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EP1916412A3 - Actuator with fluid isolation - Google Patents

Actuator with fluid isolation Download PDF

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Publication number
EP1916412A3
EP1916412A3 EP07115156A EP07115156A EP1916412A3 EP 1916412 A3 EP1916412 A3 EP 1916412A3 EP 07115156 A EP07115156 A EP 07115156A EP 07115156 A EP07115156 A EP 07115156A EP 1916412 A3 EP1916412 A3 EP 1916412A3
Authority
EP
European Patent Office
Prior art keywords
actuator
needle
piezoelectric actuators
fluid isolation
fuel
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
EP07115156A
Other languages
German (de)
French (fr)
Other versions
EP1916412A2 (en
EP1916412B1 (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 EP1916412A2 publication Critical patent/EP1916412A2/en
Publication of EP1916412A3 publication Critical patent/EP1916412A3/en
Application granted granted Critical
Publication of EP1916412B1 publication Critical patent/EP1916412B1/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
    • 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
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M2200/707—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for avoiding fuel contact with actuators, e.g. isolating actuators by using bellows or diaphragms

Landscapes

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

Abstract

The injector (10) has piezoelectric actuators (44, 46, 48) arranged in an actuator chamber with fuel pressure, where the piezoelectric actuators control a needle module (12). A needle-shaped injection valve unit in the nozzle module releases or closes an injection opening (86). The actuator chamber is filled with an insulating fluid i.e. diesel, and is separated from a fuel-guided high pressure chamber by an elastic membrane unit.
EP07115156A 2006-10-25 2007-08-29 Actuator with fluid isolation Not-in-force EP1916412B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006050165A DE102006050165A1 (en) 2006-10-25 2006-10-25 Actuator with fluid insulation

Publications (3)

Publication Number Publication Date
EP1916412A2 EP1916412A2 (en) 2008-04-30
EP1916412A3 true EP1916412A3 (en) 2009-11-04
EP1916412B1 EP1916412B1 (en) 2012-02-15

Family

ID=38980963

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07115156A Not-in-force EP1916412B1 (en) 2006-10-25 2007-08-29 Actuator with fluid isolation

Country Status (3)

Country Link
EP (1) EP1916412B1 (en)
AT (1) ATE545778T1 (en)
DE (1) DE102006050165A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007053426A1 (en) * 2007-11-09 2009-05-14 Robert Bosch Gmbh Piezoelectric actuator module
DE102011084512A1 (en) 2011-10-14 2013-04-18 Robert Bosch Gmbh Hydraulic coupler

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217594A1 (en) * 2002-04-19 2003-11-06 Bosch Gmbh Robert Fuel injection valve for IC engines has throttle gap formed by Laser/erosion drilling, and positioned separate from guide gaps, for cheaper fabrication of gaps
EP1445480A1 (en) * 2003-02-04 2004-08-11 Siemens VDO Automotive S.p.A. Metering device with dynamic sealing
DE102004012283A1 (en) * 2003-03-13 2004-11-11 Denso Corp., Kariya Piezoelectric actuator for fuel injector, has piezoelectric elements with respect to which load of specific value is applied in axial direction, based on elastic force of expansion-contraction portion of element storage case
US20050206274A1 (en) * 2004-02-17 2005-09-22 Denso Corporation Piezoelectric stack and production method of piezoelectric stack

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217594A1 (en) * 2002-04-19 2003-11-06 Bosch Gmbh Robert Fuel injection valve for IC engines has throttle gap formed by Laser/erosion drilling, and positioned separate from guide gaps, for cheaper fabrication of gaps
EP1445480A1 (en) * 2003-02-04 2004-08-11 Siemens VDO Automotive S.p.A. Metering device with dynamic sealing
DE102004012283A1 (en) * 2003-03-13 2004-11-11 Denso Corp., Kariya Piezoelectric actuator for fuel injector, has piezoelectric elements with respect to which load of specific value is applied in axial direction, based on elastic force of expansion-contraction portion of element storage case
US20050206274A1 (en) * 2004-02-17 2005-09-22 Denso Corporation Piezoelectric stack and production method of piezoelectric stack

Also Published As

Publication number Publication date
ATE545778T1 (en) 2012-03-15
DE102006050165A1 (en) 2008-04-30
EP1916412A2 (en) 2008-04-30
EP1916412B1 (en) 2012-02-15

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