EP1067284A1 - Soupape d'injection de combustible - Google Patents

Soupape d'injection de combustible Download PDF

Info

Publication number
EP1067284A1
EP1067284A1 EP00113979A EP00113979A EP1067284A1 EP 1067284 A1 EP1067284 A1 EP 1067284A1 EP 00113979 A EP00113979 A EP 00113979A EP 00113979 A EP00113979 A EP 00113979A EP 1067284 A1 EP1067284 A1 EP 1067284A1
Authority
EP
European Patent Office
Prior art keywords
fuel
fuel injection
valve
injection valve
valve member
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Withdrawn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
EP00113979A
Other languages
German (de)
English (en)
Inventor
Stephan Jonas
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 EP1067284A1 publication Critical patent/EP1067284A1/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Withdrawn legal-status Critical Current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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • 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
    • F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-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
    • 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
    • F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
    • F02M61/205—Means specially adapted for varying the spring tension or assisting the spring force to close the injection-valve, e.g. with damping of valve lift
    • 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
    • F02M2200/28—Details of throttles in fuel-injection apparatus
    • 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
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the invention relates to a fuel injection valve for Internal combustion engines, in particular diesel engines, for Fuel injection, especially diesel fuel, the by a fuel supply in the Fuel injector comes with one in one Guide bore of a valve body against the force a closing spring axially displaceable valve member, the at least one spray hole in the opening stroke Valve body releases through which the fuel in the Combustion chamber is injected.
  • the object of the invention is a fuel injection valve provide similar benefits as the two-spring holder delivers, but still simple and inexpensive can be manufactured.
  • the task is for a fuel injector Internal combustion engines, in particular diesel engines, for Fuel injection, especially diesel fuel, the by a fuel supply in the Fuel injector comes with one in one Guide bore of a valve body against the force a closing spring axially displaceable valve member, the at least one spray hole in the opening stroke Valve body releases through which the fuel in the Combustion chamber is injected, solved by a Counteracting opening stroke of the valve member Damping volume via a throttle with the fuel supply communicates. This makes it an inexpensive hydraulic damping of the valve member with only one Closing spring reached.
  • the solution according to the invention is especially for small injection quantities, such as the Pre-injection, suitable.
  • the valve member opens as soon as the fuel pressure fed from a high pressure pump the effective valve member area the closing spring force depressed.
  • the fuel can be extracted from the damping volume only escape through the damping throttle.
  • a pressure in the damping volume can be reached which is above the injection pressure and so the Opening movement of the valve member dampens.
  • this solution does not require leakage oil back pressure, which is difficult to implement.
  • Another special embodiment of the invention is characterized in that the stage in the Guide bore of the valve body a stroke stop for that Valve member forms.
  • the combination of the damping unit with the stroke stop is special in terms of production technology advantageous.
  • valve member on its combustion chamber end a first tapered section has a second, third and fourth follow cylindrical section, the fourth Section has a smaller diameter than the third section.
  • the damping volume can thus over the Dimensions or diameter of the individual sections of the Valve member are dimensioned.
  • Another special embodiment of the invention is characterized in that the throttle from a Throttle bore is formed with a throttle body that connects the damping volume with the fuel supply.
  • the damping of the valve member stroke basically causes a lower injection quantity in the ignition delay and thus one less combustion noise than one undamped valve member.
  • the throttling can of course, only through a hole without a special one introduced throttle can be achieved.
  • a nozzle needle 1 is in one Guide bore 20 axially in a nozzle body 2 slidably added.
  • By an arrow 19 is indicated how fuel into a fuel inlet 3 arrives, which is formed in the nozzle body 2.
  • the Fuel inlet 3 in the nozzle body 2 opens into one Pressure chamber 4. From the pressure comb 4, the fuel can get to the tip 5 of the nozzle needle 1.
  • the nozzle needle tip 5 is in contact with one Nozzle needle seat 6, which at the combustion chamber end of Nozzle body 2 is formed.
  • position of the nozzle needle 1 are also two provided in the combustion chamber end of the nozzle body 2 Spray holes 7 and 8 through the contact of 5 and 6 locked.
  • the prestressing force is indicated by an arrow 10 a (not shown) closing spring indicated that ensures that the tip 5 of the nozzle needle 1 against the Nozzle needle seat 6 is pressed.
  • the nozzle needle 1 further comprises a second section 12, a third section 13, and a fourth section 14.
  • the diameter d 2 of the second section 12 is equal to the diameter d 4 of the fourth section 14.
  • the diameter d 3 of the third section 13 is somewhat larger than the diameters d 2 and d 4 .
  • a step is formed between the diameter d 3 and the diameter d 4 , which limits a damping volume 16.
  • the damping volume 16 is limited by the inner peripheral surface of the guide bore 20 in the nozzle body 2 and the end face 18 of an intermediate piece 11.
  • the damping volume 16 is connected to the fuel inlet 3 through a bore 15.
  • a throttle point 17 is formed in the bore 15.
  • the throttle bore 15 is arranged in the nozzle body 2.
  • the throttle bore 15 can also be arranged in the intermediate piece 11.
  • the stroke of the nozzle needle 1 is 0.25 mm.
  • the diameters d 2 and d 4 are 4 mm.
  • the diameters d 2 and d 4 can also have different sizes.
  • the diameter d 3 is 6 mm.
  • the inner diameter of the throttle 17 is 0.25 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP00113979A 1999-07-03 2000-07-01 Soupape d'injection de combustible Withdrawn EP1067284A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19930832 1999-07-03
DE1999130832 DE19930832A1 (de) 1999-07-03 1999-07-03 Kraftstoffeinspritzventil

Publications (1)

Publication Number Publication Date
EP1067284A1 true EP1067284A1 (fr) 2001-01-10

Family

ID=7913626

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00113979A Withdrawn EP1067284A1 (fr) 1999-07-03 2000-07-01 Soupape d'injection de combustible

Country Status (3)

Country Link
EP (1) EP1067284A1 (fr)
JP (1) JP2001027166A (fr)
DE (1) DE19930832A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002097258A1 (fr) * 2001-05-30 2002-12-05 Robert Bosch Gmbh Injecteur de carburant a aiguille d'injection amortie
EP1359319A2 (fr) * 2002-04-20 2003-11-05 Delphi Technologies, Inc. Injecteur de carburant
EP2949916A1 (fr) * 2014-05-30 2015-12-02 AVL Powertrain Engineering, Inc. Injecteur de carburant

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5287428B2 (ja) * 2009-03-30 2013-09-11 株式会社デンソー インジェクタ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374614A (en) * 1943-05-20 1945-04-24 American Locomotive Co Liquid fuel injection apparatus
US4804143A (en) * 1984-04-05 1989-02-14 Lucas Industries Public Limited Company Fuel injection nozzle unit
DE3912834A1 (de) * 1988-04-19 1990-04-12 Usui Kokusai Sangyo Kk Kraftstoffeinspritzventil
US5533481A (en) * 1994-06-21 1996-07-09 Robert Bosch Gmbh Fuel Injection system
DE19618698A1 (de) * 1996-05-09 1997-11-13 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JPH10274132A (ja) * 1997-03-28 1998-10-13 Isuzu Motors Ltd 燃料噴射ノズル

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3041018C2 (de) * 1980-10-31 1986-03-20 Daimler-Benz Ag, 7000 Stuttgart Kraftstoffeinspritzeinrichtung für eine luftverdichtende Einspritzbrennkraftmaschine
US5685490A (en) * 1995-07-27 1997-11-11 Caterpillar Inc. Fuel injector with pressure bleed-off stop
GB9525369D0 (en) * 1995-12-12 1996-02-14 Lucas Ind Plc Injector
DE19752496A1 (de) * 1997-11-27 1999-06-02 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2374614A (en) * 1943-05-20 1945-04-24 American Locomotive Co Liquid fuel injection apparatus
US4804143A (en) * 1984-04-05 1989-02-14 Lucas Industries Public Limited Company Fuel injection nozzle unit
DE3912834A1 (de) * 1988-04-19 1990-04-12 Usui Kokusai Sangyo Kk Kraftstoffeinspritzventil
US5533481A (en) * 1994-06-21 1996-07-09 Robert Bosch Gmbh Fuel Injection system
DE19618698A1 (de) * 1996-05-09 1997-11-13 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
JPH10274132A (ja) * 1997-03-28 1998-10-13 Isuzu Motors Ltd 燃料噴射ノズル

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 01 29 January 1999 (1999-01-29) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002097258A1 (fr) * 2001-05-30 2002-12-05 Robert Bosch Gmbh Injecteur de carburant a aiguille d'injection amortie
EP1359319A2 (fr) * 2002-04-20 2003-11-05 Delphi Technologies, Inc. Injecteur de carburant
EP1359319A3 (fr) * 2002-04-20 2004-11-10 Delphi Technologies, Inc. Injecteur de carburant
EP2949916A1 (fr) * 2014-05-30 2015-12-02 AVL Powertrain Engineering, Inc. Injecteur de carburant
US9856841B2 (en) 2014-05-30 2018-01-02 Avl Powertrain Engineering, Inc. Fuel injector

Also Published As

Publication number Publication date
JP2001027166A (ja) 2001-01-30
DE19930832A1 (de) 2001-01-11

Similar Documents

Publication Publication Date Title
EP2480783B1 (fr) Soupape d'injection de carburant pour un moteur à combustion interne
DE2711350A1 (de) Kraftstoffeinspritzduese fuer brennkraftmaschinen
DE19820513A1 (de) Kraftstoffeinspritzdüse für eine Brennkraftmaschine
DE4341545A1 (de) Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE4440182C2 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10122256A1 (de) Kraftstoff-Einspritzvorrichtung für Brennkraftmaschinen, insbesondere Common-Rail-Injektor, sowie Kraftstoffsystem und Brennkraftmaschine
EP0612374B1 (fr) Gicleur d'alimentation en carburant avec injection d'additif pour moteurs diesel
EP0030258B1 (fr) Injecteur de combustible pour moteurs à combustion interne
WO2002048536A1 (fr) Soupape d'injection de carburant destinee a des moteurs a combustion interne
EP1719904A1 (fr) Injecteur de carburant
EP1433951A1 (fr) Injecteur de carburant de moteur à combustion interne
DE10322826A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen
EP1067284A1 (fr) Soupape d'injection de combustible
DE102007005382A1 (de) Leckagefreier Injektor
EP0135872A2 (fr) Injecteur de combustible pour moteurs à combustion interne
EP1621759A1 (fr) Injecteur pour rampe commune
DE19933328A1 (de) Common-Rail-Injektor
EP0293371B1 (fr) Buse d'injection de carburant d'un moteur a combustion
DE2726300A1 (de) Kraftstoffeinspritzduese
DE3725618C2 (de) Kraftstoff-Einspritzdüse für Brennkraftmaschinen
DE10117861A1 (de) Injektordüse mit Drosselverhalten
EP1815129B1 (fr) Injecteur de carburant
DE2711392A1 (de) Kraftstoffeinspritzduese
DE834471C (de) Mit einem Rueckschlagventil versehene offene Mehrlochduese fuer Einspritzbrennkraftmaschinen
DE19929881A1 (de) Kraftstoffeinspritzventil für Brennkraftmaschinen

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 CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

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: 20010711