EP2354527A3 - Fuel injector - Google Patents

Fuel injector Download PDF

Info

Publication number
EP2354527A3
EP2354527A3 EP11150096.3A EP11150096A EP2354527A3 EP 2354527 A3 EP2354527 A3 EP 2354527A3 EP 11150096 A EP11150096 A EP 11150096A EP 2354527 A3 EP2354527 A3 EP 2354527A3
Authority
EP
European Patent Office
Prior art keywords
valve
plate
throttle
control
closing
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
EP11150096.3A
Other languages
German (de)
French (fr)
Other versions
EP2354527A2 (en
EP2354527B1 (en
Inventor
Holger Rapp
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 EP2354527A2 publication Critical patent/EP2354527A2/en
Publication of EP2354527A3 publication Critical patent/EP2354527A3/en
Application granted granted Critical
Publication of EP2354527B1 publication Critical patent/EP2354527B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-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
    • 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
    • F02M2200/28—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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/001—Control chambers formed by movable sleeves

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)

Abstract

Die Erfindung betrifft einen Kraftstoffinjektor für ein Kraftstoffeinspritzsystem mit einer in einem Düsenkörper (1) hubbeweglich geführten Düsennadel (2) zum Schließen und Freigeben wenigstens einer im Düsenkörper (1) ausgebildeten Einspritzöffnung und mit einem Steuerventil (3) zur indirekten Ansteuerung der Düsennadel (2), indem durch Öffnen oder Schließen des Steuerventils (3) ein die Düsennadel (2) in Schließrichtung beaufschlagender Steuerdruck in einem Steuerraum (4) verändert wird, wobei das Steuerventil (3) einen in einer Ventilplatte (5) ausgebildeten Ventilraum (6) umfasst, der von einer Drosselplatte (7) begrenzt wird, die zwischen dem Düsenkörper (1) und der Ventilplatte (5) angeordnet ist und in welcher wenigstens eine Bohrung (8, 12) zur Verbindung des Ventilraums (6) mit dem Steuerraum (4) und/oder einem Hochdruckkanal (9) ausgebildet ist.The invention relates to a fuel injector for a fuel injection system with a nozzle needle (2) for closing and releasing at least one injection opening formed in the nozzle body (1) and having a control valve (3) for indirectly actuating the nozzle needle (2). in that by opening or closing the control valve (3), a control pressure (4) acting on the nozzle needle (2) in the closing direction is changed, the control valve (3) comprising a valve space (6) formed in a valve plate (5), is limited by a throttle plate (7) which is arranged between the nozzle body (1) and the valve plate (5) and in which at least one bore (8, 12) for connecting the valve chamber (6) with the control chamber (4) and / or a high-pressure channel (9) is formed.

Erfindungsgemäß mündet die Bohrung (8, 12) über einen zwischen der Ventilplatte (5) und der Drosselplatte (7) ausgebildeten Axialspalt (10, 13) in den Ventilraum (6) und besitzt im Mündungsbereich einen reduzierten Durchmesser d zur Ausbildung einer Drossel (11, 14), deren Drosselwirkung über die Höhe h des Axialspalts (10, 13) beeinflussbar ist.

Figure imgaf001
According to the invention, the bore (8, 12) opens into the valve chamber (6) via an axial gap (10, 13) formed between the valve plate (5) and the throttle plate (7) and has a reduced diameter d in the mouth region for forming a throttle (11 , 14) whose throttle effect on the height h of the axial gap (10, 13) can be influenced.
Figure imgaf001
EP11150096.3A 2010-02-05 2011-01-04 Fuel injector Not-in-force EP2354527B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010001612A DE102010001612A1 (en) 2010-02-05 2010-02-05 fuel injector

Publications (3)

Publication Number Publication Date
EP2354527A2 EP2354527A2 (en) 2011-08-10
EP2354527A3 true EP2354527A3 (en) 2013-07-31
EP2354527B1 EP2354527B1 (en) 2014-11-12

Family

ID=43903171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11150096.3A Not-in-force EP2354527B1 (en) 2010-02-05 2011-01-04 Fuel injector

Country Status (2)

Country Link
EP (1) EP2354527B1 (en)
DE (1) DE102010001612A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014215749A1 (en) * 2014-08-08 2016-02-11 Continental Automotive Gmbh Throttle device for controlling an amount of fuel to be supplied to a fuel injector and injector
DE102016217508A1 (en) 2016-09-14 2018-03-15 Robert Bosch Gmbh fuel injector
CN108131230B (en) * 2017-12-26 2024-03-08 南岳电控（衡阳）工业技术股份有限公司 High-pressure common rail heavy mechanical oil sprayer of diesel engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976924A2 (en) * 1998-07-31 2000-02-02 Siemens Aktiengesellschaft Servo valve for an injector and injector
EP1245822A2 (en) * 2001-03-27 2002-10-02 Delphi Technologies, Inc. Fuel injector with a restricted flow means in the control valve arrangement
US20050120872A1 (en) * 2003-12-05 2005-06-09 Stockner Alan R. Three way valve and electro-hydraulic actuator using same
DE102008001330A1 (en) * 2008-04-23 2009-10-29 Robert Bosch Gmbh Fuel injection valve for internal combustion engines

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004061800A1 (en) 2004-12-22 2006-07-06 Robert Bosch Gmbh Injector of a fuel injection system of an internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976924A2 (en) * 1998-07-31 2000-02-02 Siemens Aktiengesellschaft Servo valve for an injector and injector
EP1245822A2 (en) * 2001-03-27 2002-10-02 Delphi Technologies, Inc. Fuel injector with a restricted flow means in the control valve arrangement
US20050120872A1 (en) * 2003-12-05 2005-06-09 Stockner Alan R. Three way valve and electro-hydraulic actuator using same
DE102008001330A1 (en) * 2008-04-23 2009-10-29 Robert Bosch Gmbh Fuel injection valve for internal combustion engines

Also Published As

Publication number Publication date
EP2354527A2 (en) 2011-08-10
DE102010001612A1 (en) 2011-08-11
EP2354527B1 (en) 2014-11-12

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