstoffeinspritzeinrichtung
DE102007043538A1 (de) Injektor mit hydraulischem Dämpfer
EP1354133B1 (fr) Dispositif d'injection de carburant
EP1719904A1 (fr) Injecteur de carburant
EP1541859B1 (fr) Injecteur
DE102007005382A1 (de) Leckagefreier Injektor
EP1608866A1 (fr) Soupape d'injection de carburant de moteurs a combustion interne
EP1483499A1 (fr) Systeme pour moduler en pression le comportement d'injection
DE10307002A1 (de) Kraftstoffeinspritzdüse und Pumpe-Düse-Einheit
EP1576283A1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne
DE10160490B4 (de) Kraftstoff-Einspritzvorrichtung, Kraftstoffsystem sowie Brennkraftmaschine
DE102005020359A1 (de) Kraftstoffeinspritzdüse
DE10164395A1 (de) Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE10141111A1 (de) Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
EP1067284A1 (fr) Soupape d'injection de combustible
EP1655479B1 (fr) Installation d'injection de carburant
EP1654454B1 (fr) Dispositif d'injection de carburant pour moteur a combustion interne
DE102005014180A1 (de) Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
DE10003252A1 (de) Einspritzdüse
DE10305508A1 (de) Kraftstoffeinspritzventil für eine Brennkraftmaschine sowie Verfahren zum Betreiben einer Brennkraftmaschine
DE102005005713A1 (de) Düsenbaugruppe und Einspritzventil

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

AKX Designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20070509

REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566