EP1705365A3 - Fuel injector with a direct control of the injection needle and a variable stroke amplifier - Google Patents

Fuel injector with a direct control of the injection needle and a variable stroke amplifier Download PDF

Info

Publication number
EP1705365A3
EP1705365A3 EP06100702A EP06100702A EP1705365A3 EP 1705365 A3 EP1705365 A3 EP 1705365A3 EP 06100702 A EP06100702 A EP 06100702A EP 06100702 A EP06100702 A EP 06100702A EP 1705365 A3 EP1705365 A3 EP 1705365A3
Authority
EP
European Patent Office
Prior art keywords
fuel injector
injection needle
direct control
prestroke
variable stroke
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
EP06100702A
Other languages
German (de)
French (fr)
Other versions
EP1705365B1 (en
EP1705365A2 (en
Inventor
Rudolf Heinz
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 EP1705365A2 publication Critical patent/EP1705365A2/en
Publication of EP1705365A3 publication Critical patent/EP1705365A3/en
Application granted granted Critical
Publication of EP1705365B1 publication Critical patent/EP1705365B1/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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/12—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship providing a continuous cyclic delivery with variable 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
    • 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
    • F02M45/083—Having two or more closing springs acting on injection-valve
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs
    • 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

Abstract

The injector has a prestroke sleeve (13) that travels a prestroke distance during the opening movement of an injection valve unit (9) until it reaches a changeover point of the pressure boosting. A prestressing spring (21) is provided in the form of a tube spring and is contained between a collar (22) and a lower end of the sleeve. The spring operates to continuously build up the force required to switch the pressure boosting from one opening pressure to another opening pressure during the passage through the prestroke distance.
EP06100702A 2005-03-21 2006-01-23 Fuel injector with a direct control of the injection needle and a variable stroke amplifier Not-in-force EP1705365B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005012929A DE102005012929A1 (en) 2005-03-21 2005-03-21 Fuel injector with direct control of the injection valve member and variable ratio

Publications (3)

Publication Number Publication Date
EP1705365A2 EP1705365A2 (en) 2006-09-27
EP1705365A3 true EP1705365A3 (en) 2009-02-18
EP1705365B1 EP1705365B1 (en) 2010-11-03

Family

ID=36588928

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06100702A Not-in-force EP1705365B1 (en) 2005-03-21 2006-01-23 Fuel injector with a direct control of the injection needle and a variable stroke amplifier

Country Status (4)

Country Link
US (1) US20060208107A1 (en)
EP (1) EP1705365B1 (en)
AT (1) ATE487052T1 (en)
DE (2) DE102005012929A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10326259A1 (en) * 2003-06-11 2005-01-05 Robert Bosch Gmbh Injector for fuel injection systems of internal combustion engines, in particular direct injection diesel engines
DE102004027824A1 (en) * 2004-06-08 2006-01-05 Robert Bosch Gmbh Fuel injector with variable actuator ratio
DE102006008648A1 (en) * 2006-02-24 2007-08-30 Robert Bosch Gmbh Fuel e.g. diesel or petrol, injecting device for internal combustion engine, has valve unit including control piston and nozzle needle that are coupled with each other by hydraulic coupler, and guiding unit guiding fluid outlet of piston
JP4459183B2 (en) * 2006-03-16 2010-04-28 株式会社デンソー Injector
AT511075B1 (en) * 2011-05-26 2012-09-15 Avl List Gmbh TWO MATERIAL internal combustion engine
CN104066965B (en) 2011-11-01 2017-05-10 康明斯公司 Fuel injector with injection control valve assembly
DE102013219225A1 (en) * 2013-09-25 2015-03-26 Continental Automotive Gmbh Piezo injector for direct fuel injection
US20170167457A1 (en) * 2014-02-07 2017-06-15 Ecomotors, Inc. Preloaded spring for use with a piezoelectric fuel injector
DE102016109073B4 (en) * 2015-06-05 2022-02-17 Denso Corporation Fuel injector and fuel injector controller
CN107664081A (en) * 2016-07-29 2018-02-06 博世有限公司 Disk spring for fuel injector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1174615A2 (en) * 2000-07-18 2002-01-23 Delphi Technologies, Inc. Fuel injector
DE10326259A1 (en) * 2003-06-11 2005-01-05 Robert Bosch Gmbh Injector for fuel injection systems of internal combustion engines, in particular direct injection diesel engines

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022166A (en) * 1975-04-03 1977-05-10 Teledyne Industries, Inc. Piezoelectric fuel injector valve
DE2931874C2 (en) * 1979-08-06 1983-08-04 Audi Nsu Auto Union Ag, 7107 Neckarsulm Electrically operated valve
US5482213A (en) * 1993-05-31 1996-01-09 Aisin Seiki Kabushiki Kaisha Fuel injection valve operated by expansion and contraction of piezoelectric element
GB9615663D0 (en) * 1996-07-25 1996-09-04 Lucas Ind Plc Fuel pumping apparatus
US5947380A (en) * 1997-11-03 1999-09-07 Caterpillar Inc. Fuel injector utilizing flat-seat poppet valves
DE19758066A1 (en) * 1997-12-29 1999-07-01 Steyr Daimler Puch Ag Pump nozzle type with open injection nozzle
DE19843535A1 (en) * 1998-09-23 2000-03-30 Bosch Gmbh Robert Fuel injector
EP1041272B1 (en) * 1999-04-01 2004-10-27 Delphi Technologies, Inc. Fuel injector
DE10032517A1 (en) * 2000-07-05 2002-01-24 Bosch Gmbh Robert Injector for injecting fuel into combustion chambers of internal combustion engines comprises a control part loaded by spring elements in the injector housing and guided in a guide sleeve surrounding a control space
US6766965B2 (en) * 2001-08-31 2004-07-27 Siemens Automotive Corporation Twin tube hydraulic compensator for a fuel injector
DE102004028522A1 (en) 2004-06-11 2005-12-29 Robert Bosch Gmbh Fuel injector with variable Aktorhubübersetzung
DE102005004738A1 (en) * 2005-02-02 2006-08-10 Robert Bosch Gmbh Fuel injector with direct needle control for an internal combustion engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1174615A2 (en) * 2000-07-18 2002-01-23 Delphi Technologies, Inc. Fuel injector
DE10326259A1 (en) * 2003-06-11 2005-01-05 Robert Bosch Gmbh Injector for fuel injection systems of internal combustion engines, in particular direct injection diesel engines

Also Published As

Publication number Publication date
US20060208107A1 (en) 2006-09-21
EP1705365B1 (en) 2010-11-03
ATE487052T1 (en) 2010-11-15
EP1705365A2 (en) 2006-09-27
DE102005012929A1 (en) 2006-09-28
DE502006008205D1 (en) 2010-12-16

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