EP3399177A1 - Kraftstoffeinspritzer - Google Patents

Kraftstoffeinspritzer Download PDF

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Publication number
EP3399177A1
EP3399177A1 EP18173371.8A EP18173371A EP3399177A1 EP 3399177 A1 EP3399177 A1 EP 3399177A1 EP 18173371 A EP18173371 A EP 18173371A EP 3399177 A1 EP3399177 A1 EP 3399177A1
Authority
EP
European Patent Office
Prior art keywords
fuel
valve needle
valve
bore
restriction
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
EP18173371.8A
Other languages
English (en)
French (fr)
Other versions
EP3399177B1 (de
Inventor
Kevin Price
Kris SULLIVAN
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.)
Delphi Technologies IP Ltd
Original Assignee
Delphi International Operations Luxembourg SARL
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 Delphi International Operations Luxembourg SARL filed Critical Delphi International Operations Luxembourg SARL
Publication of EP3399177A1 publication Critical patent/EP3399177A1/de
Application granted granted Critical
Publication of EP3399177B1 publication Critical patent/EP3399177B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating 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
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • 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
    • F02M61/08—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 the valves opening in direction of fuel flow
    • 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
    • F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
    • 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
    • F02M2200/304—Fuel-injection apparatus having mechanical parts, the movement of which is damped using hydraulic means

Definitions

  • the present invention relates to a fuel injector for use in delivering high pressure fuel to an internal combustion engine.
  • the invention relates to a fuel injector for use in a compression ignition internal combustion engine.
  • An aspect of the invention provides a fuel injector for use in an internal combustion engine, the fuel injector comprising a nozzle body having a bore for receiving fuel from a supply line for pressurised fuel, an outlet from the bore for delivering fuel to the combustion cylinder, in use, a valve needle slidable within the bore between a closed position in which fuel flow through the outlet into the combustion chamber is prevented, and an open position in which fuel flow through the outlet into the combustion chamber is enabled, wherein the valve needle carries a restrictive element providing at least one restriction for restricting the flow of fuel through the bore such that, during opening movement of the valve needle, fuel pressure downstream of the restrictive element is less than a pressure of fuel supplied to the bore from the supply line; and at least one valve device which is operable in response to a pressure difference across the restrictive element so as to allow a flow of fuel through the at least one restriction during opening movement of the valve needle but to further restrict the flow of fuel through the at least one restriction during a final phase of closing movement of the valve needle, thereby to damp said final phase of closing
  • the combined cross-sectional area of the aperture(s) may be significantly less than 50% of the combined cross sectional area of the restriction(s) and/or significantly less than 25% of the combined cross-sectional area of the outlet(s). Other values are also possible. It will be appreciated that the relative dimensions of the bore, the restrictive element, the restriction(s), the aperture(s) and the outlet(s) may be varied in order to select the desired damping performance.
  • the restrictive element 20 is provided with a plurality of passages or orifices 21 extending through its thickness to allow the restricted flow of fuel through the restrictive element 20 and through the bore 2.
  • the orifices 21 act as a plurality of restrictions because the combined cross-sectional area of the orifices is significantly smaller than the cross-sectional area of the bore 2.
  • the orifices 21 are spaced around the restrictive element 20 in a circle.
  • the number and spatial arrangement of the orifices 21 is not critical, and that in other embodiments there may only be one orifice.
  • Movement of the valve needle 1 is controlled by varying the fuel pressure in a control chamber 13 located at a proximal end of the valve needle.
  • fuel pressure within the control chamber 13 is controlled by means of an actuation system (not shown) including a three-way valve which is controlled by, for example, a solenoid actuator or a piezoelectric actuator.
  • the three-way valve is operable to supply high pressure fuel from the supply line without any connection to a low pressure drain in order to generate a high pressure within the control chamber 13, and to connect the control chamber 13 to the low pressure drain without any connection to the supply line in order to reduce the pressure within the control chamber.

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)
EP18173371.8A 2016-03-16 2017-03-16 Kraftstoffeinspritzer Active EP3399177B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1604455.4A GB2548375A (en) 2016-03-16 2016-03-16 Fuel injector
EP17161355.7A EP3219974A1 (de) 2016-03-16 2017-03-16 Kraftstoffeinspritzer

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP17161355.7A Division EP3219974A1 (de) 2016-03-16 2017-03-16 Kraftstoffeinspritzer

Publications (2)

Publication Number Publication Date
EP3399177A1 true EP3399177A1 (de) 2018-11-07
EP3399177B1 EP3399177B1 (de) 2020-01-08

Family

ID=55952386

Family Applications (2)

Application Number Title Priority Date Filing Date
EP17161355.7A Withdrawn EP3219974A1 (de) 2016-03-16 2017-03-16 Kraftstoffeinspritzer
EP18173371.8A Active EP3399177B1 (de) 2016-03-16 2017-03-16 Kraftstoffeinspritzer

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP17161355.7A Withdrawn EP3219974A1 (de) 2016-03-16 2017-03-16 Kraftstoffeinspritzer

Country Status (2)

Country Link
EP (2) EP3219974A1 (de)
GB (1) GB2548375A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK181318B1 (en) * 2022-02-18 2023-08-10 Man Energy Solutions Filial Af Man Energy Solutions Se Tyskland A fuel valve for a large turbocharged two-stroke uniflow crosshead internal combustion engine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6318646B1 (en) * 1999-03-26 2001-11-20 MAGNETI MARELLI S.p.A. Fuel injector
US6499467B1 (en) * 2000-03-31 2002-12-31 Cummins Inc. Closed nozzle fuel injector with improved controllabilty
EP1369579A1 (de) * 2002-06-07 2003-12-10 Magneti Marelli Powertrain S.p.A. Brennstoffeinspritzdüse für eine Brennkraftmachine mit Mehrlochzerstäuber
EP1990532A1 (de) * 2007-05-07 2008-11-12 Robert Bosch GmbH Kraftstoffinjektor für eine Brennkraftmaschine mit Common-Rail-Einspritzsystem
WO2013034543A1 (en) * 2011-09-08 2013-03-14 Delphi Technologies Holding S.À.R.L. Injection nozzle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19960339A1 (de) * 1999-12-15 2001-06-21 Bosch Gmbh Robert Brennstoffeinspritzventil
US7690588B2 (en) * 2007-07-31 2010-04-06 Caterpillar Inc. Fuel injector nozzle with flow restricting device
GB201322485D0 (en) * 2013-12-19 2014-02-05 Delphi Tech Holding Sarl Fuel injection nozzle
US9822748B2 (en) * 2014-05-31 2017-11-21 Cummins Inc. Restrictive flow passage in common rail injectors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6318646B1 (en) * 1999-03-26 2001-11-20 MAGNETI MARELLI S.p.A. Fuel injector
US6499467B1 (en) * 2000-03-31 2002-12-31 Cummins Inc. Closed nozzle fuel injector with improved controllabilty
EP1369579A1 (de) * 2002-06-07 2003-12-10 Magneti Marelli Powertrain S.p.A. Brennstoffeinspritzdüse für eine Brennkraftmachine mit Mehrlochzerstäuber
EP1990532A1 (de) * 2007-05-07 2008-11-12 Robert Bosch GmbH Kraftstoffinjektor für eine Brennkraftmaschine mit Common-Rail-Einspritzsystem
WO2013034543A1 (en) * 2011-09-08 2013-03-14 Delphi Technologies Holding S.À.R.L. Injection nozzle

Also Published As

Publication number Publication date
GB2548375A (en) 2017-09-20
EP3219974A1 (de) 2017-09-20
EP3399177B1 (de) 2020-01-08
GB201604455D0 (en) 2016-04-27

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