EP1546542A1 - Soupape d'injection pour l'injection de carburant dans un moteur a combustion interne - Google Patents

Soupape d'injection pour l'injection de carburant dans un moteur a combustion interne

Info

Publication number
EP1546542A1
EP1546542A1 EP04787097A EP04787097A EP1546542A1 EP 1546542 A1 EP1546542 A1 EP 1546542A1 EP 04787097 A EP04787097 A EP 04787097A EP 04787097 A EP04787097 A EP 04787097A EP 1546542 A1 EP1546542 A1 EP 1546542A1
Authority
EP
European Patent Office
Prior art keywords
injection valve
actuator
injection
valve according
hydraulic
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
EP04787097A
Other languages
German (de)
English (en)
Other versions
EP1546542B1 (fr
Inventor
Willibald SCHÜRZ
Martin Simmet
Joachim Wagner
Hanspeter Zink
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1546542A1 publication Critical patent/EP1546542A1/fr
Application granted granted Critical
Publication of EP1546542B1 publication Critical patent/EP1546542B1/fr
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
    • 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
    • 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

Definitions

  • Injection valve for injecting fuel into an internal combustion engine
  • the invention relates to an injection valve for injecting fuel into an internal combustion engine according to the preamble of claim 1.
  • Accumulator injection systems are increasingly used for the fuel supply of internal combustion engines, in which very high injection pressures are used.
  • Such injection systems are known as common rail systems (for diesel engines) and HPDI injection systems (for gasoline engines).
  • the fuel is common to all cylinders of the engine using a high-pressure pump
  • Pressure accumulator promoted from which the injectors on the individual cylinders are supplied with fuel.
  • the opening and closing of the injection valves is usually controlled electromagnetically.
  • the injection valves in such systems are equipped with switchable actuators, in particular piezoelectric actuators, which control the opening and closing of the nozzle needle of the injection valve, that is to say in particular the timing of the start and the end of the injection process.
  • a hydraulic transmitter of an injector is known, for example, from O98 / 15018.
  • the object of the invention is to provide an injection valve, the actuator of which has only a small mass to be moved with few contact surfaces.
  • Figure 1 is a schematic perspective view of the actuator of an injection valve according to the invention.
  • Figure 2 is a partially sectioned enlarged view of detail II of FIG. 2003P08940
  • Figure 1 shows an actuator 1 of an injection valve, which essentially consists of a piezoelectric element 2, a so-called piezo stack, a spring element 3 designed as a tubular spring, at least partially coaxially surrounding the piezoelectric element 2, and a head plate 4 and a base plate 5.
  • the actuator 1 is used to move a nozzle needle 7, which is axially movably mounted in a bore of a nozzle body of the injection valve and is biased in the closing direction via a spring element 6, between a position that releases injection bores at the front end of the bore and a position that closes these injection bores.
  • the piezoelectric element 2 As soon as the piezoelectric element 2 is electrically excited, it expands. The energization of the piezoelectric element 2 thus causes the entire assembly of the actuator 1 to be lengthened, so that the actuator 1 presses downward via its base plate 5 onto the spring element 6 mounted on a collar 7a of the nozzle needle 7, which in turn causes the nozzle needle 7 to extend its closed position is pressed and an injection hole is released.
  • a hydraulic play compensation 8 cooperating with the actuator 1 is provided.
  • the actuator 1 shown is characterized in that the hydraulic play compensation 8 is designed as a component of the actuator 1, namely as a base plate 5.
  • This embodiment has the advantage that, on the one hand, the number of contact surfaces to be manufactured with a precise fit is reduced and, on the other hand, by dispensing with a solid base plate 5, as is known from the prior art, the moving mass of the components can be significantly reduced, which has an advantageous effect on the dynamic behavior of the overall system.
  • the actuator 1 additionally has an intermediate plate 9 arranged between the piezoelectric element 2 and the hydraulic lash adjuster 8 forming the base plate 5, which serves to compensate for misalignment and a precisely fitting contact between the piezoelectric element 2 and the to ensure hydraulic clearance compensation 8.
  • the abutting contact surfaces 8a and 9a of the hydraulic lash adjuster 8 and the intermediate plate 9 are designed to be correspondingly curved, as can be seen in FIG. 2 is.
  • the actuator 1 shown in FIG. 1 is assembled as follows:
  • the head plate 4 and the spring element 3 are connected to one another via weld seams 10.
  • the piezoelectric element 2 is then inserted into the spring element 3, which is designed as a tubular spring, until it rests directly on the top plate 4.
  • the intermediate plate 9, which now has only a small mass, is placed under the piezo stack and the hydraulic lash adjuster 8 is then mounted thereon.
  • the hydraulic lash adjuster 8 forming the base plate 5 is mounted in such a way that the spring element 3 2003P08940

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

L'invention concerne une soupape d'injection pour l'injection de carburant dans un moteur à combustion interne. Selon l'invention, pour qu'il soit garanti que l'actionneur (1) ne présente, tout en ayant peu de surfaces de contact, qu'une faible masse à déplacer, il est proposé que l'élément de compensation de jeu (8) soit un composant de l'actionneur (1).
EP04787097A 2003-09-08 2004-09-03 Soupape d'injection pour l'injection de carburant dans un moteur a combustion interne Not-in-force EP1546542B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10341338 2003-09-08
DE10341338 2003-09-08
PCT/EP2004/052030 WO2005024223A1 (fr) 2003-09-08 2004-09-03 Soupape d'injection pour l'injection de carburant dans un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP1546542A1 true EP1546542A1 (fr) 2005-06-29
EP1546542B1 EP1546542B1 (fr) 2007-01-24

Family

ID=34258486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04787097A Not-in-force EP1546542B1 (fr) 2003-09-08 2004-09-03 Soupape d'injection pour l'injection de carburant dans un moteur a combustion interne

Country Status (3)

Country Link
EP (1) EP1546542B1 (fr)
DE (1) DE502004002760D1 (fr)
WO (1) WO2005024223A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170167457A1 (en) * 2014-02-07 2017-06-15 Ecomotors, Inc. Preloaded spring for use with a piezoelectric fuel injector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0656162B2 (ja) * 1987-03-03 1994-07-27 トヨタ自動車株式会社 ストロ−ク可変装置
DE19727992C2 (de) * 1997-07-01 1999-05-20 Siemens Ag Ausgleichselement zur Kompensation temperaturbedingter Längenänderungen von elektromechanischen Stellsystemen
DE19939133A1 (de) * 1999-08-18 2001-02-22 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10151688A1 (de) * 2001-10-19 2003-04-30 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE10310297A1 (de) * 2003-03-10 2004-09-23 Robert Bosch Gmbh Brennstoffeinspritzventil

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005024223A1 *

Also Published As

Publication number Publication date
EP1546542B1 (fr) 2007-01-24
DE502004002760D1 (de) 2007-03-15
WO2005024223A1 (fr) 2005-03-17

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