EP2369165A3 - Fuel injector - Google Patents

Fuel injector Download PDF

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Publication number
EP2369165A3
EP2369165A3 EP11154810.3A EP11154810A EP2369165A3 EP 2369165 A3 EP2369165 A3 EP 2369165A3 EP 11154810 A EP11154810 A EP 11154810A EP 2369165 A3 EP2369165 A3 EP 2369165A3
Authority
EP
European Patent Office
Prior art keywords
nozzle needle
fuel injector
actuator
hydraulic
hydraulic active
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Withdrawn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
EP11154810.3A
Other languages
German (de)
French (fr)
Other versions
EP2369165A2 (en
Inventor
Martin Kessler
Matthias Burger
Keir Foster
Oliver Rain
Marco Beier
Herbert Schmidt
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 EP2369165A2 publication Critical patent/EP2369165A2/en
Publication of EP2369165A3 publication Critical patent/EP2369165A3/en
Withdrawn legal-status Critical Current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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0614—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature
    • F02M51/0617—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of electromagnets or fixed armature having two or more electromagnets
    • 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
    • F02M63/0059—Arrangements of valve actuators
    • F02M63/0063—Two or more actuators acting on a single valve body
    • 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
    • F02M63/0059—Arrangements of valve actuators
    • F02M63/0066—Combination of electromagnetic and 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Die Erfindung betrifft einen Kraftstoffinjektor zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine mit einer ersten Aktoreinheit (1) und wenigstens einer weiteren Aktoreinheit (2) zur Betätigung einer hubbeweglichen Düsennadel (3), durch deren Hubbewegung wenigstens eine Einspritzöffnung (4) des Kraftstoffinjektors freigebbar oder verschließbar ist, wobei die Aktoreinheiten (1, 2) unabhängig voneinander ansteuerbar und über eine Kopplungseinrichtung (5) an die Düsennadel (3) koppelbar sind.The invention relates to a fuel injector for injecting fuel into the combustion chamber of an internal combustion engine with a first actuator unit (1) and at least one further actuator unit (2) for actuating a liftable nozzle needle (3), by the stroke movement at least one injection port (4) of the fuel injector releasable or can be closed, wherein the actuator units (1, 2) can be controlled independently of one another and coupled to the nozzle needle (3) via a coupling device (5).

Erfindungsgemäß umfasst die Kopplungseinrichtung (5) ein hydraulisches Kopplervolumen (6), das von einer an der Düsennadel (3) ausgebildeten hydraulischen Wirkfläche (AN) und wenigstens einer weiteren hydraulischen Wirkfläche (A1, A2) begrenzt wird, welche an einem mit einer Aktoreinheit (1, 2) zusammenwirkenden Übertragungselement (7, 8) ausgebildet ist, so dass über das Flächenverhältnis der hydraulischen Wirkflächen (A1/AN und/oder A2/AN) in einer ersten Phase des Öffnungshubes der Düsennadel (3) eine Kraftverstärkung und/oder in einer zweiten Phase des Öffnungshubes der Düsennadel (3) eine Wegverstärkung bewirkbar ist.According to the invention, the coupling device (5) comprises a hydraulic coupler volume (6) which is delimited by a hydraulic active surface (AN) formed on the nozzle needle (3) and at least one further hydraulic active surface (A 1 , A 2 ) Actuator (1, 2) cooperating transmission element (7, 8) is formed, so that over the area ratio of the hydraulic active surfaces (A 1 / A N and / or A 2 / A N ) in a first phase of the opening stroke of the nozzle needle (3) a force amplification and / or in a second phase of the opening stroke of the nozzle needle (3) a path gain can be effected.

Ferner betrifft die Erfindung ein Verfahren zur Ansteuerung einer Düsennadel.

Figure imgaf001
Furthermore, the invention relates to a method for controlling a nozzle needle.
Figure imgaf001
EP11154810.3A 2010-03-26 2011-02-17 Fuel injector Withdrawn EP2369165A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010003334A DE102010003334A1 (en) 2010-03-26 2010-03-26 fuel injector

Publications (2)

Publication Number Publication Date
EP2369165A2 EP2369165A2 (en) 2011-09-28
EP2369165A3 true EP2369165A3 (en) 2017-06-14

Family

ID=44201336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11154810.3A Withdrawn EP2369165A3 (en) 2010-03-26 2011-02-17 Fuel injector

Country Status (2)

Country Link
EP (1) EP2369165A3 (en)
DE (1) DE102010003334A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2863044B1 (en) * 2013-10-15 2016-06-29 Continental Automotive GmbH Injection valve

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030116657A1 (en) * 2001-12-26 2003-06-26 Toyota Jidosha Kabushiki Kaisha Solenoid-operated fuel injection valve
WO2006002953A1 (en) * 2004-07-02 2006-01-12 Compact Dynamics Gmbh Fuel injection valve
EP1887214A2 (en) * 2006-08-07 2008-02-13 Robert Bosch Gmbh Injector and corresponding operating method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030116657A1 (en) * 2001-12-26 2003-06-26 Toyota Jidosha Kabushiki Kaisha Solenoid-operated fuel injection valve
WO2006002953A1 (en) * 2004-07-02 2006-01-12 Compact Dynamics Gmbh Fuel injection valve
EP1887214A2 (en) * 2006-08-07 2008-02-13 Robert Bosch Gmbh Injector and corresponding operating method

Also Published As

Publication number Publication date
DE102010003334A1 (en) 2011-09-29
EP2369165A2 (en) 2011-09-28

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Owner name: ROBERT BOSCH GMBH