EP1887216B1 - Arrangement thermique de compensation dans une valve d'injection - Google Patents

Arrangement thermique de compensation dans une valve d'injection Download PDF

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Publication number
EP1887216B1
EP1887216B1 EP20060016135 EP06016135A EP1887216B1 EP 1887216 B1 EP1887216 B1 EP 1887216B1 EP 20060016135 EP20060016135 EP 20060016135 EP 06016135 A EP06016135 A EP 06016135A EP 1887216 B1 EP1887216 B1 EP 1887216B1
Authority
EP
European Patent Office
Prior art keywords
piston
thermal compensation
compensation arrangement
front surface
injection valve
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.)
Not-in-force
Application number
EP20060016135
Other languages
German (de)
English (en)
Other versions
EP1887216A1 (fr
Inventor
Emiliano Dr. Cipriani
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Priority to EP20060016135 priority Critical patent/EP1887216B1/fr
Priority to DE200660011604 priority patent/DE602006011604D1/de
Publication of EP1887216A1 publication Critical patent/EP1887216A1/fr
Application granted granted Critical
Publication of EP1887216B1 publication Critical patent/EP1887216B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/0603—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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
    • 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

Definitions

  • the thermal compensation arrangement comprises a gap being formed in the recess and extending in radial direction between the lateral surface of the piston and the casing, a first piston channel being arranged in the piston and extending from the first front surface to the second front surface of the piston, and a second piston channel extending from the lateral surface to the first piston channel thereby enabling a fluid flow through the second piston channel between the gap and a recess section extending in axial direction between the first front surface of the piston and the casing.
  • the thermal compensation unit 14 comprises a sealing element 50 arranged in a piston rest 51 being part of the casing 45 and supporting the piston 46 in an initial state of the thermal compensation unit 14 as described below.
  • the piston 46 of the thermal compensation arrangement 14 is forced to move in a second piston movement direction P2 ( Fig. 4 ) towards the sealing element 50.
  • P2 Fig. 4
  • the movement of the piston 46 creates a pressure wave in the fluid being in the first piston channel 61a which opens the flap 64. By this fluid flows through the first piston channel 61a into the recess section 66 between the first front surface 58 of the piston 46 and the casing 54.

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

Claims (4)

  1. Dispositif de compensation thermique (14) pour une soupape d'injection (10), la soupape d'injection (10) comprenant
    - un boîtier (12) définissant un axe longitudinal central (A), ce boîtier (12) comportant une cavité (24),
    - une aiguille de soupape (22) déplaçable axialement dans la cavité (24), et
    - une unité d'actionnement (16) couplée à l'aiguille de soupape (22) et permettant d'en assurer le mouvement axial par rapport au boîtier (12) après une activation de l'unité d'actionnement (16),
    le dispositif de compensation thermique (14) comprenant
    - un fourreau (45) qui peut être couplé au boîtier (12) et qui définit une cavité (54),
    - un piston (46) qui peut se déplacer axialement dans la cavité (54) et être couplé à l'unité d'actionnement (16), ce piston (46) présentant une surface latérale (60), une première face frontale (58) faisant face à la direction axiale et une seconde face frontale (59) faisant face à la direction axiale mais en sens opposé par rapport à la première face frontale (58),
    - une fente (65) formée dans la cavité (54) et s'étendant en direction radiale entre la surface latérale (60) du piston et le fourreau (45),
    - un premier passage de piston (61a) ménagé dans le piston (46) en s'étendant à partir de la première face frontale (58) vers la seconde face frontale (59) du piston (46),
    caractérisé en ce que la soupape d'injection (10) comprend
    - un second passage de piston (61b) s'étendant à partir de la surface latérale (60) vers le premier passage de piston (61a) pour permettre un écoulement de fluide à travers le second passage de piston (61b) entre la fente (65) et la partie de cavité (66) s'étendant axialement entre la première face frontale (58) du piston (46) et le fourreau (45).
  2. Dispositif de compensation thermique (14) selon la revendication 1, comprenant une rainure (62) agencée dans la surface latérale (60) du piston (46) et couplée hydrauliquement au second passage de piston (61b).
  3. Dispositif de compensation thermique (14) selon la revendication 2, dans lequel la rainure (62) s'étend autour de la surface latérale (60) du piston (46).
  4. Soupape d'injection (10) comprenant un dispositif de compensation thermique (14) selon l'une des revendications précédentes.
EP20060016135 2006-08-02 2006-08-02 Arrangement thermique de compensation dans une valve d'injection Not-in-force EP1887216B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20060016135 EP1887216B1 (fr) 2006-08-02 2006-08-02 Arrangement thermique de compensation dans une valve d'injection
DE200660011604 DE602006011604D1 (de) 2006-08-02 2006-08-02 Anordnung zum thermischen Ausgleich in einem Einspritzventil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20060016135 EP1887216B1 (fr) 2006-08-02 2006-08-02 Arrangement thermique de compensation dans une valve d'injection

Publications (2)

Publication Number Publication Date
EP1887216A1 EP1887216A1 (fr) 2008-02-13
EP1887216B1 true EP1887216B1 (fr) 2010-01-06

Family

ID=37502181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060016135 Not-in-force EP1887216B1 (fr) 2006-08-02 2006-08-02 Arrangement thermique de compensation dans une valve d'injection

Country Status (2)

Country Link
EP (1) EP1887216B1 (fr)
DE (1) DE602006011604D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2110199B1 (fr) 2008-04-18 2013-04-10 Continental Automotive GmbH Ensemble ajusté à interférence et procédé de production d'un ensemble ajusté à interférence
DE602008004641D1 (de) * 2008-07-03 2011-03-03 Continental Automotive Gmbh Thermische Kompensationsanordnung und Einspritzventil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6676030B2 (en) * 2000-10-11 2004-01-13 Siemens Automotive Corporation Compensator assembly having a flexible diaphragm for a fuel injector and method
DE60204565T2 (de) * 2002-08-20 2005-11-03 Siemens Vdo Automotive S.P.A., Fauglia Dosiergerät mit Thermalkompensationseinheit
DE10343017A1 (de) * 2003-09-17 2005-04-14 Robert Bosch Gmbh Brennstoffeinspritzventil
EP1591656B1 (fr) * 2004-04-26 2008-03-12 Isuzu Motors Limited Méchanisme d'absortion de l'expansion différentielle et une soupape d'injection de combustible comprenant celui-ci

Also Published As

Publication number Publication date
EP1887216A1 (fr) 2008-02-13
DE602006011604D1 (de) 2010-02-25

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