DE502005008888D1 - fuel Injector - Google Patents

fuel Injector

Info

Publication number
DE502005008888D1
DE502005008888D1 DE502005008888T DE502005008888T DE502005008888D1 DE 502005008888 D1 DE502005008888 D1 DE 502005008888D1 DE 502005008888 T DE502005008888 T DE 502005008888T DE 502005008888 T DE502005008888 T DE 502005008888T DE 502005008888 D1 DE502005008888 D1 DE 502005008888D1
Authority
DE
Germany
Prior art keywords
injection
injector needle
needle
piston
nozzle
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.)
Active
Application number
DE502005008888T
Other languages
German (de)
Inventor
Friedrich Boecking
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 DE502005008888D1 publication Critical patent/DE502005008888D1/en
Active 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
    • F02M45/02—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
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • 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
    • F02M2200/46—Valves, e.g. injectors, with concentric 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
    • F02M2200/70—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
    • F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion
    • F02M2200/706—Valves for filling or emptying hydraulic chamber
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators

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

A fuel injection nozzle (1) for internal combustion engines comprises a nozzle base (2) having at least two injection orifices (11, 15), an outer injector needle (4) and an inner injector needle (5). The outer injector needle (4) is configured as a hollow needle and can be axially displaced in a bore (3) of the nozzle base (2) and controls injection of pressurized fuel through at least one first injection orifice (11). The inner injector needle (5) is coaxially guided in the outer injector needle (4) and controls injection of pressurized fuel through at least one second injection orifice (15). The inventive fuel injection nozzle is characterized by at least one axially displaceable piston (16) having a projection (22) that entrains the outer injector needle (4) in the opening direction thereof. The two injector needles (4, 5) can be displaced in relation to the piston (16) in the opening direction against the effect of a closing spring (8, 12). An actuator (18) comprises an actuating element (17) that can be axially displaced in relation to the piston (16).
DE502005008888T 2004-12-16 2005-11-21 fuel Injector Active DE502005008888D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004060550A DE102004060550A1 (en) 2004-12-16 2004-12-16 fuel Injector
PCT/EP2005/056091 WO2006063918A1 (en) 2004-12-16 2005-11-21 Fuel injection nozzle

Publications (1)

Publication Number Publication Date
DE502005008888D1 true DE502005008888D1 (en) 2010-03-04

Family

ID=35953945

Family Applications (2)

Application Number Title Priority Date Filing Date
DE102004060550A Withdrawn DE102004060550A1 (en) 2004-12-16 2004-12-16 fuel Injector
DE502005008888T Active DE502005008888D1 (en) 2004-12-16 2005-11-21 fuel Injector

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE102004060550A Withdrawn DE102004060550A1 (en) 2004-12-16 2004-12-16 fuel Injector

Country Status (5)

Country Link
EP (1) EP1838960B1 (en)
JP (1) JP4518516B2 (en)
AT (1) ATE455241T1 (en)
DE (2) DE102004060550A1 (en)
WO (1) WO2006063918A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3846917B2 (en) * 1995-07-13 2006-11-15 株式会社デンソー Fuel injection device
JP3327787B2 (en) * 1996-09-25 2002-09-24 三菱重工業株式会社 Two-fluid injection valve
JP3932688B2 (en) * 1997-08-28 2007-06-20 株式会社デンソー Fuel injection device for internal combustion engine
DE10058153A1 (en) 2000-11-22 2002-06-06 Bosch Gmbh Robert Injection nozzle with separately controllable nozzle needles
DE10246974A1 (en) * 2002-10-09 2004-04-22 Robert Bosch Gmbh Fuel injector nozzle for use in internal combustion engine has needle and sleeve separately cutting off fuel flow to inner and outer nozzle bores
DE10254186A1 (en) * 2002-11-20 2004-06-17 Siemens Ag Injector with a directly driven register nozzle needle for fuel injection into an internal combustion engine
DE10336327B4 (en) * 2003-08-07 2016-03-17 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
ATE455241T1 (en) 2010-01-15
EP1838960A1 (en) 2007-10-03
EP1838960B1 (en) 2010-01-13
WO2006063918A1 (en) 2006-06-22
JP4518516B2 (en) 2010-08-04
JP2008523319A (en) 2008-07-03
DE102004060550A1 (en) 2006-07-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition